Overview

The HYM3 Series Molded Case Circuit Breaker (hereinafter referred to as “circuit breaker”) is a new type of circuit breaker designed and developed by our company with comprehensive international advanced technology. The product is characterized by advanced design, reliable performance, high technical indicators, convenient maintenance, desirable appearance and small size.

The circuit breaker has the rated isolation voltage of 1000 V (800 V for HYM3-125), which is suitable for the distribution network with AC 50/60 Hz, and rated working current up to 630 A. It is used to distribute electric energy and as overload, short-circuit and undervoltage protection of lines and power supply equipment, as well as infrequent switching of lines and infrequent starting and overload, short-circuit and undervoltage protection of motors.

Such circuit breakers can be divided into C-type (basic type), S-type (standard type) and H-type (high breaking type) according to their rated ultimate short circuit breaking capacity (Icu). 

This product complies with the requirements of GB/T 14048.2、IEC 60947-2.

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℃ -5℃ or +40℃ +70℃. Please follow the instructions or data specified in the product catalogue and instruction manual, 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 90% and the average minimum temperature is +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. Protection degree: IP30 (wiring terminals excluded) 

7. 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; 

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