AIR CIRCUIT BREAKERS - Electrical and Electronics Division

Conformance to IS 13947 (Part 3) and IEC:60947-3
Type Designation �N400 �N630 �N800
No. of poles 3+Neutral 3+Neutral 3+Neutral
Neutral Isolable Isolable Isolable
Service temperature °C -20 to 50 -20 to 50 -20 to50
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 400 630 800
Rated operational current Ie A
AC 20A utilization category 400 630 800
AC-21A utilization category 400 630 800
AC-22A utilization category 400 630 800
AC-23A utilization category 400 630 800
DC rating at 220V DC 400 630 800
No.of poles in series,utilization category
at rated current 2,DC22A 2,DC22A 2,DC22B
Rated making capacity (436V, cosØ-0.35) A 4000 6300 8000
Rated breaking capacity (436V, cosØ-0.35) A 3200 5040 6400
Rated fused short circuit current kA 100 100 50
with L&T fuses rating,A /Type Size 400/HN2 630/HN3 800/HN3
Capacitor duty - 415 V 50-60Hz kVAR 175 270 270
Mechanical life (operating cycles) 10000 10000 3000
Terminal capacity (main) mm 2 2x400 2x625 2X625
Terminal capacity (neutral) mm 2 240 400 400
Terminal screw mm M12x40 M16x50 M16X50
Details of fuses available
TECHNICAL DATA
SWITCH DISCONNECTOR �USE �OR DIN TYPE �USES
L&T Type designation HN HN HN
Size 2 3 3
Rating of L&T fuses available 200-400 315-630 315-800
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