... of AC 50Hz, main circuit rated voltage up to 660V, current up to 630A, used as protecting AC three-phase motor ... reset setting, manual reset, rotating the reset button to the position of H, and it will protrude, auto reset, rotating the reset button to the position of A, trip/reset ... derives form tiny unceasing endeavor.” We sincerely hope to cooperate with you! GTH-85 thermal overload relay