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When the generator normal start, the first to get the boot by starting the power / standby transformer, when the generator voltage and the establishment of normal with a certain load, switching power supply to the plant by plant operating transformer power switching device; and a generator shutdown process the opposite. Thus, no generator breaker power plants, its normal start and stop switching unit inevitable to work with associated transformer and the start / standby transformer between the plants. Since the auxiliary power supply transformer and the start / standby transformer from different systems, the impedance value of the two transformers is not the same, which resulted between the two transformer low voltage side of the bus initial phase. Because of the initial phase difference, so that the normal parallel connection, will have a greater circulation between the two transformers. Severe cases, circulation up to several thousand amperes, such a large circulation even in a parallel transformer switching time not to cause harm, will have a cumulative impact on the life of the transformer. This is the safe operation of the transformer constitutes a great threat.

Electricity power plant accident in the switching process, there are the normal process of switching the auxiliary power plant working with the bus voltage and phase start / standby bus voltage. The phase difference is too large, it is difficult to ensure a successful handover of accidents, and equipment will cause direct harm. For example, in an accident fast cutting process, if allowed to phase tuning is too large (more than 40 °), the high-voltage electric motor transient surge current rating of up to 18 times, most likely to cause damage to high-voltage electric motor, which is safe operation is not allowed, even if the phase tuning to the extent permitted, due to frequent switching power supply factory caused by over-voltage, over-current, over-load and safe operation will continue for the life of the equipment adversely influences. Therefore, to avoid reducing auxiliary power switch will increase the safety and reliability of plant operation.Perkins 1103A-33TG1 diesel generator Perkins 1103A-33TG2 diesel generator Perkins 1104A-44TG2 diesel generator Perkins 1104C-44TAG2 diesel generator Perkins 1006TAG diesel generatorPerkins 1006TAG2 diesel generator Perkins 1106A-70TAG3 diesel generator Perkins 1106A-70TAG4 diesel generator Perkins 1306C-E87TAG3 diesel generator Perkins 1306C-E87TAG4 diesel generator Perkins 1306C-E87TAG6 diesel generator Perkins 1606A-E93TAG4 diesel generator Perkins 1606A-E93TAG5 diesel generator Perkins 2206A-E13TAG2 diesel generator Perkins 2206A-E13TAG3 diesel generator Perkins 2506A-E15TAG1 diesel generator Perkins 2506A-E15TAG2 diesel generator Perkins 2806C-E18TAG1A diesel generator Perkins 2806A-E18TAG2 diesel generatorPerkins 4006-23TAG2A diesel generator Perkins 4006-23TAG3A diesel generator Perkins 4008TAG1A diesel generator Perkins 4008TAG2A diesel generator Perkins 4012-46TWG2A diesel generatorPerkins 4012-46TWG3A diesel generator Perkins 4012-46TAG2A diesel generator Perkins 4012-46TAG3A diesel generator Perkins 4016TAG1A diesel generator Perkins 4016TAG2A diesel generatorPerkins 4016-61TRG3 diesel generator