L&T SWITCHGEAR S A F E & S U R E. Moulded Case Circuit Breakers

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Tyrone Ross
5 years ago
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1 L&T SWITCHGER S F E & S U R E Moulded Case Circuit Breakers

2 Introduction Larsen & Toubro infuses engineering with imagination. The Company offers a wide range of advanced solutions in the field of Engineering, Construction, Electrical & utomation, Machinery and Information Technology. L&T Switchgear, a part of the Electrical & utomation business, is India's largest manufacturer of low voltage switchgear, with the scale, sophistication and range to meet global benchmarks. With over five decades of experience in this field, the Company today enjoys a leadership position in the Indian market with a growing international presence. It offers a complete range of products including powergear, controlgear, industrial automation, building electricals & automation, reactive power management, energy meters, and protective relays. These products conform to Indian and International Standards. The range, a new generation of MCCBs, stands out due to its state-of-the-art design, contemporary user-friendly features, wide choice of protective releases, ergonomics, aesthetics and compactness. The range complies with the latest standards like IEC , E & IS The products conform to international standards, carry markings and are & CB certified. The range is specially designed for tropical conditions, ensuring reliable performance at high ambient and humid environments. The range is designed to meet the changing needs of users after extensive analysis and user feedback. The range can satisfy the most demanding system requirements. The range, complimented by a wide range of accessories, offer total solution to customer applications ensuring operational safety, reliability and versatility. Switchgear Factory, Mumbai

3 Contents Range Protection Releases 2 State-of-the-art technology 5 ccessories 7 Technical Data Time - Current Characteristic Curves 3 Overall Dimensions 6 D0 D D2 D3 D4

4 The Complete Range Features From to 0 3 Pole & 4 Pole Choice of 36k/50k/70k breaking capacities. With protection releases in Microprocessor, Thermal-Magnetic and only Magnetic MCCBs for motor backup protection MCCBs for distribution and SD versions Manual, rotary or motorised versions Wide range of internal and external accessories Rated Current Release Rated Current Release Rated Current Release Rated Current Release Rated Current Release D0,, 32, 40, 50, 63, 80, 0 Thermal-Magnetic D 0,, 60, 0, 0 Thermal-Magnetic D2 32, 40, 50, 63, 80, 0,, 60, 0, 0 40, 63, 0, 60, 0 Thermal-Magnetic Microprocessor D3 3, 400, 500, , 0, 400, 630 Thermal-Magnetic Microprocessor D4 800, 00, 0 Microprocessor Breaking Capacities Breaking capacity 36k 50k 70k Old Type Designation S (35k) H L ew Type Designation D S ote : Since there is no change in the constructional aspect of the MCCBs, the product Certification with old designation remain valid with new type designation.

5 Protection Releases Thermal-Magnetic Release Protection Settings Features of Thermal-Magnetic Release djustable overload settings djustable short circuit settings True RMS sensing o contact with live parts Overload Short circuit Earth fault D0 & D 80% - 0% In 9 In (fixed) External D2 & D3 80% - 0% In 6 - In External Microprocessor Release Features of RC Microprocessor Release 7 Overload protection with inverse time delay Short circuit protection with selectable time delay Instantaneous over ride protection Earth fault protection with selectable time delay eutral protection with selectable time delay Push to trip button Port for release testing and thermal memory bypass Power O LED Self powered protections True RMS sensing Rated Current In () Current setting, Ir (Ir = XIn) Time delay, tr (Inverse) Protection mode Current setting, Ir (Ir = XIn) Protection mode Current setting, Is (Is =XIr) Time delay, ts Protection mode Current setting, Ip Current setting, Ig Time delay, tg Protection mode RC From 40 to 0 Overload (Phase) OFF, 0.4 to.0 in steps of 0. sec at 6Ir O / OFF Overload (eutral) 0.5,0.75 &.00 Ir Inverse sec at 6 Ir / Fixed 0ms O / OFF Short Circuit.5, 4 & 6Ir, 8Ir Inst. / 0 msec O / OFF Instantaneous Over ride D2-8In, D In, D In, D4-8In Earth Fault 0.2 to 0.5In steps of 0. 0 / 0 msec O / OFF 2

