Hyundai HGM630HF Adjustable Thermal MCCB Model

Overcurrent characteristics of MCCB has been set to the ambient temperature 40 degrees celsius. If the ambient temperature is less or more than 40 degrees celsius, the overcurrent characteristics can be changed. In order to ensure that circuit breaker's overcurrent meet the derating curve at the given Ambient temperature, the rear current (Ir) should be adjusted. The temperature correction ratio for each MCCB is shown on the circuit breaker Derating curve. If the internal temperature of the MCCB is over 40 degrees, thermal damage to the insulating material inside the MCCB can occur causing the circuit breaker to trip at an early stage. When applying ambient temperatures at higher than 40 degree celsius.