Phase Rotation Indicator 1.Phase detection (Normal, Reverse) 2.Electricity range:AC60~600V,40 Hz~70Hz 3.1.6~16mm,ISO,CE,OEM ETCR1000D Phase ... terminal, and connect the three bare alligator clips or test pins of phase sequence meters to the three bare firing lines, while ... high-voltage bare fire-wire, the test can be made by directly clamping the three-phase insulating sheath by three super-sensitive ...