6 Protection Releases Microprocessor Release Features of RC - Communication Capable Communication using RS 485 Power on LED Backlit LCD display Scroll buttons Push to trip button ll features of RC release are incorporated Metering for current parameters Protection against unbalanced load / single phasing 2 I t protection eutral protection Cold load protection User friendly navigation system Self powered MODBUS RTU protocol Rated Current In () Current setting (), Ir (Ir = xin) Time delay, tr (s) (Inverse) Protection mode Preset trip alarm setting Thermal memory Current setting (), Ir Protection mode Current setting (), Is Time delay (ms), ts Protection mode Preset trip alarm setting Cold load pickup Instantaneous Protection mode Cold load pickup Current setting (), Ip Current setting (), Ig Time delay (ms), tg Preset trip alarm setting Protection mode Cold load pickup RC Overload (Phase) Overload (eutral) Short Circuit Instantaneous Instantaneous Over ride Earth Fault From 60 to to.0 in steps of 0. 3, 6,, 5, 30 at 6Ir O / OFF 0.8 to.0ir in steps of 0.05 O / OFF 50%, 0%, 50% Ir O / OFF.5, 4, 6, 8Ir For I²t OFF to 0 in steps of For I²t O 60 to 0 in steps of O / OFF 0.8 to.0 times Is in steps of 0.05 Is Enable / Disable.5 to 8In in steps of 0.5In / Ir O / OFF Enable / Disable D2-8In, D In, D In, D4-8In 0.2 to 0.5In steps of 0.In 0., 0.2, 0.5,, 3 sec. 0.8 to.0 Ig in steps of 0.05 O / OFF Enable / Disable 3

7 Protection Releases dditional Features of RC Current setting () xin Time delay (s) Protection mode Cold load pickup larm / Trip Current Display Protocol Link used Event records Trip history Trip counter record Current Unbalance % to 0% In in steps of 5% to in steps of 0.5 O / OFF Enable / Disable Temperature Rise t 80ºC / t 0ºC Metering Phase, eutral and Earth Backlit LCD Communication* MODBUS RTU RS 485 Pickup, Trip, larm upto 28 records-volatile memory Last 5 trips records - non volatile memory Counts for total number of trips Only Magnetic release (for Motor backup protection) Only magnetic with instantaneous protection upto In Fault level protection for complete starter upto 50k Type 2 charts available for DOL & Star/delta starters Frame Type Current Range () Poles 45V C, 50Hz 0 D2-0M D3-400M P only D3-630M Switch Disconnector version (without protection release) Frame Type Current Range () 0 D2-0SD D3-400SD D3-630SD Can be used as switching or Isolator devices Higher withstand capacities Wide range of accessories for remote operation Poles Icw (k) for sec. 3/ /4 6 3/4 6 * To establish communication with computer every MCCB with RC will require a communication module. 4

8 imp State-of-the-art technology Faster tripping The unique speed contact system accelerates the opening of contacts during short circuit. This ensures faster tripping an ultimate current limiting feature. The result-very low let-through, cut-off current and fault clearing time Mechanical nti-reclosing This unique feature ensures that under short circuit conditions, the contacts open and latch even before the release gives a trip command to the mechanism. This avoids contact re-closing and bounce Low watt loss The entire current carrying path is optimally designed to achieve very low watt loss Positive Isolation The MCCB knob indicates the true position of the contacts U : 45V, 50/ 60Hz. CT: e : 8k I : 50 k, cu I cs:0%icu U V IS IEC E D3-630 Double Insulation The internal accessories are housed in insulated casings to ensure first level of insulation. When the front cover is opened for the fixing of internal accessories, the MCCB is totally insulated ensuring the double insulation Extra Grip on Handle Marking CE Marking ensures use of superior engineering plastic, meeting all requirements of flammability and glow wire testing path is optimally designed to achieve very low watt loss 5

