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S1 Range of Air Circuit Breakers
L&T’s Air Circuit Breakers ( ACBs ) are specially designed for extreme tropical conditions and have a proven track of record of more than 35 years. Presently, more than 3,00,000 Air Circuit Breakers supplied by L&T are being used for diverse applications.
Complete selectivity Unique feature of Icu = Ics = Icw , across the entire range. This ensures complete selectivity for system with time based discrimination.
Perfect for Indian condition Inherent design to perform in extreme tropical conditions . Typical site conditions like high ambient temperature and humid, dusty environment are best handled by S1 Range of ACBs without compromising on performance and safety.
Optimal compactness Designed to ensure
• Comfort in Al link terminations. Results in lesser joints
• Low inherent temperature rise
• Adequate interphase clearance
Choice of Overcurrent protection release S1 Range of ACBs provided with comprehensive overcurrent protection releases
• Microprocessor based – SR18G ( LSIG )
• Microprocessor based ‐ SR18 ( LSI )
• Thermo‐magnetic based – DN1 (LS )
Elegent design & rugged construction
• Common door cutout for entire range
• Left aligned cutout for all rating
• Uniform height and depth throughout the entire range
S1 Range to meet customers’ need Various options to choose from
• Breaking capacity from 50kA to 60 kA
• 3 Pole or 4 Pole configuration
• Drawout version
• Auto or Manual Reset mechanism
• Independent manual or stored energy type manual or electrically operated mechanism
USER FRIENDLINESS
• Front accessible over current release settings, telescopic racking handle and various racking interlocks. No need to open the panel door.
• Unique ‘ Maintenance position ‘ to facilitate maintenance & inspection without removing ACB from the panel.
• 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 button.
• Can be used as an ON / OFF Load Isolator.
• Extendable Electrical Life : By replacing the arcing contacts at site , for all rating. Without changing the pole assembly.
• Progammable SICs : Auxiliary contacts are programmable for only SERVICE , only TEST , TEST and SERVICE, and ALL POSITIONS .
• Unique gasket for IP54 protection.
• Protection release are easily interchangable at site.
• Facility for site conversion of manually operated ACBs to electrically operated ACBS.
……SAFETY……...........
• Superior quality engineering grade plastics used for insulation purpose. Conform to Glow Wire Test ( IEC 60695 ‐2‐1 ).
• In‐built Mechanical anti‐pumping for electrically operated ACBs to prevent auto reclosing of ACB on fault.
• In‐built Rating error preventor to ensure correct rating of drawout portion in corresponding cradle.
• Safety shutters to prevent accidental contact with live cradle terminals.
• Variety of Safety Interlocks.
• Easily removable Arc Chute without use of any tool.
• Operating voltage ranges from 10% Un to 110% Un for shunt release ensure that internal tripping even at higher voltage drops during short circuit
Technical data sheet : Rating (A) 630 800 1000 1250 1600 2000 2500 3200 Type Designation S1 S1 S1 S1 S1 S1 S1 S1 Rated current (A) at 40°C In 630 800 1000 1250 1600 2000 2500 3200 Rated operational voltage (V), 50/60Hz Ue 415 415 415 415 415 415 415 415
Rated insulation voltage (V), 50/60Hz Ui 1000 1000 1000 1000 1000 1000 1000 1000
No. of poles 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4
Rated ultimate short circuit breaking capacity 50/60Hz (kA rms) Icu
380/415/500 V 50 50 50 50 50 50 60 60
Rated service short circuit breaking capacity 50/60Hz (kA rms) Ics
380/415/500 V 50 50 50 50 50 50 60 60
Rated short time withstand capacity 50/60Hz (kA rms)
Icw* 50 50 50 50 50 50 60 60
Rated making capacity 50/60Hz (kA peak) Icm 380/415/500
V 105 105 105 105 105 105 132 132
Rated impulse withstand voltage of main circuit (kV) Uimp 12 12 12 12 12 12 12 12
Rated impulse withstand voltage of aux. circuit (kV) Uimp 4 4 4 4 4 4 4 4
Typical opening time (ms) 40 40 40 40 40 40 40 40 Typical closing time (ms) 60 60 60 60 60 60 60 60 Utilization category B B B B B B B B Suitability for isolation
Draw out
Manual
Electrical
Electrical & Mechanical life (operating cycles) ‡ 15000 20000 20000 20000 20000 20000 20000 10000 Electrical life without maintenance 6000 6000 6000 6000 6000 4500 4500 4500 Dimensions Draw-out H 468 468 468 468 468 468 468 468
W 3 Pole 399 399 399 399 399 399 555 555
4 Pole 487 487 487 487 487 487 701 701 D 587 587 587 587 587 587 587 587
‡ Electrical life = Mechanical life. However, arcing contacts need to be replaced depending upon wear.
