How to connect two-phase welding machine to three-phase switch

Two-phase welding machine can choose to use 380V power supply or 220V power supply. Two wires are led out from the 380V terminal of the welding machine, and any two of them can be connected to the three-phase switch for use. Usually, except for the 380v AC welding machine, people seldom use it. In the three-phase three-wire system, it is not allowed to use single-phase electricity casually, only three-phase four-wire or five-wire is needed.

Three-phase alternating current is a transmission form of electric energy, which is called three-phase electricity for short. Three-phase AC power supply consists of three AC potentials with the same frequency, equal amplitude and phase difference of120. Three-phase electricity usually uses three-phase wires with a voltage of 380v, which is widely used for power supply in enterprises, factories and other places; Two-phase electricity usually uses live wire and neutral wire with a voltage of 220v, which is widely used for power supply in homes, schools and other places.