9 e m I :70k, U :8kV i p CT: U :4 V 0/6 Hz. imp e 5, 5 0 I :70k, cs cu cu U :8kV CT: I S IEC E cs cu imp State-of-the-art technology Common Internal accessories The internal accessories remain same across D0 / D & D2 / D3 / D4* and they are easy to install snap fit type I :0%I D2-0S U : 45 V, 50/60Hz. U : 8k C T: e V I : 50k, I :0% cu I IS IEC E D3-630 LIE o load line bias Either side of MCCB terminal can be used as load or line U :45V, 50/60Hz. cu I :0%I cs cu D2-0S I S IEC E LOD Terminal finger proofing Front terminal plates conceal the terminals to prevent human contact thus achieving complete finger proofing Release shrouding Release is shrouded from the front thus preventing tampering by unauthorized person Safer release adjustments o live parts are in contact during release adjustments Common front adjustments for protection release Overload & short circuit setting can be adjusted from front using a common knob for all the poles Visibility Push to trip button and release ratings are visible even when release plate is fitted * Except under voltage release. 6

u cs cu imp I 7 imp 8 V CT: cu : 50k cs cu C T: I 7 0 I c u imp CT: ccessories Internal ccessories Range of MCCBs are offered with snap-fit type, easily installable internal accessories.

uxiliary Contact List of Internal ccessories uxiliary Contact C/O uxiliary Contact 2 C/O Trip larm Contact uxiliary & Trip larm Contact Shunt Release Under Voltage Release U :45V, 50/60Hz.

10 u cs cu imp I 7 imp 8 V CT: cu : 50k cs cu C T: I 7 0 I c u imp CT: ccessories Internal ccessories Range of MCCBs are offered with snap-fit type, easily installable internal accessories. There is no need to open main cover and no live parts are accessed during installation. TC, ux+tc to be fitted in the right cavity & under voltage release to be fitted in left cavity. uxiliary Contact List of Internal ccessories uxiliary Contact C/O uxiliary Contact 2 C/O Trip larm Contact uxiliary & Trip larm Contact Shunt Release Under Voltage Release U :45V, 50/60Hz. e U : k cs c D2-0S cu : 0k, I :0%I u IS IEC E U :45V, 50/60Hz. e U :8kV cu : 0k, I : % s c D2-0S IS IE C E MCCB with mid cover opened & Internal accessories fitted External ccessories Extended Rotary Handle (Panel Mounted) ROM mounts directly on MCCB without removal of mid cover Clear O/OFF/TRIP indication Clear view of MCCB rating label with ROM mounted Direct access to push to trip button with ROM mounted IP 54 degree of protection with extended rotary handle Unique coupling to allow +3mm tolerance Door interlock in O position, with defeat facility Door interlock in OFF condition with padlock feature uto restoration of door interlock External keylock for mechanical interlocking Ue : 45V, 50/ 60Hz. U imp: 8kV I, I :0%I IS IEC E D3-630 Extended Rotary Handle: Panel Mounted Panel Door Mounted Key lock (To be used along with extended rotary handles) U : 45 V, 50/60 Hz. C T: e U : 8kV I : 50k, % c I :0 I IS IEC E D3-630 Rotary Operating Mechanism The rotary operating mechanism (ROM) for Direct & Extended versions. MCCBs are available in Direct rotary handle (MCCB mounted) These versions are available for the entire family of MCCBs. 7

I cs cu imp 0 cs cu imp T ccessories Mechanical Interlocking Schemes. Mechanical Interlocking Kit: Two MCCBs can be interlocked using base plate mechanism, in side-by-side configuration.

11 I cs cu imp 0 cs cu imp T ccessories Mechanical Interlocking Schemes. Mechanical Interlocking Kit: Two MCCBs can be interlocked using base plate mechanism, in side-by-side configuration. Features For 3 Pole & 4 Pole versions For D2 & D3 frames Site fittable U : 45V, 50/60H z. CT: e U : 8kV : 50k, I :0% cu I IS I EC E D3-630 U : 45 V, 50/60H z. C : e 8 I : 50k, cu I : %I U : kv IS I EC E D3-630 MIL with Base Plate 2. Mechanical Interlocking using Key locks: For mechanical interlocking through Extended Rotary operating mechanism, a panel mounted key lock is available. The selection of the key lock as per the following details, 2 l/c 2 I/C and B/C 3 I/C and 2 B/C ny type of lock for both MCCBs Lock and Lock 2 for I/C and Lock 2 for B/C Locks, 2, 3 for I/Cs and Locks 2, 23 for B/Cs Key Lock Selection I/C I/C 2 I/C 3 Lock Lock 2 Lock 3 Incommers (I/C) Lock 2 Lock 23 Bus couplers (B/C) B/C B/C 2 Type of lock Exclusively operable by Key os. 2 3, 2 & 2 2, 3 & 23 8

ccessories External eutral CTs Features dd on accessory for 3P MCCB Reliable solution for Earth / eutral fault protection for 3 Phase 4 wire system Stored Energy Electrical Operating Mechanism

time< 90 msec Higher mechanical & electrical endurance Back up fuse for extended motor protection Easy access to the protection setting on MCCB True indication for O/OFF & Trip D3 SE EOM data sheet

