On site precision detecting test line for high-voltage current transformer

The invention relates to a high-voltage power transmission and transformation current detecting technology which discloses an on-site accuracy detecting and testing line of a high-voltage current mutual inductor and is adapted to the on-site accuracy detection of an ultra-high voltage (750 kV) current mutual inductor. The on-site accuracy detecting and testing line of the high-voltage current mutual inductor comprises a voltage regulator, a current raising device, a compensated capacitor, a main loop, a testing power supply which is electrically connected with the first side of the voltage regulator, a standard current mutual inductor, an on-site current mutual inductor and a mutual inductor check meter, wherein the standard current mutual inductor and the on-site current mutual inductor are arranged on the main loop, the mutual inductor check meter is electrically connected with the standard current mutual inductor and the on-site current mutual inductor, the second side of the voltage regulator is electrically connected with the first side of the current raising device, and the second side of the current raising device is electrically connected with the main loop. The invention is characterized in that the compensated capacitor is connected in the main loop in series.