DIN HV Distribution. DIN HV fuses are partial-range high voltage currentlimiting fuses for use in distribution circuits from kV.

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1 DIN HV Distribution DIN HV fuses are partial-range high voltage currentlimiting fuses for use in distribution circuits from kV. Their compact dimensions and non-venting characteristics make them ideal for restricted enclosures. DIN HV fuses have excellent short circuit performance and good low overcurrent clearing capability. When used in combination with fusible switches with fuse-activated trip feature, full range clearing capability is achieved. True full-range fuses are available in certain voltage and amp ranges. Please contact Fusetek for more information. Features! Highly standardised DIN dimensions.! Excellent short circuit performance. Ceramic bodies, pure silver elements.! '30' series fuses have temperature sensitive striker to protect against extended overload conditions, or external overheating.! Sealed for indoor or outdoor use.(on Driescher products - use 'F' suffix on part number)! Striker pin can be used for visual indication or to actuate a 'trip all phase' mechanism.! High amp ratings available for larger installations. DRS factory paralleled configurations available.! Fully plated parts for cool running. Installation Notes 1. DIN fuses are partial range devices with a minimum interrupting rating. Care must be taken to ensure that anticipated currents below the fuse's minimum breaking current (m.b.c) are cleared by other devices. In this regard, DIN fuses are similar to ANSI - 'E' rated fuses. Full range DIN fuses are available in limited voltage and amp ranges. Please contact our offices for information. 2. When DIN fuses are used in conjunction with a trip-all-phase-device, the minimum breaking capacity of the switch or contactor must be equal to or greater than the m.b.c of the fuse. 3. Voltage ranges specified are minimum and maximum voltages for safe operation. The normal +/-10% utility tolerance on voltage must be taken into account when selecting a voltage range. 4. When replacing fuses in the field, ensure that contact clips are clean and free of corrosion, dirt, grease etc... Ensure that the fuse clips still have good tension. (if the fuse will spin easily in the fuse clips, the clips have lost their tension and should be replaced) 5. Fuses should be replaced in sets of three to avoid nuisance blowing caused by element damage.

2 Dimensions All DIN fuse share common end fittings which fit into 45mm fuse clips. The only dimensional variables are the body length (L) and body diameter (D). As this varies depending on voltage, amperage and other factors, please refer to the tables in this section for D and L dimensions. Striker pins meet industry and DIN requirements for force/travel and can be used for mechanical actuation or visual indication. Transformer application The fuse ratings recommended in the following tables have been chosen with the following conditions in mind:! Fuses must pass normal primary winding magnetising inrush currents: These are taken as 12x the normal full load current(flc) at.1 sec, and 25x FLC at.01 sec. Certain applications may require the use of a higher fuse rating. Please contact FUSETEK with application details.! After a sustained power outage, the fuse must be able to withstand an overload of approximately 6 x FLC for 1 sec. and 3 x FLC for 10 sec.! The maximum voltage rating of the fuse must be equal to, or greater than the maximum line-to-line system voltage. Capacitor application Refer to capacitor selection chart on page 44. Be sure to consider the switching options and proximity of other banks when establishing a base FLC to apply. Companion Products Insulators, clips, single pole bases - page For information on our range of load break switches, see the loadbreak section on page 33. peak curent (A) x Current cut-off characteristics (all voltage classes) Note: I 2 t and interrupting ratings shown in following tables are at maximum system voltage Prospective Short Circuit - rms Amps x 1000 pg 20

3 3.0/7.2kV Time in seconds Melting Time Current Characteristics RMS Amperes Part Number General Specifications A D x L (mm) I.R ka mbc A total I2t x kA rms kA rms kA kA rms kA rms Other body lengths and configurations available. Please contact Fusetek. Minimum fuse for transformers rated 7.2kV or less kva 2.4kV 4.16kV 4.8kV 6.9kV Dimensions (mm) 15 10A 6.3A 6.3A 6.3A 30 16A 16A 10A 10A 45 25A 16A 16A 16A 75 40A 25A 20A 16A A 40A 25A 20A A 40A 31.5A 25A A 50A 50A 40A A 63A 50A 40A A 100A 80A 63A A 125A 100A 80A A 160A 160A 100A A 250A 250A 160A A 315A 200A A 400A 250A A 315A A

4 6/12kV Time in seconds Melting Time Current Characteristics RMS Amperes Part Number General Specifications A D x L (mm) I.R ka mbc A total I2t x kA rms kA rm kA kA rms Other body lengths and configurations available. Please contact Fusetek. Minimum fuse for transformers rated 12kV or less kva 6.9kV 7.2kV 8.3kV 12kV Dimensions (mm) A 6.3A 6.3A 6.3A 30 10A 6.3A 6.3A 6.3A 45 16A 16A 10A 6.3A 75 16A 16A 16A 10A A 20A 20A 16A A 25A 25A 16A A 31.5A 31.5A 20A A 40A 40A 25A A 63A 63A 40A A 80A 80A 50A A 100A 100A 63A A 160A 125A 100A A 200A 160A 125A A 250A 250A 160A A 315A 315A 200A 4000 see 7.2kV class - 250A

5 10/17.5kV Time in seconds Melting Time Current Characteristics RMS Amperes Part Number General Specifications A D x L (mm) I.R ka mbc A total I2t x kA rms kA rms kA rms DRS15/160B kA DRS15/200B kA DRS15/250B kA x DRS15/315B rms DRS15/400B kA Other body lengths and configurations available. Please contact Fusetek. Minimum fuse for transformers rated 17.5kV or less kva 12.47kV 13.2kV 13.8kV.4kV Dimensions (mm) A 6.3A 6.3A 6.3A 75 10A 10A 10A 6.3A A 16A 16A 10A A 16A 16A 16A A 20A 20A 20A A 20A 20A 20A A 40A 31.5A 31.5A A 50A 50A 50A A 63A 63A 63A A 100A 80A 80A A 125A 100A 100A A 125A 125A 125A A 200A 200A 200A A 250A 250A 250A A 315A 315A 315A A 400A 400A 315A A 400A 400A 400A

6 20/27.6kV Time in seconds Melting Time Current Characteristics Part Number General Specifications A D x L (mm) I.R ka mbc A total I2t x kA kA kA kA rms kA rms RMS Amperes Other body lengths and configurations available. Please contact Fusetek. Fuse selection for transformers rated 25.8kV or less kva 17kV 23kV 24kV 25.8kV Dimensions (mm) A 10A 10A 10A A 10A 10A 10A A 16A 16A 16A A 16A 16A 16A A 20A 20A 20A A 31.5A 31.5A 25A A 40A 40A 40A A 63A 63A 50A A 80A 80A 63A A 80A 80A A 100A 80A

7 30/36kV Time in seconds Melting Time Current Characteristics RMS Amperes Part Number General Specifications A D x L (mm) I.R ka mbc A total I2t x kA rms kA rms kA rms DRS30/75B ka DRS30/100B5 100 rms DRS30/125A x kA DRS30/150B x kA DRS30/200B rms DRX30/250B x DRX30/315B Contact Fusetek Other body lengths and configurations available. Please contact Fusetek. DRS/DRX fuses are rated 38kV max. Fuse selection for transformers rated 36kV or less kva 25.8kV 27.6kV 34.5kV 36kV Dimensions (mm) A A 6.3A A 10A 10A 6.3A A 16A 10A 10A A 16A 16A 16A A 20A 16A 16A A 25A 20A 20A A 31.5A 25A 25A A 50A 40A 40A A 63A 50A 50A A 75A 63A 63A A 100A 75A 75A A 125A 100A 100A A 160A 125A 125A A 200A 160A 160A A 200A 200A 200A A 315A 250A 250A

8 E Rated Distribution fuses FC series power fuses are current limiting partial-range fuses usually used for fusing the primary windings of medium voltage distribution transformers and associated distribution circuits. Their high degree of current limitation greatly reduces the thermal and mechanical stresses imposed on system components during a short circuit. They can be used indoors or outdoors in a suitable enclosure and conform to standard N.American dimensions. E Rating Defined Features! General purpose 'E' rated characteristics.! Pure silver elements! Fully plated metal parts for cool running.! Excellent current limitation for substantial reduction of short circuit stresses.! Blown fuse indicator pin for visual indication or mechanical actua tion (except 2" body)! All D case (3" diam.) fuses can be supplied hermetically sealed and without indicator for use in Hazardous location applications. 100E or less: Fuse must open in 300sec at % of its rated current over 100E: Fuse must open in 600sec. at % of its rated current. Thus, fuses with identical E ratings will provide similar overload protection and coordination with transformer and other protective devices. Companion Products Standoff insulators, fuse clips and bases. Please see accessories section in rear of this section. For other ratings and designs, please contact Fusetek. Retrofitting Fusetek power fuses are dimensionally compatible with and interchangeable with other manufacturers' fuses having the same dimensions and ratings. Standard 'E' rated characteristics ensure electrical equivalency. Fuses should be replaced in sets of three to avoid nuiscance blowing caused by element damage. Tag Variations 3" diameter E rated fuses are available with the following options. Add the suffixes shown to the end of the part number - example; X Bi - - 2" longer tube to line up with some manufacturers' longer bodies. Offset mounting brackets for bolt mounting. W CL - - Hookeye disconnect feature. ITE/Gould style clip-lock mounting. See page 17 for drawing details of these options. pg 34

9 2" Format (B diam.) - General Specifications Vac Dimensions I.R Part Number Ratings available Type L CC Fig. rms sym. 2.5/2.7kV FC468 1, 2, 3, 5, 7, 10, 15, 20, 25A 50kA FC469 1, 2, 3, 5, 7, 10, 15, 20, 25A 50kA 4.8/5.5kV FC471 1, 2, 3, 5, 7, 10, 15, 20, 25A 50kA B 1 7.2/8.3kV FC472 1, 2, 3, 5, 7, 10, 15A 50kA 13.8/15.5kV FC473 1, 2, 3, 5, 7, 10, 15, 20, 25A 40kA 23/25.8kV FC474 1, 3, 5, 7,10A 32kA 3" Format (D diam.) Dimensions I.R Ratings available Vac Type L CC Fig. Part Number rms sym. 2.4/ / / / / /38kV D 1 ***E-1C DD 2 ***-2C ***-1C-5.5 D NLE-*** D-ITE 4 ***-1CL DD NLE2-*** D DD 10, 15, 20, 25, 30, 40, 50, 65, 80, 100, 125, 150, 175, 200E 125, 150, 175, 200, 225, 250, 300, 350, 400, 450E 10, 15, 20, 25, 30, 40, 50, 65, 80, 100, 125, 150, 175, 200E ***-2C , 200, 225, 250, 300, 350, 400, 450E ***-1C , 15, 20, 25, 30, 40, 50, 65, 80, NLE-*** 100E ***-2C NLE2-*** ***-1C-15.5 D GSE-*** NLE-*** D-ITE 3 ***-1CL ***-2C-15.5 DD GSE2-*** NLE-*** 125, 150, , 250, 300E 10, 15, 20, 25, 30, 40, 50, 65, 80, 100E 65, 80, 100, 125, 150, 175, 200E D 1 ***-1C , 20, 25, 30, 40, 50E DD 2 ***-2C , 80, 100E D 1 ***-1C-38 15, 20, 25, 30, 40E DD 2 ***-2C-38 50, 65, 80E 50kA 50kA 50kA 40kA 40kA 20kA pg 35

10 E rated fuse Application E rated fuses are used to isolate the voltage transformer from the supply in the event of a primary winding failure. Properly selected fuses will also operate quickly if there is a short circuit on the secondary side of the transformer. To provide optimum protection without nuisance blowing, it is necessary to consider the following points:! The interrupting rating must be equal to or greater than the largest anticipated short circuit.! The fuse must pass the magnetising inrush to the primary windings without damage or operation. This inrush is normally considered to be 12 times the primary FLC for 0.1 second.! The fuse's voltage rating must be equal to, or greater than the system voltage. 3 phase FLC = kva x 1000 Single phase FLC = kva x 1000 vac x 1.73 vac all 2" (B) Format Transformer Application Table Transformer Primary FLC (A) from to Fuse rating (A) Time in seconds Melting Time current Characteristics RMS Amperes pg 36

11 5.5kV - 3" Body 'E' rated Distribution fuses Time in seconds Melting Time Current Characteristics RMS Amperes Part Number General Specifications A D x L (mm) I.R ka mbc A XXXE-1C kA rms XXXE-2C x kA rms To complete part number, replace XXX with amp rating Fuse selection for transformers rated 5.5kV or less kva 2.4kV 4.16kV 4.8kV 5.5kV Dimensions (in.) 15 10E E 15E 10E 10E 45 20E 15E 15E 15E 75 30E 20E 15E 15E E 25E 20E 20E Fig. 1 - D E 30E 30E 25E E 50E 40E 40E E 65E 65E 50E E 100E 100E 80E Fig. 2 - DD E 125E 100E 100E E 200E 125E 125E E 250E 250E 200E E 300E 250E E 350E 350E E 400E pg 37

12 8.3kV - 3" Body 'E' rated Distribution fuses Time in seconds 1000 Melting Time Current Characteristics Part Number General Specifications A D x L (inch) I.R ka mbc A total I2t x **E-1C **E-2C x **E-3C-8.3 3x3 RMS Amperes ** - add amp rating to complete part number Fuse selection for transformers rated 8.3kV or less kva 5.5kV 6.9kV 7.2kV 8.3kV Dimensions (in.) 45 10E 10E 10E E 15E 15E E 15E 15E 10E E 20E 20E 15E E 30E 30E 20E E 40E 40E 30E E 65E 65E 50E E 100E 100E 80E E 125E 100E 100E E 125E 150E 150E E 200E 200E 200E E 300E 250E 250E E 350E 350E 300E E 350E 350E E 350E Fig.1 - D Fig. 2 - DD pg 38

13 15.5kV - 3" Body 'E' rated Distribution fuses Time in seconds Melting Time Current Characteristics RMS Amperes Part Number **E-1C-15.5 **E-2C-15.5 **E-3C-15.5 General Specifications A D x L (mm) I.R ka mbc A total I2t x kA x x insert amp rating for ** in above part numbers to complete Fuse selection for transformers rated 15.5kV or less kva 12.47kV 13.2kV 13.8kV.4kV Dimensions (in.) E 15E 15E 10E E 15E 15E 15E E 20E 20E 20E E 30E 30E 30E Fig. 1 - D E 50E 50E 50E E 80E 80E 65E E 100E 100E 80E E 125E 125E 125E E 150E 150E 150E E 150E 150E 150E Fig. 2 - DD E 200E 200E 200E pg 39

14 HV DIN fuse bases DRIWISA fuse bases are available in single or 3 pole versions in 630 or 1250A (dual clip) versions. Supported voltages are 7.2, 17.5, 25.8 and 38kV. Base is heavy duty galvanised steel with epoxy resin standoff insulators. 630A silver plated clips are standard. 3 pole versions can be fitted with auxilliary microswitches for remote blown-fuse annunciation. Note: these bases can be modified to accept North American E rated fuses. Please contact Fusetek for details. Part numbers for 630A single & 3 pole DIN fuse bases Fuse body length (BL) Vac No. Poles BL=192mm BL=292mm BL=442mm BL=537mm 7.2kV 17.5kV 25.8kV 38kV 1 SP07/061AMN SP07/062AMN SP07/064AMN SP07/065AMN 3 DSP07/061AMN DSP07/062AMN DSP07/064AMN DSP07/065AMN 1 - SP15/062AMN SP15/064AMN SP15/065AMN 3 - DSP15/062AMN DSP15/064AMN DSP15/065AMN SP20/064AMN SP20/065AMN DSP20/064AMN DSP20/065AMN SP30/065AMN DSP30/065AMN Specifications MAXIMUM RATED BASIC IMPULSE LEVEL WITHSTAND VOLTAGE VOLTAGE CURRENT (BIL) 1.2 x 50 s 60 hz 1 min DRY SERIE Up Ud kv A kv kv TO GROUND ACROSS TO GROUND ACROSS Ur Ir AND BETWEEN OPEN AND BETWEEN OPEN POLES GAP POLES GAP pg 32

15 FUSES HHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS The striker pin system is connected by means of a high resistance parallel conductor. After melting the main fuse elements the striker pin will indicate the operation status of the fuse and open a load break switch or actuate a microswitch for remote indication. Design and construction SIBA HV Fuse-links have parallel connected pure silver fuse-elements. The design and method of production of the elements ensures narrow tolerances of time-currentcharacteristics. The fuse elements are wound on a ceramic support and are attached to the silver plated connection caps by means of spot-welding. The connection caps are fitted inside the silver plated copper end caps by spot welding. The copper end caps themselves are press-fitted onto the porcelain tube which is glazed inside and outside. The end caps are furthermore mechanically fixed to the porcelain tube and additionally sealed by a durable elastic sealing medium. This sealing method has been proven over many decades of positive field experience and ensures tightness against ingress of humidity. Striker pin SIBA HV Fuse-links are available with striker pins of the force: 80 N (Part No for basic-type) and 120 N (Part No. 30 for variant-type) The characteristics of both striker pins corresponds to IEC , VDE 0670 Part 4 and are of the energycategory medium. The temperature limiting function of the fuse striker pin SIBA HV Fuse-links up to and including 160 A with a striker pin of 80 N are equipped with an integrated temperature limiter as standard. The temperature limiter is fitted inside the striker pin system. The SIBA striker pin system therefore has the following functions: thermal protection of adjacent equipment, especially SF6 Insulated switchgear limitation of failure current at the overload region improved properties for the switch-fuse combinations according IEC The integrated temperature limiter avoids inadmissible high temperatures no matter for whatever reason they are generated in gas-insulated switchgear or narrow switchgear enclosures. By means of a melting activator temperatures inside the fuse link enclosure are limited to below approx. 100 C. This design especially considers continuity of current supply for the end user for as long as possible. The system reacts in such a way that short time overloads do not cause the fuse to interrupt the circuit unnecessarily. Only when inadmissible values are exceedes the fuse will open the switch via the striker pin. Higher temperatures on plastic fuse enclosures in SF6- insulated switchgear can be caused by: selection of a fuse rating too low for transformer protection fuses are loaded with fault currents below the minimum operating current deterioration of fuse links caused by transient fault currents (e.g. lightning strike) transformer faults currents (e.g. winding short-current) overloading of the fuse when loaded with currents as described in IEC 420 Test Duty 3 additional temperatures rise because of poor clip fitting Fuse-links with integrated temperature limiter are compatible with standard Fuse links. All coordination schedules can be used. Further information on our temperature limiter, design, construction, can be obtained from our website. HHD 1

