How to connect the wiring diagram of three-phase four-wire watt-hour meter

1 and the installation of three-phase watt-hour meter have two wiring modes. One is to connect the electric energy meter with a circuit transformer. The other is directly connected to the watt-hour meter.

2. The following is a description of direct wiring. First, buy a direct-connected watt-hour meter. For example, the current electronic watt-hour meter.

3, 1, 4, 7 are power supply incoming lines. There is no need to distinguish ABC three phases here, but there must be three fire lines, that is, three-phase lines, as shown in the figure below.

4. Then install the three-phase wire in the wiring hole. Pay attention to good contact, that is, tighten 2 screws. This is the incoming line.

5. Then connect the outgoing line. If the outgoing line is multi-stranded copper wire, it must be twisted into a single line, and there can be no cross line.

6. Finally, connect the zero line to the zero line position of the electric energy meter. The lines can be thinner, as shown in the figure below.