Overview
The H8ML Series Earth Leakage Circuit Breaker (hereinafter referred to as “circuit breaker”) is a new product successfully developed by our company with international advanced technology. This product is characterized by perfect protection, reliable performance, high technical specification, beautiful appearance and small size, which is an ideal product for upgrading old products.
This circuit breaker is suitable for the power system with AC 50 Hz, rated voltage of 400 V, and rated current up to 630 A. It is used to distribute electric energy, protect the power system from overload, short circuit and other faults, and control the infrequent operation of the motor.
The earth leakage (residual current) protection function of the circuit breaker is to provide indirect contact protection for personal electric shock with fatal danger, and also to prevent electrical fire caused by long-standing grounding fault current that cannot be detected by the overcurrent protection device.
The rated value of the residual operating current of the circuit breaker as well as the operating time of the H8MLY leakage protection can be adjusted. Therefore, selective protection during earth leakage can be realized in the power distribution system.
When the rated residual operating current is set to 30 mA (for the non-delay circuit breaker) and the relevant protection device fails, the circuit breaker can also be used as a direct contact protection device.
This product complies with GB 14048.2, IEC 60947-2, IEC 755 and GB/Z 6829.
Normal working conditions
1. The ambient air temperature shall not be higher than +40°C or lower than -5°C.
2. Altitude ≤ 2,000 m.
3. The relative air humidity shall not exceed 50% at the maximum temperature of +40°C. A higher relative humidity is allowed at a lower temperature. The average minimum temperature of the wettest month shall not exceed +25°C, and the average maximum relative humidity of that month shall not exceed 90%.
4. Contamination grade: Grade 3. There is no explosion danger and no gas or conductive dust that corrodes metals or damages insulation in the surrounding air.
5. The installation category is Grade III.
6. The "1, 3, 5 and N1" terminals of the circuit breaker are connected to the power supply, and the "2, 4, 6 and N2" terminals are connected to the load, which cannot be reversed.
7 The magnetic field near the installation site shall not exceed 5 times of the geomagnetic field in any direction.
8. The installation surface of the circuit breaker shall be vertical to the horizontal plane. The circuit breaker is basically installed vertically, with the power supply end at the top and the load end at the bottom, and can also be installed horizontally.
