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Using two CTs and three ammeters can only measure three-phase symmetrical loads. If the three-phase loads are asymmetrical, the load current of the phase that is not equipped wi...

There is no difference. The three-phase four-wire "mutual inductance meter" is actually equivalent to a three-phase four-wire 5A (ampere) electric energy (kWh) meter, but the in...

​The three-phase watt-hour meter fully complies with the relevant technical requirements of 1 or 2 single-phase in the ministry standard DL/T645-1997 and the national standard G...

Three-phase voltage indication is unbalanced: one phase is reduced (can be zero), the other two phases are normal, the line voltage is abnormal, or accompanied by sound and ligh...

​The main structure of watt hour meter is composed of voltage coil, current coil, rotary table, rotating shaft, brake magnet, gear, meter, etc. Single phase electricity meters a...

It is suitable for commercial buildings and public infrastructure buildings to realize the measurement and statistics of electric energy consumption in different areas or differ...

Before the voltage transformer is put into operation, the test and inspection shall be carried out according to the items specified in the regulations.

Single-phase wiring can be used to measure the line voltage of 35kV and below systems that are not directly grounded at the neutral point or the phase-to-ground voltage of syste...

It can be divided into two-winding and three-winding voltage transformers. In addition to the primary side and the basic secondary side, the three-winding voltage transformer al...

​The working principle is the same as that of the transformer, and the basic structure is also the iron core and the primary and secondary windings.

​The basic structure of the voltage transformer is very similar to that of the transformer. It also has two windings, one is called the primary winding and the other is called t...

Due to the repeatability (reproducibility) and consistency of the graphics, wiring and assembly errors are reduced, and equipment maintenance, debugging and inspection time are ...