VOLTAGE PROTECTION RELAY; 47-SEQ / IEEE C37-2 PHASE BALANCE; ELECTRONIC; IEC 60255-127 SPECIFICATION, ; THREE-PHASE; INSTANTANEOUS; VOLTAGE ADJUSTMENT RANGE 440 – 480 VAC; TP / 220V VOLTAGE CONNECTION; 60HZ, ; LED SIGNALING; 1NA / 1NF AUXILIARY CONTACTS; AUTOMATIC RESET;