... Phase sequence protection3,Under voltage protection4,Over voltage protection5 Model and meaning1.Full Function Protector Series4,Phase unbalance protectionDimensions(mm ... below, industrial three-phase 220V, 380V, 440V, 460V and so the voltage levels of a variety of fault ... rail protectors, equipped with two M4 screw structure, direct and independent installation or HT35 rail mounting.2) light: the ...