Moulded Case Circuit Breakers

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1 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 IEC E Moulded Case Circuit Breakers

2 bout us Larsen & Toubro is a technology-driven USD 8. billion company that 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, which forms 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 four decades of experience in this field, the Company today enjoys a leadership position in the Indian market with growing presence in international markets. It offers a complete range of products including controlgear, powergear, motor starters, energy meters, wires and host of other accessories. Most of our product lines conform to international standards, carry CE marking and are certified. 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 CE 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 Salient Features ccessories 7 Widest Range Time-Current Characteristics 2 Overall Dimensions D4 D3 D2

4 The Complete Range Features From 63 to 3 Pole & 4 Pole Choice of 36k/0k/70k breaking capacities With protection releases in Microprocessor, Thermal-Magnetic and only Magnetic MCCBs for distribution and SD versions Manual, rotary or motorised versions Wide range of internal and external accessories D2 Rated Current Release Rated Current Release Rated Current Release 63, 80, 0, 2, 60, 0, Thermal-Magnetic 3, 400, 00, 630 Thermal-Magnetic D3 D4 800, 00, Microprocessor 40, 63, 0, 60, Microprocessor 63, 60,, 400, 630 Microprocessor Breaking Capacities Breaking capacity 36k 0k 70k Old Type Designation S (3k) 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 Features of Thermal-Magnetic Release djustable overload settings djustable short circuit settings True RMS sensing o contact with live parts Protection Settings D2 & D3 *Except for 630 MCCBs. Setting from 3-6 In available on request. Overload Short circuit* Earth fault 80% - 0% In 6 - In* External Microprocessor Release Features of RC Microprocessor Release 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 Power O LED 7 Self powered protections True RMS sensing Rated Current In () Current setting, Ir (Ir = XIn) Time delay, tr (Inverse) Protection mode Current setting, In (Intrl = XIr) 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 63 to Overload (Phase) OFF, 0.4 to.0 in steps of 0. sec at 6Ir O / OFF Overload (eutral) 0.,0.7 &.00 Intrl Inverse sec at 6 Intrl / Fixed 0ms O / OFF Short Circuit., 4 & 6Ir Inst. / 0 msec O / OFF Instantaneous Over ride D2-8In, D In, D In, D4-8In Earth Fault 0.2 to 0.In steps of 0. 0 / 0 msec O / OFF 2

6 Protection Releases Microprocessor Release Features of RC - Communication Capable Communication using RS 48 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 ts (ms) 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 63 to to.0 in steps of 0. 3, 6,,, 30 at 6Ir O / OFF 0.8 to.0ir in steps of 0.0 O / OFF 0%, 0% In O / OFF., 4, 6Ir 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 0.0 Is Enable / Disable. to 8In in steps of 0.In O / OFF Enable / Disable D2-8In, D In, D In, D4-8In 0.2 to 0.In steps of 0.In 0., 0.2, 0.,, 3 sec. 0.8 to.0 Ig in steps of 0.0 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 % to in steps of 0. O / OFF Enable / Disable Temperature rise t 80ºC / t 0ºC Metering Phase, eutral and Earth Backlit LCD Communication* MODBUS RTU RS 48 Pickup, Trip, larm upto 28 records-volatile memory Last trips records - non volatile memory Counts for total number of trips * To establish communication with computer every MCCB with RC will require a communication module. 4

8 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. 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.

9 State-of-the-art technology Common Internal accessories The internal accessories remain same across D2 / D3 / D4 range* and they are snap fit type easy to install LIE o load line bias Either side of MCCB terminal can be used as load or line 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 In Visibility Push to trip button and release ratings are visible even when release plate is fitted * Except under voltage release 6

10 I u : 70k, imp 8 V CT: I u : 70k, c 0 I u im p CT: ccessories Internal ccessories range of MCCBs come 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 (suitable for electrical interlocking) U e :4V, 0/60Hz. U : k cs c D2-S c I :0%I u IS IEC E U e :4V, 0/60Hz. U :8kV c I : % s c D2-S IS IE C E MCCB with mid cover opened & Internal accessories fitted External ccessories Extended Rotary Handle (Panel Mounted) ROM mounts directly on the MCCB without removal of mid cover Clear O / OFF / TRIP indication Clear view of the MCCB rating label with ROM mounted Direct access to push to trip button with ROM mounted IP 4 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 Extended Rotary Handle: Panel Mounted Panel Door Mounted Key lock (To be used along with extended rotary handles) Rotary Operating Mechanism The rotary operating mechanism (ROM) for available in Direct & Extended versions. MCCBs are Direct rotary handle (MCCB mounted) These versions are available for the entire family of MCCBs. 7

ccessories Mechanical Interlocking Schemes. Mechanical Interlocking Kit: Two MCCBs can be interlocked using base plate mechanism, in side-by-side configuration.