16 HHD FUSES HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS Selection Guide Rated Voltage DIN Size Class Part No. Selection Techn. AC E Guide Data kv mm Page Page 3/ Back up HHD 5 HHD 23 3/ Back up HHD 5 HHD 23 3/ Back up HHD 5 HHD 23 3/ Back up HHD 5 HHD 23 3/ Back up HHD 6 HHD 23 3/ Back up HHD 6 HHD 23 3/ Back up HHD 6 HHD 23 3/ Back up HHD 6 HHD 23 3/ Back up HHD 7 HHD 24 3/ Back up HHD 7 HHD 24 3/ Back up HHD 7 HHD 24 6/ Back up HHD 8 HHD 25 6/ Back up HHD 8 HHD 25 6/ Back up HHD 9 HHD 25 6/ Back up HHD 9 HHD 25 6/ Back up HHD 9 HHD 25 6/ Back up HHD 9 HHD 25 6/ Back up HHD 10 HHD 26 6/ Back up HHD 10 HHD 26 6/ Back up HHD 10 HHD 26 6/ Back up HHD 10 HHD 26 6/ Back up HHD 11 HHD 26 6/ Back up HHD 11 HHD 26 10/ Back up HHD 12 HHD 27 10/ Back up HHD 12 HHD 27 10/ Back up HHD 12 HHD 27 10/ Back up HHD 13 HHD 27 10/ Back up HHD 13 HHD 27 10/ Back up HHD 13 HHD 27 10/ Back up HHD 13 HHD 27 10/ Back up HHD HHD 28 10/ Back up HHD HHD 28 10/ Back up HHD HHD 28 HHD 2

17 FUSES HHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS Selection Guide Rated Voltage DIN Size Class Part No. Selection Techn. AC E Guide Data kv mm Page Page 10/ Back up HHD 15 HHD 29 10/ Back up HHD 15 HHD 29 10/ Back up HHD 16 HHD 29 10/ Back up HHD 16 HHD 29 10/ Back up HHD 16 HHD 29 10/ Back up HHD 17 HHD 30 10/ Back up HHD 17 HHD 30 10/ Back up HHD 17 HHD 30 10/ Back up HHD 17 HHD 30 20/ Back up HHD 18 HHD 31 20/ Back up HHD 19 HHD 31 20/ Back up HHD 19 HHD 31 20/ Back up HHD 19 HHD 31 6/ General purpose HHD 21 HHD 32 6/ General purpose HHD 21 HHD 32 6/ General purpose HHD 21 HHD 32 10/ General purpose HHD 22 HHD 32 10/ General purpose HHD 22 HHD 32 10/ General purpose HHD 22 HHD 32 Selection Guide Fuse-bases Article Rated Voltage DIN-Size Part No. Techn. AC E Data kv mm Page Indoor Fuse-bases HHD HHD HHD HHD HHD 40 Outdoor Fuse-bases HHD HHD HHD HHD 41 HHD 3

18 HHD FUSES HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS Selection Guide Microswitch fitting consists of Article Length Part No. Techn. mm Data Page Microswitch HHD HHD 42 Fuse Clip HHD 43 Distance Plate HHD 43 Selection Guide Accessories Article Rated Part No. Techn. Voltage Data kv Page Extension Adapter 12/ HHD 44 Test Fuse-link for gas HHD 45 insulated switchgear Contact Clip 200 A HHD 46 indoor and outdoor Contact Clip HHD 46 heavy duty Storage Holder HHD HHD HHD 47 HHD 4

19 FUSES HHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E=192 mm AC 3/7.2 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A A A A A A Prefered Standard size 3/7.2 kv A 1.77 (45 mm) F 1.30 (33 mm) O 0.40 (10 mm) N 1.38 (35 mm) HHD 5

20 HHD FUSES HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 292 mm AC 3/7.2 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A A A A A A A A A 1.77 (45 mm) F 1.30 (33 mm) O 0.40 (10 mm) N 1.38 (35 mm) HHD 6

21 FUSES HHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 442 mm AC 3/7.2 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 100 A A A A A A A A A A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD 7

22 HHD FUSES HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 192 mm AC 6/12 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD 8

23 FUSES HHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 292 mm AC 6/12 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A A A A A Prefered Standard size 6/12 kv A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD 9

24 HHD FUSES HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 442 mm AC 6/12 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A A A A A A A 1.77 (45 mm) F 1.30 (33 mm) O 0.40 (10 mm) N 1.38 (35 mm) HHD 10

25 FUSES HHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 537 mm AC 6/12 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 100 A A A A A A A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD 11

26 HHD FUSES HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 292 mm AC 10/17.5 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A A A A A 1.77 (45 mm) F 1.30 (33 mm) O 0.40 (10 mm) N 1.38 (35 mm) HHD 12

27 FUSES HHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 367 mm AC 10/17.5 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A A A A A A 1.77 (45 mm) F 1.30 (33 mm) O 0.40 (10 mm) N 1.38 (35 mm) HHD 13

28 HHD FUSES HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 442 mm AC 10/17.5 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A A A A A A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD

29 FUSES HHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 292 mm AC 10/24 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD 15

30 HHD FUSES HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 442 mm AC 10/24 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A A A Prefered Standard size 10/24 kv A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD 16

31 FUSES HHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 537 mm AC 10/24 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A A A A A A A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD 17

32 HHD FUSES HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 442 mm AC 20/36 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD 18

33 FUSES HHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 537 mm AC 20/36 kv Back up DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A Prefered Standard size 20/36 kv A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD 19

34 HHD FUSES HIGH VOLTAGE FUSES GERMAN DIN STANDARD GENERAL PURPOSE FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS According IEC and VDE 0670 Part 4, a General-Purpose-Fuse interrupts fault currents between the rated breaking current and the current which causes melting within one hour. The protection range of the SIBA- VS-Protector extends this basic demand. The minimum breaking current is about 1.5 times the rated current. In combination with the temperature released striker pin a full range protection is possible. Additional feature is the small powerloss of the VS-Protector. It is up to 40 % smaller than the standard DIN-fuse. VS-Protector for the overload and short-circuit range The dimensions of the VS-Protector are according to DIN The rated voltages 12 and 24 kv and also the available current ratings allow protection of transformers up to 630 kva. The function of the VS-Protector is comparable to a typical Back up Fuse link. The melting elements of pure silver are wound inside onto a ceramic support. A short section in the center of the fuse is designed as a Heat chamber. Inside this chamber the elements are made of silver-alloy. They generate a certain level of temperature at overloads. As a result the fuses interrupt at low fault-currents without ageing. HHD 20

35 FUSES HHD HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 292 mm AC 6/12 kv General purpose DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A A A A A A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD 21

36 HHD FUSES HIGH VOLTAGE FUSES GERMAN DIN STANDARD FOR AIR & GAS INSULATED SWITCHGEARS OUTDOOR SWITCHGEARS DIN Size Rated voltage Class Standard E= 442 mm AC 10/24 kv General purpose DIN IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm current (kg/1) ka 6.3 A A A A A A A A F O N 1.77 (45 mm) 1.30 (33 mm) 0.40 (10 mm) 1.38 (35 mm) HHD 22

37 Electrical Characteristics FUSES HHD DIN Size Rated voltage Class E= 192 mm AC 3/7.2 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66, A ,000 78,000 0, A , , , A , , A , , , A , , A , , ,000 1,101,000 DIN Size Rated voltage Class E= 292 mm AC 3/7.2 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66, A ,000 78,000 0, A , , , A , , A , , , A , , A , , ,000 1,101, A , ,000 1,066,000 1,616, A , ,000 1,420,000 2,225,000 TIME CURRENT CHARACTERISTICS AND CUT OFF CURRENT DIAGRAM PLEASE REFER TO PAGES HHD 33 AND HHD 34 HHD 23

38 HHD FUSES Electrical Characteristics DIN Size Rated voltage Class E= 442 mm AC 3/7.2 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 100 A , , , A , , A , , , A , , A , , ,000 1,101, A , ,000 1,066,000 1,616, A , ,000 1,420,000 2,225, A , ,000,000 1,900,000 2,528, A , ,668,000 3,162,000 4,500,000 TIME CURRENT CHARACTERISTICS AND CUT OFF CURRENT DIAGRAM PLEASE REFER TO PAGES HHD 33 AND HHD 34 HHD 24

39 Electrical Characteristics FUSES HHD DIN Size Rated voltage Class E= 192 mm AC 6/12 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66,000 DIN Size Rated voltage Class E= 292 mm AC 6/12 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66, A ,000 78,000 0, A , , , A , , A , , , A , ,000 TIME CURRENT CHARACTERISTICS AND CUT OFF CURRENT DIAGRAM PLEASE REFER TO PAGES HHD 33 AND HHD 34 HHD 25

40 HHD FUSES Electrical Characteristics DIN Size Rated voltage Class E= 442 mm AC 6/12 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66, A ,000 78,000 0, A , , , A , , A , , , A , , A , , ,000 1,101,000 DIN Size Rated voltage Class E= 537 mm AC 6/12 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 100 A , , , A , , A , , , A , , A , , ,000 1,101, A , ,000 1,066,000 1,616,000 TIME CURRENT CHARACTERISTICS AND CUT OFF CURRENT DIAGRAM PLEASE REFER TO PAGES HHD 33 AND HHD 34 HHD 26

41 Electrical Characteristics FUSES HHD DIN Size Rated voltage Class E= 292 mm AC10/17.5 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66, A ,000 78,000 0, A , , , A , , A , , ,000 DIN Size Rated voltage Class E= 367 mm AC 10/17.5 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66, A ,000 78,000 0, A , , , A , , A , , , A , ,000 TIME CURRENT CHARACTERISTICS AND CUT OFF CURRENT DIAGRAM PLEASE REFER TO PAGES HHD 33 AND HHD 34 HHD 27

42 HHD FUSES Electrical Characteristics DIN Size Rated voltage Class E= 442 mm AC 10/17.5 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66, A ,000 78,000 0, A , , , A , , A , , , A , ,000 TIME CURRENT CHARACTERISTICS AND CUT OFF CURRENT DIAGRAM PLEASE REFER TO PAGES HHD 33 AND HHD 34 HHD 28

43 Electrical Characteristics FUSES HHD DIN Size Rated voltage Class E= 292 mm AC 10/24 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66,000 DIN Size Rated voltage Class E= 442 mm AC 10/24 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66, A ,000 78,000 0, A , , , A , ,000 TIME CURRENT CHARACTERISTICS AND CUT OFF CURRENT DIAGRAM PLEASE REFER TO PAGES HHD 33 AND HHD 34 HHD 29

44 HHD FUSES Electrical Characteristics DIN Size Rated voltage Class E= 537 mm AC 10/24 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66, A ,000 78,000 0, A , , , A , , A , , , A , ,000 TIME CURRENT CHARACTERISTICS AND CUT OFF CURRENT DIAGRAM PLEASE REFER TO PAGES HHD 33 AND HHD 34 HHD 30

45 Electrical Characteristics FUSES HHD DIN Size Rated voltage Class E= 442 mm AC 20/36 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 3,000 DIN Size Rated voltage Class E= 537 mm AC 20/36 kv Back up Rated Part No. Rated Minimum Cold Power Pre-arcing Total I 2 t value current breaking breaking resistance loss I kv current ka current A mohm W A 2 s A 2 s A 2 s 6.3 A A A ,100 2, A ,900 4, A ,050 4,700 7, A ,700 6,600 12, A ,900 12,000 19, A ,700 20,000 33, A ,700 40,000 66, A ,000 78,000 0,000 TIME CURRENT CHARACTERISTICS AND CUT OFF CURRENT DIAGRAM PLEASE REFER TO PAGES HHD 33 AND HHD 34 HHD 31

46 HHD FUSES Electrical Characteristics DIN Size Rated voltage Class E= 292 mm AC 6/12 kv General Purpose Rated Part No. Breaking Cold Power Pre-arcing Total I 2 t value current current resistance loss I 2 12 kv ka mohm W A 2 s A 2 s 6.3 A A , A , A , A , A ,330 11, A ,100 18, A ,400 28, A ,500 33, A ,500 68, A ,200 2, A , ,000 DIN Size Rated voltage Class E= 442 mm AC 10/24 kv General Purpose Rated Part No. Breaking Cold Power Pre-arcing Total I 2 t value current current resistance loss I 2 24 kv ka mohm W A 2 s A 2 s 6.3 A A , A , A , A , A ,330 11, A ,100 18, A ,400 28,000 TIME CURRENT CHARACTERISTICS AND CUT OFF CURRENT DIAGRAM PLEASE REFER TO PAGE HHD 35 HHD 32

47 Electrical Characteristics FUSES HHD Time Current Characteristics Back up t(s) Virtual Pre-arcing Time RMS Prospective Current I(A) Cut Off Current Diagram Back up Ic (ka) Cut-off Current Peak Prospective Short Circuit Current I(kA) HHD 33

48 HHD FUSES Electrical Characteristics Time Current Characteristics Back up t(s) Cut-off Current Peak Virtual Pre-arcing Time RMS Prospective Current I(A) Cut Off Current Diagram Back up Ic (ka) Prospective Short Circuit Current I(kA) HHD 34

49 Electrical Characteristics FUSES HHD Time Current Characteristics General Purpose t(s) Virtual Pre-arcing Time RMS Prospective Current I(A) Cut Off Current Diagram General Purpose Ic (ka) Cut-off Current Peak Prospective Short Circuit Current I(kA) HHD 35

50 HHD FUSES HV fuse link Vertical Cross Section Weather resistant label Integrated temperature limiter Sealing compound Shaped cap Melting element support Thermal Zone (at General Purpose fuse only) Ceramic insulating tube Silver melting element welded to contact strap Force / distance diagram Connecting straps pastened to contactcap by resistance welding 80 N 120 N Quarzsand mm mm HHD 36

51 FUSES HHD Recommendation for the protection of main transformer with HV-Fuse links DIN Standard Protection using LV-Fuse links* operating class gg / gl on the low voltage side TYPE A Transformer Line Voltage (kv) LV fuse rated capacity gg / gl (kva) Rated current of the HV-fuse (A) (A) x x * Use of the recommended HV-Fuse links in connection with LV-fuse links of other manufacturer must be checked before installation TYPE A SIBA HV SIBA LV - gg / gl SIBA LV - gg / gl HHD 37

52 HHD FUSES Recommendation for the protection of main transformer with HV-Fuse links DIN Standard Protection without using a common LV-Fuse link on the low voltage side; the individual cable exits are protected with a LV-Fuse link operating class gl / gg TYPE B Transformer Line Voltage (kv) rated capacity (kva) Rated current of the HV-fuse (A) x x TYPE B SIBA HV SIBA LV - gg / gl HHD 38

53 FUSES HHD Application recommendation for protection of capacitors with HV-Fuse links DIN Standard Assignment of rated currents of HV-Fuse links to DIN Standard to Capacitor rated capacities Capacitor Line Voltage (kv) rated capacity (kvar) Rated current of the HV-fuse (A) To control the occuring voltage during switch off Fuse link should be chosen from the next higher voltage range. e.g. 10 kv Capacitor with 20 kv Fuse links. (See also IEC 549, Chapter II, 3.2) HHD 39

54 HHD FUSES HV Fuse-bases for indoor application Rated Voltage 7.2 kv Part No Rated Voltage 12 kv Part No Rated Voltage 24 kv Part No Rated Voltage 36 kv Part No Rated Voltage 24 kv Part No * A (350 mm) A (450 mm) A (600 mm) A (695 mm) A (450 mm) B 1.38 (35 mm) C 3.35 (85 mm) D 0.70 (18 mm) E 7.60 (193 mm) F 6. (156 mm) G (310 mm) H 9.53 (242 mm) I 0.60 (15 mm) J 2.17 (55 mm) K 1.38 (35 mm) L.96 (380 mm) B 1.38 (35 mm) C 3.35 (85 mm) D 0.70 (18 mm) E (293 mm) F 6. (156 mm) G 16. (410 mm) H 9.53 (242 mm) I 0.60 (15 mm) J 7.10 (180 mm) L (480 mm) B 1.38 (35 mm) C 3.35 (85 mm) D 0.70 (18 mm) E (443 mm) F 9.30 (236 mm) G (574 mm) H (322 mm) I 0.60 (15 mm) J (300 mm) L (630 mm) B 1.38 (35 mm) C 3.35 (85 mm) D 0.70 (18 mm) E (538 mm) F (326 mm) G (676 mm) H (412 mm) I 0.60 (15 mm) J.96 (380 mm) L (725 mm) B 1.38 (35 mm) C 3.35 (85 mm) D 0.70 (18 mm) E (293 mm) F 9.30 (236 mm) G 16. (410 mm) H (322 mm) I 0.60 (15 mm) J 7.10 (180 mm) L (480 mm) * Reduced Length for 24 kv Fuse links, E= 292 mm HHD 40

55 FUSES HHD HV Fuse-bases for outdoor application Rated Voltage 7.2 kv Part No Rated Voltage 12 kv Part No Rated Voltage 24 kv Part No Rated Voltage 36 kv Part No A (350 mm) A (450 mm) A (600 mm) A (695 mm) B 1.38 (35 mm) C 4.72 (120 mm) D 0.80 (20 mm) E 7.60 (193 mm) F 9.33 (237 mm) G 16. (410 mm) H (325 mm) I 0.60 (15 mm) J 2.17 (55 mm) K 1.38 (35 mm) L.96 (380 mm) N 3.15 (80 mm) O 0.43 (11 mm) P.57 (370 mm) B 1.38 (35 mm) C 4.72 (120 mm) D 0.80 (20 mm) E (293 mm) F 9.33 (237 mm) G (510 mm) H (325 mm) I 0.60 (15 mm) J 7.10 (180 mm) L N O P (480 mm) 3.15 (80 mm) 0.43 (11 mm) (470 mm) B 1.38 (35 mm) C 4.72 (120 mm) D 0.80 (20 mm) E (443 mm) F (307 mm) G (660 mm) H (395 mm) I 0.60 (15 mm) J (300 mm) L N O P (630 mm) 3.15 (80 mm) 0.43 (11 mm) (620 mm) B 1.38 (35 mm) C 4.72 (120 mm) D 0.80 (20 mm) E (538 mm) F (387 mm) G (785 mm) H (475 mm) I 0.60 (15 mm) J.95 (380 mm) L N O P (725 mm) 3.15 (80 mm) 0.43 (11 mm) (620 mm) HHD 41

