SC series AC rs are mainly used for AC 50Hz / 60Hz.rated voltage up to 660V and rated current up to 95A for remote switch, breaking and frequent starting, controlling the AC motor. Moreover, the r can act as the time-delay r, reversible r, star-delta starter by the accessories addition such as addition of modular auxiliary set. Air time delay head, mechanical interlock mechanism, etc. Moreover,it could act as the electromagnetic starter by the direct plug of the thermal relay.