Sieno Moulded case circuit breaker NS series

Application:

NS moulded case circuit breaker(MCCBs) is one of the most advanced type 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 complies with IEC60947-2.
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	12In±20%

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