56 HHD FUSES Microswitch Part No. L= 660 mm L= 900 mm Microswitch Part No V / 6 A 1 change over contact Flexible Cable Connection bar of the spring clip contact Part No HV-Fuse cap HHD 42

57 FUSES HHD Fuse Clip Part No. HV-Spring clip contact with connection bar A 1.38 (35 mm) B 1.26 (32 mm) F 0.24 (156 mm) G 2.80 (71.5 mm) H 3.74 (95 mm) L 3.66 (93 mm) M M 10 Spacer Part No A 1.26 (32 mm) B 1.38 (35 mm) C 0.24 (6 mm) D 0.40 (18 mm) E 0.20 (5 mm) F 0.70 (18 mm) G 0.26 (6.5 mm) HHD 00 43

58 HHD FUSES 24 kv Extension adapter for high voltage Fuses 12kV Part No A 1.77 (45 mm) B 0.06 (1.5 mm) C 2.00 (51 mm) D 1.73 (44 mm) F 1.77 (45 mm) G 0.20 (5 mm) H 2.76 (70 mm) L 7.28 (185 mm) HV-Fuse with 24 kv Extension adapter (Part No ) A 1.77 (45 mm) E (292 mm) E (442 mm) F 1.30 (33 mm) L (508 mm) HHD 44

59 FUSES HHD Test-Fuse with time delayed release for testing the release mechanism in enclosed medium voltage switchgear Part No A 1.77 (45 mm) D 2.76 (70 mm) E 7.56 (192 mm) F 1.34 (34 mm) G 0.30 (8 mm) H 1.06 (27 mm) L (260 mm) Clamp lever for timer Force (N) To change E an adaptor is available from 192 mm to 292 mm Part No from 192 mm to 442 mm Part No Travel (mm) HHD 00 45

60 HHD FUSES HV-Contact clip Rated Current for indoor and outdoor application 200 A Part No B 1.26 (32 mm) G 2.80 (71.5 mm) H 3.74 (95 mm) HV-Contact clip Rated Current for indoor and outdoor application > 200 A Part No B 1.26 (32 mm) G 2.90 (73.5 mm) H 4.92 (125 mm) HHD 46

61 HHD FUSES HHD 48

62 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Overview DRIWISA high voltage, current-limiting fuses are devices with a high interrupting capacity to protect high voltage systems against short-circuits. They are selective elements for individual operation, with very well defined time-current characteristics, ideal for protection of transformers, motors, capacitors banks, cables, lines and other high voltage equipment installed in switchgear and distribution networks. The accumulated experience for almost 30 years of DRIESCHER Y WITTJOHANN, S.A. in Mexico with the support of FRITZ DRIESCHER GmbH in Germany, has permitted the use of the electrical principles and phenomena involved during the fusing and arcing process, which are the basis to design and manufacture the fuses with a high dependability and quality level. The company has also characterized herself for the support and instructing capacity for its customers, making sure, that every technical problem the client has, is solved to a complete satisfaction. DRIWISA high voltage, current-limiting fuses are designed and manufactured according to international standards. This means, that the mechanical and dimensional features, such as the tube diameters and lenghts and the force of the tripping pin of the fuses are according to these standards. The electrical features and specifications, such as the maximum interrupting current (I 1 ), the critical interrupting current (I 2 ), and the minimum interrupting current (I 3 ) have been satisfactorily tested in internationally recognized labotarories. DRIWISA fuses are built within a service range from 2.4 to 38 kv. The DRS series is built for indoor use, while the DRS series (with "F" end-code) is used in outdoor applications, even for installation in tropical and very humid climates, for system frecuencies from 40 to 60 Hz. These fuses can be installed on special fuse-holders, non-load isolator switches and load-break disconnecting switches, thus giving an adecuate protection against the dangerous thermic and dynamic stresses during a short-circuit (refer to the corresponding sections in the catalogue). Fuses from the DRK series, having tapped end-caps, may be used for capacitor protection, being screwed directly onto the capacitor bushings. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-1

63 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Currrent-limiting: When protecting equipment such as transformers, motors, capacitors, cables or lines with DRIWISA fuses the currents flowing in case of a short-circuit are considerably reduced, due to the current-limiting characteristic of the fuses (refer to Figure 5 in the Fuse Manual). Fuses not sensitive to transformer or motor inrush currents: Due to their relatively slow time-current characteristic, DRIWISA fuses installed to protect transformers or motors do not exhibit premature fusion or degradation of the fuse-elements if selected according to the recommendations given in Technical Bulletins 201 and 202. Permanently fixed fuse-elements: The fuse-elements are wound on special element-holders with dented borders to ensure they are held in place permanently, thus avoiding dislocation and preventing internal short-circuits, which would provoke a degradation of the fuses characteristics. Tripping device with excellent operation characteristics: DRIWISA fuses are equipped with a tripping device (striker pin) acting through a stored-energy mechanism in a precompressed spring, which trips with a force of 120 N (120 kp), large enough to even open disconnecting switches which have not been operated during an extended period of time, thus presenting friction and resistance due to dust, dirt and corrosion (refer to Figure 3 in the Fuse Manual). High interrupting capacity: DRIWISA fuses display a high interrupting capacity which permits the interruption of very high short-circuit currents (refer to Figure 6 in the Fuse Manual). Selectivity and protection coordination: Maintaining a ratio of 1:1.6 between fuses installed in series the right coordination and protection selectivity is achieved, which makes isolation and faultdetection easy. Unnecessary power interruptions can be avoided (refer to section "Selection" in the Fuse Manual). Special sealing of fuses for outdoor service: The sealing of the fuses is accomplished by the use of special epoxic resins to avoid moisture penetration. For outdoor service fuses a special weld is used to perfectly seal against humidity. Repair with factory warranty: Due to their special design and construction DRIWISA fuses are the only ones that permit repairing in the factory, guaranteeing their original characteristics, when the porcelain tube has not been damaged. This means an interesting economic saving feature and an alternative for recicling materials, as a contribution to the environment protection. Immediate availability: Due to the large distribution network set up by DRIESCHER Y WITTJOHANN S.A. with authorized representatives located at strategic locations, DRIWISA fuses are made available on short notice, thus representing a great advantage for the immediate replacement of used elements. Technical support: DRIESCHER Y WITTJOHANN, S.A. offers her customers immediate technical support and advise when needed as for the proper selection of the right fuse for each particular case, to protect transformers, motors, capacitors, distribution lines and any other high voltage equipment, editing technical bulletins with complementary information on the fuses and on subjects related to their application, selection and maintenance. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-2

64 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE SELECTION CHART DRIESCHER Y WITTJOHANN, S.A. manufactures DRIWISA fuses types DRS, DRK and DRN for the voltage and current ratings shown in the Tables of pages 5 to 11 with the interrupting capacities and dimensions given in the corresponding columns. The following versions are available: TYPE END-CODE CHARACTERISTICS / APPLICATION DRS without Indoor service, with striker-pin from 2 Amperes. For transformer, end-code motor and overhead lines and cable feeders protection. Commonly used in combination with load-break switches and vacuum contactors. DRS...F...F Outdoor service, for polluted or humid environments. For transformer, motor and overhead lines and cable feeders protection. DRK without Indoor service, tapped end-caps, without striker pin. For capacitor protection. end-code Screw-mounted on bushings. DRN without Indoor service, without striker-pin, 1, 2 and 4 Amperes only for potential end-code transformer protection. They have special "e" lenghts. For mounting on fuse-holders. MAXIMUM VOLTAGE SERIE (phase to phase) kv DR DR DR DR DR DR DR Selection criteria are chosen according to the application, as described in Technical Bulletins 201 to 205. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-3

65 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE General specifications Fuse dimensions according to international standards. Type DRS and DRS F with striker-pin Indoor service: without end-code Outdoor service: with F end-code DRS..A DRS..B 2 66 mm 85 mm size e mm e mm mm mm L e + 66 mm DW-2002 Type DRK and DRK F without striker-pin For capacitor protection Indoor and outdoor service DRK..A DRK..B 2 66 mm 85 mm size e mm e mm mm mm L e + 66 mm DW-2003 Type DRN and DRN F without striker-pin Indoor service: without end-code Outdoor service: with F end-code For potential transformer protection. 1, 2 and 4 Amp. DRN Voltage size e mm 7.2 y 17.5 kv e mm 25.8 kv mm 38 kv L e + 60 mm Dimensions in mm DW-2001 HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-4

66 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Fuses with striker pin for transformer, motor and overhead lines and cable feeders protection. INTERRUPTING MINIMUM RATED CAPACITY INTERRUPTING DIMENSIONS WEIGHT TYPE CURRENT I n I 1 CURRENT I 3 e L 1 2 approx. A ka A mm mm mm mm kg Vmax = 13.8 kv DRS13/002-A DRS13/004-A DRS13/006-A DRS13/010-A DRS13/016-A DRS13/025-A DRS13/032-A DRS13/040-A DRS13/050-A DRS13/063-A DRS13/075-B DRS13/100-B Vmax = 17.5 kv DRS15/002-A DRS15/004-A DRS15/006-A DRS15/010-A DRS15/016-A DRS15/025-A DRS15/032-A DRS15/040-A DRS15/050-A DRS15/063-A DRS15/075-B DRS15/100-B DRS15/125-B DRS15/160-B DRS15/200-B DRS15/200-B Vmax = 25.8 kv DRS20/002-A DRS20/004-A DRS20/006-A DRS20/010-A DRS20/016-A DRS20/025-A DRS20/032-A DRS20/040-A DRS20/050-A DRS20/063-A DRS20/063-B DRS20/075-B DRS20/100-B DRS20/125-B DRS20/160-B DRS20/125-B DRS20/160-B HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-5

67 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Fuses with striker pin for transformer, motor and overhead lines and cable feeders protection. INTERRUPTING MINIMUM RATED CAPACITY INTERRUPTING DIMENSIONS WEIGHT TYPE CURRENT I n I 1 CURRENT I 3 e L 1 2 approx. A ka A mm mm mm mm kg Vmax = 4.8 kv DRS04/125-B DRS04/160-B DRS04/125-B DRS04/160-B DRS04/200-B DRS04/250-B DRS04/315-B Vmax = 7.2 kv DRS07/002-A DRS07/004-A DRS07/006-A DRS07/010-A DRS07/016-A DRS07/025-A DRS07/032-A DRS07/040-A DRS07/050-A DRS07/063-A DRS07/075-A DRS07/100-A Vmax = 7.2 kv DRS07/002-A DRS07/004-A DRS07/006-A DRS07/010-A DRS07/016-A DRS07/025-A DRS07/032-A DRS07/040-A DRS07/050-A DRS07/063-A DRS07/075-A DRS07/100-A DRS07/100-B DRS07/125-B DRS07/160-B DRS07/200-B DRS07/250-B DRS07/315-B DRS07/400-B DRS07/500-B Vmax = 12 kv DRS12/125-B DRS12/160-B DRS12/200-B HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-6

68 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Fuses with striker pin for transformer, motor and overhead lines and cable feeders protection. INTERRUPTING MINIMUM RATED CAPACITY INTERRUPTING DIMENSIONS WEIGHT TYPE CURRENT I n I 1 CURRENT I 3 e L 1 2 approx. A ka A mm mm mm mm kg Vmax = 38 kv DRS30/002-A DRS30/004-A DRS30/006-A DRS30/010-A DRS30/016-A DRS30/025-A DRS30/032-A DRS30/040-A DRS30/050-A DRS30/063-A DRS30/075-B DRS30/100-B Fuses without striker-pin for potential transformer protection: Vmax = 7.2 kv DRN07/001-A1R DRN07/002-A1R DRN07/004-A1R DRN07/001-A DRN07/002-A Vmax = 13.8 kv DRN13/001-A1R DRN13/002-A1R DRN13/004-A1R DRN13/001-A DRN13/002-A Vmax = 23 kv DRN20/001-A2R DRN20/002-A2R DRN20/004-A2R DRN20/001-A DRN20/002-A Vmax = 38 kv DRN30/001-A4R DRN30/002-A4R DRN30/004-A4R DRN30/001-A DRN30/002-A ❶ Real rated current is determined applying a factor of 90% over the value given in the table, for instance, a 400 A fuse, 400 x 0.9 = 360 A HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-7

69 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE DUAL VERSION. Fuses with striker pin for transformer, motor and overhead lines and cable feeders protection. INTERRUPTING MINIMUM RATED CAPACITY INTERRUPTING DIMENSIONS WEIGHT TYPE CURRENT I n I 1 CURRENT I 3 e L 1 2 approx. A ka A mm mm mm mm kg Vmax = 4.8 kv Length 1 (192 mm) DRS04/250-B DRS04/315-B Length 2 (292 mm) DRS04/400-B DRS04/500-B DRS04/630-B Vmax = 7.2 kv Length 2 (292 mm) DRS07/125-A DRS07/150-A DRS07/200-A Length 4 (442 mm) DRS07/315-B DRS07/400-B DRS07/500-B DRS07/630-B Vmax = 12 kv Length 2 (292 mm) DRS12/250-B DRS12/315-B DRS12/400-B Vmax = 13.8 kv Length 2 (292 mm) DRS13/125-A DRS13/150-B DRS13/200-B Vmax = 17.5 kv Length 4 (442 mm) DRS15/250-B DRS15/315-B DRS15/400-B Length 5 (537 mm) DRS15/400-B Vmax = 25.8 kv Length 4 (442 mm) DRS20/200-B DRS20/250-B DRS20/315-B Length 5 (537 mm) DRS20/250-B DRS20/315-B Vmax = 38 kv Length 5 (537 mm) DRS30/125-A DRS30/150-B DRS30/200-B HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-8

70 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Fuses without striker-pin for capacitor protection: INTERRUPTING MINIMUM RATED CAPACITY INTERRUPTING DIMENSIONS WEIGHT TYPE CURRENT I n I 1 CURRENT I 3 e L 1 2 approx. A ka A mm mm mm mm kg Vmax = 4.8 kv DRK04/125-B DRK04/160-B DRK04/125-B DRK04/160-B DRK04/200-B DRK04/250-B DRK04/315-B Vmax = 7.2 kv DRK07/004-A DRK07/006-A DRK07/010-A DRK07/016-A DRK07/025-A DRK07/032-A DRK07/040-A DRK07/050-A DRK07/063-A DRK07/075-A DRK07/100-A Vmax = 7.2 kv DRK07/006-A DRK07/010-A DRK07/016-A DRK07/025-A DRK07/032-A DRK07/040-A DRK07/050-A DRK07/063-A DRK07/075-A DRK07/100-A DRK07/100-B DRK07/125-B DRK07/160-B DRK07/200-B DRK07/250-B DRK07/315-B DRK07/400-B DRK07/500-B Vmax = 12 kv DRK12/125-B DRK12/160-B DRK12/200-B HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-9

71 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Fuses without striker-pin for capacitor protection: INTERRUPTING MINIMUM RATED CAPACITY INTERRUPTING DIMENSIONS WEIGHT TYPE CURRENT I n I 1 CURRENT I 3 e L 1 2 approx. A ka A mm mm mm mm kg Vmax = 13.8 kv DRK13/004-A DRK13/006-A DRK13/010-A DRK13/016-A DRK13/025-A DRK13/032-A DRK13/040-A DRK13/050-A DRK13/063-A DRK13/075-B DRK13/100-B Vmax = 17.5 kv DRK15/006-A DRK15/010-A DRK15/016-A DRK15/025-A DRK15/032-A DRK15/040-A DRK15/050-A DRK15/063-A DRK15/075-B DRK15/100-B DRK15/125-B DRK15/160-B DRK15/200-B DRK15/200-B Vmax = 25.8 kv DRK20/004-A DRK20/006-A DRK20/010-A DRK20/016-A DRK20/025-A DRK20/032-A DRK20/040-A DRK20/050-A DRK20/063-A DRK20/063-B DRK20/075-B DRK20/100-B DRK20/125-B DRK20/160-B DRK20/125-B DRK20/160-B HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-10

72 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Fuses without striker-pin for capacitor protection: INTERRUPTING MINIMUM RATED CAPACITY INTERRUPTING DIMENSIONS WEIGHT TYPE CURRENT I n I 1 CURRENT I 3 e L 1 2 approx. A ka A mm mm mm mm kg Vmax = 38 kv DRK30/004-A DRK30/006-A DRK30/010-A DRK30/016-A DRK30/025-A DRK30/032-A DRK30/040-A DRK30/050-A DRK30/063-A DRK30/075-B DRK30/100-B FOR MECHANICAL AND ELECTRICAL SPECIFICATIONS, SEE SECTION I OF CATALOG. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-11

73 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Fuse selection chart for transformer protection: 1.- Determine the system voltage in kv. 2.- Determine the transformer power in kva. 3.- Find the rated current of the fuse (In) on the table below, in the intersection of the voltage column and the transformer power row. Pow er Operation voltage in kv in kva Comments Serie 07 Serie 15 Serie 20 Serie Fuse without striker-pin (1and 2 A) Standard Fuse w ith striker-pin (from 2 Amp) x One fuse 1500 == per-phase 2000 == 2x == == 2x x == == == 500 2x160 2x160 2x == == == 2x315 2x200 2x160 2x160 2x125 2x100 2x100 2x63 2x63 Tw o fuses 5000 == == == == == == 2x200 2x200 2x160 2x125 2x100 2x100 per-phase 7500 == == == == == == == == == == == == Circuit-breaker == == == == == == == == == == == == required Rated fuse current (In) in Amperes 4.- For cases not considered in the table, calculate the fuse rated current using the formula below: In = x kva. kv 5.- Choose the next higher current rating from the table below: Standardized fuse current ratings (In) Serie 30: kv Serie 20: kv Serie 15: kv Serie 07: kv 6.- Consult the fuse Selection Charts and determine the corresponding type. 7.- For further details consult Technical Bulletin 201. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 I-12

