Single phase / two-phase / three-phase power / electric hoist is best to use a household power upgrade authorities in power hoist popular speakers, single-phase power is a line of fire, a zero line, their composition is 220V single phase electricity; we usually say that generally refers to the three-phase three-phase four-wire system, namely three FireWire, a zero line, FireWire and FireWire voltage is 380V. The main difference is that they are two wire single-phase, three-phase is a four-line, as well as their different voltages. General household power supply is a two-phase power, suitable for mini electric hoist, two-phase electric hoist, electric hoist is a three-phase power supply for industrial use, improve strength, I produced a single-phase electric hoist, mini electric hoist two-phase, Three-phase and three-phase electric wire rope hoist electric hoist, various models please call us.