Air Circuit Breakers

Transcription

1 Air Circuit reakers

2 About us Larsen & Toubro is a technologydriven company that infuses engineering with imagination. The Company offers a wide range of advanced solutions in the field of Engineering, Construction, Electrical & Automation, Machinery and Information Technology. L&T Switchgear, which forms part of the Electrical & Automation 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 eperience 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 markings and are certified. Switchgear Factory, Mumbai Switchgear Factory, Ahmednagar

3 Air Circuit reakers L&T s Air Circuit reakers (ACs) are specially designed for etreme tropical conditions and have a proven track record more than 30 years. Presently more than 3,00,000 Air Circuit reakers supplied by L&T are being used for diverse applications. The Air Circuit reakers provide technologically driven solutions to meet customer needs. Complete selectivity Unique feature of lcu=lcs=lcw for 1 second across the entire range. This ensures complete selectivity for system with time based discrimination. Perfect for Indian conditions Inherent design to perform in etreme tropical conditions. Typical site conditions like high ambient temperature, humidity and dusty environment are best handled by ACs without compromising on performance and safety. Optimal compactness Designed to ensure Low inherent temperature rise Adequate interface clearances Widest choice of over current protection releases Advance microcontroller based with option of communication & meteringsr71 Micro processor based releasessr1i/sr18/sr18g Thermomagnetic releasedn1 Elegant design & rugged construction Common door cutout for entire range Left aligned cutout for all ratings Uniform height and depth for ACs up to 00 Amp Range to meet every customer s need Various options to choose from reaking capacity from 35kA to 100kA 3 Pole or Pole configuration Fied or Drawout version Auto or Manual reset mechanism Independent manual or stored energy type manual or electrically operated mechanism Different terminal orientations : Flat, Horizontal and Vertical 1

4 User friendly features Front accessible over current release settings, telescopic racking handle and various racking interlocks; no need to open the panel door Unique Maintenance position in drawout type ACs to facilitate maintenance & inspection without removing AC from the panel Multitap CTs for enhancing protection range for eample: 300A. AC can be set to have a thermal protection from 800A Wide variety of Amperemetric and Voltmetric releases Fully rated neutral pole for the entire range Lockable sliding shutters to prevent unauthorized access to TRIP and CLOSE push buttons Can be used as an ON / OFF Load Isolator Etendable Electrical Life: y replacing the arcing contacts at site, for all ratings Without changing pole assembly Programmable SICs: Auiliary contacts in drawout ACs are programmable for only Service, Only Test, Test and Service, and All Positions Unique gasket for IP5 protection Protection releases are easily interchangeable at site Facility for site conversion of manually operated ACs to electrically operated ACs Safety marked for C, S & H ranges Superior quality engineering grade plastics used for insulation purpose; conforms to Glow wire test (Ref: IEC 6951) Inbuilt mechanical antipumping for electrically operated ACs prevent auto reclosing of AC on fault Inbuilt rating error preventor in drawout ACs ensure correct rating of drawout porton in corresponding cradle Safety shutters prevent accidental contact with live cradle terminals Variety of Safety Interlocks (Refer to page no. 1) Easily removable arc chutes without use of any tool Operating voltage ranges from 10% Un to 110% Un for shunt release ensures intentional tripping even at high voltage drops during short circuit Conformance to standards IEC 97 (Part 1 & ) IS/IEC 97 (Part 1 & ) IEC S EN 97

