Details

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Description                     

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 to 1250A 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.

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Technical parameter                      

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	Operation performance		Utilization category
						ON	OFF
NS-630N	3, 4 pole	750	690 and below	45	45	1000	4000	A
NS-630H				70	70
NS-630L				150	150

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.

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Trip units main technical parameter.                       

Type	Rated current In (A)	Note
NS-100	12.5,16,20,25,32,40,50,63,80,100	T adjustable (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

 

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Electronic release.                        

Type	Rated current In (A)	Note
NS-400	400	Ir=0.4....1* In(adjustable 48 setting) Tripping between 1.05....1.3* Ir (IEC60947-2) (Long-time overload protection) Im=2-3-4-5-6-7-8-10 * Ir (Short-circuit protection)
NS-630	630

1. Overload protection with adjustable threshold, as defined by IEC60947-2
2. Short-circuit protection with adjustable threshold
3. Instantaneous short-circuit protection
4. Earth fault protection with adjustable threshold
5. Load indication : light at 90% of Ir setting threshold; Flashing more than Ir setting threshold
6. Fault indication
LEDs indicates the type of fault that caused tripping;
Overload (LT protection) or abnormal component temperature (>Ir);
Short-circuit (ST or instantaneous protection)( >Im);
Earth fault (if earth fault protection option is present)(Ig);
Microprocessor malfunction (both (>Ir) and ( >Im) LEDs go on ,plus the (Ig) LEDs if earth fault protection option is present ).
Battery powered. Spare battery are supplied in an adapter box. When a fault occurs , the LED indicating the type of fault ,lights for about 10 minutes . The information is however stored in memory . The LED can be illuminated by pressing the test push button. The LED automatically goes off and the memory is cleared when the circuit breaker is reset .

 

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Dimension