Knowledge

​This meter is used to measure the three-phase four-wire AC active energy with a rated frequency of 50HZ and a reference voltage of 3×220/380V.

If it is found that it is a lead-free or expired watt-hour meter, please ask the relevant department to re-calibrate before installing and using it to ensure accurate measurement o

​In low-voltage three-phase four-wire lines, three-element three-phase watt-hour meters are commonly used. If the load current on the line does not exceed the range of the watt-hou