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 Products >> LOW VOLTAGE PRODUCTS >> MOULDED CASE BREAKER >> MSM8 Series Moulded Case Circuit Breakers
MSM8 Series Moulded Case Circuit Breakers
    Product details

MSM8 Series Moulded Case Circuit Breakers

MSM8-160N

MSM8-250N

Product Features:

MSM8 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 conforMSM 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

MSM8-160D

16,20,25,32,
40,50,63,80,
100,125,160

3P

4P

690

380V/415V

100

25

25

4500

10000

MSM8-160N

30

30

MSM8-160H

70

70

MSM8-160L

100

100

MSM8-250N

200,225,250

35

35

MSM8-250H

70

70

MSM8-250L

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

10In20%

63<In=100

=2

< 2

10In20%
5In20%

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

12In20%

 

Outline and installation dimensions



 


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