Advanced impact testing device was employed to study the performance of the MOV under the lightning impulsion.Residual voltage change of the MOV active energy coordination,along with the coordination forms,were comprehensively analyzed in impact testing.Testing results showed that avalanche breakdown was the main damage form when the MOV absorbs more energy in the transient process.The test of MOV s AEC in serial and parallel connection indicated that compared with a single MOV,several MOV s parallel connec...