# What is the difference between 220V single-phase inverter and 380V three-phase inverter?

2021-11-03 10:50:07 jact_elec

What is the difference between 220V single-phase inverter and 380V three-phase inverter?

The inverters we often talk about are generally low-voltage inverters, and low-voltage inverters are classified according to the power supply voltage, and are divided into 220V single-phase inverters and 380V three-phase inverters. The biggest difference between a single-phase inverter and a three-phase inverter is: the power of a single-phase inverter is 220V, which is composed of 1 live wire and 1 neutral wire. Because it is a live wire, it is called single-phase; The inverter is a three-wire input, so it is called a three-phase inverter, also known as a three-phase electric input inverter.

In addition, the output voltage of single-phase inverters is divided into single-phase output and three-phase output. Only single-phase output is non-standard and easy to break.

It is single-in and single-out. The standard is that single-phase inverters are single-phase , Three-phase output; and the three-phase output here does not exceed the power supply voltage.

If it is a single-phase 220V input, then the output is three-phase 220V, which is a bit different from the output of a three-phase inverter.

Then their corresponding motor wiring methods are a bit different. If the wiring does not match the voltage, the motor will be weak. • Single-phase input means that the power supply input has only two wires (a neutral wire and a live wire), and the phase voltage of the input voltage is 220V.

• Three-phase input means that the power supply input has three lines (three-phase three-wire) or four lines (three-phase four-wire). Generally, there are relatively more three-phase four-wires. Input two live wire, one neutral wire, the phase voltage of each live wire to the neutral wire is 220V, and the line voltage between the three live wires is 380V.

It is worth noting that: Three-phase motor controllers are generally only available in industrial power applications, and most households only use single-phase power.

The single-phase power supply inverter can be used where there is three-phase four-wire power supply (connect one of the live wire and one of the neutral wires).

Therefore, before purchasing a single-phase inverter or a three-phase inverter, be sure to confirm the power supply at the location where it is installed and used.