Thursday, August 21, 2008

Working of Electricity meter

The domestic electricity meter basically consists of two important coils for its working.
  1. The voltage coil
  2. The current coil
  • The voltage coil is connected in parallel to the load and the current coil is connected in series to the load.
  • The load herein refers to the appliances that consume electricity.
  • When power passes through these coils, a magnetic field is produced which induces an electro magnetic field in the rotor disc.
  • As a result of this magnetic field, eddy currents are produced in the rotor disc.
  • An opposing magnetic field is produced by the permanent stator magnets, which results in rotation of the rotor disc.
  • The disc rotates according to the power consumed by the consumer unit.

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