Attributes . 2 HP 115 V AC 50/60 HZ 1 PHASE-5 HP 230/240 V AC 50/60 HZ 1 PHASE-7.5 HP 200/208 V AC 50/60 HZ 3 PHASE-10 HP 230/240 V AC 50/60 HZ 3 PHASE-20 HP 460/480 V AC 50/60 HZ 3 PHASE-30 HP 575/600 V AC 50/60 HZ 3 PHASE,BUILT-IN BIDIRECTIONAL PEAK LIMITING DIODE SUPPRESSOR . Names