5 Product Certification 3

6 Technical Data Sheet Rating (A) Type Designation E E E C H E C H E C H E C H E C H C H H0 H1 H0 H C C Rated current (A) at C I n Rated operational voltage (V), /Hz * U e Rated insulation voltage (V), /Hz U i No. of poles 3 3 3/ 3 3/ 3 3/ 3 3/ 3 3/ 3 3/ 3/ 3/ 3/ 3/ 3/ Rated ultimate short circuit breaking I cu 380/15/0V capacity /Hz (ka rms) 6/690V Rated service short circuit breaking I cs 380/15/0V capacity /Hz (ka rms) 6/690V Rated short time 0.5 sec withstand capacity ** I cw 1 sec /Hz (ka rms) 3 sec Rated making capacity I cm 380/15/0V /Hz (ka peak) 6/690V Rated impulse withstand voltage U imp of main circuit (kv) Rated impulse withstand voltage U imp of au. circuit (kv) Typical opening time (ms) Typical closing time (ms) Utilization category Suitability for isolation Fied Draw out Manual Electrical Electrical & Mechanical life (operating cycles) Electrical life without maintenance Dimensions (in mm) Fied H W 3 Pole Pole D Draw out H W 3 Pole Pole D * Please consult us for application at dc voltages & higher operational voltage upto V ac ** Icw values are indicated based on thermal considerations. While selecting a breaker please ensure that Icw requirement for the application is not more than Ics / Icu at the point of installation. Electrical life = Mechanical life. However, arcing contacts need to be replaced depending upon wear. Please consult us. 5

7 Protection releases Microprocessorbased, Communicationcapable Release SR71 Salient Features Microcontroller based RMS sensing Offers comprehensive protection for overload, short circuit, instantaneous, earth fault and neutral overload High resolution backlit LCD display Intelligent Pretrip alarm to prevent system shutdown Password protected setting and commands MODUS RTU protocol Intrinsic RS 85 port Total breaker control and monitoring through PC LED indication for POWER ON, different faults and Pretrip alarm sets of storable protection setting Nonvolatile memory to store last 5 trips 8 Event recording with time & date stamping 3 programmable contacts1 for micro controller failure, for basic fault annunciation relay contacts for indication of eceeding maimum demand, Pretrip alarm and control on breaker (closing and opening) Autodoubling features to prevent nuisance tripping Selectable I t based current for shorttime and earth fault zones Thermal reflectivity enables faster tripping on recurrent overloads Intelligent discrimination Selfdiagnostic and monitoring with tricolour LED indication Conformance to EMC standards Parameter Screen Abbreviation Details Factory Settings 6 Overload (Phase) Neutral Fault Short Circuit Instantaneous Earth Fault Current Settings (A), Ir = In... Time Delay, Tr (sec) at 6 Ir Pretrip Alarm Settings Thermal Reflectivity Current Settings (A), In = Ir... Time Delay (sec) Current Settings (A), Is = In... Time Delay, Ts (msec) at 10 In Pretrip Alarm Settings l t Coldload Pickup Coldload Pickup Delay Current Settings (A), Ip = In... Current Settings (A), Ig = In... Time Delay (sec), Td Pretrip Alarm Settings l t Coldload Pickup l t OFF l t ON TMStr PREALAR THMMEM PREALAR l t COLDPIC CP_DLY PREALAR l t COLDPIC 0. to 1.0 In in steps of 0.05 In to 0.95 Ir in steps of 0.05 Ir ON / OFF Same as 'Overload (Phase)' to 10 In in steps of 0.5 In to 0.95 Is in steps of 0.05 Is ON / OFF 0.1 to 10 sec in steps of 0.1 sec to 16 In in steps of 0.1 In 0.1 to 0.6 in steps of 0.05 In for l t ON 0.1 to 0.6 in steps of 0.01 In for l t OFF 100 to 0 msecs in steps of 100 msec for l t ON 0.1 to 5 sec in steps of 100 msec for l t OFF 0.5 to 0.95 Ig in steps of 0.05 Ig ON / OFF 1.0 In 30 sec 0.95 Ir OFF 1.0 Ir 30 sec 10 In 0 msec 0 msec 0.95 Is 0.1 sec Enable 16 In Enable 0.6 In 3 sec 0.95 Ig OFF Note: oth Protection Groups 1 & carry the same factory settings.

