Overview

The HUM18-125 series miniature circuit breakers (hereinafter referred to as “circuit breakers”) are mainly used in power facilities and electrical equipment circuit with AC 50Hz, rated voltage 230V/400V, rated current 125A for overcurrent protection, and it can be also used for infrequent on-off operation. The product is reliable in performance, accurate in protection, high in breaking ability, small in volume, and beautiful in appearance. It is an ideal replacement product.  

The product conforms to the standard: GB10963.1, IEC60898-1.

Normal working conditions

1. The maximum ambient temperature should be-50℃≤T≤ +40℃, average temperature should be≤35℃ at 24h. 

2. installation altitude ≤ 2000m. 

3. The relative humidity should not exceed 50% at 40℃, it permits higher relative humidity when at a higher temperature, for example, it can be 90% at 20℃. And it should take consideration of the condensation on the product's surface for temperature change. 

4. Pollution degree: degree 2. 

5. Installation type: II, III.

6. The circuit breaker adopts installation by TH35-7.5 standard rail. The miniature circuit breaker is upright installation, knob upwards is switch on position 

7. No obvious shake and impact in mounting site.