![]() ![]() Īn Aron type DC electricity meter showing that the calibration was in charge consumed rather than energyĪs commercial use of electric energy spread in the 1880s, it became increasingly important that an electric energy meter, similar to the then existing gas meters, was required to properly bill customers, instead of billing for a fixed number of lamps per month.ĭC meters measured charge in ampere hours. Also, in some areas meters have relays for demand response load shedding during peak load periods. "Time of day" metering allows electric rates to be changed during a day, to record usage during peak high-cost periods and off-peak, lower-cost, periods. When energy savings during certain periods are desired, some meters may measure demand, the maximum use of power in some interval. They are usually read once each billing period. They are typically calibrated in billing units, the most common one being the kilowatt hour ( kWh). ![]() ![]() North American domestic electronic electricity meterĪn electricity meter, electric meter, electrical meter, energy meter, or kilowatt-hour meter is a device that measures the amount of electric energy consumed by a residence, a business, or an electrically powered device.Įlectric meter or energy meter measures the total power consumed over a time interval.Įlectric utilities use electric meters installed at customers' premises for billing and monitoring purposes. ![]()
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