8 Additional Protections Parameter Screen Abbreviation Details Factory Settings Under Current Current Setting (A) In 15% to 80% in steps of 5% In 0.8 In Time Delay (secs) 1 to 55 in steps of 1 second 1 second Trip / Alarm MODE Either / oth Alarm Current Unbalance Current Setting (A) In 10% to 95% in steps of 5% In 0. In Time Delay (secs) 1 to 10 in steps of 5 secs.0 secs Over Voltage# Voltage Setting (V) Vs = Vn.. % to 1% in steps of 5% Vn 1. Vn Time Delay (secs) 0.1 to 100 in steps of 0.1 secs 5.0 secs Reset Voltage RSTSET 85% to 98% in steps of 1% Vs 0.95 Vs Trip / Alarm MODE Either / oth Alarm Under Voltage# Voltage Setting (V) Vn.. 5% to % in steps of 5% Vn 0.6 Vn Time Delay (secs) 0.1 to 5 in steps of 0.1 secs 1 second Reset Voltage RSTSET 10% to 115% in steps of 1% Vs 1.0 Vs Trip / Alarm MODE Either / oth Alarm Under Frequency# Frequency Setting (Hz) 5 to Hz for Hz in steps of 0.01Hz 57 to Hz for Hz in steps of 0.01Hz 8.0Hz 59.0Hz Time Delay (secs) 0.1 to 100 secs in steps of 0.1 Second 0. secs Drop Off Frequency DRPOFF 0.0 to 0.10Hz in steps of 0.1Hz 0.1Hz Trip / Alarm MODE Either / oth Alarm Over Frequency# Frequency Setting (Hz) to 55Hz for Hz in steps of 0.01Hz to 6Hz for Hz in steps of 0.01Hz 5.0Hz 61.0Hz Time Delay (secs) o.1 to 100 secs in steps of 0.1 second 0. secs Drop Off Frequency DRPOFF 0.0 to 0.10Hz in steps of 0.1Hz 0.1Hz Trip / Alarm MODE Either / oth Alarm Reverse Power# Settings (kw) 0.0 to 0. in steps of 0.01 Pn 0. Pn Time Delay (secs) 1 to 100 in steps of 0.1 secs.0 secs Trip Alarm MODE Either / oth Alarm Phase Sequence# Settings Time Delay (secs) 0 to 5 in steps of 0.5 secs secs reaker Failure Trip / Alarm MODE Either / oth Alarm Time Delay (secs) 0.05 to secs in steps of 0.01 secs 1.0 second Maimum Demand Eceed Settings (kw) kw 10 kw 100 kw Step 10 kw kw 10 kw i Discrimination i Discrimination # Requires SR71PM module 7

9 Metering Parameter Screen Abbreviation Details Current Voltage# Frequency# Power Factor# Power# Energy# HarmonicCurrent HarmonicVoltage# Display # Requires SR71PM module Additional Features I Ima %Load V VphVph F PF kw kvar kva kw kwh kvarh kvah I1HAR IHAR I3HAR V1HAR VHAR V3HAR Phase, Earth and Neutral Maimum running Current per Phase Percent Loading PhaseNeutral PhasePhase System Frequency System Power Factor Active Power per Phase and Total (kw) Reactive Power per Phase and Total (kvar) Apparent Power per Phase and Total (kva) Maimum Demand (kw) Total Active Energy (kwh) Total Reactive Energy (kvarh) Total Apparent Energy (kvah) RPhase Current Harmonics YPhase Current Harmonics Phase Current Harmonics RPhase Voltage Harmonics YPhase Voltage Harmonics Phase Voltage Harmonics High Resolution acklit LCD Parameter LED Indications Auiliary Supply Digital Inputs Auiliary Power ON Overload Short Circuit Instantaneous Earth Fault Neutral Fault Trip Alarm V DC Nos. Details Output Relays 3 Internal + Eternal Relays 8 Rating Plug Communication Maintenance Indication Event Records Trip Records Testing Supplementary Modules No. of Storable Settings In Multiplier Protocol Link used SelfDiagnostic Test Relay Module Power Supply Module Communication Module V AC / 5A, 30V DC / 5A (resistive load) MODUS RTU RS 85 I t based Pickup, Alarm, Trip, Date, Time and Cause of Event Last 5 records with date and time stamping, voltage and current readings in all phases Relay Outputs V DC Output MODUS RTU

