When conducting transformer turns ratio and group tests in the field, several common problems repeatedly arise: single-phase phase-by-phase testing requires separate measurements of phases A, B, and C; slight differences in contact resistance during the three wiring operations can reduce the lateral

Resistive Voltage DividerThe internal resistance of the high-voltage resistance divider is pure resistance, with simple structure, convenient use, high accuracy and good stability, and is widely used. The resistive voltage divider is not suitable for measuring higher AC voltage, because it is relate

The measurement error of the transformer is related to the impedance of the secondary circuit. The increase of the impedance will increase the error, and the accuracy will decrease. Therefore, the external impedance is a key factor in determining the exact level at which the current transformer oper