NS series moulded case circuit breaker is one of the most advanced type breakers in the world, which adopt international advanced design and manufacture fechnology. They are suitable for short circuit and overload protection for circuit of AC 690V 50/60Hz, rated current from 12.5A to 630A. It takes protect effect when mouse cage motors non-frequent start, breaking off working and protecting overload, short circuit and lacking voltage.
Tripping Characteristics of MCCB
Rated Current of Release(A) Thermodynamic Release (ambient temp +40C) Operational Current of Magnetic Release(A)
1.05In(cold state) inoperative time(h) 1.30In(heat state) operative time(h)
In≤ 63 ≥ 1 <1 10In+20%
63 ≥ 2 <2 10In +20%
100 ≥ 2 <2 5-10In+20%

Rated Current of Release(A) Thermodynamic Release (ambient temp +40C) Operational Current of
Magnetic
Release(A)
1.0In(cold state)operative time(h) 1.20In(heat state)operative time(h) 1.50In(heat state)operative time(h) 1.01In(heat state)operative time(h)
12.5≤ In≤ 400 ≥ 2 <2 ≤ 4min S 12In+20%

Main Technical Specifications
Type Rated Current (A) Poles Rated Insulating Voltage(A) Rated Operating Voltage (A) Acting Over Distance (mm) Ultimate short circuit Breaker Capacity Servies Short Circuit Breaker Capacity Operating performance(times)

NS-100D 12.5,
16,
20,
25,
32
, 40,
50,
63,
80,
100 3, 4 950 690 0 18 18 1500 8500
NS-100N 25 25
NS-100H 70 70
NS-100L 150 150
NS-160D 16,
20,
25,
32,
40,
50,
63,
80,
100,
125,
160 25 25 1500 7000
NS-160N 36 36
NS-160H 70 70
NS-160L 150 150
NS-250D 160, 180,
200, 225,
250 25 25 1000 7000
NS-250N 36 36
NS-250H 70 70
NS-250L 150 150
NS-400D 200,
225,
250,
300,
315,
400 35 35 1000 4000
NS-400N 45 45
NS-400H 70 70
NS-400L 150 150
NS-630D 315,
350,
400,
500,
600,
630 35 35 1000 4000
NS-630N 45 45
NS-630H 70 70
NS-630L 150 150