10 Protection releases Microprocessor ased Release SR1i Salient Features Selfpowered True RMS sensing Zone selective interlocking on short circuit and ground faults reduces dynamic and thermal stress on the system Selfdiagnostic and selfcorrecting facility to monitor its own performance Facility for default protection setting Switchable thermal memory takes care of residual heat in case of repetitive overloads Multistate LED to indicate Power ON condition Test mode Microprocessor unhealthy condition Individual fault annunciation through LEDs On load testing release possible through TEST button (without tripping the breaker) AN1 module for remote fault indication through LEDs with changeover contact for each kind of fault Direct tripping of breakerreliable tripping with minimum time delay test kit available for testing the release (SRT) Realistic hot and cold curves which take into account integrated heating effect Conformance to EMI/EMC standards Type of Protection Long Time Short Time Instantaneous Pickup Current Ir 0.5 to 1.0 times In Steps : 0., 0., 0., 0.70, 0., 0.80, 0.85, 0.9, 0.95, 1.00 to 10 times In Steps :, 3,, 5, 6, 7, 8, 9, 10 to 16 times In Steps :, 3,, 6, 8, 10,, 1, 16, MAX (infinity) Setting Range Time Delay 0. to 30 sec. at 6 times Ir Steps : 0., 0.5, 1, 1.5,, 3.5, 6,, 17, 30 Sec 0 ms to 0 ms Steps : 0,, 100, 1, 00,, 300, 0, 0, 0 ms Ground Fault 0. to 0.6 times In Steps : 0., 0.3, 0., 0.5, to 0 ms Steps : 100, 00, 300, 0 ms & infinity In 3 phase, wire system, Neutral CT is required for ground fault protection. 9

11 Protection releases Microprocessor ased Release SR18 & SR18G Salient Features Selfpowered True RMS sensing Comprehensive protection SR18; Long Time and Short Time SR18G; Long Time, Short Time and Ground fault protection True Hot & Cold characteristics Switchable thermal memory takes care of residual heat in case of repetitive overloads Facility to have default protection settings Suitable for 800A to 6300A Multistate LED to indicate Power ON condition Test mode Microprocessor unhealthy condition Individual fault annunciation through LEDs On load testing of release possible through TEST button (without tripping the breaker) Test kit (SRT) available for testing the releases Direct tripping of breakerreliable tripping with minimum time delay Conformance to EMI/EMC standards Type of Protection Pickup Current Setting Range Time Delay Long Time Short Time Instantaneous Ground Fault* Ir 0.5 to 1.0 times In Steps : 0., 0., 0., 0.70, 0., 0.80, 0.85, 0.9, 0.95, 1.00 to 10 times Ir Steps :, 3,, 5, 6, 7, 8, 9, 10 6 & In 0. to 0.6 times In Steps : 0., 0.3, 0., 0.5, sec at 6 time s Ir 0 to 0 ms Steps : 0,, 100, 1, 00,, 300, 0, 0, 0 ms 100 to 0 ms Steps : 100, 00, 300, 0 ms & OFF * Available in SR18G release only In 3 phase, wire system, Neutral CT is required for ground fault protection. 10

12 Protection releases Thermomagnetic Over Current Release Type DN1 DN1 is CToperated thermomagnetic release, which offers reliable protection against overload, short circuit and ground faults. Protection Overload Protection Continuous & individual phase adjustable dial settings from % to 100% of CT tap Inverse Time Characteristics Short Circuit Protection Two taps available to select operating threshold Ground Fault Protection Offered with auiliary earth fault release (0% to % In) Salient Features True RMS sensing 0 0 Ambient temperature compensated from 5 C to C Wide range of overload & short circuit settings possible with multitap CTs Each phase can be individually adjusted for overload & short circuit settings Fied minimum impulsion time of 5 ms on short circuit to prevent nuisance tripping due to transients Trip test facility available 11