74 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE FIGURE 8 DRIWISA fuses time-current characteristic curves. For fuses from 1 to 6 A HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-13

75 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE FIGURE 9 DRIWISA fuses time-current characteristic curves. For fuses from 6 to 500 A HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-

76 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE FIGURE 10 DRIWISA fuses I 2 t characteristic curve for operation times less than 0.1 sec HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-15

77 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE RATED CURRENT (A) MAXIMUM RATED VOLTAGES (kv) TABLE 1 DRIWISA current-limiting fuses manufacturing program DESIGN AND CONSTRUCTION: The fuse design ponders on a several compartments system or series of arcing chambers, where the voltaic arc produced by the fusion and/or evaporation of the fuse link is quenched. Fuse links, formed by one or several 99.9 % pure silver strips, are uniformly wound over a star shaped strip-holder (star-shaped body) built out of steatite (a ceramic material with great mechanical and thermal resistance), in agreement to every particular fuse design. Due to its tooth edges design, the star-shaped body guarantees the fuse link safe and firm position. Together the star-shaped body and the fuse links are put into a porcelain tube which sets up the fuse cilindric body, thus forming the series of arcing chambers (Figure 1). In every one of these arcing chambers a part of the voltaic arc produced by the fusion and/or evaporation of the fuse link when a short-circuit occurs, is started, developed and quenched. This process is described farther on. Therefore the fusion and interrupting process is carried out without the influence of external factors. Fuse links have a group of precision holes regularly spaced lengthwise, calibrated in agreement to each fuse feature, which constitutes a reduction in the conduction cross-section. When a short-circuit current is flowing, it is in these zones where the elements fusion is produced and the voltaic arc during the first part of the current wave is established. Type and number of parallel connected silver strips depend of the fuse rated current. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-6

78 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE According to the above mentioned, the uniform distribution of the voltaic arc and the resulting voltage of the fuse operation is assured. The high interrupting capacity and the rated current wide range available, are mainly the result of these design features which allow the dissipation of the thermic energy generated during the fusion and/or evaporation process in a uniformly distributed shape. The fuse is filled with silica sand of specific granulometry and formulation, thus providing the proper environment for voltaic arc cooling and quenching through the absorption and dissipation of the generated heat and condensation and solidification of the evaporated metal. DW-2009 DRIWISA fuse before and after a short-circuit current interruption Figure 2 shows a fuse after it has operated, where the melted strip elements in each chamber, uniformly distributed and parts of intact strips in the transition points from one chamber to another can be seen. The voltaic arc starts in the middle of each chamber where the thicker melted elements are found. They become thinner at the same time as they get closer to the walls that separate one chamber from another, showing the interrupting characteristic in a distributed shape. Intact strip residues at the transition points indicate the availability of an additional fuse interrupting capacity. Fuse ends have silver coated electrolitic copper caps which are connected inside to the silver strips ends. DRS and DRS...F types have a mechanic indicator which operates through a stored energy system in a preloaded spring mechanism with a striker pin that emerges by one fuse end when the fuse blows out with a force of 120 N (12 Kg-force) and a travel of 35 mm. In accordance with IEC standard classifications, the striker pin features of DRIWISA fuses place it as heavy duty (strong) type. Exhaustive tests have demonstrated that it is capable of activating the DRIWISA disconnector switch quick make mechanisms even in critical conditions, such as a blocked mechanism after a long period of time without operation, overcoming friction and resistance caused by the presence of dust, dirtiness, rust on hinges or lack of lubrication. Figure 3 shows the mechanic indicator force-displacement characteristic. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-7

79 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE FIGURE 3 DRIWISA fuse before and after a short-circuit current interruption DRIWISA fuses work satisfactorily in any mounting position. In every case epoxy-resin is used as a seal between the caps and the porcelain tube, to assure great resistance and long life sealing, waterproof and resistant to most severe and extreme atmospheric conditions. For outdoor fuses, additionally a special welding between the caps and porcelain tube is used to offer an optimum sealing. At facilities with high degree of humidity, coastal, tropic or rainy zones, it is recommended to use outdoor fuses (type DRS...F) even when installed in interiors. In regard to their electrical, dimensional and mechanical characteristics (diameters, lenghts, striker pin operation force, etc) DRIWISA fuses are manufactured in accordance with international standards. For further details, consult the catalog Selection Guide (Section I) which contains the specifications and mechanical and electrical data. OPERATION: OPERATION PRINCIPLE: When a short-circuit condition occurs in an electric network, very appreciable thermic and dynamic effects are produced because of the high current values. The interruption of these currents in the shortest time possible is very important, since the damages produced by overheating of conducting parts and by dynamic stresses must be avoided or at least minimized. Current-limiting and high interrupting capacity fuses are used as protection against short-circuit currents. The importance falls on the current-limiting effect, which is the fuse capacity to interrupt a short-circuit current before it reaches its maximum peak value by limiting the value of I D to the breaking current or fusion current I S. This is considerably less than the non-limited short-circuit current (prospective current) I k " shown in Figure 4 with a dotted line and which corresponds to the short-circuit current available at the point where the fault occurs. Figure 4 shows the current and voltage behavior during a short-circuit current and the interrupting process. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-8

80 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE I k " I S I D I D = I S t S t L short-circuit prospective current (in case that fuse does not exist) (rms value) fusion current (peak value) let-through current (peak value) short-circuit current limited by the fuse prearcing time (fusion time) arcing time FIGURE 4 Short-circuit current interrupting process in a current-limiting fuse When the short-circuit begins, a minimum resistance opposes the flow of the current I D thus increasing at the same time the current I k " and starting the temperature elevation process in the fuse link (silver strips). When they reach the I S value, (fuse breaking current or fusion current) the fuse link melts and/or evaporates and interrupts the circuits on several points, with multiple voltaic arcs showing up, whose length increases quickly with the material melting and/or evaporating. Voltage increases rapidly from the moment of the fusion, reaching a maximum (interruption voltage) and the current is limited to the I S value. At this moment a current decreasing process begins. The limiting process is therefore the result of the insertion of the voltaic arcs resistance at several points from the fusion. When arcs turn cold by effect of the surrounding sand consequently the conductivity is reduced and therefore, the resistance to the current flow increases quickly. The current decreases gradually at the same time as the voltage. Near to the next pass through voltage zero, the voltaic arcs are extinguished and the current remains totally interrupted. The described events occur within the first half cycle of the short-circuit current, meaning, in less than 8 to 10 milliseconds. Formation of multiple voltaic arcs at the fuse length as a consecuence of DRIWISA fuses special design gives a uniform voltage distribution as result as well as of and the great amount of energy (heat) produced during this short process, thus preventing the posibility of arc reignition. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-9

81 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Figure 5 shows DRIWISA current-limiting fuses characteristic indicating the let-through current maximum value I D (equal to the fusion current I S ) with regard to the prospective short-circuit current rms value ( I k " ) for fuses from 6 to 500 A. FIGURE 5 Maximum let-through current I D refered to the short-circuit prospective current I k " Line A-A' represents the maximum asymmetrical peak current that would show up in the circuit for every value of the symmetrical short-circuit prospective current I k " (rms value) in case a fuse would not exist. The value of 1.8 x 2 corresponds to the maximum asymmetric value possible in the network for the first phase to interrupt, which represents the most critical condition. The lines corresponding to every fuse rated current show the maximum let-through current I D (which corresponds to the fusion current I S ) in relation to the short-circuit prospective current I k " (rms value). For example, for a short-circuit prospective current of I k " = 20 ka rms a let-through current I D = 1.8 x 2 x 20 ka = 50.9 ka peak would show in case a currentlimiting fuse would not exist. With a 32 A fuse this value is limited to only I D = I S = 4 ka peak within an operation time lower than 10 milliseconds (figure 7). It is obvious that for low currents, for which the fusion time is long (including times over one cycle) the fuse does not act as a current-limiting fuse. Fuses will show their current-limiting characteristic only from a current value where I Dpeak is the same as I S. Starting at this level of current, the fuse will operate as a current-limiting fuse (on the right side of the A-A' line in Figure 5). The point where the line corresponding to I S of every fuse meets with the A-A' straight line, defines over the abscissa (X axis) the short-circuit current value as of which the fuse operates as current-limiting. If the short-circuit current is lower, the fuse will not operate as a current-limiting one. For example, a 75A fuse will operate as a current-limiting fuse as of approximately 2000 A of short-circuit. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-10

82 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE RATED CURRENT (I n ): The fuse rated current is the maximum current value that the fuse can conduct for indefinite time without reaching fusion and the one to generate an energy such as the fuse can satisfactorily dissipate. INTERRUPTING CAPACITY ( I 1 ) (MAXIMUM INTERRUPTING CURRENT) : The interrupting capacity (maximum interrupting current) I 1 corresponds to the maximum short-circuit current that a fuse is capable of interrupting safely lying of the neighborhood of several tenths of ka. The interrupting capacity (maximum interrupting current) of DRIWISA fuses lies above the short-circuit currents usually available in electric networks. Nevertheless it is recommended to verify the short-circuit current of the network when selecting a fuse. The corresponding Selection Guides specify the maximum interrupting current and the interrupting capacity (MVA) for each type of fuse. When the short-circuit power instead of the short-circuit current is specified, the ratio between them is deduced from the following formula: MINIMUM INTERRUPTING CURRENT ( I 3 ): P short-circuit = kv net x kashort-circuit x 3 For values above I n fusion times are very long and they decrease at the same time the current increases (Figure 6). In this range, heat dissipation capacity is lower than the amount of heat generated inside. Therefore severe thermic stresses that may damage the fuse show up. While the current increases, the fusion times are reduced, until a point is reached where the fusion occurs in a relatively short time, before thermic stresses and damages to the fuse show up. This current value is called the minimum interrupting current I3 and corresponds to the lower limit of current ranges that the fuse may satisfactorily interrupt. FIGURE 6 Characteristic time-current curves for current-limiting fuses Considering the above, time-current curves define a minimum interrupting current value ( I 3 ) for each fuse type, below which an operation during a long period of time is not recommended, since the current (overcurrent) does not have the magnitude high enough to produce fusion, but produces an excessive heating, modifying the fuse links characteristics and producing thermic damages to the fuse body. Therefore current-limiting fuses must not operate during long periods of time in the range of currents higher than the rated one ( In ) and lower to the minimum interrupting current ( I 3 ). However, in case of high currents ( higher to I 3 ), that is within the short-circuit current range, the fuse operation is quick, defined and predictible. Figure 7 shows - in a graphic way - the different fuse operation zones and the conditions and limitations of each one. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-11

83 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Even though the fusion process is based on known physical principles and laws, when currents higher than I n (overcurrents) show up during a time greater than the reply time corresponding to I 3 (t I3 ) or overcurrents of an intermittent type, there are difficulties in analysing and evaluating, because the behavior of the fuse will depend on their magnitude and duration, as well as on the periods between these overcurrents, during which the fuse is able to return to a normal regime or even to the cool condition. If an overcurrent lasts a relatively long time and then stops, it can start fusion or reach the amalgamating condition with a rise in temperature because of energy disipation during that period of time, changing in a significant way the fuse links characteristics. When later found subject to a new overcurrent regime or shortcircuit, the fuses will react in a different way as to the standard characteristic, producing first heatings or inexplicable interruptions and then a reaction completely out of specification. Consulting Figures 8 and 9 which show DRIWISA fuses time-current characteristic for the range of available rated currents in the manufacturing program, it can be seen that the minimum interrupting current I 3 (begining at the dotted line) for fuses with rated currents up to 63 A, is about 2.5 times higher than the fuse rated current I n. For rated currents larger than 63 A, the minimum interrupting current I 3 is about 3 times the fuse rated current I n, while for fuse rated currents of 200 A and higher it corresponds to 4 times the rated current I n. RATED CURRENT SELECTION ( I n ): To avoid fuse operation within the overload range, the fuse rated current I n is selected with an overdimensioned factor according to the equipment to protect, which for example, in case of transformers lies between 1.6 and 2 times the circuit rated current. This way the fuse will be able to hold up with the magnetization currents (inrush) and even if the transformer works within an overload regime, the fuse will not be exposed to such, due to the transformer higher thermic capacity. Appling this factor it will be possible to coordinate protection with other devices such as overcurrent relays, phase fault relays and protection elements on the low voltage side, for example, fuses, thermomagnetic switches and other protections. Any current higher than I 3, will be interrupted in a time no longer than 10 to 100 sec., according to the corresponding curve in Figures 8 and 9. For further information regarding transformer protection, refer to Technical Bulletin 201. In regard to motor protection similar criteria are followed as described in Technical Bulletin 202, while capacitor protection is explained in Bulletin 203. For overhead lines or underground cables it is reccomended to consult Bulletin 204. TIME-CURRENT CHARACTERISTIC CURVES: FIGURE 7 Current-limiting fuses operation zones Graphics in Figures 8 and 9 correspond to DRIWISA fuses time-current performance and represent the response curves under cool condition, without previous load (preloading), at surrounding temperature of 20 C, with a tolerance margin of + 20%, for operating times larger than 0.01 sec. Graphics in Figure 10 correspond to the I 2 t characteristic (Joule integral) applicable for operating times lower than 0.1 sec. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-12

84 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE The tight tolerance in the fuse links lineal resistance and a strict quality assurance during the manufacturing process guarantee the characteristic curves repeatibility. Applying the overdimensioning factors and following the selection criteria in agreement with the different applications, there is little probability of overloading of the fuse due to values lying above the rated current I n to occur. However, in accordance with the knowledge of the net, if the risk probability is high, the protection against overloads with currents larger than I n but smaller than I 3 during longer periods of time, should be provided by other means, such as overcurrent relays connected to disconnection devices like switches or load-break disconnectors. For further details consult Technical Bulletin 302. The oscillogram in Figure 11 shows the current characteristic performance and the voltage during a short-circuit interruption when a DRIWISA fuse type DRS07/100-A2 with 12 kv rated voltage and 100 A rated current subjected to a short-circuit prospective current of I k " = 63 ka rms is used. The current-limiting effect can be deduced when observing that the maximum let-through current I D reaches a value of 15 ka peak corresponding to the fuse fusion current I S, while the current that would have flown in the test circuit, replacing the fuse by a very low resistance conductor, would have reached a value of ka peak of the maximum asymmetrical peak current ( 1.8 x 2 x 63 A = ka peak ). Ve I P I D I D = I S Recovery voltage Short-circuit prospective current (rms value) Maximum let-trough current Breaking curent (fusion current) FIGURE 11 Interruption of a 63 ka rms short-circuit current when a fuse type DRS07/100-A2 is used In accordance with international standards, recovery voltage at a system frecuency (V e ) is 87% of the fuse maximum rated voltage (V O ). Therefore, in the example shown in Figure 11 the result is: V e = 0.87 x V o = 0.87 x 12 kv = 10.5 kv HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-16

85 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE OPERATION VOLTAGE ( V n ): The interrupting voltage or maneuver voltage generated during the arc extintion process, by inserting its high resistance and interrupting currents with a high grade of inductance, is of special interest. Transient voltage during interruption must not exceed the insulation levels, usually coordinated in the network, since it would provoke trouble mainly at the insulation of other components of the system, among others, at arresters placed on the line side. For this reason it is important to use fuses with a rated voltage in agreement to the network voltage. When using a fuse with less rated voltage in regard to the network voltage, problems to manage the voltage gradients will present, while using one with greater rated voltage and consequently greater interruption voltage would cause a higher voltage gradient and consequently would create problems with the insulation of other equipments in the system. In multiple tests accomplished on DRIWISA fuses, the highest arc interruption voltage value found was of V U = 1.95 x 2 x V O = 2.76 x V O. This value is considerably lower than those admitted by the standards (Table 2). Consequently, using fuses with rated voltages corresponding to network voltages, there is no danger of provoking damages to the insulation of equipments connected to the load side, such as transformers, switches, substations, motors, etc. and avoiding the arresters operation. Table 2 lists the maximum arc interruption voltages admissible for high voltage fuses in accordance with international standards. FUSE RATED SYSTEM RATED MAXIMUM MANEUVER VOLTAGE VOLTAGE (MEXICO) VOLTAGE ❶ kv rms kv rms kv peak ❶ Also defined as maximum interruption voltage TABLE 2 Maximum interruption voltage levels corresponding to the fuses rated voltage DRIWISA fuses can be installed in three-phase networks whose service voltage does not exceed the fuse rated voltage. In one-phase networks the service voltage must not be larger as 87% of the fuse rated voltage. In other cases, fuse voltage selection must be such that the maximum interruption voltage (maneuver voltage) does not exceed the maximum voltages established for the network (see Table 2). APPLICATION WITH LOAD-BREAK DISCONNECTOR SWITCHES: Using current-limiting fuses in combination with DRIWISA load-break disconnector switches, three-phase group operated with automatic and auxilliary trip type LDTP, an economical and reliable connection and disconnection equipment is obtained. In this case, minimum interrupting current values I 3 may be considered lower ( from 1.8 to 2 times the fuse rated current I n ). This is because of the premature reply of the fuse striker pin, which in case of being used within load-break switches, provokes the tripping of the auxilliary mechanism and the simultaneous opening of the three phases. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-17

