Elastimold & Hi-Tech Fuse Products

Transcription

1 In this section... Elastimold & Hi-Tech Fuse Products Elastimold & Hi-Tech Fuse Products Overview...H-62 Elastimold Fused Loadbreak Elbows (FLE)... H-63 H-67 Elastimold Molded Current-Limiting Fuses (MCLF)... H-68 H-74 Elastimold Molded Canister Fuses (MCAN)... H-75 H-82 Hi-Tech OS Series Back-Up Current-Limiting Fuses... H-83 H-90 Hi-Tech EXT Series Back-Up Current-Limiting Fuses... H-91 H-94 Hi-Tech FX Series Full-Range Current-Limiting Fuses... H-95 H-102 Hi-Tech SX Series Full-Range Current-Limiting Fuses... H-103 H-108 Hi-Tech EX Series Full-Range Current-Limiting Fuses... H-109 H-112

2 Overview Capable of interrupting in elevated ambient temperature, Elastimold fuses are built tough to take the heat! Elastimold Fused Products cover a wide range of applications and ratings. Fused Elbows (FLR), Molded Current-Limiting Fuses (MCLF) and Molded Canister Fuses (MCAN) provide full-range protection through 50kA using Hi-Tech full-range fuses. The fuses in these products can easily be replaced with minimal downtime. Fused load-break elbows provide lowcost, convenient protection for radial taps, junctions, transformers and other equipment. They combine the advantages of full-range current-limiting fusing with the convenience of 15/25kV, 200A hotstick-operable, loadbreak elbow switching. MCLF and MCAN are suitable for single-phase tap/load protection and can be used in vault, subsurface or padmount installations. Elastimold Fused Products provide the benefits of current-limiting protection, with fault clearing occurring in less than one-half cycle,thereby limiting the let-through fault current and dramatically reducing stresses on equipment. They also provide both overload and fault current protection for distribution equipment in a single fuse body. As full-range fuses, they are capable of interrupting any continuous current between the minimum current Improve Loop System Reliability by Adding Protection to a Tap. Example: Underground Loop System B1 Breaker Locks Out NC NC Junction Cabinet Fault B2 NC that can cause melting of the elements and its rated maximum interrupting current (50,000A). All fuses are capable of interrupting in elevated ambient temperatures. Hi-Tech fuse design features include: A patented damage sensor that significantly reduces the risk of fuse failure should the fuse be subjected to an element-damaging current surge (e.g. lightning). Hermetically sealed construction ensures that no gases escape from the fuse during current interruption. All fuses are helium mass spectrometer leak tested to ensure sealing system integrity. Rugged machined-brass end caps used for greater ferrule strength, resulting in less distortion and a more secure fuse attachment. Elastimold FLR, MCLF and MCAN fused products constitute some of the fastest and easiest ways to improve system reliability. B1 Breaker Closed NC NC Junction Cabinet B2 Fuse Isolates Fault NC NOTE: NC = normally closed NO = normally opened NO 3-Way Unit NO 3-Way Unit B2 14 S3 B2 14 S3 B2 B2 I4 S3 Loop system without tap protection: A fault on the tap will lock out the substation breaker and create an outage for all customers to the open point. Loop system with tap protection: A fault on the tap will be isolated by the fuses. This reduces the number of customers affected by the outage, thus improving the System Average Interruption Frequency Index (SAIFI). Full-Range Current-Limiting Fuse Tin-Plated Brass Cap Low-Current Interruption Element (Includes Patented Damage Sensor) Mica Element Support High-Current Interruption Element Soldered Electrical Connection and Sealing.625" (15.9mm) Resin-Rich Filament Wound Glass/Epoxy Body Compacted Quartz Sand Welded Element Joints Epoxy Joint H-62

3 Elastimold Fused Loadbreak Elbows (FLE) The fastest, most cost-effective way to improve a distribution system s reliability. Elastimold Fused Elbows Combined full-range current-limiting fusing 15/25kV hotstick-operable, loadbreak elbow switching quickly improves the distribution system s reliability without the expense of adding a separate piece of switchgear or replacing existing sectionalizing cabinets Current-limiting fuses improve the fault close rating of the elbow (10kA) to that of the fuse, thereby reducing the risk of component damage or personnel injury EPDM molded rubber deadfront construction enables elbows to be fully sealed and submersible, and they insulate, shield and eliminate exposed live parts Two-piece housing enables easy fuse replacement Replace existing 200A tap elbows with Elastimold Fused Elbows to protect light-duty underground distribution systems, including sub-loops, radial taps, junctions, transformers and other equipment. Elastimold Fused Elbows provide full-range current-limiting fusing with 50kA interrupting capability. They are rated for 5kV ungrounded to 28kV grounded Wye. Plus they provide 15/25kV hotstick-operable, loadbreak elbow switching. Probe (166 LRF or 274 LRF) Probe Lug ( ) Upper Elbow Half Ratings System Voltage Class (kv) 15 25* 25/28* Nominal Fuse Voltage (kv) Rated Maximum Fuse Voltage (kv) 8.8/ Frequency (Hz) 50/60 50/60 50/60 BIL Impulse Withstand (kv) One-Minute AC Withstand (kv) Fifteen-Minute DC Withstand (kv) Corona Extinction (kv) Symmetrical Interrupting Capability (Amp) 50,000 50,000 50,000 Current Rating (Amp) Fuse Bi-Metal Crimp Lug (08605XXX) Hose Clamp Lower Elbow Half Application Information Construction: Submersible, non-venting, deadfront, corrosion resistant Ambient Temperature Range: -30 C to 65 C * The 15.5kV L-G rated fuse requires 75% grounded load to be applied on a 25kV system. The 17.2kV L-G rated fuse requires at least 75% grounded load to be applied on a 28kV system. Note: Fuses are only suitable for the system voltage class shown if the recovery voltage across the fuse will not exceed its rated maximum voltage. For three-phase applications, this generally requires that protected transformers be gndy gndy and have at least 50% grounded load. Fuse replacement requires the elbow to be de-energized. Certified Tests Elastimold Fused Elbows have been designed and tested per applicable portions of IEEE, ANSI and other industry standards, including: ANSI C37.40 Standard for Current-Limiting Fuse Service Conditions ANSI C37.41 Standard for Current-Limiting Fuse Design & Testing ANSI C37.47 Standard for Current-Limiting Fuse Ratings & Specifications IEEE 386 Standard for Separable Connectors H-63

4 Elastimold Fused Loadbreak Elbows (FLE) Electrical Characteristics of Elastimold EFX-E Elbow Fuses SYSTEM VOLTAGE CLASS (kv) NOMINAL FUSE VOLTAGE RATING (kv) CURRENT RATING (AMPS) FUSE CAT. NO. RATED MAXIMUM VOLTAGE (kv) MAXIMUM CONTINUOUS CURRENT (2) (6) (7) 25 C 40 C 65 C PEAK ARC VOLTAGE (kv) (5) MINIMUM MELT I 2 T (AMP 2 -SEC) MAXIMUM TOTAL I 2 T (AMP 2 -SEC) (3) (4) 3 EFX E EFX E ,700 8 EFX E , EFX E , EFX E , EFX E ,310 9, EFX E ,620 11, EFX E ,660 22, EFX E ,250 30, EFX E ,700 50, EFX E ,800 70, EFX E , , EFX E , ,000 6 EFX E ,000 8 EFX E , EFX E , EFX E , EFX E ,620 13, EFX E ,200 16,500 3 EFX E (1) EFX E ,250 8 EFX E , EFX E , EFX E ,500 25/ EFX E ,310 10, EFX E ,620 12, EFX E ,660 27, EFX E ,250 37, EFX E ,700 62, EFX E ,800 87,500 Notes: 1. Designs have a 50,000A RMS Symmetrical Rating (except 3A, 17.2kV which was tested at 44kA maximum). 2. Fuses have a Rated Maximum Application Temperature (RMAT) of 65 C. RMAT is the maximum temperature of the air, in contact with the elbow housing, at which fuses have been shown to be suitable for use. 3. Tabulated Maximum Total I 2 t values are for currents of 50,000A at the nominal voltage of the fuse. Values for 8.3kV fuses at 10kV are approximately 30% higher. Values for 17.2kV fuses at 15.5kV are approximately 20% lower. 4. Maximum total I 2 t values are reduced for currents below 50,000A. For example, at 10,000A, maximum total I 2 t values are approximately 15% less than the published values. 5. Peak arc voltages listed are for 50,000A currents at the rated maximum voltage listed. Reduced currents and voltages will reduce the peak arc voltage. Consult the factory for further information. 6. Maximum continuous currents at ambient temperatures other than those listed may be determined by derating the fuses by.2% per degree C over 25 C. For example: At 40 C the derating would be 15 x.2 = 3%, making the maximum continuous current of a 17.2kV, 25A fuse 31.5 x.97 = 30.5A. 7. Time-current characteristic curves are published at 25 C. Reduction in the long time melting current of the fuses (approximately one hour and longer) due to higher ambient temperatures is the same as described above for Maximum Continuous Currents. H-64

5 Elastimold Fused Loadbreak Elbows (FLE) Recommended Elastimold EFX-E Elbow Fuse at 40 C Ambient Temperature (Single-Phase Transformer) FUSE VOLTAGE RECOMMENDED FUSE CURRENT RATINGS (AMPERES) 8.3kV Recommended Elastimold EFX-E Elbow Fuse at 40 C Ambient Temperature (3-Phase Transformer) 15.5kV (17.2kV) TRANSFORMER 1-PHASE VOLTAGE RATING (kv) PHASE-TO-GROUND 1-PHASE TRANSFORMER kva A B A B A B A B A B A B A B A B a a 6 a (3 a ) a a 6 a (3 a ) a 6 a (3) a (6 a ) (6 a ) (8) (10) (25) (12) (20) (25) (45) 20 (30) (20) (30) (40) (30) (45) (25) (45) 500 (45) (45) RECOMMENDED FUSE CURRENT RATINGS (AMPERES) FUSE VOLTAGE 8.3kV 15.5kV (17.2kV) TRANSFORMER 3-PHASE VOLTAGE RATING (kv), PHASE TO PHASE 3-PHASE gndy-gndy TRANSFORMER kva A B A B A B A B A B A B A B A B A B a 3 a 6 a 6 a 6 a (3 a ) a 6 a a 6 a 6 a (3 a ) a 3 6 a 6 a 6 a (3 a ) a 6 a 6 a 6 a (3 a ) a (3) a (6 a ) (6 a ) (6) (8) (10) (12) (25) (18) (25) (25) (45) (25) (40) 1, (40) (40) Notes: 1. Column A = % of transformer rating and Column B = % of transformer rating. 2. Ratings in parenthesis are 17.2kV fuses kV, 3 45A fuses and 15.5kV, 6 20A fuses are used in the small (size 1) elbow housing; 8.3kV, 65 80A fuses and 17.2kV, 3 45A fuses are used in the large (size 3) elbow fuse housing. 4. Recommended fuses meet inrush criteria of 12 times transformer full-load current for.1 second and 25 times transformer full-load current for.01 second. Fuses also meet cold-load pickup criteria of 6 times transformer full-load current for 1 second and 3 times transformer full-load current for 10 seconds. a. Fuse allows greater than 300% of transformer rating. H-65

6 Elastimold Fused Loadbreak Elbows (FLE) Elastimold Fuse Housings The following diagram shows how to construct a catalog number for Fuse Housings. Nominal Fuse Voltage Rating Code 8.3kV kV kV 274 * Small Housing is used with 8.3kV (3 45A) and 15.5kV (6 20A) rated fuses. ** Large Housing is used with 8.3kV (65A and 80A) and 17.2kV (3 45A) rated fuses. 168FLR1 Indicates field that must be filled in to complete order. Fuse Test Port Two Direct Test Ports Two Capacitive Test Points Code A Blank Housing Code Small* 1 Large** 3 Cable Insulation Diameter Code.575".740" 15 19mm A.635".905" 16 23mm B.805" 1.060" 20 27mm C.890" 1.220" 25 31mm D 274FLR1 FLR - 5 Stranded/ Compressed 168FLR3 274FLR3 Conductor Size Size (AWG) Solid/ Compact Connector Code / /0 2/ /0 3/ /0 4/ /0 270 A = 8 7 8" (225mm) A = 9 1 4" (235mm) 8 7 8" (225mm) 9 1 4" (235mm) A 6 1 4" (159mm) 6 1 4" (159mm) " (270mm) " (270mm) " (270mm) Notes: 1. All dimensions rounded up to the nearest eighth inch. 2. Also available with direct test port. 3. Dimensions with Direct Test Port units are " (260mm) or " (270mm) FLR3 uses a large housing with a 15kV, 200A elbow interface " (270mm) H-66