13 Accessories Locks/Interlocks Type Data Lockable Trip Push utton (LTP) Mounted in place of normal trip push button. With this, AC can be locked in trip condition. For interlocking, LTPs are offered in the following combinations: different types of keys i.e. AA,, CC and DD suitable for incomers and 1 bus coupler schemes Combination of L, M, N, LM and MN locks, which are suitable for three incomer and two bus coupler schemes Combination of K, L, MN, KL, LM and MN locks, which are suitable for four incomer and three bus coupler schemes Combination of J, K, L, M, N, JK, KL, LM and MN locks, which are suitable for five incomer and four bus coupler schemes View of the Cradle Locking in Isolated Position (LIP) The facility of locking the AC in Isolated position is available in Drawout ACs. This is useful to achieve interlocking between Main & Standby source. Similar lock is available as LOCK IN ANY POSITION. Door Interlock Racking Inerlock Locking in Isolated Position Door Interlock This ensures: Unless the panel door is closed, breaker cannot be racked in or out Unless the breaker is in Isolated Position, it is not possible to open the panel door Racking Interlock This ensures that breaker cannot be racked in/out unless the AC is in tripped/open condition. Mechanical Interlock It is possible to provide Mechanical Interlock between two breakers of the same or different ratings in vertical or horizontal configurations. Mechanical interlock is available for ACs up to 00A. Mechanical interlocking for ACs in vertical configuration can be provided by links or by fleible cables. Same for horizontal configuration can be provided by fleible cables.

14 Accessories Signaling Type Data C1 Common indication of tripping due to overload, short circuit and ground faults. Provided by microswitch C1 fitted inside the AC Available as an option in all releases C Separate indication of tripping due to overload, short circuit and ground faults. For release type DN1, this is provided by microswitch C1 & C (C fitted inside release) Available through inbuilt fault indicators in SR18, SR18G, SR1i & SR71 releases AN1Annunciator Module Remote indication of tripping due to overload, short circuit and ground faults. Can be used with releases type SR18/SR18G/SR1i Individual fault indication provided by three separate LEDs for Long time faults Short time fault/instantaneous fault Ground fault one potential free contact rated 5A at 30V AC available for each type of fault Flush mounting on panel (HWD=9mm 6mm mm) Operating voltage: V AC/110V DC/0V DC (other Voltages available on request) C5 Indication for operation of shunt release or under voltage release. Provided by microswitch C5 fitted on the shunt release 13

15 Accessories Control Type Data Technical Data Shunt Release For remote tripping of the breaker Shunt release coil is short time rated and is disconnected from the circuit by an auiliary contact when the AC trips (Refer to wiring diagram) Low power consumption Two types available: EA for DC application EA1 for AC application Type of Release EA1 EA Nominal voltage Uc (V) Hz AC 15 AC V DC 8V DC 110 DC 0 DC Power consumption at pick up 800 VA 800 VA 3 W 5 W 5 W 30 W Note : Other voltages available on request Operation Limit 10130% Uc 130% Uc Undervoltage Release Two types available: Type MV With no intentional time delay Parameter Nominal voltage (Uc) Specification V & 15V: Hz 0V & 15V: Hz Notes: When undervoltage release is provided, the AC can be closed only when supply is available to the undervoltage release. Pick up (V) Drop OFF (V) Consumption (VA) 80% Uc 35% Uc Pick up 3 VA Hold on 10 VA Watt loss 6 W Auiliary Contacts Two combinations available: NO + NC 6 NO + 6 NC Electrical circuit Resistive Voltage (V) to 15 AC V AC Rated current (A) Nonresistive to 15 AC V AC # # L/R = 15ms with two contacts in series Operation Counter Operates mechanically Display total number of breaker operation cycles 1

