Energy Meter

Energy Meter or Watt-Hour Meter is an electrical instrument that measures the amount of electrical energy used by the consumers. ... If one uses one kilowatt in one-hour duration, one unit of energy gets consumed. So energy meters measure the rapid voltage and currents, calculate their product and give instantaneous power.The energy meter is used to measure the energy used by the electric load. The energy is the total power used by the load at a particular time. It is used to measure the power consumption.