NB-NS Moulded Case Circuit Breaker

Short Description:

NB-NS series MCCB is development from Merlin Gerin type, the rated insulating voltage is 750V,suitable for AC50HZ/60H乙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 motor’s non-frequent start, breaking during working, protecting motor from overload, short circuit & under-voltage, the product conforms to IEC60947-2 standard.


Product Detail

Product Tags

K SPECIFICATION

Type

Pole No.

Rated insulating voltage (V)

Rated operating voltage (V)

Ultimate short circuit breaking capacity lcu(KA) at 380/415V

Services short circuit breaking capacity les at 380/415V (KA)

Operating performace

Utiliza-tim Category

ON

OFF
NB-NS-100N      

25

25

     
NB-NS-100H      

70

70

1500 8500  
NB-NS-100L      

150

150

     
NB-NS-160N      

36

36

     
NB-NS-160H      

70

70

1000 7000  
NB-NS-160L      

150

150

     
NB-NS-250N 3,4    

36

36

     
NB-NS-250H Pole    

70

70

1000 7000  
NB-NS-250L  

750

690 and below

150

150

   

A

NB-NS-400N      

45

45

     
NB-NS-400H      

70

70

1000 4000  
NB-NS-400L      

150

150

     
NB-NS-630N      

45

45

     
NB-NS-630H      

70

70

1000 4000  
NB-NS-630L      

150

450

     
NB-NS-1250N 3 pole    

50

37.5

     
NB-NS-1600N    

50

37.5

1000 4000  

NOTES

1.The N-pole breaker has no protection which closing and opening with the other three poles.
2.The type of thermal magnetic for FW-NS-400/630 has no four poles.

Thermal magnetic release

45.1

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