7 Elastimold Fused Loadbreak Elbows (FLE) Elastimold Full-Range Current-Limiting Fuses The following diagram shows how to construct a catalog number for Full-Range Current-Limiting Fuses. Indicates field that must be filled in to complete order. Voltage Rating Code 8.3kV kV kV kV (3 45A)/15.5kV (6 20A) Fuse 9 1 4" (235mm) EFX - E Amperage Rating Code 3A 8.3/17.2kV 003 6A 8.3/15.5/17.2kV 006 8A 8.3/15.5/17.2kV A 8.3/15.5/17.2kV A 8.3/15.5/17.2kV A 8.3/15.5/17.2kV A 8.3/15.5/17.2kV A 8.3/17.2kV A 8.3/17.2kV A 8.3/17.2kV A 8.3/17.2kV A 8.3kV A 8.3kV " (54mm) 8.3kV (65 80A)/17.2kV (3 45A) Fuse 2 1 4" (54mm) " (343mm) Note: All dimensions rounded up to the nearest eighth inch. H-67

8 Elastimold Molded Current-Limiting Fuses (MCLF) You re covered. These fuses provide full-range protection through 50kA interrupting current. Molded Current-Limiting Fuses Molded Current-Limiting Fuses feature modular construction with a center replaceable fuse section and interchangeable end fittings for elbow connection or direct attachment to equipmentmounted bushings. The various end fittings enable fuses to be applied throughout the system, including switchgear, junctions, transformers, cable runs and taps. EPDM molded rubber deadfront construction insulates, shields and eliminates exposed live parts Lightweight fuses are fully sealed and submersible Specially designed fuse elements with built-in low- and high-current interrupting capability provide full-range fault current protection through 50kA Current-limiting protection limits the system available fault current and dramatically reduces stresses on equipment Internal fuse shield prevents corona and deterioration of the fuse element Modular construction with a center replaceable fuse section and interchangeable end fittings enables elbow connection or direct attachment to equipment-mounted bushings on junctions, transformers, cable runs and taps Compact suitable for padmount, subsurface or vault installations 304 stainless steel brackets and hold-down straps available accommodate a wide variety of mounting arrangements Elastimold Molded Current-Limiting Fuses are available in: 80A through 180A ratings for applications on 5kV systems 6A through 115A ratings for applications on 15kV grounded Wye systems 6A through 100A ratings for applications on 25kV grounded Wye systems 6A through 50A ratings for applications on 35kV grounded Wye systems H-68

9 Elastimold Molded Current-Limiting Fuses (MCLF) Ratings System Voltage Class (kv) /28* 35 Rated Maximum Fuse Voltage (kv) /10** 15.5/17.2** 23 Frequency (Hz) 50/60 50/60 50/60 50/60 BIL Impulse Withstand (kv) / One-Minute AC Withstand (kv) Fifteen-Minute DC Withstand (kv) Corona Extinction (kv) / Symmetrical Interrupting Capability (Amp) 50,000 50,000 50,000 50,000 Current Rating (Amp) Application Information Construction: Submersible, non-venting, deadfront, corrosion resistant Ambient Temperature Range: -30 C to 65 C for 6 50A fuses; -30 C to 40 C for >50A fuses. * 15.5kV L-G rated fuses require 75% grounded load to be applied on a 25kV system. ** 17.2kV L-G rated fuses require at least 75% grounded load to be applied on a 28kV system. Note: Fuse replacement requires the MCLF to be de-energized. Fuses are only suitable for the system voltage class shown if the recovery voltage across the fuse will not exceed its rated maximum voltage. For three-phase applications, this generally requires that protected transformers be gndy-gndy and have at least 50% grounded load. Certified Tests Elastimold Molded Current-Limiting Fuses have been designed and tested per applicable portions of IEEE, ANSI, NEMA and other industry standards, including: ANSI C37.40 Standard for Current-Limiting Fuse Service Conditions ANSI C37.41 Standard for Current-Limiting Fuse Design & Testing ANSI C37.47 Standard for Current-Limiting Fuse Ratings & Specifications ANSI/IEEE 386 Standard for Separable Connectors and Bushing Interfaces Interchangeable Molded Rubber End Fittings Replaceable Molded Rubber Current-Limiting Fuse Assembled Fuse Unit Assembled Fuse Unit with Optional Wall-Mounting Bracket H-69

10 Elastimold Molded Current-Limiting Fuses (MCLF) Electrical Characteristics of Encapsulated Fuses Used in MCLF (1) NOMINAL FUSE VOLTAGE RATING (kv) CURRENT RATING (AMPS) FUSE CAT. NO. RATED MAXIMUM VOLTAGE (kv) MAXIMUM CONTINUOUS CURRENT (2) (6) 25 C 40 C PEAK ARC VOLTAGE (kv) (5) MINIMUM MELT I 2 T (AMP 2 -SEC) MAXIMUM TOTAL I 2 T (AMP 2 -SEC) (3) (4) 80 M05CLF , , M05CLF , , M05CLF , , M05CLF , , M05CLF ,000 1,270, M15CLF , M15CLF ,620 11, M15CLF ,250 30, M15CLF ,700 50, M15CLF ,800 70, M15CLF , , M15CLF , , M15CLF , , M15CLF , , M25CLF , M25CLF ,620 10, M25CLF ,250 30, M25CLF ,700 50, M25CLF ,800 70, M25CLF , , M25CLF , , M25CLF , , M35CLF , M35CLF ,620 13, M35CLF ,250 38, M35CLF ,700 61, M35CLF ,800 82,000 Notes: 1. Designs have a 50,000A all U/CERMSs Symmetrical Rating A fuses have a Rated Maximum Application Temperature of 65 C, and A fuses have a Rated Maximum Application Temperature of 40 C. (RMAT is the maximum temperature of the air in contact with the MCLF housing at which the fuses have been shown suitable for use.) 3. Tabulated Maximum Total I 2 t values are for currents of 50,000A at the nominal voltage of the fuse. Fuses that have a Rated Maximum Voltage higher than their Nominal Voltage Rating will have a higher I 2 t let-through when applied at voltages up to these higher values. For example, Maximum Total I 2 t values are increased by approximately 30% when 8.3kV fuses are applied at 10kV and approximately 25% when 15.5kV fuses are used at 17.2kV. 4. Maximum total l 2 t values are reduced for currents below 50,000A. For example, at 10,000A, l 2 t values are approximately 15% less than the published values. 5. Peak arc voltages quoted are for 50,000A currents at the rated maximum voltage listed. Reduced currents and voltages will reduce the peak arc voltage. Consult the factory for further information. 6. Maximum continuous currents at higher ambient temperatures may be determined by derating the fuses by.2% per degree C over 25 C. For example: At 40 C, the derating would be 15 x.2 = 3%, making the maximum continuous current of a 20A fuse 23.0 x.97 = 22A. H-70

11 Elastimold Molded Current-Limiting Fuses (MCLF) Recommended MCLF at 40 C Ambient Temperature (Single-Phase Transformer) RECOMMENDED FUSE CURRENT RATINGS (AMPERES) FUSE VOLTAGE (5.5kV) 8.3kV 15.5kV 23kV TRANSFORMER 1-PHASE VOLTAGE RATING (kv) PHASE-TO-GROUND 1-PHASE TRANSFORMER kva A B A B A B A B A B A B A B A B A B a 10 a 10 a 10 a 10 a 10 a 10 a 10 a 10 a a 10 a 10 a 10 a 10 a 10 a 10 a 10 a a 10 a 10 a 10 a 10 a 10 a a 10 a 10 a 10 a a 10 a 10 a 10 a a (80) (100) (150) 65 (80) (150) (100) (125) (80) (100) (180) (125) (180) (100) (150) (180) (150) , Recommended MCLF at 40 C Ambient Temperature (3-Phase Transformer) RECOMMENDED FUSE CURRENT RATINGS (AMPERES) FUSE VOLTAGE (5.5kV) 8.3kV 15.5kV 23kV 3-PHASE TRANSFORMER 3-PHASE VOLTAGE RATING (kv), PHASE TO PHASE gndy-gndy TRANSFORMER kva A B A B A B A B A B A B A B A B A B A B a 10 a 10 a 10 a 10 a 10 a 10 a 10 a 10 a 10 a a 10 a 10 a 10 a 10 a 10 a 10 a 10 a 10 a a 10 a 10 a 10 a 10 a 10 a 10 a 10 a 10 a a 10 a 10 a 10 a 10 a 10 a 10 a a 10 a 10 a 10 a 10 a a 10 a 10 a a 10 a 10 a (80) a 10 a 10 a (100) a 225 (80) (125) a 300 (100) (150) 65 (100) 65 (80) (180) (100) (150) (100) (125) 65 (80) (180) (125) (180) (80) (125) ,000 (180) (125) (180) ,500 (180) , Notes: 1. Column A = % of transformer rating and Column B = % of transformer rating. 2. Ratings in parentheses are 5.5kV fuses. 3. Recommended fuses meet inrush criteria of 12 times transformer full-load current for.1 second and 25 times transformer full-load current for.01 second. Fuses also meet cold-load pickup criteria of 6 times transformer full-load current for 1 second and 3 times transformer full-load current for 10 seconds. a. Fuse allows greater than 300% of transformer rating. H-71

12 Elastimold Molded Current-Limiting Fuses (MCLF) Model 22 Model 222 Model 2222 Model 66 4" (102mm) " (343mm) " (422mm) " (343mm) " (422mm) " (702mm) " (422mm) " (498mm) " (422mm) 4" (102mm) 4" (102mm) 5 1 8" (130mm) 5 1 8" (130mm) 5 1 8" (130mm) 5 1 8" (130mm) " (208mm) Approx. Weight 30 lb. (13.6kg) " (208mm) Approx. Weight 35 lb. (15.9kg) " (233mm) " (208mm) Approx. Weight 40 lb. (18.1kg) 5 1 8" (130mm) Approx. Weight 40 lb. (18.1kg) Model 6E2 Lifting Eye 9 16" (14mm) x 1" (25mm) Mounting Slots on 5 1 2" (140mm) Centers " (572mm) " (473mm) 2 3 4" (70mm) " (283mm) 6 3 8" (162mm) 3 4" (19mm) Approx. Weight 30 lb. (13.6kg) H-72

13 Elastimold Molded Current-Limiting Fuses (MCLF) Model 6E " (283mm) Note: Other models are available such as 26. Lifting Eye 9 16" (14mm) x 1" (25mm) Mounting Slots on 5 1 2" (140mm) Centers 2 3 4" (70mm) 5 1 8" (130mm) 6 3 8" (162mm) Approx. Weight 30 lb. (13.6kg) " (572mm) " (473mm) 1 2" (13mm) Elastimold Molded Current-Limiting Fuses The following diagram shows how to construct a catalog number for a Molded Current-Limiting Fuse: Indicates field that must be filled in to complete order. M CLF - Voltage Class kv Code 5.0kV kV kV kV 35 See page H-70 for additional options. Mounting Brackets Wall Mounting Bracket with Parking Stands and Bolted Style Hold Down Straps (HDS) Wall Mounting Bracket with Parking Stands and Quick Release Style Hold Down Straps (QRS) See page H-74 for additional options. Bracket Code WMB WMBQ Amperes See page H-70 for additional options. Voltage Class 5kV 15kV 25kV 35kV Amperage Code Bushing Bushings Code 200A Bushing Wells both ends A Bushing Well on one end and two 200A Bushing 222 Wells on the other end Two 200A Bushing Wells on both ends A Bushings on both ends A Elbow Connector on one end and a 200A 6E2 Bushing Well on the other end 600A Elbow Connector on one end and a 600A 6E6 Bushing on the other end See outline drawings preceding this chart for additional details. H-73