86 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE This way, when the first fuse acts, the disconnector switch operates opening the three poles, interrupting the current of the remaining phases that otherwise would not have been interrupted but until the respectives fuses had acted maybe after several minutes or even hours, subjecting them to thermic stresses and eventually producing damages to the protected equipment, also preventing a two-phase operation. During the interruption of the remaining phases, the disconnector switch is not subject to large stresses because it just has to interrupt the rated load current of the net voltage. In case that some of the other fuses would have started its fusion process, the disconnector switch will only have to deal with the small arcing currents, thus remaining the fault disconnected and isolated. In accordance with international standards, for the extreme condition of operating an unfused load-break switch an inductive power factor = 0.7 (cos φ = 0.7) is specified. However, under short-circuit conditions at the transformer secundary terminals for instance, the value of cos f can be considerably lower, around 0.1. Nevertheless when using a combination of fuses with a DRIWISA load-break switch disconnector, this last will just have to disconnect a much lower current value due to the fuse current-limiting characteristic and with a power factor within its rated range, thanks to the high arc resistance of the fuse. The utilization of fuses with striker pin in combination with load-break disconnector switches is recommended for its excellent features and behavior in case of short-circuits at transformer secundary terminals. This is the reason why many electric utilities around the world use and specify DRIWISA fuses with striker pin to operate within three-pole load-break disconnector switches. ADVANTAGES: DRIWISA high interrupting capacity fuses guarantee a safe operation even for networks with a high short-circuit power. Their current-limiting characteristic guarantees the reduction to a minimum of damages to the network and other equipments, that could originate because of dangerous short-circuit currents dynamic and thermic effects. Because of their relatively slow time-current characteristic, DRIWISA fuses used for transformer or motor protection do not show untimely fusion or fuse link degradation if they are selected accordingt to the corresponding recommendations. Fuses are sealed with epoxy resin to achieve great airtightness against humidity. For outdoor use fuses, a special welding between covers and caps is used in order to offer a perfect protection against humidity. Costs savings when the same fuses can be used in networks that have increased their short-circuit power. DRIWISA fuses are recyclable and can be repaired with the original manufacturer guarantee by DRIESCHER Y WITTJOHANN, S.A. DRIWISA fuses are manufactured in a wide range of operation currents and voltages to satisfy any necessity. DRIWISA fuses are standardized in dimensions which makes the selection and replacement easy. USE AND HANDLING PRECAUTIONS: The following precautions must be taken into consideration when handling and using fuses: - Water or humidity must not penetrate into the fuse, since the high temperatures that are reached when fusion takes place, will provoke the abrupt generation of steam which causes the possibility of an explosion. - Handling fuses with precaution, avoid breakage of the porcelain and the caps to get dented. If this happens, DO NOT USE THE FUSE, AS SERIOUS RISK OF DAMAGES, HAZARDS OR INJURIES MAY OCCUR. - Fuse copper caps are silver-plated to give them excellent conductivity and assure a good electric contact. DO NOT USE SANDPAPER OR FIBER TO CLEAN THE CAPS IF THEY ARE DIRTY OR IF THEY HAVE TURNED BLACK, since this does not affect their electric conductivity features. Use a soft cloth lightly wet with silver cleaning solution not containing any abrasive or agressive materials. - Do not place metallic or metallized labels on the fuse body, since this may provoke an external flashover, as the dielectric distance along the air between the caps is reduced. - Fuse repair or rehabilitation must be done by skilled and responsible personnel; they must know about the operation principles and electrical phenomena, and must have the technical ability, skills, equipment and technology to perform these activities. DRIWISA fuses can be repaired renewing their original guarantee only by DRIESCHER Y WITTJOHANN, S.A. or they can be exchanged through Authorized Distributors or Service Centers. - When buying or repairing fuses, consider the equipment, installations and personnel value they are protecting and remember that "THE CHEAPEST MAY BE THE MOST EXPENSIVE". Entrust your installations and personal safety to DRIWISA fuses. - Even when just one fuse had operated after a short-circuit condition in a three-phase system, it is necessary and very advisable to replace the set of three fuses since the unblown fuses may have inside damage if the fusion process (pre-arcing) had begun, this will cause later problems such as inexplicable temperature rise or undesirable interruption. This recommendation is also contained in international standards. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-18

87 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE TRANSPORTATION AND STORAGE: During transport of DRIWISA fuses avoid strikes that can break or crack the porcelain fuse body or dent the caps. In case of indoor service fuses, do not allow them to get wet or to stay in humid enviroments to avoid the penetration of moist. When receiving new fuses, inspect them before storage, informing the Authorized Distributor or the factory of any problem. Fuse storage must be done in a closed, cool and dry place. Do not store them in places where there are vibrations, moist or pollution. Keep the fuses inside their original package on a shelf in order to be safe against falling and do not stack more than 5 boxes. MAINTENANCE: DRIWISA high voltage and high interrupting capacity fuses do not require any maintenance. However it is recommended that after the fuse operation in a three-phase system, to replace the set of three, even when only one fuse has blown, since the others could have been subjected to thermic stresses that may caused them damages and then cause later problems such as inexplicable temperature rise or unexpected interruptions without any suitable cause. In cases of high or prolonged overloading in the circuit protected by fuses, it is recommended these being verified as to its features in factory or with any Authorized Distributor or Service Center besides to have been subjected to overcurrent, they may have suffered irreversible thermic damages that modify and demote its original characteristics. It is advisable in all cases to be equipped with a set of at least 3 fuses as spare for emergency cases. These fuses must be of the same characteristics to those installed. Keep them following the instructions given in the section "transportation and storage". Fuse copper caps are silver-plated to give them excellent conductivity and assure a good electric contact. Do not use sandpaper or fiber to clean the caps if they are dirty or if they have turned black, since this does not affect their electric conductivity features. Use a soft cloth lightly wet with silver cleaning solution not containing any abrasive or agressive materials. Do not place metallic or metallized labels on the fuse body, since this may provoke an external flashover, as the dielectric distance along the air between the caps is reduced. Fuse repair or rehabilitation must be done by skilled and responsible personnel; they must know about the operation principles and electrical phenomenon, and must have the technical ability, skills, equipment and technology to perform these activities. DRIWISA fuses can be repaired renewing their original guarantee only by DRIESCHER Y WITTJOHANN, S.A. or they can be exchange through Authorized Distributors or Service Centers. INSTALLATION AND/OR REPLACEMENT: It is recommended to follow the following instructions when placing or replacing fuses: A) ACCOMPLISH THE SAFETY PREPARATIONS: 1) Use special pliers for the handling of high voltage fuses ( brand DRIWISA type DW-018) 2) Use insulating gloves properly guaranteed for use in high voltage. 3) Use a headpiece made of insulating material. 4) Have ready cable, hook stick and equipment to connect to ground. 5) Have ready a sand bed where fuses can be placed. 6) In front of the equipment which contains the fuses, place an insulating platform for high voltage or a wood platform with an insulating rug and stay above it all the time the operation lasts, even more if the environment is humid. 7) If working in branch circuits or remote substations, place placards in the main substation or switch where it let knows that someone is working there "DO NOT CONNECT" " MEN WORKING...". B) THINK FIRST AND THEN ACT, remember that when working with high voltage, the FIRST MISTAKE may be THE LAST ONE. 8) Disconnect the high voltage supply: 8.1) Be sure that the main load-break disconnector or main switch is open. If not, open it. 8.2) Open the non load-break isolator. 8.3) Connect the ground switch ( in case of having this kind of equipment). 9) Open the door cabinet; stay strategically where the door does not hit you, nor get projections from inside. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-19

88 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE PRECAUTION: FUSES MAY REACH HIGH TEMPERATURES SO THAT WHEN THE CABINET DOOR IS OPENED, THEY CAN RECEIVE A THERMAL IMPACT, THAT MAY CRASH AND/OR MAKE EXPLODE THE PORCELAIN TUBE. THEREFORE LET THE FRESH AIR ENTER SLOWLY. 10) Connect the ground cable; use the correct size of cable and a hook stick. Connect it first to the substation or switchgear ground bus or grounding structures and then to the phases (in case of not having a ground switch integrated to the equipment). 11) Find out and determine the cause that made the fuse blow, it can be a short-circuit or an overload. Eliminate the trouble, remove the remains and make a general cleaning. 12) Verify the condition of equipment and installations. 13) Inspect the new fuses and make sure they do not show maltreatment, cracks or fissures, check that the porcelain tube is not broken, grooved or scratched, nor the caps are dented or plunged. If some things mentioned before would happen, do not use them since their use is very risky. Verify that the fuse striker pin is brought back and is in its place. ) Fuse copper caps are silver-plated to give them excellent conductivity and assure a good electric contact. DO NOT USE SANDPAPER OR FIBER TO CLEAN THE CAPS IF THEY ARE DIRTY OR IF THEY HAVE TURNED BLACK, since this does not affect their electric conductivity features. Use a soft cloth lightly wet with silver cleaning solution not containing any abrasive or agressive materials. Do not place metallic or metallized labels on the fuse body, since this may provoke an external flashover, as the dielectric distance along the air between the caps is reduced. 15) Remove the old fuses with pliers DW-018 and replace them for DRIWISA fuses of the same characteristics: Type, rated voltage and rated current. Never use fuses of different brands in the same circuit or different type, rated voltage or current even if they're of the same brand, since their characteristics are not the same. In three-phase systems it is recommended to replace the set of three fuses even when only one had blown since the others may be damaged and cause problems later. PRECAUTION: FUSES MAY STAY HOT, PLACE THEM ON THE SAND BED, LETTING ENOUGH TIME PASS BEFORE TOUCHING THEM WITH BARE HANDS. 16) If the fuses are installed in load-break disconnectors, verify the operation of the auxiliary trip mechanism. 17) Place the new fuses carefully, making sure the clips assemblies make the proper contact with the fuse caps. When inserting the fuses in the clip assemblies, make pressure on the ends and not on the middle of the fuse. Do not hit the fuse. 18) Remove all the tools that have been used and verify that are complete and it has not stayed behind anything inside the cabinet. 19) Disconnect the grounding switch or the ground connections, wherever it is the case. 20) Close the cabinet door, connect the non-load isolator switch and connect the high voltage supply. 21) Replace damaged fuses for new fuses, of the same rated voltage and current. In some cases, when the fuse operation is because of overloads, verify the load calculations and if necessary ask for three new fuses at the adecuate rated current according to the new calculation. DRIWISA fuses can be repaired including their original guarantee only by DRIESCHER Y WITTJOHANN, S.A. or they can be exchanged through Authorized Distributors or Service Centers. Fuse repair or rehabilitation must be done by skilled and responsible personnel; they must know about the operation principles and electric phenomena, and must have the technical ability, skills, equipment and technology to perform these activities. Do not expose installations, equipments and own security. SELECTION: When selecting current-limiting fuses always consider the following factors: - Network rated voltage - Interrupting capacity - Installation altitude - Fuse rated current, according to application - Coordination with other protections - Type of service (indoor or outdoor) - Dimensions - Availability of spare, service and technical assistance - Security and reliability : always use DRIWISA fuses HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-20

89 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE Fuse selection must be done in agreement to the equipment to protect, since the selection criteria are different for each application. For further information consult additionally the following information which is included in section J: TECHNICAL BULLETIN No. C O N T E N T S 201 Recommendations for protection with current-limiting fuses: TRANSFORMERS. 202 Recommendations for protection with current-limiting fuses: MOTORS. 203 Recommendations for protection with current-limiting fuses: CAPACITORS. 204 Recommendations for protection with current-limiting fuses: OVERHEAD LINES AND CABLE FEEDERS. 205 Considerations and criteria for the parallel-connection of fuses (two-per phase arrangement). 206 Equivalency between DRIWISA fuses and american fuses type "R" and "E". 302 Shunt-trip coil for electrical remote control. 304 Selection of non-load break isolator switches and load-break disconnector switches with fuse-holders. Selectivity and coordination of protections is reached by keeping a rate of 1 : 1.6 between fuse rated currents, being the smallest the one connected closest to the load and the biggest the one connected from the supply side, assuring this way that the smallest blow first, interrupting and isolating the fault. In case of transformer protection, to establish selectivity and coordination with protections on the low voltage side it is necessary to refer to the high voltage fuses time-current characteristic curves and to the curves of the devices and/or fuses of the low voltage side (for further information refer to Technical Bulletin 201). Sometimes, for big transformer protection, it is necessary to appeal to a two-per-phase fuse arrangement to reach the required rated current value. For these cases it is recommended to consult Technical Bulletin 205 before deciding on this arrangement. For motor protection it is required to know the starting time, the maximum starting current, and the motor startings frecuency to select the correct fuse. It is recommended to consult Technical Bulletin 202. Capacitor and capacitor-bank protection invest special importance, because of the increasing use they have to keep the power factor within the acceptable limits and the relative rank of difficulty for its adequate protection, since connection currents reach, in many cases, levels very close to those of short-circuit. For further information consult Technical Bulletin 203. For fuse selection for overhead lines and cable feeders, the selection criteria are described in Technical Bulletin 204, considering that it must be done in function of the transversal section and the admissible current in the conductor. In the fuse selection for networks and circuits with high probabilities of long duration or high overloadings which require therefore of fuses with high currents rates, it is reminded that these must be used for protection against short-circuits and not for protection against overloading. Requeriments for specific arrangements in networks have to be calculated in detail by the customer to control and/or verify the continuous load regime over the fuses, the interruption current, and the fuse interrupting capacity. All data corresponding to voltage, current, interrupting capacity given in this Manual and/or Selection Guides of Catalogs, Technical Bulletins, etc., are refered to installation heights up to 1000 m over sea level and an enviroment temperature up to 40 C. In any way, once selected the correct fuse for its application, consider the installation altitude correction factors included in Table 3, in the fuse rated current as in the interrupting capacity and rated voltage reduction. If it is calculated with the correction by altitude in the rated current, do not use the temperature rising correction and viceversa. In some cases, a temperature correction factor should be additionally considered, in those cases in which the fuses are installed inside of cabinets or switchboards with little ventilation and/or high temperatures, in accordance with Table 4. When there exist several sizes of fuses for a specific rate of current, it is advisable to consider the future installation growth (greater rated current) or the increase of short-circuit capacity, this means to verify if for the selected fuse size exist larger rated currents or interrupting capacities, in such a way that when selecting them it is chosen a size that allows to increase the capacity, by means of just changing fuses by others of greater current or interrupting capacity when this growth requires it. Bulletin 206 establishes equivalency criteria between american fuses curves type "R" y "E" and DRIWISA fuses curves. Fuses must have a rated voltage equal or greater to the system highest voltage between phases, when they are used in three-phase systems with neutral firmly grounded or with neutral connected through an impedance or resistance. When using fuses in systems with isolated neutral (not grounded), the rated voltage should be at least 1.15 times the system highest voltage between phases. When fuses are used in one-phase systems, its rated voltage should be at least 1.15 times greater than the voltage between phase and ground. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-21

90 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE CORRECTION FACTORS BY INSTALLATION ALTITUDE AND TEMPERATURE: Installation altitude Correction factor Correction factor Correction factor (meters over sea level) for rated current for voltage and for temperature interrupting capacity rising 0 a a a a a a a a a a TABLE 3 Correction factors by altitude according to international standards Operation Correction factor Temperature for fusion time ( C ) - 20 a a a a a a a a TABLE 4 Correction factors by temperature DRIWISA fuses are manufactured in a range from 2.4 to 38 kv in series DRS, DRN, and DRK, in lenghts in agreement to voltage level and dimensions in ccordance with international standards, as described in Figures and Tables of the Selection Guide of Section I, and they are used in combination with load-break fused disconnector switches and fuse-holders. The more common use is for transformers, motors, capacitors, potential transformers, overhead lines and feeder cables protection in substations and for medium and high voltage (2.4 kv up to 38 kv) industrial, rural and urban applications. NOTES: Selection criteria, calculation factors and electric and mechanical data, are included in this manual, Technical Bulletins of reference and Selection Guides and specifications, are exclusively for high interrupting capacity current-limiting DRIWISA fuses to be used in high voltage systems. Concepts and recommendations described in this manual should be considered and applied in agreement to the specific conditions of every case. When using similar fuses of other brands the corresponding data must be obtained or consulted with the respective manufacturer. HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-22

91 DRIWISA HIGH VOLTAGE CURRENT-LIMITING FUSES HIGH INTERRUPTING CAPACITY INDOOR AND OUTDOOR USE COMPLEMENTARY INFORMATION FIGURE 12 Structure of DRIWISA information regarding current-limiting fuses and related subjects For further information contact: DRIESCHER Y WITTJOHANN, S.A. San Luis Tlatilco # 29 Parque Industrial Naucalpan 53470, Naucalpan, Edo. de México Tel: (525) Fax: (525) driwisa@df1.telmex.net.mx HIGH VOLTAGE EQUIPMENT MANUFACTURERS SAN LUIS TLATILCO Nº 29 PARQUE INDUSTRIAL NAUCALPAN, C.P NAUCALPAN, EDO. DE MEX. TEL. (5255) , (5255) FAX (5255) EDITION 2003 H-23

92 HV Expulsion cut-out fuselinks Specifications Voltage Rating: Speeds O/L Capacity kV K - fast T - slow 150% for both speeds Amp Range: 1-200A Approvals: complies with ANSI/NEMA Ratings: 1, 2, 3, 6, 8, 10, 12, 15, 20, 25, 30, 40, 50, 65, 70, 80, 100, 0, 200A Description Fusetek expulsion links are semi-enclosed buttonhead pattern fuse-links for use in standard expulsion distribution cut-outs. They are available in 'K' (fast) or 'T' (slow) speed and have industry standard, removeable button heads. Their braided leads are tin-plated copper and of sufficient length for the voltage ratings encountered in the field. Part Numbers Amps K Speed T Speed 1 CM1KA23 CM1TA23 2 CM2KA23 CM2TA23 3 CM3KA23 CM3TA23 6 CM6KA23 CM6TA23 8 CM8KA23 CM8TA23 10 CM10KA23 CM10TA23 12 CM12KA23 CM12TA23 15 CM15KA23 CM15TA23 20 CM20KA23 CM20TA23 25 CM25KA23 CM25TA23 30 CM30KA23 CM30TA23 40 CM40KA23 CM40TA23 50 CM50KA23 CM50TA23 65 CM65KA23 CM65TA23 80 CM80KA23 CM80TA CM100KA23 CM100TA23 0 CM0KA23 CM0TA CM200KA23 CM200TA < 23" 26" available as special order (change 23 to 26 in p/n) > pg 45

