Overview

The HYW3 Series Intelligent Universal Circuit Breaker (hereinafter referred to as “the circuit breaker”) is suitable for distribution networks with AC 50/60 Hz, rated working voltage up to 690 V and rated current below 6,300 A. The circuit breaker is mainly used for distribution, feeding and power generation protection to protect circuits and power supplies from HHH load, undervoltage, overvoltage, imbalance of current and voltage, short circuit and grounding. The circuit breaker can also be directly used for overload, undervoltage and short-circuit protection of motors and generators. The core component of the circuit breaker adopts the intelligent controller, which has accurate selective protection, so as to avoid unnecessary power failure and improve the reliability, continuity and safety of power supply. The circuit breaker is also equipped with an open communication interface to realize telemetering, telesignaling, telecontrol and teleregulation, thus meeting the requirements of the control center and automation system.

The circuit breaker complies with GB/T 14048.2 and IEC 60947-2.

Normal working and installation conditions

1. Ambient air temperature: It is suitable for ambient temperature of -5°C–+40°C, -40°C–+70°C (Mic1.0 standard) and -25°C–+70°C (Mic2.0 multifunctional and Mic5.0 intelligent).

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 themaximum 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 breaker’s main circuit, undervoltage release’s 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.