11 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 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

12 ccessories Electrical Operating Mechanism Features Clear O / OFF indication Safety Interlock-EOM will not operate if EOM cover is open EOM is not properly fixed on MCCB Permits manual operation, If required Padlock facility for locking in OFF position Easy access to the protection setting on the MCCBs * 240 VC available on request External eutral CTs The External eutral CT is an add-on accessory of the 3P MCCB that gives protection against neutral faults. Thus, with an External eutral CT, a 3P MCCB can be used for full protection of a 3 phase, 4 Wire system*. * Contact nearest branch for details & availability 9

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 0 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 takes 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. MIL with Base Plate & EOM

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) (max) Rated Insulation Voltage (V) Utilisation Category Standard IEC Life span Icu (k) Operating Frequency (Hz) Total Opening Time Finger-proof Terminals mbient Temperature Storage Temperature Mounting Positions Ics as % lcu Dimensions (W x D x H) Weight (kg) (3/4 Pole) Internal External 230 / 240 V 400 / 4 V 00 V 0 V 600 V 690 V V DC (3P in series) 00 V DC (3P in series) L/ R<msec 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 D % D2-63, 0, 2, 60, 0 & 3 / IEC / E / IS / GB % x 96 x x 96 x / 3.3 C/O or 2C/O C/O C/O + C/O - 4 V C 0 / 60 Hz, - 2 V DC V C 0 Hz S % D % 0 / 60 < msec Yes o o - to C o o -3 to 70 C 400 D , 60,, 3, / IEC / E / IS / GB % o Vertical and 90 in both directions 40 x. x x. x 266. / 7.2 C/O or 2C/O C/O C/O + C/O - 4 V C 0 / 60 Hz, - 2 V DC V C 0 Hz Inbuilt protection with Microprocessor release S % D 630 D , 60,, 3, 400, / IEC / E / IS / GB S % % x. x x. x / 7.8 C/O or 2C/O C/O C/O + C/O % - 4 V C 0 / 60 Hz, - 2 V DC V C 0 Hz Inbuilt protection with Microprocessor release 800 / 00 / D4-800, 00, 3 / IEC / E / IS / GB S % 0% < msec 278 x 43 x x 43 x 370 / 6 C/O or 2C/O C/O C/O+C/O - 4 V C 0 / 60 Hz, - 2 V DC V C 0 Hz x Inbuilt protection with Microprocessor release $ : 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)

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

16 Time - Current Characteristic Curves Microprocessor Release-RC D2- D Time in Seconds Time in Seconds % In 40% In Multiples of Current D3-630 D4- Time in Seconds Time in Seconds % In 40% In Multiples of Current % In 40% In 0. 0% In 40% In Multiples of Current Multiples of Current 2 4 3

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

18 Overall Dimensions D2- MCCB O TRIP OFF Mounting & Door Cut-out Details Terminal width = 2..mm D2-3P with Spreader Links D2-4P with Spreader Links O TRIP OFF O TRIP OFF = = 2. 4 Wider gap = = Recommended CT number for D2 spreaders ote : Spreaders are available as spare. It is recommended to use spreader links for enhancing termination capacity. ll dimension are in mm 3P ST9803OOOO 4P CM907OOOO

19 E D 23 C Overall Dimensions D3-400/630 MCCB O TRIP OFF = = B = = Terminal width = 28mm Mounting & Door Cut-out Details D3-400/630 3P with Spreader Links D3-400/630 4P with Spreader Links Wider gap Ø F 42 O TRIP OFF O TRIP OFF B Wider gap Type D3-400 D B C Recommended CT numbers for D3 spreaders D Rating 3P 4P E ST9806OOOO ST98066OOOO ote : Spreaders are available as spare. It is recommended to use spreader links for enhancing termination capacity. F ST9804OOOO CM904OOOO ll dimension are in mm 6

20 Overall Dimensions D4-800/00/ MCCB D4-00/ MCCB with Spreader Links D4-800 MCCB with Spreader Links 60 B 24 Wider gap B D4-800/00/ MCCB C 32. Dimensions Recommended CT numbers for D4 spreaders Type B C Rating 3P 4P ST9036OOOO ST90362OOOO 00// / ST980OOOO ST9808OOOO ote : Spreaders are available as spare. It is recommended to use spreader links for enhancing termination capacity. ll dimension are in mm 7

21 ROM Door cut-out details Direct ROM door cut-out detail L 7 L4 L3 L2 L L = Mounting depth L2/L3 = Panel cut-out L4/L = Breaker mounting reference Type D0 D2 L L L L L D Extended ROM door cut-out detail L2 Ø0 0 4 L3 Ø76 Ø4 L L L = Length of shaft required for panel depth L Refer panel cut details Type L L L2 L3 D0 69 L D2 2 L D3 233 L D4 302 L ll dimension are in mm 8

22 Overall Dimensions MCCB with EOM Type Dimensions in mm B C For D2 EOM For D3 EOM Panel Mounted Key Lock 72 2 Holes, Ø4.2 Ø76 Ø0 0 4 Ø0 Cut-out for Handle ssembly B O C OFF 4 pole 3 pole Cut-out for Panel Mounted Key Lock 2.2 Ø29 ll dimension are in mm 9

23 Overall Dimensions D2 MIL Kit 30 Ø Mounting Holes Holes for Breaker Mounting D3 MIL Kit Ø Mounting Holes Holes for Breaker Mounting ll dimension are in mm

24 Overall Dimensions External eutral CTs 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 2

25 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 ensure proper orientation in assembly as shown in figure below. >L ll dimension are in mm 22

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

L&T SWITCHGEAR S A F E & S U R E. Moulded Case Circuit Breakers L&T SWITCHGER S F E & S U R E Moulded Case Circuit Breakers Introduction Larsen & Toubro infuses engineering with imagination. The Company offers a wide range of advanced solutions in the field of Engineering,