93 Delle Retrofit kits Fusetek adapter kits allow obsolete Delle Alsthom fuses to be upgraded to a standard DIN HV fuse. These kits are designed to replace all the hardware from the existing insulators up.! Upgrade obsolete equipment to modern DIN HV fuses.! Direct bolt-in replacement.! DIN fuses have superior electrical performance to fuses being replaced. Note: Adapter kits consist of 1 pair of 45mm fuse clips, transition plates and hardware. Fuses must be purchased seperately. See table below for fuse and adapter kit part numbers. If complete bases are required, please contact Fusetek. Adapter Kits for upgrading Delle Alsthom HV fuses Delle Fusetek Delle fuse part Adapter kit See amp range Service kv Fuse type number part number page FD3, 3M A 3.2/ kV Din series pg.21 FD A 10/12 12kV Din series pg.22 FD A 13.2/15 not req d 17.5kV Din series pg.23 FD A 20/ kV Din series pg.24 FD A 30/ kV Din series pg.25 FLR A 6.6 FK kV Din series pg.21 FLR A 15 FK kV Din series pg.23 FLP A A 3.2 FK kV Din series pg.21 FLP A A 5.5 FK kV Din series pg.21 FTR3 2-10A FK A FK kV Din series pg A FK105 FTR A 15 FK kV Din series pg A FK107 FTR6 FTR6 FTR7 2-10A FK A FK A FK A FK A FK A FK kv Din series pg kv Din series pg Kv Din series pg A FK108 FTR kV Din series pg A FK109 FLR A 25/30 FK110 38kV Din series pg.25 Delle replacement consists of one adapter kits (2 pair clips, adapter paltes and hardware) plus a DIN fuse. FD series Delle fuses are standard DIN distribution fuses and do not require an adapter kit. pg 46

94 HV Indicators DRIWISA voltage indicators emit a red glow to indicate presence of voltage in switchgear up to 38kV. They operate by capacitive effect, ionizating a gas inside a sealed tube. One end is connected to the live part and the path is completed through air. Standard model (photo) has articulated arm and dust hood. Economy model includes glow tube and mounting clips only.!#available in standard and economic models!#compact dimensions!#no maintenance required!#replaceable indicator tube. Part Numbers for HV Indicators System voltage Standard model Economy model 7.2kV DW kV DW DW kV DW DW kV DW DW HV Indicators for remote signaling Our microswitch assembly allow remote annuciation of fuse operation. It consists of an insulated Bowden cable operating a microswitch. On end of the cable in terminated in a bracket at the fuse end, the other terminating in a bracket that also houses the microswitch. The actuating force is provided by the fuse striker pin.!#provide remote annunciation of fuse operation (per phase.)!#easily adaptable to a variety of clip/fuse configurations.!#no maintenance required!#standard Form C NO/NC contacts. Insulation rating Max cable length up to 36kV 590mm Part Number pg 47

95 Epoxy resin insulators In stock solutions for supported high voltage busbar, clips or other components. Hole pattern matches our 630A 45mm, clips shown on next page. RATED MAX. Cantilever No. Withstand Vac Vac Class Strength of fins Vac 60 Hz B.I.L TYPE MODEL kv KV N kv(1min) kv A DWA-07A A DWA-15A A DWA-20A A DWA 30A B DWA-07B B DWA-15B B DWA-20B B DWA-30B C DWA-07C C DWA-15C C DWA-20C C DWA-30C GENERAL DIMENSIONS: TYPE MODEL A B C D E F G H mm mm mm inches inches inches mm mm base upper lower upper radial C to C of creepage height dia face dia hole φ hole φ hole φ radial hole distance A DWA-07A /2 3/8 1/ A DWA-15A /8 3/8 1/ A DWA-20A /8 3/8 1/ A DWA 30A /8 3/8 1/ B DWA-07B /8 5/8 3/ B DWA-15B /4 5/8 3/ B DWA-20B /4 5/8 3/ B DWA-30B /8 3/ C DWA-07C /4 5/8 3/ C DWA-15C /4 5/8 3/ C DWA-20C /4 5/8 3/ C DWA-30C /8 3/ pg 48

96 FC45R - reinforced 45mm clip Rating - 200A H - 95mm W - 40mm L - 32mm w/o tang Mntg holes - 2-1/4" &1/2" on clip centerline. see below for tang info. DW heavy duty 45mm clip Rating - 630A H - 92mm W - 80mm L mm incl. tang fmtng. holes - drilled to match our insulator bolt pattern. See page 47. DW A dual 45mm Rating A H - 92mm W - 171mm L - 82mm incl. tang Mtng. holes -to fit our insulators. See page 47. PT1-1" spring clip Rating - 60A H " W " L " Mntg. hole " on clip centerline. FC3R - 3" spring clip Rating - 600A H - 4.5" W - 4.3" L - 1.5" Mntg. holes - 2 x 3/8" holes, 2" apart on clip centerline. PT /16" spring clip Rating - 200A H - 95mm W - 40mm L - 32mm w/o tang Mntg hole - 1 x 1/2" on clip centerline. see below for tang info. Metric/UNC Adapter stud Receptacle Thread Specs & Part Numbers Extension for FC45R & PT156 Use terminal tang when clip is mounted to non conducting support or alternate termination is required. For use with PT156 part no. PT156-EXT Part No. Stud Receptacle S13-R12 1/2-13 unc M12 S38-R12 3/8-16 unc M12 S12-R13 M12 1/2-13 unc S12-R38 M12 3/8-16 unc For use with FC45R part no. FC45R-EXT pg 49

97 TCCF 2.4/4.8kV Capacitor fuses TCCF fuses are current-limiting, partial range fuse designed to provide short circuit protection for capacitors. The primary application of these fuses is for the individual unit fusing of three phase capacitors in metal enclosed equipments. They are non-indicating and nondisconnecting.! Direct stud-mounting on 1/2-13 capacitor studs eliminates seperate holder.! replaces Westinghouse and CGE fuses! Adapters are available to convert to other stud threads(pg49) p/n example TCCF- 50A Application Please refer to the fuse selection chart on page 44 of this publication. For higher amp and voltage ratings - please refer to our Dreischer section on pages Ratings: 25, 50, 75, 100, 125, 200A Vac: 25-75A 4.8kV A 2.4kV I.R: 50kA rms symm m.b.c 200% of rating Approvals: self certified to ANSI TFCF Melting time current characteristics 1000 Dimensions (mm) 100 Stud 1/2-13unc Time in seconds------> Boss 1/2-13unc internal 25 hex RMS Amperes > pg 42

98 TFCF 600V Capacitor fuses TFCF fuses are current limiting fuses designed for unit fusing of 600v (or less) capacitors. They are threaded for M12 metric capacitor bushings, but may be adapted to 3/8 or 1/2" UNC threads with the adapters shown on page 48.! Metric threaded for direct screw on mounting to metric capacitor studs.! Excellent short circuit performance.! Fully plated metal parts for cooler running. 600Vac 200kA IR TFCF fuses should be selected at % of the nominal capacitor full load current or next nearest size up. If capacitor is installed in close proximity to other capacitor banks, or is switched frequently, select higher amp fuses within this range. p/n example TFCF- 50A Melting Time Current Characteristics Part number TFCF General Specifications - in. (mm) Amp ratings L D 6, 10, 15, 20, 25, 30A 35, 40, 50, 60A 70, 80, 90, 100A 110,125, 150, 175, 200A 4.13" (105) 4.84" (123) 1.10" (28) 1.62" (41) Time in seconds------> (30).78 (20) Stud M12 external top D L bottom.78 (20) RMS Amperes >.85 (22) Boss M12 internal pg 43

99 Fuse Selection chart for Capacitors Applicable for all current limiting fuses - high and low voltage. Use dotted line for single phase and star connections, solid line for delta connections. Above 100A, curves are identical. For auto-switching, or switching in close proximity to other capacitor banks, multiply capacitor FLA x 1.6 before using scale at bottom. Read up from capacitor FLA scale at bottom to intersection of appropriate curve (star or delta). Fuse rating is whatever band intersection occurs in. Read fuse rating on left scale. pg 44

100 Stud Mount Capacitor fuses All the Driescher fuses listed on the preceding 2 pages can be ordered with tapped 1/2-13unc inserts for mounting directly to capacitor bushings. (see page 26 for dimensions). Additional sizes are listed below. To order this feature, change the DRS to DRK. eg: DRK07/100-A2 Note: DRK series fuses have the striker pin omitted. Electrical data and nominal dimensions are the same as for DRS kV Part Numbers DRK07/4-A1 Amps 4A DRK07/32-A1 32A 40kA A DRK07/40-A1 40A 100A DRK07/50-A1 50A 125A DRK07/63-A1 63A 158A DRK07/75-A1 75A 225A DRK07/100-A1 100A 300A Interrupting Rating Major Dimensions (mm) m.b.c (A) I.R mva TL L D 10A DRK07/6-A1 6A 15A DRK07/10-A1 10A 25A DRK07/16-A1 16A 40A DRK07/25-A1 25A 63A Driescher Current Cut-off characteristics all voltage classes peak current (A) x Prospective Short Circuit - rms amps x 1000 pg 30

101 Driescher DIN melting time current characteristics Time in seconds------> RMS Amperes > pg 31

102 Driescher DIN HV Distribution Driescher fuses are preferred in some utility applications due to their faster characteristic which improves upstream co-ordination with utility devices.! Very high amp ratings available! Available in stud mount versions for mount ing on capacitor bushings.! Interchangeable with other standard DIN dimension HV fuses. Please see application notes for DIN fuses on page 19. Dresicher fuses have standard DIN dimensions. Please refer to the specification tables on the following pages for dimensions and technical data. Dimensions (mm) 1/2-13unc inserts for DRK series (both ends indentical) TL pg 26

103 Transformer application The fuse ratings recommended in the following tables have been chosen with the following conditions in mind:! Fuses must pass normal primary winding magnetising inrush currents: These are taken as 12x the normal full load current(flc) at.1 sec, and 25x FLC at.01 sec. Certain applications may require a higher amp rating than recommended. Please contact Fusetek with application details.! After a sustained power outage, the fuse must be able to withstand an overload of approximately 6 x FLC for 1 sec. and 3 x FLC for 10 sec.! The maximum voltage rating of the fuse must be equal to, or greater than the maximum line-to-line system voltage including utility tolerances. Capacitor Application Minimum fuse rating for Transformer Application Tx System kv Kva Fuse amp rating All Dreischer fuses can be supplied with 1/2-13unc threaded inserts (single barrel only) for direct mounting to capacitor bushings. Characteristics remain unchanged from standard Dreischer fuses. Change DRS in part number to DRK if this option is required. See selection table on page 44 for correct fuse sizing. pg 27

104 Driescher DIN distribution fuses Part Numbers Amps Interrupting Rating Major Dimensions (mm) m.b.c (A) I.R mva TL L D kV DRS04/125-B1 125A A 40kA DRS04/160-B1 160A A DRS04/200-B2 200A 63kA A 85 DRS04/250-B2 250A 1000A 40kA 330 DRS04/315-B2 315A 1260A DRS04/400-B7 400A 63kA A DRS04/500-B7 500A 1000A 40kA 330 DRS04/630-B7 600A 1260A kV DRS07/2-A2 2A 5A DRS07/4-A2 4A 10A DRS07/6-A2 6A 15A DRS07/10-A2 10A 25A DRS07/16-A2 16A A DRS07/25-A2 25A 63A 63kA DRS07/32-A2 32A 80A DRS07/40-A2 40A 100A DRS07/50-A2 50A 125A DRS07/63-A2 63A 158A DRS07/75-A2 75A A DRS07/100-A2 100A 300A kV DRS07/125-B4 125A 375A 1300 DRS07/160-B4 160A 63kA 480A DRS07/200-B4 200A A DRS07/250-B4 250A 1000A 40kA 500 DRS07/315-B4 315A 1260A DRS07/400-B4 400A 1600A 20kA 300 DRS07/500-B4 500A 1750A 2.4/7.2kV DRS07/125-A7 125A 158A DRS07/150-A7 150A 63kA A DRS07/200-A7 200A 300A DRS07/315-B8 315A A 63kA DRS07/400-B8 400A A DRS07/500-B8 500A 1000A 40kA 500 DRS07/630-B8 630A 1260A kV DRS12/125-B4 125A 63kA 375A DRS12/160-B4 160A 480A 40kA DRS12/200-B4 200A 800A 500 DRS12/250-B7 250A 63kA 375A DRS12/315-B7 315A 480A 40kA DRS12/400-B7 400A 800A kV DRS15/2-A4 2A 5 DRS15/4-A4 4A 10 DRS15/6-A4 6A 80Ka DRS15/10-A4 10A 25 DRS15/16-A4 16A Double double double double pg 28

105 Part Numbers Amps Interrupting Rating Major Dimensions (mm) m.b.c (A) I.R mva TL L D kV continued DRS15/25-A4 25A 63 DRS15/32-A4 32A DRS15/40-A4 40A DRS15/50-A4 50A DRS15/63-A4 63A DRS15/75-B4 75A DRS15100-A4 100A DRS15/125-B4 125A DRS15/160-B4 160A DRS15/200-B4 200A DRS15/200-B5 200A DRS15/250-B8 250A DRS15/315-B8 315A double 85 DRS15/400-B8 400A DRS15/400-B9 400A /25.8kV DRS20/6-A4 6A 15 DRS20/10-A4 10A 25 DRS20/16-A4 16A DRS20/25-A4 25A DRS20/32-A4 32A 80 DRS20/40-A4 40A 100 DRS20/50-A4 50A 125 DRS20/63-A4 63A DRS20/75-B4 75A 225 DRS20/100-B4 100A DRS20/125-B4 125A DRS20/160-B4 160A DSR20/200-B8 200A DRS20/250-B8 250A DRS20/315-B8 315A 480 double 85 DRS20/250-B9 250A DRS20/315-B9 315A /38kV DRS30/2-A5 2A DRS30/4-A5 4A 10 DRS30/6-A5 6A DRS30/10-A5 10A DRS30/15-A5 16A DRS30/25-A5 25A DRS30/32-A5 32A DRS30/40-A5 40A DRS30/50-A5 50A DRS30/63-A5 63A DRS30/75-B5 75A DRS30/100-B5 100A DRS30/125-A9 125A double 66 DRS30/150-B9 150A DRS30/200-B9 200A double 85 DRX30/250-B9 250A DRX30/315-B9 315A pg 29

106 Stud Mount Capacitor fuses All the Driescher fuses listed on the preceding 2 pages can be ordered with tapped 1/2-13unc inserts for mounting directly to capacitor bushings. (see page 26 for dimensions). Additional sizes are listed below. To order this feature, change the DRS to DRK. eg: DRK07/100-A2 Note: DRK series fuses have the striker pin omitted. Electrical data and nominal dimensions are the same as for DRS kV Part Numbers DRK07/4-A1 Amps 4A DRK07/32-A1 32A 40kA A DRK07/40-A1 40A 100A DRK07/50-A1 50A 125A DRK07/63-A1 63A 158A DRK07/75-A1 75A 225A DRK07/100-A1 100A 300A Interrupting Rating Major Dimensions (mm) m.b.c (A) I.R mva TL L D 10A DRK07/6-A1 6A 15A DRK07/10-A1 10A 25A DRK07/16-A1 16A 40A DRK07/25-A1 25A 63A Driescher Current Cut-off characteristics all voltage classes peak current (A) x Prospective Short Circuit - rms amps x 1000 pg 30

107 Driescher DIN melting time current characteristics Time in seconds------> RMS Amperes > pg 31

108 Driescher HV loadbreak switches DRIWISA load-break switches are used to connect or disconnect high voltage distribution circuits under load conditions. The fused version of the switch provides automatic 3 phase disconnect if any of the fuses operates. Operation of the fused and non-fused versions can also be initiated through a shunt trip or manual operation.!#high speed operating mechanism!#compact dimensions!#ansi ratings!#available in fusible and non-fusible versions Note: for complete data please request Dreischer bulletin. Part numbers for 630A, RH operating mech, automatic trip Fusible version - for fuse length Vac Non fusible BL=192mm BL=292mm BL=442mm BL=537mm 7.2kV LDTP07/060CKN LDTP07/061CKN LDTP07/062CKN LDTP07/064CKN LDTP07/065CKN 17.5kV LDTP15/060CKN - - LDTP15/064CKN LDTP15/065CKN 25.8kV LDTP20/060CKN - - LDTP20/064CKN LDTP20/065CKN 38kV LDTP30/060CKN - LDTP30/065CKN Specifications MAXIMUM RATED ASYMMETRICAL SHORT-TIME BASIC IMPULSE LEVEL WITHSTAND VOLTAGE VOLTAGE CURRENT PEAK CURRENT (BIL) 1.2 x 50 s 60 Hz 1 min DRY SERIE CURRENT Up Ud KV A KA(rms) KA(rms) KV KV TO GROUND ACROSS TO GROUND ACROSS Ur Ir Ip Ik AND BETWEEN OPEN AND BETWEEN OPEN $ # # POLES GAP POLES GAP pg 33

109 HV Motor Fuses Specifications Voltage Rating: Interrupting Rating: Amp Range: Vac 50kA rms. symm. 2R-36R (50-650A) Designed to: Ansi (2.5 & 5.5) IEC (7.2kV) Ratings available: 2.5kV 2, 4, 5, 6, 9, 12R 5.5kV 2, 4, 5, 6, 9, 12, 18, 24, 30, 36R 7.2kV A (2R-18R) Description MR series fuses are current-limiting backup fuses designed to protect medium voltage motors and their associated control. They have standardised dimensions and are fully interchangeable with other fuses of the same type and rating. Blown fuse indication is standard on all types. The design of the striker travel and force meets standard requirements for mechanical actuation. 'R' Rating Defined Features! Integral indicating pin for visual or mechanical operation! 2.5kV and 5.5kV fuses can be hermetically sealed and supplied without indicator for use in hazardous location application.! fully plated metal parts for low contact resistance! standard 'R' ratings ensure interchangeability. Installation notes The 'R' rating for a fuse is established by dividing the second melt current of the fuse by 100. In this way, fuses having the same 'R' rating will melt at the same current level at 20s - thus ensuring identical motor starting capability and coordination with the overload relays. When replacing motor starting fuses, always match the 'R' rating - not the amp rating - to maintain identical co-ordination and motor starting capability. Fusetek MR fuses can replace any manufacturers' motor fuse having the same dimensions. Ensure that fuse clips still have good tension and clean all contact surfaces before re-installing fuses. The striker pin should be pointing up when installing fuses. Fuses should be replaced in sets of three to avoid nuisance blowing caused by element damage. Motor Circuits There are motor/fuse selection charts in each section. To use these fuse charts it is necessary to know the starting current and run-up time of the motor. For starting conditions not shown, please contact Fusetek.! Select appropriate run-up time (6 or 15 seconds)! Read down to appropriate starting current range.! Read across to find 'R' rating. Companion Products Insulators, fuse clips, adapter kits - see rear of HV section. Loadbreak switches pg

