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Home  >> Products >> Low Voltage >> Moulded Case Circuit Breaker >> SM4 Series Moulded Case Circuit Breakers
     
   
 
1. Application
 
SM4 series MCCB is applicable circuit of AC 50/60Hz, rated current up to 400A, for distribute energy of electricity & infrequent making & breaking circuit in normal conditions. The products conforms to IEC60947-2.

 
2. Specification
Type SM4-125 SM4-160 SM4-250 SM4-400
Poles number
3 3 3 3
Rated current In(A)
25~125 25~160 125~250 125~400
Rated working voltage Ue(V) (50/60Hz)
500 500 600 600
Rated working voltage Ue (V)
 250 250 250 250
Rated insulation voltage Ui~(V)
500 500 690 690
Rated impulse voltage Uimp(kV)
6 6 8 8
Utilisation category
 A A A A
Rated limited short-circuit breaking capacity Icu(kA)
230/240V~
22 50 60 70
400/415V~
16 36 36 40
440V~
10 20 30 36
480/500V~
8 14 25 30
600V~
- - 20 -
690V~
- - 16 -
250V~
 16 - 36 -
Rated short-circuit breaking service capacity Ics(%Icu)
100 100 100 100
Mechanical life
7000 7000 7000 5000
Electrical life
1000 100 1000 800
 
 
3. Outline and Installation Dimension
 
SM4-125
 
 
SM4-250

 

 
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