14 Elastimold Molded Current-Limiting Fuses (MCLF) Mounting Options 5 1 2" (140mm) Approx. Weight 8 lb. (3.6 kg) Optional Fuse Mountings " (832mm) " (756mm) Optional WMB Mounting Bracket with Adjustable Parking Stands for Vertical Mounting and Fuse Hold-Down Strips 9 16" (14mm) x 1" (25mm) Mounting Slots 6 3 4" (171mm) 15 to 60 CAT. NO. DESCRIPTION HDS Bolted-Style Hold-Down Strap (Qty: 1 required per end fitting) QRS Quick-Release Style Hold-Down Strap (Qty: 1 required per end fitting) WMB Wall-Mounting Bracket with Parking Stands and Bolted-Style Hold-Down Straps WMBQ Wall-Mounting Bracket with Parking Stands and Quick-Release Style Hold-Down Straps SMB Support Mounting Bracket for use with Models 6E2 or 6E6 end-fitting arrangements; includes Bolted-Style Hold-Down Strap TMA-EM Tilt Mounting Adapter; bolts to bottom of Wall-Mounting Bracket WMB or WMBQ to enable up to 60 angle Note: The option number may be added as a suffix to the MCLF catalog number. Optional TMA Universal Tilt Mounting Optimal End Fittings CAT. NO. DESCRIPTION SYSTEM VOLTAGE CLASS IEEE INTERFACE REFERENCE EF2 200A Bushing Well End Fitting 5, 15, 25 Figure 3 EF22 Double 200A Bushing Well End Fitting 5, 15, 25 Figure 3 EF6 600A Bushing End Fitting 5, 15, 25 Figures 11 and 13 EF6E 600A Elbow Connector End Fitting 5, 15, 25 Figure 11 Note: EF6E is equipped with a standard through-hole spade lug (Type 03700). Use this table only if end fittings are to be ordered and shipped separately from the fuse. See pages H-72 H-73 for assembled units. 3 8" (10mm) Sq. Drive 3 16" (5mm) Hex Other Options CAT. NO. MCLF-ADT DESCRIPTION Hex Wrench for set screw removal and replacement when disassembling end fittings. Supplied as standard with replacement fuses. H-74

15 Elastimold Molded Canister Fuses (MCAN) Completely sealed and insulated for padmount, subsurface or vault applications through 28kV gndy gndy. MCAN Molded Canister Fuse EPDM molded rubber deadfront construction insulates, shields and eliminates live parts Fuses are fully sealed and submersible Modular construction enables elbow connection or direct attachment to equipment-mounted bushings Neon voltage indicators (V2) attached to elbow test points to provide quick and convenient blown-fuse indication Various end fittings and bushings make for flexible installation on switchgear, junctions, transformers, cable runs and taps Replaceable fuse enables easy fuse replacement without full removal from installation Current-limiting protection limits the system available fault current and dramatically reduces stresses on equipment 304 stainless steel mounting brackets and wall-mounted parking stands available to accommodate a wide variety of mounting arrangements The MCAN Molded Canister Fuse is a compact, lightweight EPDM molded rubber fuse enclosure package. MCAN fuse canisters are maintenance-free, completely sealed and submersible. Designs are deadfront, using molded rubber to insulate, shield and eliminate exposed live parts. Units are ideally suited for padmount, subsurface or vault applications, for systems through 28kV gndy gndy. The MCAN Molded Canister Fuse will accommodate and has been thoroughly tested with Hi-Tech Trans-Guard FX fuses. Contact Thomas & Betts before using fuses from other manufacturers. Fuse Canister Ratings System Voltage Class (kv) 15 25/28 Maximum Line-to-Ground Voltage (kv) 8.8/ /17.2 BIL Impulse Withstand (kv) /140 One-Minute AC Withstand (kv) Fifteen-Minute DC Withstand (kv) Corona Extinction (kv) Maximum Continuous Current (Amps) 200* 200* Momentary Current (ka) 10* 10* Fuse Ratings Nominal Voltage Rating (kv) Rated Maximum Voltage (kv) 8.8/ /17.2** 23.0 Frequency (Hz) Current Rating (Amps) Rated Maximum Interrupting 50,000 50,000 50,000 Current (Sym. Amps) Certified Tests Elastimold Molded Canister Fuses have been designed and tested per applicable portions of IEEE, ANSI, NEMA and other industry standards, including: ANSI C37.40 Standard for Current-Limiting Fuse Service Conditions ANSI C37.41 Standard for Current-Limiting Fuse Design & Testing ANSI C37.47 Standard for Current-Limiting Fuse Ratings & Specifications ANSI/IEEE 386 Standard for Separable Connectors & Bushing Interfaces Application Information Construction: Submersible, corrosion resistant, fully shielded Ambient Temperature Range: -30 C to 65 C * Without fuse. ** The 15.5kV L-G rated fuses require at least 75% grounded load to be applied on a 25kV system. Note: Fuse replacement requires the MCAN to be de-energized. H-75

16 Elastimold Molded Canister Fuses (MCAN) 600A Bushing 200A Bushing Wells 200A Bushing Well End Plug with Eye Cable Connection Bushings or Wells Molded EPDM Rubber Insulation and Shielding Latching Lever FX Full-Range Current-Limiting Fuse Mounting Feet 600A Elbow 200A Bushing Well Cable Connection Bushings or Wells FX Current-Limiting Fuse Tin-Plated Brass Cap Low-Current Interruption Element (Includes Patented Damage Sensor) Mica Element Support High-Current Interruption Element Soldered Electrical Connection and Sealing.625" (15.9mm) Resin-Rich Filament Wound Glass/ Epoxy Body Filled with Compacted Quartz Sand Welded Element Joints Epoxy Joint H-76

17 Elastimold Molded Canister Fuses (MCAN) Recommended FX: in MCAN at 40 C Ambient Temperature RECOMMENDED FUSE CURRENT RATINGS (AMPERES) FUSE VOLTAGE 8.3KV 15.5KV TRANSFORMER 1-PHASE VOLTAGE RATING (KV), PHASE TO GROUND 1-PHASE TRANSFORMER KVA A B A B A B A B A B A B A B A B a 3 3 a 3 a 3 a 3 a 3 a a a 3 a 3 a a 6 a 6 a a Recommended FX: in MCAN at 40 C Ambient Temperature RECOMMENDED FUSE CURRENT RATINGS (AMPERES) FUSE VOLTAGE 8.3KV 15.5KV 3-PHASE TRANSFORMER 3-PHASE VOLTAGE RATING (KV), PHASE TO PHASE GNDY-GNDY TRANSFORMER KVA A B A B A B A B A B A B A B A B A B a 3 a 3 a 3 a 6 a 3 a a 6 a a 3 a 6 a 3 a a 3 3 a 3 6 a 3 a a a 3 a a a 6 a a 6 a , , Notes: 1. Column A = % of transformer rating and Column B = % of transformer rating kV, 3 50A fuses are used in mounting code 4 canisters; 8.3kV 65 80A fuses and 15.5kV 3 50A fuses are used in mounting code 5 canisters; 15.5kV 65A fuse and 23kV 3 50A fuses are used in mounting code 6 canisters. 3. Recommended fuses meet inrush criteria of 12 times transformer full-load current for.1 second and 25 times transformer full-load current for.01 second. Fuses also meet cold-load pickup criteria of six times transformer full-load current for 1 second and three times transformer full-load current for 10 seconds. a. Fuse allows greater than 300% of transformer rating. H-77

18 Elastimold Molded Canister Fuses (MCAN) Electrical Characteristics of Hi-Tech FX Fuses inside MCAN Canisters NOMINAL FUSE VOLTAGE RATING (kv) CURRENT RATING (AMPS) FUSE CAT. NO. RATED MAXIMUM VOLTAGE (kv) MAXIMUM CONTINUOUS CURRENT (2) (6) 25 C 40 C 65 C PEAK ARC VOLTAGE (kv) (5) MINIMUM MELT I 2 T (AMP 2 -SEC) MAXIMUM TOTAL I 2 T (AMP 2 -SEC) (3) (4) 3 HTFX HTFX ,700 8 HTFX , HTFX , HTFX , HTFX ,310 9, HTFX ,620 11, HTFX ,660 22, HTFX ,250 30, HTFX ,700 50, HTFX ,800 70, HTFX , , HTFX , ,000 3 HTFX (1) HTFX ,600 8 HTFX , HTFX , HTFX , HTFX ,310 8, HTFX ,620 10, HTFX ,660 22, HTFX ,250 30, HTFX ,700 50, HTFX ,800 70, HTFX , ,000 6 HTFX ,100 8 HTFX , HTFX , HTFX , HTFX ,310 11, HTFX ,620 13, HTFX ,660 28, HTFX ,250 38, HTFX ,700 61, HTFX ,800 82,000 Notes: 1. Designs have a 50,000A RMS Symmetrical Rating (except for 3A, 15.5kV which was tested at 44kA maximum). 2. Fuses have a Rated Maximum Application Temperature of 65 C. (RMAT is the maximum temperature of the air in contact with the MCAN housing, at which fuses have been shown to be suitable for use.) 3. Tabulated Maximum Total I 2 t values are for currents of 50,000A at the nominal voltage of the fuse. Fuses that have a Rated Maximum Voltage higher than their Nominal Voltage Rating will have a higher I 2 t let-through when applied at voltages up to these higher values. For example, Maximum Total I 2 t values are increased by approximately 30% when 8.3kV fuses are applied at 10kV and approximately 25% when 15.5kV fuses are used at 17.2kV. 4. Maximum total I 2 t values are reduced for currents below 50,000A. For example, at 10,000A, maximum total I 2 t values are approximately 15% less than the published values. 5. Peak arc voltages quoted are for 50,000A currents at the rated maximum voltage listed. Reduced currents and voltages will reduce the peak arc voltage. Consult the factory for further information. 6. Maximum continuous currents at higher ambient temperatures may be determined by de-rating the fuses by.2% per degree C over 25 C. For example: At 65 C, the de-rating would be 40 x.2 = 8%, making the maximum continuous current of a 30A fuse 34 x.92 = 31A. 7. Reduction in the long time melting current of the fuses (approximately one hour and longer) due to higher ambient temperatures is the same as described above in Note #6. See time-current characteristics for melting characteristics in this time region. H-78

19 Elastimold Molded Canister Fuses (MCAN) FX Fuses and MCAN Fuse Canisters To specify and order an FX fuse and an MCAN fuse canister: 1. Select the Fuse Catalog Number from the Electrical Characteristics of the Hi-Tech FX Fuses Inside MCAN Canisters chart on page H-78, based on the amperage and Rated Maximum Voltage (kv) column. 2. Based on selected fuse, select canister from the Canister Catalog Number column of the Elastimold FX Fuses with MCAN table on page H-80. See weights and dimensions table on page H-81 for additional MCAN Fuse Canister information. (Make sure that the Canister Mounting Code and Diameter Code correspond to the Fuse selected.) MCAN Fuse Coding System MOUNTING CODE MAXIMUM FUSE OVERALL LENGTH 3. Select options and accessories (if required) from page H-82. Example: To order a 15.5kV, 50A fuse, a fuse canister for this fuse with a 200A bushing well and no options or accessories, specify: Catalog No. HTFX and MCAN-5B DIAMETER CODE MAXIMUM FUSE OVERALL DIAMETER " (254mm) B 2.25" (57mm) " (363mm) B 2.25" (57mm) " (435mm) B 2.25" (57mm) Note: Lower Mounting Codes (shorter) fuses may be applied in canisters of higher Mounting Codes by using an adapter. See Mounting Code Adapters on page H-82. H-79