110 2.5kV Motor fuses - 7" centre Clip- in style Time in seconds 1 Melting Time Current Characteristics General Specifications D x L Part Number R FLA (inches) 70-2R-1C R 70 I.R ka total I2t x R-1C R R-1C R R-1C R R-1C R-1C R 9R ka rms R-1C R R-2C R 390 2x R-2C R R 3R 4R 6R 9R 12R 24R 5R 18R RMS Amperes Fuse selection for Motors rated 2.5kV or less Motor Starting Current (A) Fuse for 6 sec. run-up for 15 sec. run-up Rating from to from to 2R R R R R R R R R Peak amps x Current Cut-off at rated voltage Prospective Short Circuit - rms Amps x R 18R 12R 9R 6R 5R 4R 3R 2R pg 15

111 5.5kV Motor fuses - 12" centre Clip-in style Time in seconds Melting Time Current Characteristics General Specifications Part Number A F.L.A D x L I.R total I2t (inches) ka x R-1C5.5 2R R-1C-5.5 3R R-1C-5.5 4R R-1C-5.5 5R R-1C-5.5 6R R-1C-5.5 9R kA R-1C R 230 rms R-2C R R-2C R x R-2C R R-2C R R 3R 4R 6R 9R 12R 24R 36R 5R 18R 30R 38R RMS Amperes Fuse selection for Motors rated 5.5kV or less Fuse Rating Motor Starting Current (A) for 6 sec. run-up for 15 sec. run-up from to from to 2R R R R R R R R R R R Peak amps x Current Cut-off at rated voltage Prospective Short Circuit - rms Amps x R 36R 30R 24R 18R 12R 9R 6R 5R 4R 3R 2R pg 16

112 7.2kV Motor fuses - British bolt-in style 1000 Melting Time Current Characteristics Part Number General Specifications F.L.A Equiv R rating D x L (inches) I.R ka 50 2R 63 3R Time in seconds------> R 125 5R 0 6R R R R RMS Amperes > Fuse selection for Motors rated 7.2kV or less Fuse Rating Motor Starting Current (A) for 6 sec. run-up for 15 sec. run-up from to from to 2R R R R R R R R Peak Current - assym. amps x Current Cut-off at rated voltage Prospective Short Circuit - rms Amps x 1000 pg 17

113 Other types and tag arrangements Our 3" diameter R and E rated ferrule (clip-in) are available with modified caps/tags as shown below.the modification of the end fittings does not affect the electrical performance of the fuse. Please refer to the appropriate basic ferrule fuse data. 2" Hookeye Feature - add 'W' to part number Bolt-in Tags - add 'Bi' to part number 2" Extension - add 'X' to part number Types 1B 1iB ITE Clip-Loc feature - add 'CL' to part number GE Bolt in tags add 1B or 1iB to part number Option Availability 2.75kV - R 5.5kV - R 8.3kV - R 2.75kV - E 5.5kV - E 8.3kV - E 15.5kV - E 25.8kV - E 38kV - E Plain Ferrule " " " " " " " " " Bi bolt-in W Hookeye 1B bolt-in 1iB bolt-in CL ClipLoc X body extension " " " " " " " " " " " " " " " " " " " " " pg 18

114 Potential Transformer fuses FC series fuses are current limiting, non-indicating, partial range HRC fuses available in a variety of voltage, amperage and interrupting ratings. (see chart). FC series are North American dimensioned PT fuses and provide equals to Westinghouse and CGE. BPT series are British dimensioned PT fuses and offer equals to GEC, Brush, CCL, and EMP.! Pure silver elements! Fully plated metal parts for cool running.! Excellent current limitation for substantial reduction of short circuit stresses. Retrofitting Fusetek PT fuses can replace any other manufacturers' PT fuse with same dimensions and voltage/amp rating. When replacing fuses, ensure that fuse clips still have good spring tension. Adjust or replace if necessary. Make sure contact surfaces are clean and free of corrosion. Companion Products Insulators, fuse clips and bases. Please see the end of this section for these items. PT Fuses - General Specifications Vac Part Number Ratings D x L (inches) I.R rms symm. North American dimensions 625 FC460 1/2, 1, 2, 3, 5A / kV FC461 1/4, 1/2, 1, 1, 2, 3A kA 2.75kV FC /2, 1, 1.5 2, 3, 5A 1-9/16 FC kA 4.8kV 4.8NPT 1/2, 1, 2, 3, 5A 13/ kA 5.5kV FC /2, 1, 1.5 2, 3, 5A 1-9/16 FC kA 8.3kV FC466 1/2, 1, 1.5 2, 3, 5A 1-9/ kA 15.5kV FC467 1/2, 1, 1.5 2, 3, 5A 1-9/ kA 25.8kV FCA22 1/2, 1, 2, 3, 5A 1-9/ kA British dimensions 5.5kV 5.5BPT 1/2, 1, 3, 5A kA 8.5kV 8.5BPT 1/2, 1, 3A kA Other types 1.2kV mA-6.3A 8mm 50mm 35A 3.0kV mA-4A 8mm 85mm 35A 6.0kV mA-4A 8mm 120mm 35A 10.0kV mA-2A 8mm 150mm 35A 15.5kV FC493-1/2E Ozonator 1/2A only 15mm 153mm 30kA pg 40

115 Application PT fuses are used to isolate the voltage (or PT) transformer from the supply in the event of a primary winding failure. Properly selected fuses will also operate quickly if there is a short circuit on the secondary side of the transformer. To provide optimum protection without nuisance blowing, it is necessary to consider the following points:! The interrupting rating must be equal to or greater than the largest anticipated short circuit.! The fuse must pass the magnetising inrush to the primary windings without damage or operation. This inrush is normally considered to be 12 times the primary FLC for 0.1 second.! The fuse's voltage rating must be equal to, or greater than the system voltage. 3 phase FLC = kva x 1000 Single phase FLC = kva x 1000 vac x 1.73 vac all PT fuses Transformer Application Table Transformer Primary FLC (A) from to Fuse rating (A) / Melting Time current Characteristics Time in seconds / RMS Amperes pg 41

116 Potential Transformer fuses FC series fuses are current limiting, non-indicating, partial range HRC fuses available in a variety of voltage, amperage and interrupting ratings. (see chart). FC series are North American dimensioned PT fuses and provide equals to Westinghouse and CGE. BPT series are British dimensioned PT fuses and offer equals to GEC, Brush, CCL, and EMP.! Pure silver elements! Fully plated metal parts for cool running.! Excellent current limitation for substantial reduction of short circuit stresses. Retrofitting Fusetek PT fuses can replace any other manufacturers' PT fuse with same dimensions and voltage/amp rating. When replacing fuses, ensure that fuse clips still have good spring tension. Adjust or replace if necessary. Make sure contact surfaces are clean and free of corrosion. Companion Products Insulators, fuse clips and bases. Please see the end of this section for these items. PT Fuses - General Specifications Vac Part Number Ratings D x L (inches) I.R rms symm. North American dimensions 625 FC460 1/2, 1, 2, 3, 5A / kV FC461 1/4, 1/2, 1, 1, 2, 3A kA 2.75kV FC /2, 1, 1.5 2, 3, 5A 1-9/16 FC kA 4.8kV 4.8NPT 1/2, 1, 2, 3, 5A 13/ kA 5.5kV FC /2, 1, 1.5 2, 3, 5A 1-9/16 FC kA 8.3kV FC466 1/2, 1, 1.5 2, 3, 5A 1-9/ kA 15.5kV FC467 1/2, 1, 1.5 2, 3, 5A 1-9/ kA 25.8kV FCA22 1/2, 1, 2, 3, 5A 1-9/ kA British dimensions 5.5kV 5.5BPT 1/2, 1, 3, 5A kA 8.5kV 8.5BPT 1/2, 1, 3A kA Other types 1.2kV mA-6.3A 8mm 50mm 35A 3.0kV mA-4A 8mm 85mm 35A 6.0kV mA-4A 8mm 120mm 35A 10.0kV mA-2A 8mm 150mm 35A 15.5kV FC493-1/2E Ozonator 1/2A only 15mm 153mm 30kA pg 40

117 Application PT fuses are used to isolate the voltage (or PT) transformer from the supply in the event of a primary winding failure. Properly selected fuses will also operate quickly if there is a short circuit on the secondary side of the transformer. To provide optimum protection without nuisance blowing, it is necessary to consider the following points:! The interrupting rating must be equal to or greater than the largest anticipated short circuit.! The fuse must pass the magnetising inrush to the primary windings without damage or operation. This inrush is normally considered to be 12 times the primary FLC for 0.1 second.! The fuse's voltage rating must be equal to, or greater than the system voltage. 3 phase FLC = kva x 1000 Single phase FLC = kva x 1000 vac x 1.73 vac all PT fuses Transformer Application Table Transformer Primary FLC (A) from to Fuse rating (A) / Melting Time current Characteristics Time in seconds / RMS Amperes pg 41

118 HV DIN fuse bases DRIWISA fuse bases are available in single or 3 pole versions in 630 or 1250A (dual clip) versions. Supported voltages are 7.2, 17.5, 25.8 and 38kV. Base is heavy duty galvanised steel with epoxy resin standoff insulators. 630A silver plated clips are standard. 3 pole versions can be fitted with auxilliary microswitches for remote blown-fuse annunciation. Note: these bases can be modified to accept North American E rated fuses. Please contact Fusetek for details. Part numbers for 630A single & 3 pole DIN fuse bases Fuse body length (BL) Vac No. Poles BL=192mm BL=292mm BL=442mm BL=537mm 7.2kV 17.5kV 25.8kV 38kV 1 SP07/061AMN SP07/062AMN SP07/064AMN SP07/065AMN 3 DSP07/061AMN DSP07/062AMN DSP07/064AMN DSP07/065AMN 1 - SP15/062AMN SP15/064AMN SP15/065AMN 3 - DSP15/062AMN DSP15/064AMN DSP15/065AMN SP20/064AMN SP20/065AMN DSP20/064AMN DSP20/065AMN SP30/065AMN DSP30/065AMN Specifications MAXIMUM RATED BASIC IMPULSE LEVEL WITHSTAND VOLTAGE VOLTAGE CURRENT (BIL) 1.2 x 50 s 60 hz 1 min DRY SERIE Up Ud kv A kv kv TO GROUND ACROSS TO GROUND ACROSS Ur Ir AND BETWEEN OPEN AND BETWEEN OPEN POLES GAP POLES GAP pg 32

119 Medium Voltage Fuses ,500 VAC Current Limiting Current limiting E and R rated fuses are equipped with a mechanical indicator or striker pin that protrudes through the fuse cap upon operation of the fuse. This provides visual identification of a blown fuse and can be used as a trigger for external devices. Littelfuse now offers a complete selection of E and R rated medium voltage fuses for the protection of transformers, potential transformers, feeders, and motor circuits. Single, double, and triple barrel designs are available to cover a wide range of current, voltage, and interrupting ratings. Conventional ferrule type, clip lock, and bolt-in mounting configurations are now available for virtually any application. Hermetically sealed fuses for use in hazardous environments are also offered. Contact the factory or your local Littelfuse representative for additional fuse ratings or custom mounting configurations. 24 Hour Emergency Service is available. Call GENERAL INFORMATION The terms Medium Voltage and high voltage have been used interchangeably by many people to describe fuses operating above 600 volts. Technically speaking, medium voltage fuses are those intended for the voltage range from 2,400 to 38,000 VAC. High voltage fuses are for circuits carrying voltages greater than 38,000 VAC. E Rated fuses are considered to be general purpose fuses and can be used to protect against low and high values of fault current. R rated fuses are designed for back-up protection. They must be used in series with other devices, such as motor overload relays, in order to achieve both overload and short circuit protection. Medium voltage fuses are not intended to provide overload protection in the same sense as fuses rated 600 volts or less. Medium voltage fuse current ratings do not have the same meanings as the ampere ratings of low voltage fuses. All medium voltage fuses are limited in their ability to interrupt low value overcurrents, especially those between 100% and 200% of the fuse s continuous current rating. They are designed to carry their rated current without exceeding the temperature rise permitted by NEMA and ANSI standards. Additional application data can be found in the Fuse Application section of the POWR-GARD Products catalog (PF101). APPLICATIONS Power Transformer Protection Potential Transformer Protection Motor Controller Back-up Protection Fused Switches Feeder Circuits Bolt-in Mount Fuses 61

120 R Rated Medium Voltage Fuses Current Limiting FEATURES R rated fuses provide required short-circuit protection for medium voltage motors, motor controllers and associated circuitry. These components have limited ability to absorb the energy of large short circuit currents. Medium voltage motor controllers contain overload relays which provide both overload protection and locked rotor protection to the motor. The controllers are also intended to interrupt low value short circuits within the capability of the motor controller. This protects the medium voltage fuse from sustained overcurrents which are less than their minimum interrupting rating. NEMA Standards for R rated medium voltage power fuses require that they operate within seconds when subjected to an rms current 100 times the R rating. For example, a fuse with a 2R rating will open within 15 to 35 seconds on an applied current of 2 x 100 = 200 amperes. Part Number System 130-4R-1C-5.5 Max Voltage (KV) Style (C-Cartridge) No. of Barrels Rating (size) Continuous Current CHARACTERISTICS Voltage Rating: 2,400 volts 15,500 volts Current Range: 2R 36R OPTIONS Hermitically sealed for use in hazardous locations (add S suffix to part number) Hookeye attachment (add W suffix to part number) Bolt-in mounting configurations Hookeye Feature* *For hookeye attachment; add W suffix to part number 3"DIA 6.38" 9.75" Dim.A Clip Center Dim.B D DD DDD FIGURE 1 FIGURE 2 FIGURE 3 R RATED 2.75 KV Catalog Number 70-2R-1C R-1C R-1C R-1C R-1C R-1C R-1C R-2C R-2C-2.75 Old Catalog Number LCK 2R LCK 3R LCK 4R LCK 5R LCK 6R LCK 9R LCK 12R LCK 18R LCK 24R Size 2R 3R 4R 5R 6R 9R 12R 18R 24R Maximum Continuous 40 deg C Dim. A (inches) 7" 7" Dim. B (inches) " " Minimum Interrupting Rating RMS Amps Max Interrupting Rating RMS Asym Figure Number Add w suffix to part number for hookeye attachment. 62

121 R Rated Medium Voltage Fuses Current Limiting 3"DIA 6.38" 9.75" Dim.A (Clip Center) Dim.B FIGURE 4 FIGURE 5 FIGURE 6 R RATED 5.5 KV Catalog Number 70-2R-1C R-1C R-1C R-1C R-1C R-1C R-1C R-2C R-2C R-2C R-2C R-2C R-2C R-3C R-3C R-3C-5.5 Old Catalog Number LCL 2R LCL 3R LCL 4R LCL 5R LCL 6R LCL 9R LCL 12R LCL 18R LCL 24R LCL 36R Size 2R 3R 4R 5R 6R 9R 12R 18R 24R 26R 30R 32R 36R 30R 32R 36R Maximum Continuous 40 deg C Dim. A (inches) 12" 12" 12" Dim. B (inches) " " " Minimum Interrupting Rating RMS Amps Max Interrupting Rating RMS (Asym) Figure Number KV Clip Centers 70-2R-1C-5.5X 100-3R-1C-5.5X 130-4R-1C-5.5X 150-5R-1C-5.5X 170-6R-1C-5.5X 200-9R-1C-5.5X R-1C-5.5X R-2C-5.5X R-2C-5.5X 2R 3R 4R 5R 6R 9R 12R 18R 24R " " " " R RATED 8.25 KV Catalog Number 70-2R-1C R-1C R-1C R-1C R-1C R-1C R-1C R-2C R-2C-8.25 Old Catalog Number Size 2R 3R 4R 5R 6R 9R 12R 18R 24R Maximum Continuous 40 deg C Dim. A (inches) 12" 12" Dim. B (inches) " " Minimum Interrupting Rating RMS Amps Max Interrupting Rating RMS (Asym) Figure Number Add w suffix to part number for hookeye attachment. 63

122 R Rated Medium Voltage Fuses Current Limiting Littelfuse s POWR-GARD medium voltage fuses are available in several bolt-in mounting configurations. Contact factory for custom configurations B Bolt mount BI Bolt-In mount IB Inverted-Bolt mount Refer to illustrations for mounting dimensions. Indicator (2).34" X.660 Slots 1.38" Apart 3" Dia. Indicator Indicator 3" Dia. Indicator Dim.B Dim.B Dim.B (2).34" Holes 1.38" Apart Dim.A Dim.A FIGURE 7 FIGURE 8 FIGURE 9 FIGURE 10 Bolt Mount B Inverted Bolt IB R RATED 2.75 KV Bolt Mount B Catalog Number 70-2R-1B R-1B R-1B R-1B R-1B R-1B R-1B R-2B R-2B-2.75 Old Catalog Number Size 2R 3R 4R 5R 6R 9R 12R 18R 24R Maximum Continuous 40 deg C Dim. A (inches) 4.6" 7.4" Dim. B (inches) 13" 13" Minimum Interrupting Rating RMS Amps Max Interrupting Rating RMS (Asym) Figure Number KV Inverted Bolt IB 70-2R-1IB R-1IB R-1IB R-1IB R-1IB R-1IB R-1IB R-2IB R-2IB R 3R 4R 5R 6R 9R 12R 18R 24R " 13"

