AIR CIRCUIT BREAKERS - Electrical and Electronics Division

1 Rating (A) 400 630 800
Type Designation CN-CS CN-CS CN-CS..E CN-CS..E S C H
Rated Current (A) 400C In 400 630 630 800 800 800 800
Rated Operational Voltage (V) 50/60Hz Ue* 415 415 415 415 415 415 415
Rated insulation voltage (V), 50/60Hz Ui 690 690 690 690 1000 1000 1000
No. of poles 3 3 3 3 3 3/4 3/4
Rated ultimate short circuit Icu
breaking capacity
50/60Hz (kA rms)
380/415/500V 36.6 36.6 25 36.6 50 50 65
Rated service short circuit Ics
breaking capcity
50/60Hz (kA rms)
380/415/500V 36.6 36.6 25 36.6 38 50 65
Rated short time withstand capacity Icw 0.5sec 36.6 36.6 25 36.6 38 50 65
50/60Hz (kA rms) 1sec 25 25 25 25 38 50 65
Rated making capacity Icm
50/60Hz (kA peak) 380/415/500V 77 77 52.5 77 105 105 143
Rated impulse withstand voltage of main circuit (kV), Uimp 8 8 8 8 8 8 8
Rated impulse withstand voltage of aux. circuit (kV), Uimp 4 4 4 4 4 4 4
Typical opening time msec 4040404040 4040
Typical closing time msec 6060606060 6060
Utilization category B B B B B B B
Suitability for isolation ü ü ü ü ü ü ü
�ixed ü ü ü ü ü▲
Versions
Dimensions(mm)
1/2
TECHNICAL DATA
Drawout ü ü ü
Manual ü ü ü ü ü ü ü
Electrical ü ü
CT taps for Thermo-Magnetic (DN1), Solid State (SR15, SR15G) Releases Amps 320,400 400,500,630 400,500,640,800
CT taps for Microprocessor based (SR21, SR21E & SR61C) Releases Amps --- --- --- --- 800
Electrical & Mechanical life (Operating Cycles)** 15,000 15,000 15,000 20,000 20,000 20,000
Fixed D
H 385 385 385 385 394
3 pole 331.2 331.2 331.2 331.2
378
H
W
4 pole NA NA NA NA
NA
466
NA
D 447 447 447 447 431
Drawout
D
H 468 468 468
H
W
3pole
4 pole
NA
399
NA
399
487
399
487
D 587 587 587
NA - Not Available
* Please consult us for applications at higher operational voltages upto 1000V and dc voltages.
** Electrical life = Mechanical life, however arcing contacts need to be replaced depending upon wear.
Arcing contacts are readily available as spares & easily replaceable at site.
▲ Available in CN-CS version also.
Note:1) CN-CS400, CN-CS630, 630E, 800E & 1000E ACB are available only with DN1 release.
2) A Choice of straight horizontal rear, straight vertical rear, flat rear and front terminal orientations in all drawout ACBs.
3) Data of Icw rating for 3 sec is available on request.