12 ccessories External eutral CTs Features dd on accessory for 3P MCCB Reliable solution for Earth / eutral fault protection for 3 Phase 4 wire system Stored Energy Electrical Operating Mechanism Features O / OFF & Charged/Discharged indication Foolproof mounting Selector switch for uto/manual operation Padlock facility for locking in OFF position(3 nos locks) Resetting time < 0msec & Closing time< 90 msec Higher mechanical & electrical endurance Back up fuse for extended motor protection Easy access to the protection setting on MCCB True indication for O/OFF & Trip D3 SE EOM data sheet Operating voltage (V C) 240 Operating voltage (%) 85-% Closing time (ms) 90 Opening time (ms) 0 Power consumption (V) 500 Life / o. of operations 5000 Door cut out (mmxmm) IP protection, on the front Operating frequency 96X96 IP30 /min Min. control impulse time (ms) 0 9

ccessories utomatic Source Transfer Switch Controller uxc-00 UTO TRSFER COTROLLER 448 448 LIE LIE 2 L L2 L3 Hz L L2 L3 Hz uxc-00 LRM TEST TEST The uxc-00 controller brings simplicity and flexibility

It sets a new benchmark in uto source transfer switch controller technology. O O OFF OFF O O WITHDRW WITHDRW TRIP TRIP LOD 0 LOW BTTERY VOLTGE 04 LIE 2 SWITCH FULT 07 LOD OT POWERED T.

13 ccessories utomatic Source Transfer Switch Controller uxc-00 UTO TRSFER COTROLLER LIE LIE 2 L L2 L3 Hz L L2 L3 Hz uxc-00 LRM TEST TEST The uxc-00 controller brings simplicity and flexibility to an auto source transfer system. It has been developed to control and supervise the automatic or manual transfer of a utility load from a principal power supply source to a stand-by. It sets a new benchmark in uto source transfer switch controller technology. O O OFF OFF O O WITHDRW WITHDRW TRIP TRIP LOD 0 LOW BTTERY VOLTGE 04 LIE 2 SWITCH FULT 07 LOD OT POWERED T. OUT 02 HIGH BTTERY VOLTGE 05 LIE WROG PHSE SEQ. 08 GEERTOR OT REDY UTO MUL OFF/RESET It includes all the necessary features to supervise and control power supply sources, composed by energy distribution systems or generating sets, and the relative transfer equipment, such as contactors, motorized moulded case circuit breakers and air circuit breakers. 03 LIE SWITCH FULT 06 LIE 2 WROG PHSE SEQ. 09 EMERGECY STOP The automatic transfer takes place through uxc-00 whenever conditions predefined by the user take place, for example: Power supply source not respecting programmed limits The need to have a very reliable power source The need to use the most economical power source Some of the key features of this controller are: Front display for monitoring the system voltage and frequency and for onsite controller programming Six programmable inputs and five programmable outputs Front test feature to simulate the operation of the diesel generator set Status indication through 22 LEDs Flush mounting arrangement Communication capable The uxc-00 controller is compatible with U-Power range of ir circuit breakers, range of MCCBs and MCX range of contactors. + uxc-00 MIL with Base Plate & EOM

Technical Data TESTED C C E S S O R I E S Frame Type Current Range () Poles Impulse withstand Voltage (kv) Rated Operational Voltage (V) (MX) Rated Insulation Voltage (V) Utilisation Category