123 65 Catalog Number 70-2R-1BI R-1BI R-1BI R-1BI R-1BI R-1BI R-1BI R-2BI R-2BI R-2BI R-2BI R-2BI R-2BI R-3BI R-3BI R-3BI R-3BI-5.5 Dim.B Dim.A Dim.B Dim.A Dim.A 3"Dia. Front View.44" X.91" Slots (1.53" c.t.c.) Indicator Indicator R RATED 5.5 KV Bolt In Mount BI Old Catalog Number Size 2R 3R 4R 5R 6R 9R 12R 18R 24R 26R 30R 32R 36R 30R 32R 36R 38R Maximum Continuous 40 deg C Dim. A (inches) Dim. B (inches) 18" 18" 18" Minimum Interrupting Rating RMS Amps Max Interrupting Rating RMS (Asym) Figure Number R-1BI R-1BI R-1BI R-1BI R-1BI R-1BI R-1BI R-2BI R-2BI KV Bolt-In Mount BI 2R 3R 4R 5R 6R 9R 12R 18R 24R " 18" Bolt-In Mount BI 5.5 KV Bolt Mount B 70-2R-1B R-1B R-1B R-1B R-1B R-1B R-1B R-2B R-2B R-2B R-2B R-2B-5.5 2R 3R 4R 5R 6R 9R 12R 18R 24R 30R 32R 36R " 18" FIGURE 11 FIGURE 12 FIGURE R-1IB R-1IB R-1IB R-1IB R-1IB R-1IB R-1IB R-2IB R-2IB R-2IB R-2IB R-2IB-5.5 2R 3R 4R 5R 6R 9R 12R 18R 24R 30R 32R 36R " 18" KV Inverted Bolt IB

124 E Rated Medium Voltage Fuses Current Limiting E Rated fuses have time current characteristics designed to provide current limiting protection for power transformers, potential transformers, power centers, feeder centers, and unit sub stations. When properly applied, they can protect against high and low value fault currents. NEMA Standards for E rated medium voltage fuses require that fuses rated 100E or less open within 300 seconds (5 minutes) when subjected to an RMS value of % of the fuse s continuous current rating; and fuses with an E rating larger than 100E must open within 600 seconds (10 minutes) when subjected to an rms current of % of the fuse s continuous current rating. These values establish one point on the time-current curve. Application Note: Since these fuses are used for the protection of general purpose circuits which may contain transformers, motors, and other equipment producing inrush and/or overload currents, fuses should generally be rated at 0% of the normal full load current, and circuits should be analyzed to ensure that system load currents will not exceed the current rating of the fuse. CHARACTERISTICS Voltage Rating: 2,400 volts 38,000 volts Current Range: 10E 600E OPTIONS Hermetically Sealed for use in hazardous locations (add S suffix to part number) Clip-lock (CL) and bolt-in styles available. 3"DIA 6.38" 9.75" Dim.A (Clip Center) Dim.B FIGURE FIGURE 15 FIGURE 16 E RATED 2.75 Max. KV Catalog Number 10E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-2C E-2C E-2C E-2C E-2C E-2C E-2C E-2C E-2C E-2C-2.75 Old Catalog Number LCX 10E LCX 30E LCX 40E LCX 50E LCX 65E LCX 80E LCX 100E LCX 125E LCX 150E LCX 175E LCX 200E LCX 250E LCX 300E LCX 400E Size 10E 15E 20E 25E 30E 40E 50E 65E 80E 100E 125E 150E 200E 125E 150E 175E 200E 225E 250E 300E 350E 400E 450E Dim. A (inches) 7" 7" Dim. B (inches) " " Max Interrupting Rating RMS (Asym) Figure Number

125 E Rated Medium Voltage Fuses Current Limiting E RATED 5.5 Max. KV Catalog Number 10E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-2C E-2C E-2C E-2C E-2C E-2C E-2C E-2C E-2C E-3C E-3C E-3C-5.5 Old Catalog Number LCY 30E LCY 40E LCY 50E LCY 60E LCY 80E LCY 100E LCY 125E LCY 150E LCY 175E LCY 200E LCY 250E LCY 300E LCY 350E LCY 400E LCY 450E Size 10E 15E 20E 25E 30E 40E 50E 65E 80E 100E 125E 150E 175E 200E 125E 150E 175E 200E 250E 300E 350E 400E 450E 500E 550E 660E Dim. A (inches) 12" 12" 12" Dim. B (inches) " " " Max Interrupting Rating RMS (Asym) Diagram Max. KV 5NLE-10E 5NLE-15E 5NLE-20E 5NLE-25E 5NLE-30E 5NLE-40E 5NLE-50E 5NLE-65E 5NLE-80E 5NLE-100E 5NLE-125E 5NLE-150E 5NLE-175E 5NLE-200E 5NLE2-225E 5NLE2-250E 5NLE2-300E 5NLE2-350E 5NLE2-400E 5NLE2-450E LCU 30E LCU 40E LCU 50E LCU 65E LCU 80E LCU 100E LCU 125E LCU 150E LCU 175E LCU 200E LCU 250E LCU 300E LCU 350E LCU 400E LCU 450E 10E 15E 20E 25E 30E 40E 50E 65E 80E 100E 125E 150E 175E 200E 225E 250E 300E 350E 400E 450E " 17-7/8" 17-7/8"

126 E Rated Medium Voltage Fuses Current Limiting E RATED 8.25 Max. KV Catalog Number 10E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-2C E-2C E-2C E-2C E-2C E-3C E-3C-8.25 Old Catalog Number LDZ 30E LDZ 40E LDZ 50E LDZ 65E LDZ 80E LDZ 100E LDZ 125E LDZ 150E LDZ 125E LDZ 150E LDZ 200E LDZ 250E LDZ 300E LDZ 350Z Size 10E 15E 20E 25E 30E 40E 50E 65E 80E 100E 125E 150E 125E 150E 200E 250E 300E 350E 400E Dim. A (inches) 12" 12" 12" Dim. B (inches) 15-7/8" 15-7/8" 15-7/8" Max Interrupting Rating RMS (Asym) Diagram Max. KV 8NLE-10E 8NLE-15E 8NLE-20E 8NLE-25E 8NLE-30E 8NLE-40E 8NLE-50E 8NLE-65E 8NLE-80E 8NLE-100E 8NLE2-100E 8NLE2-125E 8NLE2-150E 8NLE2-200E 8NLE2-250E LCZ 30E LCZ 40E LCZ 50E LCZ 65E LCZ 80E LCZ 100E LCZ 100E LCZ 125E LCZ 150E LCZ 200E 10E 15E 20E 25E 30E 40E 50E 65E 80E 100E 100E 125E 150E 200E 250E " " 17-7/8" 17-7/8" E RATED 15.5 Max. KV Catalog Number 10E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-2C E-2C E-2C E-2C E-2C E-2C E-2C E-3C E-3C E-3C-15.5 Old Catalog Number LDN 10E LDN 15E LDN 20E LDN 25E LDN 30E LDN 40E LDN 50E LDN 65E LDN 80E LDN 100E LDN 150E LDN 175E Size 10E 15E 20E 25E 30E 40E 50E 65E 80E 100E 65E 80E 100E 125E 150E 175E 200E 200E 250E 300E Dim. A (inches) 15" 15" 15" Dim. B (inches) " " " Max Interrupting Rating RMS (Asym) 60,000 60,000 60,000 Figure Number

127 E Rated Medium Voltage Fuses Current Limiting E RATED 15.5 Max. KV Catalog Number 15GSE-65E 15GSE-80E 15GSE-100E 15GSE2-125E 15GSE2-150E 15GSE2-175E 15GSE2-200E Old Catalog Number Size 65E 80E 100E 125E 150E 175E 200E Dim. A (inches) 18" 18" Dim. B (inches) 21-7/8" 21-7/8" Max Interrupting Rating RMS (Asym) 60,000 60,000 Figure Number Max. KV 15NLE-10E 15NLE-15E 15NLE-20E 15NLE-25E 15NLE-30E 15NLE-40E 15NLE-50E 15NLE-65E 15NLE-80E 15NLE-100E 15NLE2-80E 15NLE2-100E 15NLE2-125E 15NLE2-150E 15NLE2-175E 15NLE2-200E 15NLE3-150E 15NLE3-175E 15NLE3-250E 15NLE3-300E LCN 30E LCN 40E LCN 50E LCN 65E LCN 80ES LCN 100ES LCN 80E LCN 100E LCN 125X LCN 150E LCN 200ED 10E 15E 20E 25E 30E 40E 50E 65E 80E 100E 80E 100E 125E 150E 175E 200E 150E 175E 250E 300E 20" 20" 20" 23-7/8" 23-7/8" 23-7/8" 60,000 60,000 60, E RATED 25.8 Max. KV Catalog Number 15E-1C E-1C E-1C E-1C E-1C E-1C E-2C E-2C E-2C-25.8 Old Catalog Number Size 15E 20E 25E 30E 40E 50E 65E 80E 100E Dim. A (inches) 21" 21" Dim. B (inches) 24-5/8" 24-5/8" Max Interrupting Rating RMS (Asym) 40,000 40,000 Figure Number E RATED 38 Max. KV Catalog Number 3E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-1C E-2C E-2C E-2C-38.0 Old Catalog Number Size 3E 7E 10E 15E 20E 25E 30E 40E 50E 65E 80E Dim. A (inches) 27" 27" Dim. B (inches) 30-5/8" 30-5/8" Max Interrupting Rating RMS (Asym) 20,000 20,000 Figure Number

128 E Rated Medium Voltage Fuses Current Limiting Clip Lock Design The clip lock type designs ensures a positive contact between the fuse and the connection cam. The fuse s clip lock tab slides in between the clip casting and the cam to prevent the fuse from slipping or blowing out of the holder. This positive contact improves heat dissipation and allows fuses to run cooler A B FIGURE 17 FIGURE FIGURE E RATED 5.5 Max. KV Clip Lock Catalog Number 10E-1CL E-1CL E-1C E-1CL E-1CL E-1CL E-1CL E-1CL E-1CL E-1CL E-1CL E-1CL E-2CL E-2CL E-2CL E-2CL E-2CL E-2CL E-3CL E-3CL E-3CL-5.5 Old Catalog Number Size 10E 15E 20E 25E 30E 40E 50E 65E 80E 100E 125E 150E 225E 250E 300E 350E 400E 450E 500E 550E 600E Dim. A (inches) 16.38" 17.38" 17.38" Dim. B (inches) 15.13" 16.13" 16.13" Max Interrupting Rating RMS (Asym) Figure Number E RATED 8.25 Max. KV Clip Lock Catalog Number 10E-1CL E-1CL E-1C E-1CL E-1CL E-1CL E-1CL E-1CL E-1CL E-1CL E-2CL E-2CL E-2CL E-2CL E-2CL E-2CL E-2CL E-3CL-8.25 Old Catalog Number Size 10E 15E 20E 25E 30E 40E 50E 65E 80E 100E 125E 150E 175E 200E 225E 250E 300E 350E Dim. A (inches) 17.38" 17.38" 17.38" Dim. B (inches) 16.13" 16.13" 16.13" Max Interrupting Rating RMS (Asym) Figure Number E RATED 15.5 Max. KV Clip Lock Catalog Number 10E-1CL E-1CL E-1CL E-1CL E-1CL E-1CL E-1CL E-1CL E-1CL E-1CL E-2CL E-3CL E-3CL E-3CL E-3CL E-3CL E-3CL-15.5 Old Catalog Number Size 10E 15E 20E 25E 30E 40E 50E 65E 80E 100E E 175E 200E 225E 250E 300E Dim. A (inches) 19.8" 22.81" 22.81" 22.81" Dim. B (inches) 18.1" 21.13" 19.1" 19.1" Max Interrupting Rating RMS (Asym) 60,000 60,000 60,000 60,000 Figure Number

129 E Rated Potential Transformer Fuses Current Limiting Potential Transformer (PT) fuses are current limiting fuses with high interrupting ratings designed for the protection of potential transformers. Application Note: When applying fuses for the protection of transformers, the magnetizing current inrush must be considered. The characteristics of the inrush, which can be matched with a fuse s time-current curve, should be available from the transformer manufacturer. CHARACTERISTICS Voltage Rating: 600VAC 25,500 VAC Current Range: 1/2E 10E B A E PT 600 Volt Catalog Number 3E-4PT-6 5E-4PT-6 7E-4PT-6 10E-4PT-6 Old Catalog Number Size 3E 5E 7E 10E Length Dim. A (inches) Diameter Dim. B (inches) Max Interrupting Rating RMS (Asym) 62,500 62,500 62,500 62, Max. KV 1E-4PT-2.4 2E-4PT-2.4 LCD 1E-4 LCD 2E-4 1E 2E ,000 40, Max. KV 1E-6PT E-6PT E-6PT E-8PT E-8PT E-8PT E 2E 3E 1E 2E 3E ,500 37,500 37,500 50,000 50,000 50, Max. KV 1E-5PT-4.8 2E-5PT-4.8 LCE 1E-4 LCE 2E-4 1E 2E ,000 50, Max. KV 1/2E-6PT-5.5 1E-6PT-5.5 2E-6PT-5.5 3E-6PT-5.5 5E-6PT-5.5 1/2E-8PT-5.5 1E-8PT-5.5 2E-8PT-5.5 3E-8PT-5.5 5E-8PT E-8PT-5.5 LCQ.5E LCQ 1E LCQ 2E LCQ 3E LCQ 5E LCQ 10E 1/2E 1E 2E 3E 5E 1/2E 1E 2E 3E 5E 10E ,500 37,500 37,500 37,500 37,500 37,500 37,500 37,500 37,500 37,500 37, Max. KV 1/2E-8PT E-8PT E-8PT E-8PT /2E 1E 2E 3E ,000 50,000 50,000 50, Max. KV 1/2E-11PT E-11PT E-11PT E-11PT E-16PT E-16PT-15.5 LCT.5E LCT 1E LCT 2E LCT 3E 1/2E 1E 2E 3E 3E 5E Max. KV 1/2E-16PT E-16PT-25.5 LCJ 1E-4 LCJ 2E-4 1/2E 1E ,500 43,500 71

130 Live Parts Live parts are available for mounting E, R, and PT single, double, and triple barrel fuses. Mounting clips are available for ferrule type and clip lock style fuses. All clips are sold in pairs. Contact factory for additional live parts. Part Number: * For use with all 13/16" diameter PT fuses Part Number: *.41 X1.06 SLOT For use with all 3 diameter fuses * One Pair * One Pair Part Number: CL* Clip Lock Design (For CL-) Mounting Details for Clip Lock 3.63 TRIPLE BARREL 3.63 DOUBLE BARREL Bottom Lever In Closed Position 4.85 SINGLE BARREL * One Pair Blown Fuse Indicator TOP VIEW Top Lever in Open Position A Dia. (2) Holes 2.00 For Mounting Cable/Bus.44 DIA. (2) HOLES 72

131 FUSES HHC MEDIUM VOLTAGE FUSES FOR CAPACITORS NORTH AMERICAN STYLE SIBA Capacitor protection fuses can easily be fitted direct onto capacitor bushings, because they are fitted with threaded holes at both ends. Their electrical characteristic suits the protection requirements of capacitors. The capacitor fuses are available in the following ratings: Voltage ratings: Amp. ratings: 4.8 / 7.2 / 15.5 kv A Features/Benefits Standards: IEC IEC High interrupting rating 63 ka Characteristic following capacitor protection needs for back up protection Suitable for direct fitting onto capacitor bushing Cartridge type current limiting Special mounting brackets available on request HHC 1

132 HHC FUSES Selection Guide Thread Rated Voltage Diameter Class Part No. Selector Techn. AC mm Guide Data kv Page Page 1/2 UNC Back up HHC 3 HHC 9 1/2 UNC Back up HHC 3 HHC 9 1/2 UNC Back up HHC 3 HHC 9 1/2 UNC Back up HHC 4 HHC 9 1/2 UNC Back up HHC 4 HHC 9 1/2 UNC Back up HHC 5 HHC 10 M Back up HHC 6 HHC 10 M Back up HHC 6 HHC 10 M Back up HHC 6 HHC 10 M Back up HHC 7 HHC 11 M Back up HHC 7 HHC 11 M Back up HHC 8 HHC 11 HHC 2

133 FUSES HHC MEDIUM VOLTAGE FUSES FOR CAPACITORS NORTH AMERICAN STYLE Rated voltage Class thread Standard AC 4.8 kv Back up 1/2 UNC IEC IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm capacity (kg/1) ka 6.3 A A A A A A A A A A A A A A A / E (254 mm) L (273 mm) F 1.57 (40 mm) E.13 (359 mm) L.88 (378 mm) F 1.57 (40 mm) HHC 3

134 HHC FUSES MEDIUM VOLTAGE FUSES FOR CAPACITORS NORTH AMERICAN STYLE Rated voltage Class thread Standard AC 7.2 kv Back up 1/2 UNC IEC IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm capacity (kg/1) ka 6.3 A A A A A A A A A A A A A A E (254 mm) L (273 mm) F 1.57 (40 mm) E.13 (359 mm) L.88 (378 mm) F 1.57 (40 mm) HHC 4

135 FUSES HHC MEDIUM VOLTAGE FUSES FOR CAPACITORS NORTH AMERICAN STYLE Rated voltage Class thread Standard AC 15.5 kv Back up 1/2 UNC IEC IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm capacity (kg/1) ka 6.3 A A A A A A A A A A A E.13 (359 mm) L.88 (378 mm) F 1.57 (40 mm) HHC 5

136 HHC FUSES MEDIUM VOLTAGE FUSES FOR CAPACITORS NORTH AMERICAN STYLE Rated voltage Class thread Standard AC 4.8 kv Back up M16 IEC IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm capacity (kg/1) ka 6.3 A A A A A A A A A A A A A A A / E (254 mm) L (273 mm) F 1.57 (40 mm) E.13 (359 mm) L.88 (378 mm) F 1.57 (40 mm) HHC 6

137 FUSES HHC MEDIUM VOLTAGE FUSES FOR CAPACITORS NORTH AMERICAN STYLE Rated voltage Class thread Standard AC 7.2 kv Back up M16 IEC IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm capacity (kg/1) ka 6.3 A A A A A A A A A A A A A A E (254 mm) L (273 mm) F 1.57 (40 mm) L1.13 (359 mm) L2.88 (378 mm) F 1.57 (40 mm) HHC 7

138 HHC FUSES MEDIUM VOLTAGE FUSES FOR CAPACITORS NORTH AMERICAN STYLE Rated voltage Class thread Standard AC 15.5 kv Back up M16 IEC IEC Rated Part No. D= Diameter Rated breaking Weight Pack current inch mm capacity (kg/1) ka 6.3 A A A A A A A A A A A E.13 (359 mm) L.88 (378 mm) F 1.57 (40 mm) HHC 8