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¡¤Application
NS series moulded case circuit breaker is one of breaker which adopts international advanced design, manufacture technology to develop. The rated insulating voltage is 750V, suitable for AC 50Hz(60Hz),rated working voltage 690V or below, rated working current is 12.5A to1250A of circuit and used in distributing electric energy, and non-frequent breaking in the normal conditions , protecting the current& equipment from overload& under voltage, circuit breaker with rated frame current 400A or below,can be used in mousecage motor¡¯s non-frequent start,breaking during working, protecting motor from overload, short circuit& undervoltage,the product conforms to IEC60947-2 standard.

Type Pole number Rated insulating voltage(V) Rated operating voltage(V) Rated ultimate short circuit breaking capacity Icu (KA) at 380/415V Rated servies short circuit breaking capacity Ics at 380/415V(KA) Operation performance Utilization category
ON OFF
NS-100N 3, 4pole 750 690 and below 25 25 1500 8500 A
NS-100H 70 70
NS-100L 150 150
NS-160N 36 36 1000 7000
NS-160H 70 70
NS-160L 150 150
NS-250N 36 36 1000 7000
NS-250H 70 70
NS-250L 150 150
NS-400N 45 45 1000 4000
NS-400H 70 70
NS-400L 150 150
NS-630N 45 45 1000 4000
NS-630H 70 70
NS-630L 150 150
NS-1250N 3 pole 50 37.5 1000 4000
NS-1600N 50 37.5

¡¤Main Technical Parameter
Note:1. The N-pole breaker has no protection which closing and opening with the other three poles. 2. The type of thermal magnetic for NS-400/630 has no four poles.
Type Rated currentIn(A) Note
NS-100 12.5,16,20,25,32,40,50,63,80,100 Tadjustable (0.8~1In)M adjustable (5~10In)
NS-160 16,20,25,32,40,50,63,80,100,125,160
NS-250 160,180,200,225,250
NS-400 315,350,400
NS-630 400,500,630
NS-1250 800,1000,1250 Tadjustable (0.8~1In)M fixed

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