14 Technical Data TESTED C C E S S O R I E S Frame Type Current Range () Poles Impulse withstand Voltage (kv) Rated Operational Voltage (V) (MX) Rated Insulation Voltage (V) Utilisation Category Standard IEC Life span Operating Frequency (Hz) Total Opening Time Finger-proof Terminals mbient Temperature Storage Temperature Mounting Positions Dimensions (W x D x H) 3 mm Weight (kg) (3/4 Pole) Internal External Icu (k) Ics as % lcu 230 / 240 V 400 / 45 V 500 V 550 V 600 V 690 V 0 V DC (3P in series) 500 V DC (3P in series) L/ R<5msec Mechanical In 3-Pole 4-Pole uxiliary Contact Trip larm Contact uxiliary & Trip larm Contact Shunt Release $ Under Voltage Release Rotary Operating Mechanism Electrical Operating Mechanism Earth Fault Release Mechanical Interlock Spreader Links Key lock Pad lock through ROM $ : O of control contactor to be connected in series for 2V DC application. ote: ny two internal accessories can be mounted at a time For special application like capacitor switching, DC please contact nearest branch office For motor application, use M series MCCBs (D2M, D3M) vailable on request. * # Direct Pad locking available 0 D0-0 D,, 32, 40, 50, 63, 80 & 0 3 / IEC / E / IS % x 60 x 30 0 x 60 x 30 /. C/O or 2C/O C/O or 2C/O C/O + C/O 240 / 45 V C 50 / 60 Hz 240 V C 50 Hz x x vailable with external GF module with TM release x x # 0 D-0 0,, 60, 0, 0 3 / IEC / E / IS % x 60 x x 60 x /.8 C/O or 2 C/O C/O or 2 C/O C/O + C/O 240 / 45 V C 50 / 60 Hz 240 V C 50 Hz x x D 0 D2-0 32, 40, 50, 63, 0,, 60, 0 & % 3 / IEC / E / IS % x 96 x x 96 x / 3.3 C/O or 2C/O C/O C/O + C/O / 45 V C 50 / 60 Hz, / 2 V DC V C 50 Hz S % D % 50 / 60 < msec Yes to 55 C to 70 C 400 D , 60, 0, 3, / IEC / E / IS % Vertical and 90 in both directions 40 x.5 x x.5 x / 7.2 C/O or 2C/O C/O C/O + C/O / 45 V C 50 / 60 Hz, / 2 V DC V C 50 Hz vailable with external GF module with TM release and Inbuilt protection with Microprocessor release S % D % 630 D , 60, 0, 3, 400, / IEC / E / IS % x.5 x x.5 x / 7.8 C/O or 2C/O C/O C/O + C/O / 45 V C 50 / 60 Hz, / 2 V DC V C 50 Hz S % % 800 / 00 / 0 D , 00, 0 3 / IEC / E / IS < msec 278 x 43 x x 43 x / 6 C/O or 2C/O C/O C/O + C/O / 45 V C 50 / 60 Hz, / 2 V DC V C 50 Hz x x S % 2

15 Time - Current Characteristic Curves Thermal-Magnetic Release D0-0 D Time in Seconds Time in Seconds Multiples of Current Multiples of Current D2-60/0 D3-400/ Time in Seconds Time in Seconds Multiples of Current Multiples of Current 2 3

16 Time - Current Characteristic Curves Microprocessor Release-RC D2-0 D Time in Seconds Time in Seconds 0. 0% In 40% In 0. 0% In 40% In Multiples of Current Multiples of Current D3-630 D Time in Seconds Time in Seconds 0. 0% In 40% In 0. 0% In 40% In Multiples of Current Multiples of Current 4

17 Time - Current Characteristic Curves Microprocessor Release-RC D2-0 D sec 5 sec sec 6 sec 3 sec sec 5 sec sec 6 sec 3 sec Time in Seconds Time in Seconds % In 40% In Multiples of Current 2 4 D3-630 D sec 5 sec sec 6 sec 3 sec Time in Seconds Time in Seconds % In 40% In Multiples of Current 30 sec 5 sec sec 6 sec 3 sec % In 40% In 0. 0% In 40% In Multiples of Current Multiples of Current 2 4 5

18 Overall Dimensions D0-0 MCCB 0 (4 pole) (3 pole) s Suitable for 35 x M3-Ø2.4 Top Hat Rail Mounting Cut-out or Cut-out 2 Recommended CT number for D0 spreaders 3P 4P CM97785OOOO CM9792OOOO ote : Spreaders are available as spare Mounting & Door Cutout Details D0-0 with Spreader Links s ote : Spreaders are available as spare. It is recommended to use spreader links for enhancing termination capacity ll dimension are in mm 22 6

