NS Moulded Case Circuit Breaker / MCCB Circuit Breaker
1. Application:
1. Application:
NS moulded case circuit breaker (MCCB) is one of the most advanced breakers in the world, which adopts international advanced design and manufacture technology. They are suitable for short circuit and overload protection for circuit of AC 690V 50/60Hz, rated current from 12.5A to 630A. Its rated insulation voltage is 690V. It can make and break the non-frequently circuit in the normal conditions. It takes protect effect when mouse cage motors non-frequent start, breaking off working and protecting overload, short circuit and lacking voltage. It obeys IEC60947-2.
2. Tripping Characteristics:
|
Rated current of release (A)
|
Thermodynamic release (ambient temp+40℃)
|
Operational current
of magnetic release (A) |
|
|
1.05In (cold state) inoperative time (h)
|
1.30In (heat state) inoperative time (h)
|
||
|
In≤ 63
|
≥ 1
|
< 1
|
10In± 10%
|
|
63 < In≤ 100
|
≥ 2
|
< 2
|
10In± 20%
|
|
100 < In≤ 630
|
≥ 2
|
< 2
|
5-10In± 20%
|
|
5-10In± 20%
|
Thermodynamic release (ambient temp+40℃)
|
Operational current
of magnetic release (A) |
|||
|
1.0In
(cold state) inoperative time |
1.20In
(heat state) operative time |
1.50In
(heat state) operative time |
7.2In (heat state) operative time
|
||
|
12.5≤ In≤ 400
|
≥ 2h
|
< 2h
|
≤ 4min
|
2S< TP≤ 10S< DIV>
|
12In± 20%
|
3. Specifications:
|
Type
|
Rated current
(A) |
Poles
|
Rated insulation voltage (V)
|
Rated operating voltage
(V) |
Arcing over distance (mm)
|
Ultimate short circuit breaking capacity
|
Servies short circuit breaking capacity
|
Operating performance (times)
|
||
|
ON
|
OFF
|
|||||||||
|
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-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-250D
|
160,180,200,
225,250 |
25
|
25
|
1000
|
7000
|
|||||
|
NS-250N
|
36
|
36
|
||||||||
|
NS-250H
|
70
|
70
|
||||||||
|
NS-400D
|
200,225,250,
300,315,400 |
35
|
35
|
1000
|
4000
|
|||||
|
NS-400N
|
45
|
45
|
||||||||
|
NS-400H
|
70
|
70
|
||||||||
|
NS-630D
|
315,350,
400,500,600, 630 |
35
|
35
|
1000
|
4000
|
|||||
|
NS-630N
|
45
|
45
|
||||||||
|
NS-630H
|
70
|
70
|
||||||||
Do remember to contact us with any problem about our MCCB Circuit Breaker.