Combined electric appliance with auxiliary main transformer interval

The utility model relates to the field of combined electric appliances, in particular to a combined electric appliance with an auxiliary main transformer interval. The system comprises a bus I, a bus II, an auxiliary bus, a main transformer interval T1, a main transformer interval T2 and an auxiliary main transformer interval, a first string of circuit breaker intervals and a second string of circuit breaker intervals are arranged between the bus I and the bus II; the main transformer interval T1 is spaced by a first string of circuit breakers for wire outgoing; the main transformer interval T2 is spaced by a second string of circuit breakers for wire outgoing; the main transformer interval T1 and the main transformer interval T2 are connected through an auxiliary bus; the auxiliary main transformer interval is arranged on the auxiliary bus and located between the main transformer interval T1 and the main transformer interval T2. By means of the arrangement, when one of the main transformer interval T1 and th