Self-generating power and commercial power switching automatic prompting device

The utility model relates to a self-generating power and commercial power switching automatic prompting device which is composed of a self-generating power switching circuit, a commercial power switching circuit, and an alarm circuit. The self-generating power switching circuit includes a first intermediate relay KA1, a second intermediate relay KA2, a first fuse FS1, and a second fuse FS2. The commercial power switching circuit includes a first alternating current contactor KM1, a second alternating current contactor KM2, the first intermediate relay KA1, the second intermediate relay KA2, a motion time-delay closing time relay KT, a third fuse FS3, and a fourth fuse FS4. The alarm circuit includes a first breaker, a second breaker, the first alternating current contactor KM1, the second alternating current contactor KM2, an alarm lamp D, and an alarm bell DL. The self-generating power and commercial power switching automatic prompting device saves the artificial self-generating power and commercial power sw