NS series molded case circuit breakerDetailed product description：

Scope of application
The NS series plastic shell circuit breaker (hereinafter referred to as the circuit breaker) is a new product developed by our company. Its design embodies the latest current limiting principle and manufacturing technology, and has the characteristics of compact structure, full modularity, high breaking capacity, and zero arcing. Its rated insulation voltage is 750V, suitable for infrequent conversion and motor starting in circuits with AC 50Hz, rated working voltage of 690V and below, and rated working current up to 630A. Circuit breakers have overload, short circuit, and undervoltage protection devices, which can protect the circuit and power equipment from damage.
1.2 Circuit breakers are classified into N-type (standard type), H-type (higher breaking type), and L-type (current limiting type) according to their rated ultimate short-circuit breaking capacity (Icu).
1.3 This circuit breaker can be installed vertically (i.e. vertically) or horizontally (i.e. horizontally). It cannot be reversed and can only be connected to power lines 1, 3, and 5, and load lines 2, 4, and 6.
1.4 This circuit breaker shall comply with the following standards:
IEC60947-1 and GB/T14048.1 General Principles, IEC60947-2 and GB/14048.2 Low Voltage Circuit Breakers, IEC60947-4 and GB/14048.4 Contactors and Motor Starters, IEC60947-5.1 and GB/T14048.5 Electromechanical Control Circuit Electrical Appliances.

4、 Protection features

Overcurrent protection characteristics of thermoelectric magnetic release
The protection characteristics of circuit breakers for distribution protection are shown in Table 2

Rated current In (A)	Long delay action characteristics (ambient temperature+40 ℃)		Instantaneous action characteristic
	1.05In (cold state) inactive time	1.30In (hot state action time)
In≤0.03	≥1h	＜1h	10In±20%
In＞63	≥2h	＜2h	10In±20%

The protection characteristics of circuit breakers for distribution protection are shown in Table 3

Rated current In (A)	Long delay action characteristics (ambient temperature+40 ℃)				Instantaneous action characteristic
	1.10In (cold state) inactive time	1.2In (hot state action time)	1.5In (hot state action time)	7.2In (cold state) action time
In≤400	≥2h	＜2h	4min	4S＜T≤10S	12In±20%

The overcurrent protection characteristics of the intelligent release are shown in Table 4

Long delay action characteristic Im=(0.4~1) Ir adjustable			Short delay action characteristic Im=(2~10) Ir adjustable	Instantaneous action characteristic
1.15Ir action time	6Ir action time	7.2Ir action time	Action Time
120～180S	5～7.5S	3.5～5S	≤60ms	≥11In±20%

5、 Main technical parameters of circuit breaker

model	Rated current (A)	polar number	Rated insulation voltage (V)	Rated working voltage (V)	Flying arc distance (mm)	Extreme short-circuit breaking (KA)	Short circuit breaking capacity of action (KA)	Operational performance lifespan (times)
								energize	no power
NS-100D	12.5,16,20 25,32,40,50 63,80,100	3、 Quadrupole	nine hundred and fifty	690 and below	0	eighteen	eighteen	one thousand and five hundred	eight thousand and five hundred
NS100N						twenty-five	twenty-five
NS100H						seventy	seventy
NS160D	16,20,25,32 40,50,63,80 100,125,160					twenty-five	twenty-eight	one thousand	seven thousand
NS-160N						thirty-six	thirty-six
NS-160H						seventy	seventy
NS-250D	160,180 200,225,250					twenty-five	twenty-five	one thousand	seven thousand
NS-250N						thirty-six	thirty-six
NS-250H						seventy	seventy
NS-400D	200,225 250,300 315,400					thirty-five	thirty-five	one thousand	four thousand
NS-400N						forty-five	forty-five
NS-400H						seventy	seventy
NS-630D	315,350 400,500 600,630					thirty-five	thirty-five	one thousand	four thousand
NS-630N						forty-five	forty-five
NS-630H						seventy	seventy

6、 Dimensions and installation dimensions of circuit breakers
6.1 NS-100、 The external dimensions and installation dimensions of 160 and 250 (X-X and Y-Y are the central axes of the circuit breaker) are shown in Figure 1
6.2 NS-400、 The external dimensions and installation dimensions of 630 (X-X, Y-Y are the central axes of the circuit breaker) are shown in Figure 2