Profile: Shanghai Launch Electric Co., Ltd. designs, manufactures, and sells high voltage electric equipment. Our main products include high voltage complete test systems, and testing instruments such as power transformer test system, instrument transformer test system, PD test system, various AC test systems, series resonant test system, impulse voltage/current test system, high voltage capacitive bridge, and series high voltage standard capacitors. High voltage reactor is used as component for adjusting inductance of HV series resonance testing set. It can also be used to compensate the capacitive current of the test samples with big capacities.