The invention discloses a mutual
inductor handover test switching device and a switching method thereof. The device comprises four sets of switching circuits, respectively a first group of secondary winding
switching loop, a second group of secondary winding
switching loop, a third group of secondary winding
switching loop and a fourth group of secondary winding switching loop, each of the switching circuits comprises an I+ input end, an I-input end, a U+ input end, a U- input end, a first selector switch, a second selector switch, an output end E, an output end L and an output end D. The I+ input end and the U+ input end are connected to one end of a secondary winding of the
transformer in parallel, the I- input end and the U- input end are connected to the other end of the secondary winding of the
transformer in parallel, the I+ input end is connected to the output end D and the I- input end through a first selector switch, and the I- input end is connected to the output end E and the output end L through a second selector switch. According to the invention, the mutual
inductor with no more than four groups of secondary windings can be tested, the switching loop is simple, the switching is convenient, the test during mutual
inductor handover is rapidly realized, the test time is shortened, and the
test efficiency is improved.