Overview

The HUW1 Series Universal Circuit Breaker (hereinafter referred to as “circuit breaker”) is suitable for distribution networks with AC 50 Hz, rated working voltage of 690 V and rated current up to 6,300 A, and is mainly used for power distribution, power feeding and power generation protection, to protect lines and power equipment from faults such as overload, undervoltage, overvoltage, current voltage imbalance, short circuit and grounding fault. The core components of circuit breakers adopt intelligent controllers, which can realize accurate selective protection, to avoid unnecessary power failure and enhance the reliability, continuity and safety of the power supply.

The product complies with GB14048.2 and IEC/EN60947-2.

Normal working and installation conditions

1. Ambient air temperature -5°C ~ +40°C (-40°C ~ +70°C for HUW1F and HUW1PVA). The average temperature within 24 hours shall not exceed +35°C. 

2. Altitude: The altitude of the installation location shall not exceed 2,000 meters. 

3. Atmospheric conditions: The relative atmospheric humidity does not exceed 50% when the maximum temperature is +40°C, and a higher relative humidity is allowed at a lower temperature. For example: The humidity is 90% at 20°C, and special measures shall be taken for occasional condensation due to the temperature change. 

4. Contamination grade: Grade 3. 

5. Installation category: The installation category of the main circuit breaker, undervoltage trip coil and primary coil of the power transformer is IV, and the other auxiliary circuits and control circuits are III. 

6. Use category: Class B. 

7. Installation conditions: The circuit breaker shall be installed according to the requirements of this manual. The circuit breaker shall be installed smoothly without additional mechanical stress, so as to avoid damage to the circuit breaker or poor contact of the main bus.