Working Principle Of Single-phase Watt Hour Meter

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 are generally civil equipment connected to 220V.

Working principle of watt hour meter:

We know that the watt hour meter uses the eddy current generated by the voltage and current coil on the aluminum disk to interact with the alternating magnetic flux to generate electromagnetic force to make the aluminum disk rotate. At the same time, the braking torque is introduced to make the rotation speed of the aluminum disk proportional to the load power. Through the axial gear transmission, the rotation number of the rotary table is calculated from the meter product to measure the electric energy.