First of all, you need to confirm whether your welding machine supports 220V and 380V voltages. Usually, the input voltage range of electric welding machine will be indicated in the equipment identification or manual. If your welding machine only supports one voltage, then you can only work with that voltage, not 220V and 380V at the same time.
Next, you need to prepare the corresponding power socket and power cord. For the voltage of 220V, you can use an ordinary household socket, while for the voltage of 380V, you need to use a special three-phase socket. Please ensure that the load capacity of the socket and power cord is sufficient to support the power demand of the welding machine.
When wiring, it is necessary to make correct connections according to the terminals of the welding machine. Usually, the terminals of electric welding machine will be marked with L 1, L2, L3 and N, etc. For the voltage of 220V, L 1 and N can be connected to the live wire and zero wire of the socket respectively; With a voltage of 380V, L 1, L2 and L3 can be connected to the three-phase live wire of the socket respectively, and N can be connected to the zero line.
After the wiring is completed, you need to check whether the wiring is firm and make sure there is no looseness or short circuit. After the wiring is completed, you can plug in the power cord and turn on the power switch of the welding machine. At this point, you can perform welding operation as required.
It should be noted that when wiring, it is necessary to ensure that the power supply has been disconnected and operated in the correct wiring mode. If you are not sure about the connection mode of the welding machine, it is recommended that you consult a professional or contact the after-sales service department of the welding machine for consultation and guidance.
In a word, correct wiring is an important link to ensure the normal operation of the welding machine. By wiring according to the above steps, you can correctly connect Qingdao Hite welding machine ZX7-400M to 220V or 380V power supply to meet your work requirements.