16 Overall Dimensions Fied reakers For 630A to 0A /P for Metallic Components 36 min 36 min A min 100 min 9 3 min for Insulating Sheet 0 min 1 min to Remove Arc Chute 7 Door ezel Earthing Terminal HolesØ min D E F E D Ratings CN CS Dimensions (mm) A D E F Weight (kg.) Manual Electrical 630/800/A /10A /800/A P /10A P /0A /0A P For CNCS...E 0A000A 3 min Insulator +1.0 min 316 min min min Rating Type X Y Holes Ø 385 X X 0E E 10/ 000E Y Note : All Dimensions are in mm. 15

17 Overall Dimensions Fied reakers Terminal HolesØ HolesØ to 000E & 800///10 000/0 Terminal Connections Terminal for /10/000/0 ezel Fiing Plan for all Fied reakers 33 Hinge Hinge Terminal for 800/ HolesØ min min Door Cutout Door Drilling for ezel Fiing Plan ezel 16 Note: All dimensions are in mm.

18 Overall Dimensions Drawout reakers For 630A to 300A / /P, 300H1/00H for Metallic Components A ma min for Insulating Sheet 100 min 00 min Isolated Position 51 Test Position Service Position Door 6 7 ezel * M min ma min D E F E D 6.5 Earthing Terminal 5 *Terminal For 630/800/ /, /0 & *Terminal for /10/0 & 800/H *Terminal for for 300 *Terminal for 300H0/H1 & 00H0/H Ratings CN CS A Dimensions (mm) D E F 630/800/A / 000A /10A / 630/800/A / P 000A P /10A / P 000/0A 0/300A /0A 0/300A P P A 00A H0/H1 H0/H A 00A H0/H1 H0/H P P Note : All Dimensions are in mm. 17

19 Overall Dimensions Drawout reakers Flat Terminal Connections.5 slots Slots Slots C & H, /10 & C HolesØ1 6 HolesØ HolesØ & 000H H0/H & 00H0/H1.5 For 00C/6300C A ma 10 for Metallic Components 0 min for Insulating Sheet 100 min 00 min 51 Isolated Position Test Position Service Position 6 Door 7 ezel M min 18.9 ma min D E F E D 8 HolesØ Earthing Terminal Terminal Connections 00C/6300C Ratings Dimensions (mm) A D E F 00A C A C A C P A C P Note: All Dimensions are in mm.

20 Overall Dimensions Mounting Details For Horizontal Mounting of all Drawout reakers For 630A to 300A / /P 300 H0/H1, 00 H0/H /P HolesØ11 Ratings Type G (mm) 800A 10A 80.3 *G Front 630A 000A 800A 10A P A 000A P / 0A 000 / 0A 0 / 300A 0 / 300A P P For 00C/6300C /P HolesØ A 300A 00A 00A P P H0 / H1 H0 / H1 H0 / H H0 / H ezel Fiing Plan for all Drawout reakers HolesØ Hinge Hinge / 6300A C / 6300A P C 113 ase of Cradle min A 9 5 min Door Cutout Note: For 00C/6300C AC, A = 81.5 For other Drawout reakers A =

21 Overall Dimensions Terminals Horizontal Terminals Rear Side C 10 & 800/H 000C 0 & 000H HolesØ1 3 HolesØ1 HolesØ1 6 HolesØ V S W U.0 HolesØT O P N R X M Vertical Terminals Top Side View Rear View Ratings M N P Q R S T U V W X 800/A C /10A 800/A H A C A 000A H Note : 1) All Dimensions are in mm. ) Consult us for other Terminal Orientations.

