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 , Moulded case breaker >> HM8

HM8 Series Moulded Case Circuit Breakers

HM8-160N
HM8-250N
Product Features:
HM8 series MCCB is one of our new products developed and manufactured by adopting international advanced technology. It is supplied with rated insutaling voltage 690V and used for circuit of A.C.50/60Hz, rated operating voltage A.C. 415V or below, rated operating current from 16A to 250A. It is designed for protection of electric circuit, motors, transformers and other equipments. The products conforms to GB14048.4, IEC60947-1, IEC60947-2 & VDE0660 standards.
Type and meanings
Main technical Specifications:
Type
Rated Cureent(A)
Pole No.
Rated insulating voltage(V)
Rated
Opreating Voltage(V)
Arcing Over Distance(mm)
Ultimate Short
Circuit Breaking Capacity(KA)
Servies Short
Circuit Breaking Capacity(KA)
Operation performance
ON
OFF
HM8-160D
16,20,25,32,
40,50,63,80,
100,125,160

3P

4P

690
380V/415V
100
25
25
4500
10000
HM8-160N
30
30
HM8-160H
70
70
HM8-160L
100
100
HM8-250N
200,225,250
35
35
HM8-250H
70
70
HM8-250L
100
100
4000
8000

Motion characteristic:
The thermodynamic release of a circuit breaker provides the feature of inverse time-delay, while the magnetic release is the instantaneous operation as shown on table 2(distribution circuit breaker) and table 3 (motor protection circuit breakers).
Table2
Rated current of release(A)

Thermodynamic Release
(ambient templand +40? marine +45?)

Operational current of
magnetic release(A)
1.05In(cold state)
inoperative time(h)
1.30In(heat state)
operative time(h)
In+63
−1
< 1
10In\20%
63<In+100
−2
< 2
10In\20%
5In\20%
100<In+630
−2
< 2
Table3
Rated current of release(A)

Thermodynamic Release
(ambient templand +40 marine +45 )

Operational current of
magnetic release(A)
1.0In(cold state)
inoperative time(h)
1.20In(heat state)
operative time(h)
1.50In(heat state)
operative time(h)
7.2In(cold state)
operative time(h)
12.5<In+400
−2
< 2
+ 4min
2s<Tp+10s
12In\20%
Outline and installation dimensions





 

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