20 Elastimold Molded Canister Fuses (MCAN) Hi-Tech FX Fuses with MCAN A NOMINAL FUSE VOLTAGE RATING (kv) CURRENT RATING (AMPS) FUSE CAT. NO. 3 HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX RATED MAXIMUM VOLTAGE (kv) MOUNTING CODE DIAMETER CODE B B B 65 HTFX B 6 HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX Note: For 5kV systems, use the 8.3kV rated fuses B B D (A) OVERALL DIAMETER IN. (MM) 2.25 (57) 2.25 (57) 2.25 (57) 2.25 (57) 2.25 (57) (B) OVERALL LENGTH IN. (MM) 10.0 (254) (363) (363) (435) (435) (C) CONTACT LENGTH IN. (MM) 1.02 (26) 1.02 (26) 1.02 (26) 1.02 (26) 1.02 (26) (D) BODY LENGTH IN. (MM) 7.96 (202) (312) (312) (383) (383) CANISTER CAT. NO. MCAN-4B15-22 MCAN-4B15-66 MCAN-4B15-6E2 MCAN-4B15-6E6 MCAN-5B15-22 MCAN-5B15-66 MCAN-5B15-6E2 MCAN-5B15-6E6 MCAN-5B25-22 MCAN-5B25-66 MCAN-5B25-6E2 MCAN-5B25-6E6 MCAN-6B25-22 MCAN-6B25-22 C FUSE WEIGHT LB. (KG) 3.00 (1.3) 4.25 (1.9) 4.25 (1.9) 4.75 (2.2) 4.75 (2.2) H-80

21 Elastimold Molded Canister Fuses (MCAN) " Model 22 A " (148mm) B Model " (152mm) " (204mm) " (227mm) 15 32" (12mm) 2 3 4" (70mm) " (82mm) C 15 32" (12mm) " (82mm) 2 3 4" (70mm) (164mm) 5 1 2" (140mm) " (164mm) 5 1 2" (140mm) Model 6E2 A Model 6E " (152mm) B " (152mm) " (204mm) " (227mm) " (82mm) C 15 32" (12mm) " (82mm) 15 32" (12mm) 2 3 4" (70mm) 2 3 4" (70mm) " (164mm) 5 1 2" (140mm) " (164mm) 5 1 2" (140mm) A B A B C C Weights and Dimensions APPROX. WEIGHT CAT. NO. A IN. (MM) B IN. (MM) C IN. (MM) LB. (KG) END BUSHING MAIN BUSHING MCAN-4B (546) (256) (277) 19 (8.6) 200A Bushing Well 200A Bushing Well MCAN-5B (655) (365) (387) 21 (9.5) 200A Bushing Well 200A Bushing Well MCAN-5B (655) (365) (387) 21 (9.5) 200A Bushing Well 200A Bushing Well MCAN-4B (546) (256) (277) 21 (9.5) 600A Bushing 600A Bushing MCAN-5B (655) (365) (387) 23 (10.4) 600A Bushing 600A Bushing MCAN-5B (655) (365) (387) 23 (10.4) 600A Bushing 600A Bushing MCAN-4B15-6E (607) (256) (328) 20 (9) 600A Elbow Connector 200A Bushing Well MCAN-5B25-6E (717) (365) (437) 22 (10) 600A Elbow Connector 200A Bushing Well MCAN-5B15-6E (717) (365) (437) 22 (10) 600A Elbow Connector 200A Bushing Well MCAN-4B15-6E (607) (256) (328) 20 (9) 600A Elbow Connector 600A Bushing MCAN-5B25-6E (717) (365) (437) 22 (10) 600A Elbow Connector 600A Bushing MCAN-5B15-6E (717) (365) (437) 22 (10) 600A Elbow Connector 600A Bushing H-81

22 Elastimold Molded Canister Fuses (MCAN) MCAN Molded Canister Fuse Options and Accessories Voltage Indicators Neon voltage indicators provide quick and convenient indication of an energized circuit when they are mounted to the test-point provision on MCAN elbow connectors. The voltage indicator illuminates with a flashing neon light when the elbow connector is energized. If the fuse blows, the neon lights on the load-side elbows stop flashing. CAT. NO. V2 DESCRIPTION Capacitive Test Point, Voltage Indicator Mounting Code Adapters A mounting code adapter is used to extend the fuse end cap ferrule so that a shorter fuse may be installed in a higher-number coded canister. For example, a 4B size fuse can be used in a 5B canister when an MCAN 4-5 adapter is used. CAT. NO. MCAN 4-5 MCAN 4-6 MCAN 5-6 DESCRIPTION Code 4B Size Fuse to a Code 5B Canister Code 4B Size Fuse to a Code 6B Canister Code 5B Size Fuse to a Code 6B Canister Parking Stands Parking stands can be mounted adjacent to an MCAN Fuse Canister, enabling attachment of additional accessories to ground, isolate and test the elbow cable connectors. CAT NO. 160WMPS SUFFIX NO. -PS DESCRIPTION Wall-Mount Parking Stand DESCRIPTION Parking Stand between Bushings Switchgear Assemblies Elastimold multi-point junctions can be utilized to create custom switchgear lineups consisting of MVS switches, MVI fault interrupters, MCLF current-limiting fuses, MCAN fuse canisters, fused elbows, elbow arresters and other molded products. The junction enables easy assembly and interconnection of components into fully shielded, submersible, compact arrangements. H-82

23 Hi-Tech OS Series Back-Up Current-Limiting Fuses Trans-Guard OS Shorty Fuse Highest current ratings available in a single fuse body minimizes the costs and physical space associated with paralleling two fuses to achieve the desired current rating Smaller physical size allows for easier installation Rigorous testing to meet ANSI/IEEE standards Durable design features machined brass end caps, filament-wound high-temperature epoxy tubular bodies, sand filler and a hermetic sealing system High fault current interrupting capability 50,000 amperes symmetrical for most ratings Broad range of fuse ratings 30 amps 400 amps Elevated rated maximum voltage 10kV,17.2kV, 25.5kV and 38kV for many designs The Trans-Guard OS Shorty is a back-up type current-limiting fuse designed for application within distribution transformers. Its ability to significantly reduce fault energy and its very high interrupting capability (50,000 amperes symmetrical) provide state-of-the-art protection against today s everincreasing available fault currents. OS Shorty fuses are compact in size and allows for easier installation in smaller distribution transformers. As a back-up type current-limiting fuse (refer to ANSI C37.40 for fuse definitions), the Trans-Guard OS Shorty must always be applied in series with a properly sized low-current protective device. This device is typically an under-oil expulsion fuse (i.e. Bay-O-Net fault or load sensing link, terminal board weak link, etc.). The expulsion fuse and the current-limiting fuse are each selected to provide fault protection over a certain range of currents. The expulsion fuse is chosen to clear the low-magnitude currents such as those caused by faults that occur external to the transformer, high-impedance faults within the transformer, and in the case of load sensing links, transformer overloads. Such currents are generally below the minimum interrupting current rating of the current-limiting fuse. The back-up type current-limiting fuse is selected so as to clear all other currents. In addition to interrupting the fault currents resulting from low-impedance faults within the transformer, the back-up current-limiting fuse serves the very important function of limiting the amount of energy that is let through to the source of the fault to a value below the withstand capability of the transformer tank. By doing this, the current-limiting fuse minimizes the likelihood of disruptive equipment failures (i.e. transformer tank ruptures, accessories being damaged or broken loose from their mountings, etc.). No other protective device is available to similarly reduce the risk of disruptive transformer failures. H-83

24 Hi-Tech OS Series Back-Up Current-Limiting Fuses threaded hole 1 2" deep (both ends) Dimensional Information NOMINAL FUSE VOLTAGE RATING (KV) CURRENT RATING (AMPS) FUSE CAT. NO. 40 HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS HTSS Note: Other hardware is available consult the factory. OVERALL DIAMETER (A) " ( mm) " ( mm) " ( mm) " ( mm) B C OVERALL LENGTH (B) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) BODY LENGTH (C) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) A FUSE WEIGHT 2.25 lb. 1.02kg 2.5 lb. 1.13kg 3.25 lb. 1.45kg 2.75 lb. 1.25kg 3.75 lb. 1.70kg 4.75 lb. 2.15kg 3.75 lb. 1.70kg 4.75 lb. 2.15kg 12.0 lb. 5.44kg 13.5 lb. 6.12kg H-84

25 Hi-Tech OS Series Back-Up Current-Limiting Fuses Electrical Characteristics (Single Fuses) NOMINAL FUSE VOLTAGE RATING (KV) CURRENT RATING (AMPS) FUSE CAT. NO. RATED MAXIMUM VOLTAGE (KV) PEAK ARC VOLTAGE (KV) (4) MINIMUM I/C (AMPS) MINIMUM MELT I 2 T (AMP 2 -SEC) MAXIMUM TOTAL I 2 T (AMP 2 -SEC) (2) (3) 40 HTSS ,140 10, HTSS ,500 14, HTSS ,700 18, HTSS ,300 31, HTSS ,800 66, HTSS , , HTSS , , HTSS ,020 39, , HTSS ,120 54, , HTSS ,260 6, HTSS ,680 12, HTSS ,440 17, HTSS ,700 22, HTSS ,300 36, HTSS ,800 76, (1) HTSS ,800 66, (1) HTSS , , (1) HTSS , , HTSS , HTSS ,580 9, HTSS ,200 20, HTSS ,700 17, HTSS ,300 28, HTSS ,800 70, HTSS ,600 12, HTSS ,600 23, HTSS ,500 36, HTSS ,300 68, HTSS ,200 43, ,000 Notes: (1) These fuses have only been tested at a rated maximum interrupting current of 44,000A RMS symmetrical. All other fuses have a rated maximum interrupting current of 50,000A RMS symmetrical. (2) Tabulated maximum total I 2 t values are at the nominal voltage of the fuse. Values for 17.2kV fuses at 15.5kV are reduced by approximately 12%, while values for 8.3kV and 23kV fuses at 10kV and 25.5kV are increased by approximately 30% and13% respectively. (3) Maximum total I 2 t values are reduced for currents below 50,000A. For example, at 10,000A, maximum total I 2 t values are approximately 15% less than the published values. (4) Peak arc voltages quoted are for 50,000A currents at the rated maximum voltage listed. Reduced voltages and currents will reduce the peak arc voltage. Consult the factory for information. H-85

26 Hi-Tech OS Series Back-Up Current-Limiting Fuses Electrical Characteristics (Fuses Tested for Use in Parallel) NOMINAL FUSE VOLTAGE RATING (KV) CURRENT RATING (AMPS) (2) FUSE CAT. NO. (ORDER TWO FUSES) RATED MAXIMUM VOLTAGE (KV) PEAK ARC VOLTAGE (KV) (5) MINIMUM L/C (AMPS) MINIMUM MELT I 2 T (AMP 2 -SEC) MAXIMUM TOTAL I 2 T (AMP 2 -SEC) (3) (4) 130 HTSS ,800 65, HTSS , , HTSS , , HTSS ,900 92, , HTSS , , , HTSS , , , HTSS ,800 92, HTSS , , HTSS , , (1) HTSS ,130 59, , (1) HTSS , , , HTSS , , , HTSS ,800 68, HTSS , , HTSS , ,000 Notes: (1) These fuses have only been tested at a rated maximum interrupting current of 44,000A RMS symmetrical due to test station limitations. All other fuses have a rated maximum interrupting current of 50,000A RMS symmetrical. (2) Current ratings shown above are achieved by using a parallel combination of two fuses (order two fuses). To facilitate equal sharing of the interrupting duty, the two fuses should be resistance matched (±2%) and be mounted such that current paths to and from each fuses are symmetrical. (3) Tabulated maximum total I 2 t values are at the nominal voltage of the fuse. Values for 17.2kV fuses at 15.5kV are reduced by approximately 12%, while values for 23kV fuses at 25.5kV are increased by approximately 13%. (4) Maximum total I 2 t values are reduced for currents below 50,000A. For example, at 10,000A, maximum total I 2 t values are approximately 15% less than the published values. (5) Peak arc voltages quoted are for 50,000A currents at the rated maximum voltage listed. Reduced voltages and currents will reduce the peak arc voltage. Consult the factory for information. H-86

27 Hi-Tech OS Series Back-Up Current-Limiting Fuses Fuse Selection For a detailed explanation on selecting the appropriate backup current limiting fuse for a given application, please refer to Hi-Tech Fuses Application Bulletin FS-10. For a quicker method of selecting the proper Trans-Guard OS Shorty Fuse for applications involving coordination with Bay-O-Net expulsion fuses and transformers having impedances equal to or higher than those listed below, refer to the fuse coordination chart below and on pages H-88 H-90. These charts include columns that specify OS Shorty Fuses for each application. More comprehensive charts listing fusing alternatives for transformers having any impedance can be found at /utility. Assumed Transformer Impedances Used for Fuses Coordination TRANSFORMER SIZE (kva) 1 IMPEDANCES (%) 3 IMPEDANCES (%) and up H-87

