HGL isolation switch, Model no.:HGL-63, 100, 160,250, 400, 630, 1000, 1250, 1600, 2500, 3150, 4000 Poles: 3 pole or 4 ples HGL isolation switch,Model no.:HGL-63, 100, 160,250, 400, 630, 1000, 1250, 1600, 2500, 3150, 4000Poles: 3 poles or 4 poles High veracity Load Isolating switch