* Icw values are for 500msec ; 1 sec Icw values for 630-2000A = 42kA ,2500A =55kA & 3200A = 60kA
Protection Releases:
1. Microprocessor based ‐SR18/SR18G
Characteristic Curve:
Thermo Magnetic based – DN1
Accessories for Locking & Interlocking:
Accessories for Signaling:
Accessories for control:
Over all dimensions :
Terminal for 630‐1250 S1 & 2500 S1
Terminal for 3200 S1 Terminal for 1600 & 2000 S1
Current Ratings Dimensions
A D E F
630 to 2000 S1 3P 399 97.5 102 -
2500/3200 S1 3P 555 123.5 154 -
630 to 2000 S1 4P 487 96.5 98 98
2500/3200 S1 4P 701 122.5 150 156
Note : All dimensions are in mm
Flat terminal connections :
630 ‐1250 S1 1600‐2000 S1
2500 S1 3200 S1 Mounting Details :
Current Rating G (mm )
630 to 2000 S1 3P 280.3
2500/3200 S1 3P 436.3
630 to 2000 S1 4P 368.3
2500/3200 S1 4P 582.3
Note : All dimensions are in mm
REGISTERED OFFICE AND HEAD OFFICEL&T House, Ballard EstateP. O. Box 278Mumbai 400 001Tel: 022-6752 5656Fax: 022-6752 5858Website: www.Larsentoubro.com
ELECTRICAL STANDARD PRODUCTS (ESP)501, Sakar Complex I Opp. Gandhigram Rly. Station Ashram RoadAhmedabad 380 009Tel: 079-66304007-11Fax: 079-26580491 / 66304025e-mail: [email protected]
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Product improvement is a continuous process. For the latest information and special applications, please contact any of our offices listed here.
Electrical Standard Products (ESP) Branch Offices:
L&T House, Group MIG - 5 PadmanabhpurDurg 491 001Tel: 0788-2213833 / 14 / 28 / 29Fax: 0788-2213820
A1/11, Astronauts Avenue Bidhan NagarDurgapur 713 212Tel: 0343-2536891 / 8952 / 7844Fax: 0343-2536493 e-mail: [email protected]
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D-24, Prithvi Raj Road, C-SchemeJaipur 302 001Tel: 0141-2385916 / 8Fax: 0141-2373280e-mail: [email protected]
Akashdeep Plaza, 2nd Floor P. O. GolmuriJamshedpur 831 003JharkhandTel: 0657-2340864 / 387Fax: 0657-2341250e-mail: [email protected]
Skybright Bldg. M. G. RoadRavipuram Junction, ErnakulamKochi 682 016Tel: 0484-4409420 / 4 / 5 / 7Fax: 0484-4409426e-mail: [email protected]
3-B, Shakespeare SaraniKolkata 700 071Tel: 033-44002572 / 3 / 4 Fax: 033-22822589e-mail: [email protected]
A28,Indira Nagar, Faizabad Road Uttar Pradesh, Lucknow 226 016Tel: 0522-2312904 / 5 / 6Fax: 0522-2311671e-mail: [email protected]
No: 73, Karpaga Nagar, 8th StreetK. PudurMadurai 625007Tel: 0452-2537404, 2521068Fax: 0452-2537552e-mail: [email protected]
EBG North Wing Office - Level 2, Gate 7, Powai CampusMumbai 400 072Tel: 022-67052874 / 2737 / 1156Fax: 022-67051112e-mail: [email protected]
#12, Shivaji NagarNorth Ambazari RoadNagpur 440 010Tel: 0712-2260012 / 3Fax: 0712-2260020 / 30e-mail: [email protected]
32, Shivaji Marg P. O. Box 6223New Delhi 110 015Tel: 011-41419514 / 5 / 6Fax: 011-41419600e-mail: [email protected]
L&T House P. O. Box 119 191/1, Dhole Patil RoadPune 411 001Tel: 020-26135048Fax: 020-26124910, 26135048e-mail: [email protected]
3rd Floor Vishwakarma ChambersMajura Gate, Ring RoadSurat 395 002Tel: 0261-2473726Fax: 0261-2477078e-mail: [email protected]
Radhadaya ComplexOld Padra RoadNear Charotar SocietyVadodara 390 015Tel: 0265-2311744 / 6613610 / 1 / 2Fax: 0265-2336184e-mail: [email protected]
48-8-16, DwarakanagarVisakhapatnam 530 016Tel: 0891-6620411-2 / 3Fax: 0891-6620416e-mail: [email protected]
210910SP 00000
Electrical Standard ProductsLarsen & Toubro LimitedPowai Campus, Mumbai 400 072Customer Interaction Center (CIC)BSNL / MTNL (toll free) : 1800 233 5858Reliance (toll free) : 1800 200 5858Tel : 022 6774 5858Fax : 022 6774 5859E-mail : [email protected] : www.LNTEBG.com
