JM1LE Series Residual Current Circuit Breaker with Overcurrent Protection

JM1LE series residual current circuit breakers (hereinafter referred to as RCBOs) are mainly suitable for distribution networks with AC 50Hz, rated voltage AC400V, and insulation voltage up to 800V. They are used to provide indirect contact protection for  people,  prevent fire hazards caused by equipment insulation damage and ground fault  currents,  and can be used to distribute electrical energy and protect circuits and power  equipment from overload and short circuits, It can also be used for infrequent switching of circuits and infrequent starting of motors. The working power supply of the conventional leakage protection module with RCBO is sampled as two phases. This series of RCBOs is 3 phase. If any phase is missing, the leakage protection module of the RCBO can still work normally. The rated residual operating current In and maximum disconnection time can be  adjusted on-site according to actual conditions: When the phase voltage drops to 50V, the   leakage protection module can still operate normally and has a leakage alarm output function. 

The product meets the standards of IEC60947 and GB14048. 2

•  Applicable Working Conditions & Basic Parameters

It is suitable for power distribution circuits with AC 50Hz frequency and rated voltage of AC 400V, with an insulation voltage up to 800V for wide application. It can be used for power distribution, infrequent circuit switching and infrequent starting of motors.

• Multiple Protection Functions

Personal protection: Prevent electric shock hazards caused by indirect contact.

Fire prevention: Avoid fire risks resulting from equipment insulation damage and earth fault current.

Electrical protection: Protect circuits and power equipment against overload and short-circuit faults.

• Core Advantages of Residual Current Module

Optimized power supply mode: Adopts three-phase power supply, different from the conventional two-phase sampling power supply.

Anti-phase-loss capability: The residual current protection module can operate normally in case of any phase loss.

Excellent low-voltage resistance: The residual current function remains normal at a phase voltage as low as 50V, with residual current alarm output.

On-site adjustable parameters: The rated residual operating current and maximum breaking time can be adjusted on site as required.