The rotation of the disc is transmitted to the pointers of the different dial for recording the different readings. Their rotation is directly proportional to the energy consumed by the loads in the kilowatt hour. Registration (Counting Mechanism) – The main function of the registration or counting mechanism is to record the number of rotations of the aluminium disc. The permanent magnet is adjustable due to which the braking torque is also adjusted by shifting the magnet to the other radial position.Ĥ. This braking torque opposes the movement of the disc, thus reduces their speed. The eddy current cut the magnetic flux of the permanent magnet and hence produces the braking torque. The aluminium disc induces the eddy current because of their rotation. Braking system – The permanent magnet is used for reducing the rotation of the aluminium disc. The disc measured the power consumption in kilowatt hours.ģ. The number of rotations of the disc is counted at particular interval of time. When the devices consume power, the aluminium disc starts rotating, and after some number of rotations, the disc displays the unit used by the load. The interaction of the flux and the disc induces the deflecting torque.

This eddy current is cut by the magnetic flux.

The eddy current is induced in the disc because of the change of the magnetic field. The disc is placed in the air gap of the two electromagnets. Moving System – The moving system is the aluminium disc mounted on the shaft of the alloy. The main function of the copper band is to align the flux produced by the shunt magnet in such a way that it is exactly perpendicular to the supplied voltage.Ģ. The centre limb of the magnet has the copper band. The coil of the shunt electromagnet is directly connected with the supply and hence carry the current proportional to the shunt voltage. The series electromagnet is excited by the load current flow through the current coil. The upper one is called the shunt electromagnet, and the lower one is called series electromagnet. The driving system has two electromagnets. The core of the electromagnet is made up of silicon steel lamination. It is the temporary magnet which is excited by the current flow through their coil. Driving System – The electromagnet is the main component of the driving system. The detail explanation of their parts is written below.ġ. The construction of the single phase energy meter is shown in the figure below.

Digital electric meter function