AIC Technik Private Limited

Thermal Overload Relays

Thermal overload relays are economic electro mechanical protection devices for the main circuit. They offer reliable protection for motors in the event of overload or phase failure. Starter combinations are setup together with block contactors and mini contactors.

This leads to a release of the relay and a change of the contacts switching position.

The thermal overload relays are three pole relays with bimetal tripping elements. The motor current flows through the bimetal tripping elements and heats them directly and indirectly. In case of an overload (over current), the bimetal elements bent as a result of the heating.