1. Functional characteristics

　　1. Display the three-phase power incoming line voltage.

　　2. Display three-phase working voltage and single-phase power supply voltage.

　　3. Provide 3-way three-phase four-wire power sockets.

　　4. Provide 5-way single-phase power sockets.

　　5. Provide a separate power socket for the tapping machine.

　　2. Main technical indicators

　　1. Environmental conditions

　　Temperature: -5°C～40°C

　　Relative humidity: <95% (25°C)

　　Altitude: <2500m

　　External interference: no strong vibration, no strong electromagnetic field

　　Power supply: 160VAC~280VAC, 45Hz~55Hz

　　2. Rated current range

　　Three-phase socket rated current: 25A

　　Three-phase switch rated current: 25A

　　Single-phase socket rated current: 16A

　　Single-phase switch rated current: 16A

　　Tapping machine socket rated current: 16A

　　Frequency: 45Hz～65Hz

　　3. Insulation strength

　　1) The insulation resistance of the voltage and current input terminals to the chassis is ≥100M?.

　　2) The power frequency between the input terminal of the working power supply and the shell is 2KV (effective value), and the experiment lasts for 1 minute.