In operating a 33kV double feeder circuit with one on each side of the bus connected to a transformer each and to an 11kV bus. Which is better?
1. Coupling the 33kV buses and decoupling the 11kV buses.
2. Decoupling the 33kV buses and coupling the 11kV buses thereby neither paralleling of feeders nor trafos.
3. Coupling both the 33kV and 11kV buses at the station thereby parallel the trafos as well as the feeders.