19 Overall Dimensions D-0 MCCB Mounting Panel (3P) 40(4P) For Four Pole D-0 with Spreader Links Spreader Link 4P MCCB Hardware Spreader Link 3P MCCB ll dimension are in mm 7

20 Overall Dimensions D2-0 MCCB O TRIP OFF Mounting & Door Cut-out Details Terminal width =.5.mm D2-0 3P with Spreader Links D2-0 4P with Spreader Links Ø O TRIP OFF O TRIP OFF = = 4 Wider gap = = Rating -0 TM 63-0 TM RC breakers ote : Spreaders are available as spare. It is recommended to use spreader links for enhancing termination capacity. ll dimension are in mm Dimension () Recommended CT number for D2 spreaders 3P 4P ST98053OOOO CM907OOOO 8

21 E D 23 C 266 Overall Dimensions D3-400/630 MCCB = = 40 O TRIP OFF = = Terminal width = 28mm Mounting & Door Cut-out Details D3-400/630 3P with Spreader Links D3-400/630 4P with Spreader Links Wider gap.5 Ø3 Ø F 42 O TRIP OFF O TRIP OFF B 5 Wider gap Type D3-400 D B C Recommended CT numbers for D3 spreaders D Rating 3P 4P E ST98065OOOO ST98066OOOO ote : Spreaders are available as spare. It is recommended to use spreader links for enhancing termination capacity. F ST98054OOOO CM904OOOO ll dimension are in mm 9

22 Overall Dimensions D4-800/00/0 MCCB C 4 POLE * - 46 ( version) 42 (S version) D4-800 MCCB with Spreader Links 60 B Wider gap D4-00/0 MCCB with Spreader Links B D4-800/00/0 MCCB C Dimensions Recommended CT numbers for D4 spreaders Type B C Rating 3P 4P ST9036OOOO ST90362OOOO 00/0/ /0 ST98055OOOO ST98058OOOO ote : Spreaders are available as spare. It is recommended to use spreader links for enhancing termination capacity. ll dimension are in mm

23 ROM Door cut-out details Direct ROM door cut-out detail L5 L4 L3 L2 L L = Mounting Depth L2/L3 = Panel Cut-out L4/L5 = Breaker Mounting Refer Type D0 D L L L L L D D Extended ROM door cut-out detail L2 Ø L3 Ø76 Ø4 L=Minimum Panel Depth suggested L L = Length of Shaft Required for Panel Depth L Total Length of Shaft =275mm Refer Panel Cut Details TYPE L L L2 Refer Panel Cut Details L3 D0 69 L D 69 L D2 2 L D3 233 L D4 302 L ll dimension are in mm 2

24 Overall Dimensions MCCB with EOM (Stored Energy) D Mounting holes for MCCB = = Door Door cut out Cat. o. CM9830OOOO Panel Mounted Key Lock Holes, Ø4.2 Ø76 Ø Ø50 Cut-out for Handle ssembly Cut-out for Panel Mounted Key Lock 2.2 Ø29 ll dimension are in mm 22

25 Overall Dimensions D2 MIL Kit Ø Mounting Holes Holes for Breaker Mounting D3 MIL Kit Ø Mounting Holes Holes for Breaker Mounting ll dimension are in mm 23

26 Overall Dimensions External eutral CTs D2 / D3 K L B G C D F Bottom Side J H Bottom Side G ØF E B C D E F G D D D daptor Terminal H J K L M D D D O TRIP ote: dapter Terminals shown are not available with product. kindly refer accessories data for ordering separately. Circuit Breaker shown for reference only. OFF Bottom Side >M ll dimension are in mm 24

27 Overall Dimensions External eutral CTs D4 H M D J K G C B ØF E D4 B C D E F G / D4 H J K L M / ote: dapter Terminals shown are not available with product. kindly refer accessories data for ordering separately. Circuit Breaker shown for reference only. Special ote: dapter Terminals for D4 range of product are not symmetrical. Kindly insure proper orientation in assembly as shown in figure below. >L ll dimension are in mm

Moulded Case Circuit Breakers

L&T SWITCHGER S F E & S U R E imp: k U 8 V Ue V, 60Hz. :4 0/ Ic u : 70k, I :0%I C T: cs cu D2 S IS 3947-2 IEC 60947-2 E 60947-2 - Moulded Case Circuit Breakers bout us Larsen & Toubro is a technology-driven