28 Hi-Tech OS Series Back-Up Current-Limiting Fuses Single-Phase Transformer Coordination for Expulsion & Trans-Guard OS Shorty Fuses FUSE VOLTAGE TRANS-GUARD OS SHORTY FUSE VOLTAGE RATING (KV) 8.3kV 15.5/17.2kV 23kV TRANSFORMER VOLTAGE RATING (KV) PHASE-TO-GROUND LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY kva Dual Sensing Bay-O-Net ( ) a,c and OS Shorty Fuse Coordinations 5 C03 40 C03 40 C03 40 C03 30 C03 30 C03 30 C C05 40 C05 40 C03 40 C03 30 C03 30 C03 30 C C08 65 C05 40 C03 40 C03 30 C03 30 C03 30 C C C08 65 C05 40 C03 30 C03 30 C03 30 C C C C08 50 C05 30 C05 30 C03 30 C C C C08 65 C05 30 C05 30 C05 30 C C14 300* C C C08 65 C08 50 C08 50 C C14 330* C C C08 80 C08 65 C08 65 C C14 300* C C C C C C18 330* C C C C C C18 330* C C C C C C18 330* C C C C12 130* kva Current Sensing Bay-O-Net ( ) a,b and OS Shorty Fuse Coordinations 5 C04 40 C04 40 C04 40 C04 30 C04 30 C04 30 C C06 40 C04 40 C04 40 C04 30 C04 30 C04 30 C C08 40 C06 40 C04 40 C04 30 C04 30 C04 30 C C10 80 C08 40 C06 40 C04 30 C04 30 C04 30 C C C08 65 C06 40 C06 30 C06 30 C04 30 C C C C08 40 C06 30 C06 30 C06 30 C C C C10 80 C08 40 C08 40 C06 30 C C C C C08 50 C08 40 C08 40 C C17 300* C C C10 80 C10 80 C10 65 C C C C C C10 65 C C17 300* C C C C C C17 300* C C C C kva Dual Element Bay-O-Net ( ) a,c and OS Shorty Fuse Coordinations 5 C03 40 C03 40 C03 40 C03 30 C03 30 C03 30 C C05 40 C04 40 C03 40 C03 30 C03 30 C03 30 C C07 50 C05 40 C03 40 C03 30 C03 30 C03 30 C C C06 40 C04 40 C03 30 C03 30 C03 30 C C C09 80 C06 40 C05 30 C04 30 C03 30 C C C C07 50 C06 40 C05 30 C04 30 C C C C07 50 C06 40 C06 40 C C C C09 80 C07 65 C07 50 C C C C09 80 C07 65 C C C C C C C Notes: Bay-O-Net fuse selection is based on Cooper Power Systems recommendations. Bay-O-Net fuses are selected to meet inrush criteria of 12 times transformer full load current for.1 second. Backup OS Shorty fuses are selected to melt only on internal transformer faults, where transformer impedance is equal to or greater than the value given in chart on page H-87. If the impedance is higher, a smaller fuse can often be used. * Indicate parallel fuse applications. a. Or equivalent Bay-O-Net link. b. Current Sensing Bay-O-Net fuses are selected to melt with three to four times transformer full load current at 300 seconds. c. Dual Sensing and Dual Element Bay-O-Net fuses are selected to limit transformer load to approximately 160% for seven hours and 200% for two hours with the transformer initially carrying 75% of load at an ambient temperature of 35 C. H-88

29 Hi-Tech OS Series Back-Up Current-Limiting Fuses 3-Phase Transformer Coordination for Expulsion and Trans-Guard OS Shorty Fuses TRANS-GUARD OS SHORTY FUSE VOLTAGE RATING (kv) 8.3kV 15.5/17.2kV 23kV kva TRANSFORMER VOLTAGE RATING (kv) PHASE-TO-PHASE d 24.9 d d 34.5 d LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY Dual Sensing Bay-O-Net ( ) a,c and OS Shorty Fuse Coordinations 45 C C08 65 C05 40 C03 30 C03 30 C03 30 C03 30 C03 30 C03 30 C C C C08 65 C05 30 C05 30 C03 30 C03 30 C03 30 C03 30 C C14 300* C C08 80 C08 50 C08 50 C05 30 C05 30 C05 30 C05 30 C C14 300* C C C08 65 C08 65 C05 30 C05 30 C05 30 C05 30 C C18 400* C14 300* C C C10 80 C08 50 C08 50 C08 65 C08 65 C C18 400* C14 300* C C C C08 50 C08 50 C08 65 C08 65 C C18 400* C C C C10 80 C10 80 C10 80 C10 80 C C18 400* C18 330* C C C C C12 e 130* C10 80 C C18 330* C C C C C12 e 130* C12 130* C C18 d 300* C18 d 300* C C C14 e 200* C14 200* C12 130* 2000 C C14 200* C14 200* Current Sensing Bay-O-Net ( ) a,b and OS Shorty Fuse Coordinations 45 C C08 40 C06 40 C04 30 C04 30 C04 30 C04 30 C04 30 C04 30 C C C C06 40 C06 30 C06 30 C04 30 C04 30 C04 30 C04 30 C C C C08 65 C06 40 C06 30 C06 30 C04 30 C04 30 C04 30 C C C C C08 40 C08 40 C06 30 C06 30 C06 30 C06 30 C C C C C10 65 C10 65 C08 40 C08 30 C08 30 C06 30 C C17 300* C C C10 80 C10 65 C08 40 C08 30 C08 30 C08 30 C C17 300* C C C C10 65 C10 65 C10 65 C10 65 C C17 300* C C C C12 80 C12 80 C12 80 C10 65 C C17 300* C C C C C C12 80 C C16 250* C16 250* C C C14 e 160* C14 160* C C17 e 300* C16 250* C16 250* C16 e 200* C14 160* C14 160* 2500 C17 e 300* C16 250* Dual Element Bay-O-Net ( ) a,c and OS Shorty Fuse Coordinations 45 C C07 65 C04 40 C03 30 C03 30 C03 30 C03 30 C03 30 C03 30 C C C C06 40 C04 30 C04 30 C03 30 C03 30 C03 30 C03 30 C C C07 65 C06 40 C06 40 C05 30 C04 30 C04 30 C03 30 C C C C07 50 C07 50 C06 40 C05 30 C05 30 C04 30 C C C09 65 C09 65 C07 50 C06 30 C06 40 C06 40 C C C09 80 C09 80 C09 65 C07 50 C07 50 C07 50 C C C C11 80 C09 65 C C C C Notes: Bay-O-Net fuse selection is based on Cooper Power Systems recommendations. Bay-O-Net fuses are selected to meet inrush criteria of 12 times transformer full load current for.1 second. Backup OS Shorty fuses are selected to melt only on internal transformer faults, where transformer impedance is equal to, or greater than, the value given on page H-87. If the impedance is higher, a smaller fuse can often be used. * Indicates parallel fuse applications. a. Or equivalent bayonet link. b. Current Sensing Bay-O-Net fuses are selected to melt with three to four times transformer full load current at 300 seconds. c. Dual Sensing and Dual Element Bay-O-Net fuses are selected to limit transformer load to approximately 160% for seven hours and 200% for two hours with the transformer initially carrying 75% of load at ambient temperature of 35 C. d. Applications are limited to gnd Y-gnd Y connected transformers with no more than 50% delta connected secondary load. Phase-to-ground rated fuses are frequently recommended for gnd Y-gnd Y connected transformers. e. Bay-O-Net assembly may be subjected to damage during fault clearing at currents above the Bay-O-Net s Maximum I/C. H-89

30 Hi-Tech OS Series Back-Up Current-Limiting Fuses Single-Phase Transformer Coordination for Cooper High Ampere Overload Bay-O-Net ( _CB) & Trans-Guard OS Shorty Fuses Fuse Voltage TRANS-GUARD OS SHORTY FUSE VOLTAGE RATING (kv) 8.3kV 15.5/17.2kV TRANSFORMER VOLTAGE (kv) PHASE-TO-GROUND kva LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY 75 C C C04 300* C C05 300* C C05 300* C C05 300* C C C C05 300* C C Phase Transformer Coordination for Cooper High Ampere Overload Bay-O-Net ( _CB) & Trans-Guard OS Shorty Fuses Fuse Voltage 8.3kV TRANS-GUARD OS SHORTY FUSE VOLTAGE RATING (kv) 15.5/17.2kV TRANSFORMER VOLTAGE RATING (kv) PHASE-TO-PHASE kva a 24.9 a LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY LINK SHORTY C C C C04 300* C C05 300* C C C05 300* C C C C C C05 300* C C C C C05 250* C05 250* C C C05 b 300* C05 b 300* C C Notes: Bay-O-Net fuse selection is based on Cooper Power Systems recommendations. Bay-O-Net fuses are selected to meet inrush criteria of 12 times transformer full load current for 0.1 second. Backup OS Shorty fuses are selected to melt only on internal transformer faults, where transformer impedance is equal to, or greater than, the value given on page H-87. If the impedance is higher, a smaller fuse can often be used. * Indicates parallel fuse applications. High Ampere Overload Bay-O-Net fuses are selected to limit transformer load to approximately 160% for seven hours and 200% for two hours with the transformer initially carrying 75% of load at ambient temperature of 35 C. a Applications are limited to gnd Y-gnd Y connected transformers with no more than 50% delta connected secondary load. Phase-to-ground rated fuses are frequently recommended for gnd Y-gnd Y connected transformers. b Bay-O-Net assembly may be subjected to damage during fault clearing at currents above the Bay-O-Net s maximum I/C. ABB 34.5kV Protective Links (345B995G ) & 38kV Trans-Guard OS Shorty Fuses ASSUMED TRANSFORMER VOLTAGE (KV) L-L kva IMPEDANCE Z% LINK SHORTY LINK SHORTY LINK SHORTY A 65 3A A A A A A Note: Backup fuses are selected to melt only on internal transformer faults, where transformer impedance is equal to, or greater than, the value given. For transformers having lower impedances, consult the factory. H-90

31 Hi-Tech EXT Series Back-Up Current-Limiting Fuses Minimize energy let-through maximize equipment protection. Trans-Guard EXT Current- EXPULSION FUSE OPERATION Limiting Backup Fuse In addition to interrupting higher fault currents, the Trans-Guard EXT Current-Limiting Backup Fuse serves the very important function of limiting the amount of energy let-through to the source of the fault to a value below the withstand capability of the equipment being protected. New and improved design offers you: Smaller size and lighter weight for easier handling Lowest energy let-through in the industry The most complete range of ratings available Lowest total I 2 t let-throughs in the industry provide maximum protection for equipment by minimizing energy let-through during a fault Higher melt I 2 t s on smaller fuse ratings make fuses less susceptible to damage from current surges High fault interrupting capability as high as 50kA symmetrical Shorter, lighter weight design makes fuses easy to handle and install Integral pre-assembled hardware reduces installation time and likelihood of joint deterioration Application Designed to enhance protection on overhead distribution systems, the Trans-Guard EXT Current-Limiting Backup Fuse both significantly reduces energy let-through during a fault and offers very high interrupting capability to provide state-of-the-art protection against today s ever-increasing available fault currents. Current peak Current interruption Durable design features machined brass endcaps and filament-wound epoxy, centerless ground tubular bodies coated with oven-baked acrylic paint Broadest range of ratings available up to 100K at 8.3kV and 15.5kV; up to 80K at 23kV Current-limiting action improves power quality by reducing voltage dip time during a fault and reduces flame discharge and noise associated with the operation of the series-connected cutout fuse Wide variety of mounting and connection options for greater flexibility in installation 100% leak tested to ensure hermetic sealing Reduced energy let-through provides arc flash reduction SOURCE Source SIDE Side CUTOUT Cutout INSTALLATION Installation Type of Installations CURRENT-LIMITING FUSE OPERATION Current peak Current interruption Fuse Current Fault Current Energy Let-Through BUSHING MOUNT Bushing INSTALLATION Mount Installation LOAD Load SIDE Side CUTOUT Cutout INSTALLATION Installation HOT-LINE/BAIL Hot-Line/Bail Installation INSTALLATION Note: The Trans-Guard EXT Current-Limiting Backup Fuse interrupts high-level currents and must be applied in series with another device capable of interrupting low- to mid-level currents. This is most commonly a cutout expulsion fuse. When properly coordinated, the Trans-Guard EXT Current-Limiting Backup Fuse always allows sufficient let-through current to cause the cutout fuse to melt and drop open, making it easy to visually pinpoint where the fault occurred. H-91

