Meter Principle

Meter works
When the access to the circuit under test electric meter ,  the current coil and the voltage coils have alternating current flows through the two alternating currents are

generated in the core in their alternating magnetic flux; wear alternating flux Over the aluminum plate, the eddy currents induced in the aluminum pan; eddy currents

in the magnetic field and by

The force, so that the aluminum plate to obtain torque (active torque) is rotated. The greater the power consumed by the load, the larger the current through the

current coil, eddy currents induced in the aluminum plate is larger, the aluminum disk rotation torque is greater. The size of the torque with load consumption

The power is proportional. The greater the power, the greater the torque, aluminum disc rotation sooner. Aluminum plate rotates, but also by the braking torque

generated by the permanent magnets of the role of the braking torque with the driving torque in the opposite direction; size of the braking torque is proportional to

the rotational speed of the aluminum plate, aluminum

Disk rotates faster, the greater the braking torque. When the driving torque and braking torque to achieve temporary equilibrium, the aluminum plate will be uniform

rotation. Power consumed by the load and the number of revolutions is proportional to the aluminum plate. Aluminum plate rotates, driven by the counter, the energy

consumed out instructions.

This is a simple processElectric energy meter work.