JEM1(CM1) series of moulded case circuit breaker

Application

JEM1(CM1) series of moulded case circuit breaker is one of our new type products developed and manufactured by adopting international advanced technology. It is supplied with rated insulating voltage 660V and used for circuit of A.C.50Hz, rated operating voltage AC 380V(or below), rated operating current up to 1250A for infrequent over and starting of the motors. Equipment with the protection devices for over current, short circuit and undervoltage, the products are capable of preventing damage of circuits and supply units.The products conforms to GB14048.2,IEC60497-2 standards.

Type and meanings

Note:* No code for sistribution breakers; "2" represents motor protection circuit breakers
*No code for direct handle operation;"P" represents electrical operation ,and "Z" represents rotary-operated handles.
*Rated breaking capacity grade of MCCB, C-economical type,with current trip-release on N pole which closing and opening with the other three poles; L-standand type, M-middle high breaking capacity type, H-high breaking capacity type.

Classificatipn of MCCB
According to product poles,two kinds of three-pole and four pole are provided. The neutral pole (N pole) of four pole four pole has four types:
Type A: No current trip-release on N pole which making all the time ;not closing and opening with the other three poles
Type B: No current trip-release on N pole which closing with the other three poles.
Type C: With current trip-release on N pole which and opening with the other three poles Ypee D: With current trip-release on N pole which making all the time ;not closing and opening with the other tree poles.

Main technical Specifications

Protection characteristic

Working environment
1. Altitude 2000m.
2. Ambient temperature:-5~+40.
3. Resistance to moisture.
4. Resistance to salt spary and oil spary
5. Resistance to mould.
6. Resistance to nuclear radiation.
7. Maximum salant:22.5.
8. Reliable work under earthquake condition(4g).
9. Ambient environment freeing from explosive danger and air or dust which
may cause corrosion of metal or weakness of insulation.
10.Ambient environment freeing from erosion of rain or snow.

Outline and installation dimensions

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