CMGM1L/JL series residual current operated moulded case circuit breaker, is used as non-frequent transformation on the circuit of AC 50Hz, rated operating voltage 400V, and rated operating current up to 630A(800A), and also used as generator’s non-frequent starting. The breaker has overload, short circuit and under-voltage protection device to protect the line and power equipment from
being damaged. Meanwhile, it can provide the personal protection of the indirect contact, also can protection device for the fire danger which caused the earth fault and cannot detected by the over current protection. When the other protect device failed, rated residual can have the additional protection directly for the CMGM1L residual circuit breaker which current is 30mA.
CAccording to the rated limit short circuit breaking capacity, it has M type (higher breaking type) and H type (high breaking quadrupole without H type) .
CThe characteristics of this series products is small size, high breaking capacity, short flashover, and anti-vibration.
CThe circuit breaker can be installed in vertical, also can be installed in horizontal
CThe circuit breaker has the isolation function, the symbol is “ ”
CThe circuit breaker comply the standard IEC60947-2 and GB14048.2 and the appendix B which have the residual current protection circuit breaker.
Cthe circuit cannot connect the line inversely, only can connect the power line to 1,3,5 and connect the load line to 2,4,6

 Altitude: ≤2000m

Ambient temperature: -5℃ ~ +40℃;
Able to withstand the influence of damp air
Able to withstand the influence of salt fog and oil fog;
The biggest inclination is 22.5°
Where there is no explosive hazard in the medium and where there is no gas or
conductive dust that is enough to corrode metal and destroy insulation in the medium
Where there is no rain and snow invasion

 Three-phase residual current protection: CMGM1L/J circuit breaker has the earth failure 

protection, the general leakage protection module operating power of the residual current
protection circuit breaker is two-phase, this series circuit breaker is three-phase, without
any of the phase, the leakage protection module of the circuit breaker can continue the
work normally;
Adjustable on site: rated residual operating current I n;
Low voltage protection: when the voltage drop to 50V, the leakage protection module can
continue the work normally;
Leakage alarm output function: when residual current of the device or circuit reach or
exceed the set value, the circuit breaker which with the leakage alarm unit module can
output an independent contact signal, then drive the corresponding alarm device.
Installation are interchangeable: The size and installation dimensions are same with the
CMGM1L/J which have the same specification (CMGM1L/J-630 is same with CMGM1L/J
-800), the installation are interchangeable.

CEMIG is one of a company of low voltage smart electrical and global operation, but also a firm advocated of environmental protection appliances. With 10 years of professional experience in low-voltage electrical research and development, production, provide products and solutions aimed on green energy and smart power. Now, it has many branches, a manufacturing industrial park, a R&D center. The distribution channels around the country make the company to better grasp the pulse of the market, well understand the local information, more quickly and efficiently meet customer demand.