Overview

The HYM3L series earth leakage circuit breakers (hereinafter referred to as “circuit breakers”) are developed with global leading technology, offering reliable performance, powerful technical features, easy maintenance, sleek design, and small size.

The circuit breakers are suitable for use in electrical systems of AC 50Hz/60Hz, with the rated voltage of up to 415V and rated current of up to 630A, to distribute electrical energy, prevent the electrical systems from hazards due to overload, short-circuit and other faults, and control infrequent motor operations.

The circuit breakers offer leakage (residual current) protection to provide indirect contact protection against fatal electric shock, and prevent electrical fires caused by long standing ground fault currents that cannot be detected by over-current protectors. The circuit breakers can also be used to provide direct contact protection when the

concerned protector fails, with the rated residual operating current set to 30mA (for non-delay type). Be noted that the circuit breakers do not offer protection against electric shock due to simultaneous contact of two load conductors (two phase wires, or any phase wire and neutral wire).

Both the residual operating current ratings and protection actuation time are adjustable, achieving selectivity protection in the event of residual currents. Two DC component types are available, including Type AC - CBR that ensures tripping caused by residual sinusoidal current with no DC component, whether it is suddenly applied or slowly rising, and Type A - CBR that ensures tripping caused by residual sinusoidal current and residual pulsating DC (with/without specified superimposed DC component), whether it is suddenly applied or

slowly rising.

The circuit breakers comply with IEC 60947-2, GB/T 14048.2, IEC 755 and GB/T 6829.

Normal working conditions

1. Applicable temperature: Ambient air temperature: -5℃ to +40℃, with the average temperature not exceeding +35℃ within 24 hours; Note: The operating ambient temperature can be extended to -35℃∽+70℃. When -5℃∽+40 is exceeded, follow the instructions or data specified in the product catalogue, or consult the manufacturer;  

2. Altitude: ≤2,000m for mounting site (please consult with the manufacturer when above 2,000m);

3. Atmospheric conditions: Air relative humidity: ≤ 50% at the maximum temperature of +40℃, and a higher relative humidity is allowed when at a lower temperature; in the wettest month, the average maximum relative humidity is up to 90% and the average minimum temperature is up to +25℃, taking into account the condensation on product surface due to temperature changes;
4. Pollution level: Level 3;

5. Mounting type: III for main circuit;

6.Mounting conditions: In places with no significant shaking, impulse and vibration; In a medium with no explosive hazards, containing no gas and dust (including conductive dust) sufficient enough to corrode metals and damage insulation; And in places with no rain/snow impact; The inclination angle between the mounting and vertical surfaces should not exceed 5°;

7. The external magnetic field close to the mounting site should not exceed 5 times the geomagnetic field in any direction;

8. Storage and transportation conditions: Storage and transportation conditions:  Temperature range: -35℃to +70℃, with the relative humidity not exceeding 90%; During transportation, handle with care, no upside down, and avoid severe collisions.

9. Protection degree: IP30 (wiring terminals excluded)

10. Residual current type: Type AC residual current circuit breaker ; Type A residual current circuit breaker .