AIR CIRCUIT BREAKERS - Electrical and Electronics Division

3
3/11
Conformance to IS 13947 (Part 3) and IEC:60947-3
Type Designation �N315 �N400 �N630
No. of poles 3+Neutral 3+Neutral 3+Neutral
Neutral Isolable Isolable Isolable
Service temperature °C -20 to 50 -20 to 50 -20 to 50
Rated operational voltage (Ue) V 415 415 415
Rated insulation voltage (Ui) V 690 690 690
Rated impulse withstand voltage(Uimp) kV 888
Rated frequency Hz 50-60 50-60 50-60
Conventional Enclosed thermal current at 40°C A 315 400 630
Rated operational current Ie A
AC 20A utilization category 315 400 630
AC-21A utilization category 315 400 630
AC-22A utilization category 315 400 630
AC-23A utilization category 315 400 630
DC rating at 220V DC 315 400 630
No.of poles in series,utilization category
TECHNICAL DATA
SWITCH DISCONNECTOR �USE �OR BS TYPE �USES
at rated current 2,DC22A 2,DC22A 2,DC22A
Rated making capacity (436V, cosØ-0.35) A 3150 4000 6300
Rated breaking capacity (436V, cosØ-0.35) A 2520 3200 5040
Rated fused short circuit current kA 80 80 80
with L&T fuses rating,A /Type Size 315,HQ,B4 400,HQ,B4 630,HQ,C2
Capacitor duty - 415 V 50-60Hz kVAR 145 175 270
Mechanical life (operating cycles) 10000 10000 10000
Terminal capacity (main) mm 2 400 2x400 2x625
Terminal capacity (neutral) mm 2 120 240 400
Terminal screw mm M10x30 M12x40 M16x50