Parts Of kW-hr Meter

Electricity Meters Basic Parts are found below. These are for the electromechanical type.


Basically, the electromechanical watthour meter consists of a motor whose torque is proportional to the power flowing through it, a magnetic brake to retard the speed of the motor in such a way that it is proportional to power (by making the braking effect proportional to the speed of the rotor), and a register to count the number of revolutions the motor makes and convert, store, and display these revolutions as watthours.

Figure below shows these parts.

If the speed of the motor is proportional to the power, the number of revolutions will be proportional to the energy.

Basic Parts of a Watthour Meter.