Switching method for debugging standby power supply of relay protection auxiliary tester

The invention provides a switching method for debugging a standby power supply by using a relay protection auxiliary tester, and the relay protection auxiliary tester comprises a cabinet housing and a top panel. The method comprises the following steps of: 1, simulating a circuit breaker DL1 by using a simulation device input panel (1), simulating a circuit breaker DL2 by using a simulation device input panel (2), and simulating a circuit breaker DL3 by using a simulation device input panel (3); a second step of connecting a tripping circuit breaker DL1 output contact of the standby power supply switching device to COM and 1T jacks of an input panel of the simulation device; step 3, connecting a switching-on circuit breaker DL2 output contact of the standby power supply switching device to COM and 2H jacks of an input panel of the simulation device; and 4, respectively connecting the COM, 1TW, 2TW and 3TW of the output panel (7) into the standby power supply switching device to serve as the positions DL1, DL2