22 Switchgear Training Centres Pune Lucknow Coonoor Train & Gain This concept underlies L&T s commitment to its customers and the Indian switchgear industry. To this end, L&T has set up Switchgear Training Centers equipped with a wide range of education facilities at Pune, Lucknow & Coonoor. Specially designed HandsOn training programs on the operation & maintenance of switchgear are conducted for engineers and technicians from different industry segments. The centers have stateoftheart training facilities, wellequipped workshops and testing systems. 1

23 Notes

24 Electrical Standard Products (ESP) ranch Offices: REGISTERED OFFICE AND HEAD OFFICE L&T House, allard Estate P. O. o 78 Mumbai Tel: 0656 Fa: Website: ELECTRICAL STANDARD PRODUCTS (ESP) 1, Sakar Comple I Opp. Gandhigram Rly. Station Ashram Road Ahmedabad Tel: Fa: / espahm@lnteg.com 38, Cubbon Road, P. O. o 98 angalore Tel: Fa: espblr@lnteg.com 131/1, Zone II Maharana Pratap Nagar hopal Tel: / 7 / 8 / 9 Fa: espbho@lnteg.com Plot No. 559, Annapurna Comple Lewis Road hubaneswar 1 01 Tel: 06713, Fa: espbbi@lnteg.com SCO 3, Sector 6D Madhya Marg, P. O. o 1 Chandigarh 1 06 Tel: , Fa: espchd@lnteg.com 10, Club House Road Chennai 0 00 Tel: / / 5 / 109 Fa: / 3 espmaa@lnteg.com 67, Appuswamy Road Post ag 7156 Opp. Nirmala College Coimbatore Tel: / 1 / 5 Fa: espcbe@lnteg.com L&T House, Group MIG5 Padmanabhpur Durg Tel: / 1 / 1 / 9 Fa: Khairasol, Degaul Avenue Durgapur 713 Tel: 55988, 55989, 5598 Fa: espdgp@lnteg.com Milanpur Road, amuni Maidan Guwahati Tel: Fa: espgau@lnteg.com II Floor, Vasantha Chambers , Fateh Maidan Road Hyderabad 000 Tel: Fa: esphyd@lnteg.com D, Prithvi Raj Road, CScheme Jaipur Tel: / 16 / 17 / 18 Fa: espjai@lnteg.com Akashdeep Plaza, nd Floor P. O. Golmuri Jamshedpur Jharkhand Tel: / 387 Fa: espjam@lnteg.com Skybright ldg; M. G. Road Ravipuram Junction, Ernakulam Kochi Tel: 0890 / / 5 / 7 Fa: espcok@lnteg.com 3, Shakespeare Sarani Kolkata Tel: / 3 / Fa: espccu@lnteg.com A8, Indira Nagar, Faizabad Road Lucknow Tel: / 5 / 6 Fa: esplko@lnteg.com No: 73, Karpaga Nagar, 8th Street K. Pudur Madurai 607 Tel: 05537, Fa: espmdu@lnteg.com EG North Wing OfficeLevel Gate 7, Powai Campus Mumbai 0 07 Tel: / 737 / 1156 Fa: espbom@lnteg.com #, Shivaji Nagar North Ambazari Road Nagpur 010 Tel: 070 / 3 Fa: 0700 / 30 espnag@lnteg.com 3, Shivaji Marg P. O. o 63 New Delhi Tel: / 5 / 6 Fa: espdel@lnteg.com L&T House P. O. o /1, Dhole Patil Road Pune Tel: Fa: , esppnq@lnteg.com 3rd Floor Vishwakarma Chambers Majura Gate, Ring Road Surat Tel: Fa: espsur@lnteg.com Radhadaya Comple Old Padra Road Near Charotar Society Vadodara Tel: / 1 / Fa: espbar@lnteg.com 8816, Dwarakanagar Visakhapatnam Tel: / 3 Fa: espviz@lnteg.com Product improvement is a continuous process. For the latest information and special applications, please contact any of our offices listed here. Electrical Standard Products Larsen & Toubro Limited Powai Campus, Mumbai 0 07 Customer Interaction Center (CIC) SNL / MTNL (toll free) : Reliance (toll free) : Tel : Fa : cic@lnteg.com Website : SP 37(R) 70111