The main wiring of 110kv adopts int

The main wiring of 110kv adopts internal bridge wiring, which is divided into internal bridge and external bridge, the common feature is that the two circuits are connected by bridge arms on the secondary side input line of the two transformers. The bridge arm connected inside the incoming circuit breaker is called an internal bridge, and connected outside the incoming circuit breaker is called an external bridge. Different lines are longer or need not be due to the situation of frequent switching transformers, and the external bridge wiring is suitable for the situation where the power system line is short or we need to change frequently transformer. The wiring of the bridge is complicated, there are many high voltage equipment, the operation is impractical and the investment is large. The user's power system has few applications