HKH-22 thermal relay/thermal overload relay/relay:
This series of thermal relay can be used in the circuit of 50 HZ of 60HZ, rated insulation voltage 660V, raged current 0.1-93A for protecting the phase break when the electric motor is overload.
The relay has different mechanism and temperature compensation & can be pluged in HC1-D series AC contactor. It is the most advanced thermal relay in the nineties in the world.