Shop site installation cases

Basic current and rated maximum current. The basic current (calibration current) is the current value to determine the relevant characteristics of the electric energy meter. It is the basic working current of the electric energy meter, expressed in IB; the rated maximum current is the maximum current value that the instrument can meet the accuracy specified in the manufacturing standard. In IMAX. For example, 1.5 (6) a means that the basic current value of the electric energy meter is 1.5A, and the rated maximum current is 6A. If the rated maximum current is less than 150% of the basic current, only the basic current is indicated. For a three-phase watt hour meter, multiply the number of phases in front, such as 3 × 5 (20) a.
Reference voltage. The reference voltage is the voltage value to determine the relevant characteristics of the watt hour meter, and is the working voltage of the watt hour meter, expressed in UN. For the three-phase three wire watt hour meter, the reference voltage is expressed by multiplying the phase number by the line voltage, such as 3 × 100V; for the three-phase four wire watt hour meter, it is expressed by multiplying the phase number by the phase voltage / line voltage, such as 3 × 220 / 380V; for the single-phase watt hour meter, it is expressed by the phase voltage, such as 220 v.
Reference voltage. The reference voltage is the voltage value to determine the relevant characteristics of the watt hour meter, and is the working voltage of the watt hour meter, expressed in UN. For the three-phase three wire watt hour meter, the reference voltage is expressed by multiplying the phase number by the line voltage, such as 3 × 100V; for the three-phase four wire watt hour meter, it is expressed by multiplying the phase number by the phase voltage / line voltage, such as 3 × 220 / 380V; for the single-phase watt hour meter, it is expressed by the phase voltage, such as 220 v.