AST-22 Thermal Overload Relay
AST
Characteristics
AST- type thermal overload relay is mainly used in the electric system with AC 50Hz-60Hz, rated operation voltage up to 660V,current to 800A. It is used to protect AC three-phase asynchronous motor against overload and open-phase. This products can be properly combined with contactors and installed in an enclosure as motor starter to protect the motor from overload and open phase.