Variety of power system voltage levels are through the power transformer to convert

Variety of power system voltage levels are through the power transformer to convert the voltage increases as step-up transformer (transformer substation for the booster station), the voltage is reduced to step-down transformer (transformer  air circuit breaker  for the buck stop). A voltage-selection voltage into another two coils (windings) of the double ring transformer, a voltage-selection of two voltage into three coils (windings) of three times the transformer.  circuit breakers  circuit wiring refers to transmission lines into the substation, all electrical equipment (transformers and inlet and outlet switches, etc.) of each  mcb circuit breaker . Its wiring scheme are: line transformer group, bridge connection, single busbar, single busbar, double busbar, double busbar, ring network power supply.