32 Hi-Tech EXT Series Back-Up Current-Limiting Fuses Trans-Guard EXT Current-Limiting Backup Fuse for 12K 40K Ratings Ordering Information BASE CAT. NO.* HTDE23 (X) 012 Hardware for 12K 40K Ratings 1.3" NOMINAL VOLTAGE RATING (kv) 2.7" B DIMENSION A (INCHES) 1.3" DIMENSION B (INCHES) CURRENT RATING 12K HTDE23 (X) K HTDE23 (X) K HTDE24 (X) K HTDE24 (X) K HTDE24 (X) K HTDE25 (X) K HTDE25 (X) K HTDE25 (X) K * When ordering, replace the (X) in the Base Catalog Number with the appropriate Hardware Code from the chart below. 1.1" or 1.5" A WEIGHT (LBS.) 1.1" for 1.5" dia. fuses 1.5" for 2.2" dia. fuses.29".42" Hardware Code Eyebolt (Accepts #8 2/0) Knurled Stud Parallel-Groove (Accepts #6 2/0) HARDWARE CODE (X) 1ST END HARDWARE 2ND END HARDWARE 1 Spade Knurled Stud 5 Parallel-Groove Knurled Stud 6 Parallel-Groove Spade 8 Eyebolt Knurled Stud 9 Universal Adapter Spade C Universal Adapter Knurled Stud F Eyebolt Eyebolt G Parallel-Groove Eyebolt H Eyebolt Spade J Eyebolt Universal Adapter W Parallel-Groove Parallel-Groove Z Parallel-Groove Universal Adapter.29" Spade 3.3" Universal Adapter Rotatable through 180 H-92

33 Hi-Tech EXT Series Back-Up Current-Limiting Fuses Trans-Guard EXT Current-Limiting Backup Fuse for 65K 80K Ratings Ordering Information BASE CAT. NO. NOMINAL VOLTAGE RATING (kv) CURRENT RATING DIMENSIONS (IN.) A B WEIGHT (LBS.) HTDE33 (X) 065* 65K 8.3 HTDE33 (X) 080* 80K HTDE34 (X) 065* 65K 15.5 HTDE34 (X) 080* 80K HTDE35 (X) 065* 65K 23.0 HTDE35 (X) 080* 80K * When ordering, replace the (X) in the Base Catalog Number with the appropriate Hardware Code from the chart below. Hardware Code HARDWARE CODE (X) 1ST END HARDWARE 2ND END HARDWARE A Threaded Stud Threaded Stud E Eyebolt Knurled Stud F Eyebolt Eyebolt U Eyebolt Universal Adapter B Eyebolt (Accepts #8 2/0) 1.8" 2.2" A.46".29" 2.4" Knurled Stud 3.3" Threaded Stud ( 1 2" 13 threads) Universal Adapter Rotatable through 180 Trans-Guard EXT Current-Limiting Backup Fuse for 100K Ratings C.46" 1.8" A BASE CAT. NO. NOMINAL VOLTAGE RATING (kv) CURRENT RATING DIMENSIONS (IN.) A B C WEIGHT (LBS) HTDE23E K HTDE24E K B Eyebolt (Accepts #8 2/0) H-93

34 Hi-Tech EXT Series Back-Up Current-Limiting Fuses Voltage Selection Refer to first table below. Each Trans-Guard EXT Current-Limiting Backup Fuse is suitable for use in both single-phase and three-phase applications where the system voltage does not exceed the Maximum System Voltage listed. For single-phase applications on delta systems, one fuse is needed in each line. Current-Rating Selection Refer to second table below. Each Trans-Guard EXT Current-Limiting Backup Fuse will coordinate with any link having a rating no greater than that listed. For types of links not listed in this table, please contact Thomas & Betts for assistance. Hardware Selection Many different hardware options are available. Some options vary depending on the size of the Trans-Guard EXT Current-Limiting Backup Fuse required. Electrical Characteristics of Trans-Guard EXT Current-Limiting Backup Fuse NOMINAL VOLTAGE RATING (kv) CURRENT RATING RATED MAXIMUM INTERRUPTING CURRENT (ka) RATED MAXIMUM VOLTAGE (kv) MAXIMUM SYSTEM VOLTAGE (kv) PEAK ARC VOLTAGE (kv) MINIMUM MELT I2T (A2SEC) MAXIMUM TOTAL I2T (A2SEC) 12K 26 2,700 8,000 25K 26 11,000 29,000 40K 25 26,000 72, K 22 67, ,000 80K , , K , ,000 12K 47 2,700 9,000 25K ,000 34,000 40K 47 26,000 85,000 65K 44 67, ,000 80K , , K , ,000 12K 62 2,700 10,000 25K ,000 37,000 40K ,000 88,000 65K 65 67, , K , ,000 Trans-Guard EXT Current-Limiting Backup Fuse/Expulsion Fuse Link Coordination TRANS-GUARD EXT COORDINATES WITH LINKS UP THROUGH FUSE RATING TYPE K TYPE T TYPE N TYPE S TYPE H TYPE D TYPE X TYPE QA TYPE KS 12K K K K K K H-94

35 Hi-Tech FX Series Full-Range Current-Limiting Fuses Trans-Guard FX Full-Range Current-Limiting Fuse Patented damage sensor significantly reduces the risk of fuse failure should the fuse be subjected to an element-damaging current surge Hermetically sealed construction ensures that no gases escape from the fuse during current interruption All Trans-Guard FX fuses are helium mass spectrometer leak tested to ensure sealing system integrity Rugged machined brass end caps used for greater ferrule strength, resulting in less distortion and more secure fuse attachment in dry-well canisters Tested in accordance with the most recent ANSI/ IEEE standards including short circuit testing at the manufacturer s specified rated maximum application temperature (RMAT) Optional blown fuse indicator features a unique design that does not affect the fuse s arcing performance This fuse provides both overload and fault current protection for distribution equipment in a single fuse body. As a full-range fuse, it is capable of interrupting any continuous current between the minimum current that can cause melting of its elements and its rated maximum interrupting current (50,000 amps).the fuses are capable of interrupting in elevated ambient temperatures up to their rated maximum application temperature (RMAT). Figure 1 The Trans-Guard FX fuse is hermetically sealed and thus discharges no gases during fuse operation. An additional design distinction is its patented damage sensor that significantly reduces the potential for fuse failure in the event of element-damaging current surges. Applications: Trans-Guard FX fuses are available in a broad range of ratings. For ease of application, all designs are compatible with the industry-recognized standard mounting codes. Common applications include the Trans-Guard FX: Installed in drywell canisters for distribution transformer protection (see Figure 1) Clip mounted in live-front switchgear (see Figure 2) Externally mounted on overhead distribution systems, Type 4 (several outdoor versions available contact factory for more information) Installed in Elastimold MCAN rubber molded canister for deadfront/submersible applications (see page H-79) Installed directly in oil, Type 8 (contact factory for more information) Figure 2 H-95

36 Hi-Tech FX Series Full-Range Current-Limiting Fuses Construction A Tin-Plated Brass Caps Dimensional Information for Trans-Guard FX Fuses NOMINAL FUSE VOLTAGE RATING (kv) Resin-Rich Filament Wound Glass/Epoxy Body CURRENT RATING (AMPS) Low Current Interruption Element (Includes Patented Damage Sensor Compacted Quartz Sand DIMENSIONS INCHES (MM) A B C " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) Length B Mica Element Support Welded Element Joints " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) High Current Interruption Element " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) " ( mm) Epoxy Joint Solid Electrical Connection and Sealing C (Both Ends) STANDARD MOUNTING CODE (15.9) Blown Fuse Indicator Type 1 Before Operation After Operation H-96

37 Hi-Tech FX Series Full-Range Current-Limiting Fuses Electrical Characteristics Of Trans-Guard FX Fuses (Single Fuses) NOMINAL FUSE VOLTAGE RATING (kv) FUSE DIAMETER (IN.) CURRENT RATING (AMPS) FUSE CAT. NO. RATED MAXIMUM VOLTAGE (kv) MAXIMUM CONTINUOUS CURRENT (IN AIR) (6) (7) 25 C 40 C 55 C PEAK ARC VOLTAGE (5) (kv) MINIMUM MELT I 2 T (AMP 2 -SEC) MAXIMUM MELT I 2 T (3) (4) (AMP 2 -SEC) 3 HTFX HTFX ,764 8 HTFX , HTFX , HTFX , HTFX ,310 5, HTFX ,620 6, HTFX ,660 13, HTFX ,250 18, HTFX ,700 31, HTFX ,800 44, HTFX ,500 95, HTFX , , HTFX , , HTFX , , HTFX , , HTFX , , HTFX ,000 1,270,000 3 HTFX HTFX ,700 8 HTFX , HTFX , HTFX , HTFX ,310 9, HTFX ,620 11, HTFX ,660 22, HTFX ,250 30, HTFX ,700 50, HTFX ,800 70, HTFX , , HTFX , , HTFX , , HTFX , , HTFX , , HTFX , ,000 3 HTFX (1) HTFX ,600 8 HTFX , HTFX , HTFX , HTFX ,310 8, HTFX ,620 10, HTFX ,660 22, HTFX ,250 30, HTFX ,700 50, HTFX ,800 70, HTFX , , HTFX , , HTFX , , HTFX , ,000 RMAT (8) ( C) H-97

38 Hi-Tech FX Series Full-Range Current-Limiting Fuses Electrical Characteristics of Trans-Guard FX Fuses (Single Fuses) (continued) NOMINAL FUSE VOLTAGE RATING (kv) FUSE DIAMETER (IN.) CURRENT RATING (AMPS) FUSE CAT. NO. RATED MAXIMUM VOLTAGE (kv) MAXIMUM CONTINUOUS CURRENT (IN AIR) (6) 25 C 40 C 55 C PEAK ARC VOLTAGE (5) (kv) MINIMUM MELT I 2 T (AMP 2 -SEC) MAXIMUM MELT I 2 T (3) (4) (AMP 2 -SEC) 6 HTFX ,100 8 HTFX , HTFX , HTFX , HTFX ,310 11, HTFX ,620 13, HTFX ,660 28, HTFX ,250 38, HTFX ,700 61, HTFX ,800 82,000 Electrical Characteristics of Trans-Guard FX Fuses (Parallel Fuses) NOMINAL FUSE VOLTAGE RATING (kv) FUSE DIAMETER (IN.) CURRENT RATING (AMPS) FUSE CAT. NO. RATED MAXIMUM VOLTAGE (kv) MAXIMUM CONTINUOUS CURRENT (IN AIR) (6) 25 C 40 C 55 C PEAK ARC VOLTAGE (5) (kv) MINIMUM MELT I 2 T (AMP 2 -SEC) MAXIMUM MELT I 2 T (3) (4) (AMP 2 -SEC) 60 HTFX , , HTFX , , HTFX , , HTFX , , HTFX , , HTFX , , HTFX , , HTFX ,000 1,300, HTFX ,500 1,800, HTFX , , HTFX , , HTFX , , HTFX , , HTFX , , HTFX ,000 1,520,000 Notes for charts on pages H-97 H-98: 1. Designs have a 50,000 Amps RMS. Symmetrical Rating (except 3A 17.2kV, which was tested at 44kA maximum). 2. Current ratings shown in chart above are achieved by using a parallel combination of two fuses (order two fuses). To facilitate equal sharing of the interrupting duty, the two fuses should be resistance matched (± 2%) and be mounted such that the current paths to and from each fuse are symmetrical. 3. Tabulated Maximum Total I 2 t values are for currents of 50,000 amperes at the nominal voltage of the fuse (except for fuses having a rated maximum voltage of 8.8kV, in which case the maximum total I 2 t values are at 8.8kV). Fuses that have a rated maximum voltage higher than their nominal voltage rating will have a higher I 2 t let-through when applied at voltages up to these higher values. For example, maximum total I 2 t values are increased by approximately 30% when 8.3kV fuses are applied at 10kV and approximately 25% when 15.5kV fuses are used at 17.2kV. 4. Maximum total I 2 t values are reduced for currents below 50,000A. For example, at 10,000A, maximum total I 2 t values are approximately 15% less than the published values. 5. Peak arc voltages quoted are for 50,000A currents at the rated maximum voltage listed. Reduced currents and voltages will reduce the peak arc voltage. Consult the factory for further information. 6. Maximum continuous currents at higher ambient temperatures, and in confining enclosures: These may be determined by derating the fuses by.2% per degree C over 25 C (for example, at 85 C the derating would be 60 x.2 = 12%, making the maximum continuous current of a 30A fuse 41 x.88 = 36.1A). When fuses are applied in a confining enclosure, such as a drywell canister, additional derating of a fuse s maximum continuous current is necessary. Specifically, the maximum continuous current for fuses used in a dry-well canister, with the canister completely submerged in oil, will be reduced by an additional 2% (3% for fuses having a rated maximum voltage of 8.8kV). When calculating the derating for temperature, as described above, the temperature of the oil surrounding the canister should be used. For other types of enclosures, please consult the factory. 7. Reduction in the long time melting current of the fuses (approximately one hour and longer) due to higher ambient temperatures and use in enclosures is the same as described above for Maximum Continuous Current. See time-current characteristics for melting characteristics in this time region. 8. The 2.2"-dia. 80A and 160A (paralleled 80A) fuses have an RMAT of 140 C at a reduced rated maximum voltage of 5.5kV. RMAT (8) ( C) 140 RMAT (8) ( C) H-98

