Premium Quality Black Safety Circuit Breaker
Available in 63A
Thermal protection trips when there is an overload condition: the excessive current heats up a bimetallic contact that expands until the current is interrupted. The thermal response is slow to allow short duration over current conditions, which is normal in some devices such as electric motors during startup.
Magnetic protection trips in response to the high currents present during electric faults The current causes a strong magnetic field through induction, which is used to open contact and interrupt the circuit. The response is immediate to minimize the harmful effects of electric faults.