... thermal relay can be used in the circuit of 50Hz or 60Hz, rated insulation voltage 660V, rated current 0.1-93A ... AC contact. Fundamental parameter of the main circuitRated insulation voltage 660V;Rated working current 25,36,93A separately;The ... 50-60Hz;Use group, rated working voltage, appoint thermal current and rated current. intelligent high voltage motor phase advancer Electric motor protector