39 Hi-Tech FX Series Full-Range Current-Limiting Fuses Recommended Trans-Guard FX Mounted in a Standard Drywell Canister in Oil (at a max. oil temp. of 100 C) FUSE VOLTAGE RECOMMENDED FUSE CURRENT RATINGS (AMPERES) 5.5kV 8.3kV 15.5kV 23kV TRANSFORMER 1-PHASE VOLTAGE RATING (kv) PHASE-TO-GROUND 1-PHASE TRANSFORMER kva A B A B A B A B A B A B A B A B A B 10 6 b 8 6 a 3 3 a 3 a 3 a 3 a 3 a 6 a a 3 a 3 a 6 a b a b a 6 a 6 a a * b b * 65 80* * 80* 50 60* 50 60* * 60* 100* 60* 100* 40 60* * 80* 50 80* 40 60* * 80* 60* 100* * Recommended 8.3kV Trans-Guard FX Mounted in 15.5kV Drywell Canister in Oil (at a max. oil temp. of 100 C) FUSE VOLTAGE RECOMMENDED FUSE CURRENT RATINGS (AMPERES) 8.3kV TRANSFORMER 1-PHASE VOLTAGE RATING (kv) PHASE-TO-GROUND 1-PHASE TRANSFORMER kva A B A B A B A B A B X 160* * * * * 160* X 160* 65 X 65 X * 160* 130* 130* X=Use an 8.3kV Drywell Canister. See top chart for fuse recommendations. Notes: Column A = % of transformer rating and Column B = % of transformer rating. Fuses recommended in bottom chart must be mounted in a 15.5kV mounting code 5 drywell canister. Recommended fuses meet inrush criteria of 12 times transformer full load current for.1 second and 25 times transformer full load current for.01 second. Fuses also meet cold load pickup criteria of six times transformer full load current for 1 second and three times transformer full load current for 10 seconds. * Indicates parallel fuse applications. a Fuse allows greater than 300% of transformer rating. b Fuse allows greater than 200% of transformer rating. H-99

40 Hi-Tech FX Series Full-Range Current-Limiting Fuses Recommended Trans-Guard FX Mounted in a Standard Drywell Canister in Oil (at a max. oil temp. of 100 C) FUSE VOLTAGE RECOMMENDED FUSE CURRENT RATINGS (AMPERES) 5.5kV 8.3kV 15.5kV 23kV TRANSFORMER 3-PHASE VOLTAGE RATING (kv) PHASE-TO-PHASE 3-PHASE TRANSFORMER C 34.5 C kva A B A B A B A B A B A B A B A B A B A B a 3 a 3 a 3 a 6 a 6 a 6 a a a 3 a 6 a 6 a 6 a a 3 3 a 3 a 6 a 6 a 6 a b a 6 a 6 a b a 6 a 6 a b a 6 a 6 a b 18 8 b a 6 a * b a * b * * 50 80* b * 80* 60* 80* 50 80* * 80* 50 80* 50 60* * 100* 60* 80* * Recommended 8.3kV Trans-Guard FX Mounted in 15.5kV Drywell Canister in Oil (at a max. oil temp. of 100 C) FUSE VOLTAGE 3-PHASE TRANSFORMER kva RECOMMENDED FUSE CURRENT RATINGS (AMPERES) 8.3kV TRANSFORMER 3-PHASE VOLTAGE RATING (kv) PHASE-TO-PHASE A B A B A B A B A B X * b * 160* * X 160* * c 80 c * 130* 80 c 130* 80 c 130* * 130* 160 c * 130 b * 160 c * c * 130* X=Use an 8.3kV Drywell Canister. See top chart for fuse recommendations. Notes: Column A = % of transformer rating and Column B = % of transformer rating. Fuses recommended in bottom chart must be mounted in a 15.5kV mounting code 5 drywell canister. Recommended fuses meet inrush criteria of 12 times transformer full load current for.1 second and 25 times transformer full load current for.01 second. Fuses also meet cold load pickup criteria of 6 times transformer full load current for 1 second and 3 times transformer full load current for 10 seconds. * Indicates parallel fuse applications. a Fuse allows greater than 300% of transformer rating. b Fuse allows greater than 200% of transformer rating. c Recommendations limited to gndy-gndy transformers with no more than 50% delta connected secondary load. Phase-to-ground rated fuses are frequently recommended for gndy-gndy three phase transformers. In some cases, the fuses recommended in bottom chart may be suitable for use with transformers that are not gndy-gndy (contact the factory further information). H-100

41 Hi-Tech FX Series Full-Range Current-Limiting Fuses Recommended Trans-Guard FX Mounted in Air at 40 C Ambient Temperature FUSE VOLTAGE RECOMMENDED FUSE CURRENT RATINGS (AMPERES) 5.5kV 8.3kV 15.5kV 23kV TRANSFORMER 3-PHASE VOLTAGE RATING (kv) PHASE-TO-PHASE 3-PHASE TRANSFORMER C 34.5 C kva A B A B A B A B A B A B A B A B A B A B a 3 a 3 a 3 a 6 a 6 a 6 a a 6 a 3 a 3 a 3 a 3 a 6 a 6 a 6 a b a 3 3 a 3 a 6 a 6 a 6 a a 6 a a 6 a 6 a b a 6 a 6 a 6 a b a 6 a 6 a b a 6 a 6 a b 12 8 b a b b a b (65) 40 (65) b (65) 100 (65) (80) 40 (65) 40 (65) (130)* (80) (130)* (65) 100 (65) (160)* 200* (130)* 200 c * * * * 200 c * 250 c * 130* 200* * * 200* 130* 200* * 200* Notes: Column A = % of transformer rating and Column B = % of transformer rating. Recommended fuses meet inrush criteria of 12 times transformer full load current for.1 second and 25 times transformer full load current for.01 second. Fuses also meet cold load pickup criteria of 6 times transformer full load current for 1 second and 3 times transformer full load current for 10 seconds. * Indicates parallel fuse applications. Ratings in parenthesis are 2.2"-dia. fuses (catalog numbers HTFX230065, HTFX and HTFX240065). a Fuse allows greater than 300% of transformer rating. b Fuse allows greater than 200% of transformer rating. c Recommendations limited to gndy-gndy transformers with no more than 50% delta connected secondary load. Phase-to-ground rated fuses are frequently recommended for gndy-gndy three phase transformers. H-101

42 Hi-Tech FX Series Full-Range Current-Limiting Fuses Fuse Ordering Information To order the proper fuse for a particular application, first determine the correct fuse voltage and current rating using either the appropriate application table (pages H-99 H-101) or the published performance data (pages H-97 H-98, the applicable TCCs and Peak Let-Through Characteristics). Then refer to the chart below to determine the appropriate catalog number. Fuse Catalog Numbers CURRENT RATING (AMPS) 3 FUSE DIAMETER (IN.) CAT. NO. 5.5kV 8.3kV 15.5kV 23.0kV HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX * HTFX HTFX HTFX HTFX HTFX HTFX HTFX * HTFX * HTFX HTFX * HTFX HTFX * HTFX * HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX HTFX * HTFX HTFX HTFX * HTFX HTFX HTFX * HTFX HTFX * HTFX Notes: To order a fuse having a blown fuse indicator, replace the 7th character ( 0 ) in the catalog number with a 1 (Example: HTFX241040). Please note that indicator fuses are not suitable for use in drywell canister applications. Also, an indicator option is not available on 3A fuses. * Current ratings shown are achieved by using a parallel combination of two fuses (order two fuses). Contact factory for ordering information concerning outdoor and under-oil fuse versions. H-102

43 Hi-Tech SX Series Full-Range Current-Limiting Fuses Provides both overload and fault current protection for distribution equipment in a single fuse body. Trans-Guard SX Full-Range Current-Limiting Fuse As a full-range fuse, this fuse is capable of interrupting any continuous current between the minimum current that can cause melting of its elements and its rated maximum interrupting current (50,000 amps). The fuses are capable of interrupting in elevated ambient temperatures up to their rated maximum application temperature, which is 140 C and 71 C for the 2.2-inch and 3.3-inch diameter designs, respectively. The Trans-Guard SX fuse is hermetically sealed and thus discharges no gases during fuse operation. An additional design distinction is its patented damage sensor that significantly reduces the potential for fuse failure in the event of element-damaging current surges. Patented damage sensor significantly reduces the risk of fuse failure should the fuse be subjected to an element damaging current surge Hermetically sealed construction ensures that no gases escape from the fuse during current interruption. All Trans-Guard SX fuses are helium mass spectrometer leak tested to ensure sealing system integrity Rugged machined brass end caps provide greater ferrule strength, resulting in less distortion and more secure fuse attachment in wet-well fuse holders Tested in accordance with the most recent ANSI/IEEE standards Application: Trans-Guard SX fuses are specifically designed to be installed in wet-well fuse holders for oil-filled padmounted switchgear and transformer applications (only 2.2-inch diameter designs are suitable for wet-well fuses holders mounted directly in transformers).! CAUTION: Trans-Guard SX fuses are NOT designed for any type of live switching operation. H-103

44 Hi-Tech SX Series Full-Range Current-Limiting Fuses Construction A 3/8-16 UNC 2B Thd..75 Deep Dimensional Information WET WELL HOLDER (kv) (25.4) Brass Caps NOMINAL FUSE VOLTAGE RATING (kv) CURRENT RATING (AMPS) * Low Current Interruption Element (Includes Patented Damage Sensor Resin-Rich Filament Wound Glass/Epoxy Body Length B C Compacted Quartz Sand Mica Element Support High Current Interruption Element Welded Element Joints DIMENSIONS INCHES (MM) A B C 3.29" (83.6mm) 2.22" (56.3mm) 3.29" (83.6mm) 2.22" (56.3mm) 3.29" (83.6mm) 2.22" (56.3mm) 3.29" (83.6mm) 2.22" (56.3mm) 19.06" (484.1mm) 19.06" (484.1mm) 19.06" (484.1mm) 19.06" (484.1mm) 19.06" (484.1mm) 21.12" (536.4mm) 21.12" (536.4mm) 21.12" (536.4mm) * To order a 15.5kV fuse that will fit in an 8.3kV wet-well fuseholder, replace the 7th character ( 0 ) in the catalog number with a 2 (example: HTSX242050). See page H-105. Epoxy Joint Soldered Electrical Connection and Sealing Brass Extender 14.66" (372.4mm) 7.93" (201.4mm) 11.85" (300.1mm) 12.24" (310.9mm) 14.66" (372.4mm) 12.24" (310.9mm) 14.66" (372.4mm) 15.05" (382.3mm) 1.00 (25.4) H-104

