How to choose the size of the energy meter

(1) Select the type of the energy meter according to the task. When single-phase power is used, single-phase electric energy meter is used; when three-phase power is used, three-phase four-wire electric energy meter or three single-phase electric energy meters are selected; except for complete power distribution equipment, three-phase three-wire electric energy meter is generally not used.

(2) Select the model of the energy meter according to the maximum current and rated voltage of the load and the accuracy of the required measured value. The rated voltage of the energy meter should be consistent with the rated voltage of the load; and the rated current of the energy meter should be greater than or equal to the maximum current of the load.

(3) When there is no load, the aluminum turntable of the electric energy meter should be stationary. When there is no current in the current line of the electric energy meter and there is a rated voltage on the voltage line, the rotation of the aluminum disc should not exceed the allowable value of the creep.