45 Hi-Tech SX Series Full-Range Current-Limiting Fuses Electrical Characteristics of Trans-Guard SX Fuses NOMINAL FUSE VOLTAGE RATING (kv) CURRENT RATING (AMPS) (2) FUSE CAT. NO. RATED MAXIMUM VOLTAGE (kv) MAXIMUM CONTINUOUS CURRENT (IN 60 C) (5) PEAK ARC VOLTAGE (6) (kv) MINIMUM MELT I 2 T (AMP 2 -SEC) MAXIMUM MELT I 2 T (3) (4) (AMP 2 -SEC) 100 HTSX , , HTSX , , HTSX , , HTSX , , HTSX ,000 1,270,000 5 HTSX HTSX , HTSX , HTSX , HTSX , HTSX ,310 9, HTSX ,620 11, HTSX ,660 22, HTSX ,250 30, HTSX ,700 50, HTSX ,800 70, HTSX , , HTSX , , HTSX , , HTSX , ,000 5 HTSX HTSX , HTSX , HTSX , HTSX , HTSX ,310 8, HTSX ,620 10, HTSX ,660 22, HTSX ,250 30, HTSX ,700 50, HTSX ,800 70, HTSX , , HTSX , , HTSX , , HTSX , HTSX , HTSX , HTSX , HTSX ,310 11, HTSX ,620 13, HTSX ,660 28, HTSX ,250 38, HTSX ,700 61,000 Notes: 1. Designs have a 50,000 amps RMS. Symmetrical Rating (except 5A 17.2kV which was tested at 44kA maximum). 2. Fuses rated 75A and below are 2.25" in diameter. Higher ratings are 3.3" in diameter. 3. Tabulated Maximum Total I 2 t values are for currents of 50,000 amperes at the nominal voltage of the fuse. Fuses which have a Rated Maximum Voltage higher than their Nominal Voltage Rating will have a higher I 2 t let-through when applied at voltages up to these higher values. For example, Maximum Total I 2 t values are increased by approximately 30% when 8.3kV fuses are applied at 10kV and approximately 25% when 15.5kV fuses are used at 17.2kV. 4. Maximum total I 2 t values are reduced for currents below 50,000A. For example, at 10,000A, I 2 t values are approximately 15% less than the published values. 5. Maximum continuous currents at different ambient temperatures: These may be determined by derating the fuses by.2% per degree C over 60 C (for example at 80 C the derating would be 20 x.2 = 4%, making the maximum continuous current of a 20 A fuse 22.5 x.96 = 21.6A) or rerating the fuses by.2% per degree C under 60 C (for example, at 40 C the rerating would be 20 x.2 = 4%, making the maximum continuous current of a 20 A fuse 22.5 /.96 = 23.4A). The long time melting current of the fuses (approximately one hour and longer) due to different ambient temperatures is the same as described above for Maximum Continuous Currents. See time current characteristics for melting characteristics in this time region. 6. Peak arc voltages quoted are for 50,000A currents at the rated maximum voltage listed. Reduced currents and voltages will reduce the peak arc voltage. Consult the factory for further information. H-105

46 Hi-Tech SX Series Full-Range Current-Limiting Fuses Recommended Trans-Guard SX for Switchgear (mounted in a wet-well fuseholder with a max. oil temp. of 60 C) FUSE VOLTAGE RECOMMENDED FUSE CURRENT RATINGS (AMPERES) (5.5KV) 8.3kV 15.5kV 23kV TRANSFORMER 1-PHASE VOLTAGE RATING (kv) PHASE-TO-GROUND 1-PHASE TRANSFORMER kva A B A B A B A B A B A B A B A B A B a 5 5 a 5 a 5 a 5 a 5 a 10 a a 10 a a 5 a 5 a 10 a b a 10 a 5 5 a 5 a 10 a b a a 10 a 10 a 10 a 10 a b b b a 10 a 10 a b b a 10 a (100) b (150) b (175) 65 (100) b b b (150) (225) (100) (150) 75 (100) b b b (225) (150) (175) (150) b (175) b (250) c (175) (250) (150) (225) (250) c (250) (250) c 160 c c 150 Note: Column A = % of transformer rating and Column B = % of transformer rating. See additional notes on page H-107. Recommended Trans-Guard SX for Switchgear: Protecting Delta Connected Transformers (mounted in a wet-well fuseholder with a max. oil temp. of 60 C) RECOMMENDED FUSE CURRENT RATINGS (AMPERES) FUSE VOLTAGE 3-PHASE TRANSFORMER kva (5.5KV) 8.3kV 15.5kV 23kV TRANSFORMER 3-PHASE VOLTAGE RATING (kv) PHASE-TO-PHASE A B A B A B A B A B A B A B A B a a 5 a 5 a 5 a 10 a a 10 a 5 5 a 5 a 5 a 10 a a 10 a 5 5 a 5 a 10 a b a a b a 10 a 10 a b a 10 a 10 a b a a 10 a b b b (100) (100) b b (150) b (175) 65 (100) b (175) (250) (150) b (175) (100) (150) b (250) (150) (225) (150) (225) d b (225) (175) (250) d 150 d (250) c (250) d c c Note: Column A = % of transformer rating and Column B = % of transformer rating. See additional notes on page H-107. H-106

47 Hi-Tech SX Series Full-Range Current-Limiting Fuses Recommended Trans-Guard SX for Switchgear: Protecting GndY-GndY* Connected Transformers with Less than 50% Delta Connected Secondary Load (mounted in a wet-well fuseholder with a max. oil temp. of 60 C) FUSE VOLTAGE RECOMMENDED FUSE CURRENT RATINGS (AMPERES) (5.5KV) 8.3kV 15.5kV 23kV TRANSFORMER 3-PHASE VOLTAGE RATING (kv) PHASE-TO-PHASE 3-PHASE TRANSFORMER kva A B A B A B A B A B A B A B A B A B A B a 5 5 5a 5 a 5 a 5 a 5 a 5 a 10 a a 10 a 5 5 a 5 a 5 a 5 a 5 a 10 a a 10 a 5 5 a 5 a 5 a 5 a 10 a b a a 5 a 10 a b a 10 a a b a 10 a 10 a 10 a 10 a b a a 10 a 10 a 10 a b b b a 10 a (100) a (100) b b a 300 (150) b (175) 65 (100) b a (175) (250) (150) b (175) (100) (150) 65 (100) b b (250) (150) (225) (150) (225) (100) (150) 75 (100) b b b (225) (175) (250) (150) (175) (150) b (175) d (250)c (250) (175) (250) (150) (225) d 150 d (225) (225) d (250) c (250) d c * Phase-to-Ground rated fuses are commonly used for GndY/GndY connected transformers having no more than 50% Delta connected secondary load. Notes: 1. Column A = % of transformer rating and Column B = % of transformer rating. 2. Recommended fuses meet inrush criteria of 12 times transformer full load current for.1 second and 25 times transformer full load current for.01 second. Fuses also meet cold load pickup criteria of 6 times transformer full load current for 1 second and 3 times transformer full load current for 10 seconds. 3. Ratings in parentheses are 5.5kV rated fuses. a Fuse allows more than 300% of transformer rating. b Fuse allows more than 200% of transformer rating. c Fuse allows at least 125% of transformer rating. d 15.5kV fuse must be used for voltages over 8.32kV for delta configurations or 13.8kV GndY/8.32kV. H-107

48 Hi-Tech SX Series Full-Range Current-Limiting Fuses Trans-Guard Ordering Information for Trans-Guard SX Fuses SX Fuse Ordering Information To order the proper fuse for a particular application, first determine the correct fuse voltage and current rating using the published performance data (page H-105). Then refer to the chart below to determine the appropriate catalog number. Alternatively, fuse selection can be determined using the accompanying charts on pages H-106 H-107. CONTINUOUS CURRENT RATING CAT. NO. (AMPS) 5.5kV 8.3kV 15.5kV 23.0kV 5 HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX HTSX Note: To order a 15.5kV fuse that will fit in an 8.3kV wet-well fuseholder, replace the 7th character ( 0 ) in the catalog number with a 2 (example: HTSX242050). Important Notice When Using Trans-Guard SX Fuses When replacing the obsolete AB Chance SL fuse with a Hi-Tech Fuses Trans-Guard SX fuse, it is important to recognize that the SX fuse designs should not be used on distribution systems where the primary line-to-line voltage exceeds the rated maximum voltage of the fuse as shown in the chart to the right: This should be considered when choosing a proper replacement for the AB Chance SL fuse as they were, in some cases, used on systems having line-to-line voltages greater than that of the current-limiting fuse component of the assembly. Again, when choosing the appropriate Hi-Tech SX fuse to replace the AB Chance SL fuse, care must be taken to ensure that the rated maximum voltage of the SX fuse exceeds the system line-to-line voltage. The only exception to this requirement is when all the transformers that are downstream from the switches where the SX fuses are to be installed are GndY-GndY connected with less than 50% delta connected secondary load. In that case, a fuse having a rated maximum voltage exceeding the system line-to-neutral voltage may be used. Trans-Guard SX NOMINAL FUSE VOLTAGE RATING (kv) CURRENT RATING (AMPS) RATED MAXIMUM VOLTAGE (kv) kV kV kV kV kV kV H-108

49 Hi-Tech EX Series Full-Range Current-Limiting Fuses The Trans-Guard EX full-range current-limiting capacitor fuse provides both low and high current fault protection in a single, compact fuse body. Trans-Guard EX Full-Range Current-Limiting Capacitor Fuses 2 2 Outdoor Use Indoor Use H-109

50 Hi-Tech EX Series Full-Range Current-Limiting Fuses Blown Fuse Indicator As a full-range fuse, the Trans-Guard EX is capable of interrupting any current that causes melting up to its rated maximum interrupting current of 50kA. Its ability to significantly limit energy let-through during a fault greatly reduces the likelihood of disruptive equipment failures. The blown fuse indicator makes it easy to see when a fuse has operated, helping to locate failed capacitor banks. The Indoor versions of the Trans-Guard EX current-limiting capacitor fuses are used in metal-enclosed capacitor banks, harmonic filter banks and padmounted capacitor banks. Outdoor versions are coated with an oven-baked UV acrylic paint and are used in open rack-mounted systems. All Trans-Guard EX fuses provide protection against disruptive equipment failures, such as a case rupture, when a dielectric or non-dielectric fault occurs within the capacitor. Fuses are sized to withstand transient inrush currents associated with back-to-back capacitor bank switching. The Trans-Guard EX fuse is hermetically sealed so no external expulsion gases are produced during interruption and it has no moving parts. This makes it ideal for bus-mounting or bushingmounting, and both indoor and outdoor versions are available. An additional design distinction is its patented damage sensor which significantly reduces the potential for fuse failure in the event of element-damaging current surges. BLOWN Blown FUSE INDICATOR Fuse Indicator Before Operation 'D' D 'B' B 1.25" 125" 1.125" 0.5" x x 1.5" 1.5" Slot Slot BLOWN Blown FUSE INDICATOR Fuse Indicator After Operation 'D' D 'B' B Bushing BUSHING MOUNT Mount Bus Mount BUS MOUNT 'C' C 'A' A 'C' C 'A' A Dimensional Information RATED MAXIMUM VOLTAGE (kv) CURRENT RATING (AMPS) HTEX3***** =.68" HTEX2***** =.48" 1/2-13 UNC THREAD MIN THREAD DEPTH HTEX3***** =.64" HTEX2***** =.44" HTEX3*****=.68" HTEX2*****=.48" 1/2 13 UNC Thread Min. Thread Depth HTEX3*****=.64" HTEX2*****=.44" INCHES (MM) FUSE LENGTH A TAG LENGTH B FUSE DIAMETER C TAG OFFSET D (203) 2.9 (74) 2.2 (56) (29) (373) 2.5 (64) 3.3 (84) 1.75 (44) (203) 2.9 (74) 2.2 (56) (29) (302) 2.5 (64) 3.3 (84) 1.75 (44) (312) 2.9 (74) 2.2 (56) (29) (373) 2.5 (64) 3.3 (84) 1.75 (44) (384) 2.9 (74) 2.2 (56) (29) 'B' B H-110