27.5 kV AC Switchgears.  Single-line diagram 

Type	Description
Incomer Cubicle	Transformer winding connection with 27.5 kV busbars
Power Line Connection Cubicle	Power lines connection to 27.5 kV switchgear busbars
Feeder Cubicle	Traction network feeding line connection with 27.5 kV switchgear main busbar
Busbar Voltage Transformer Cubicle	Includes instrument voltage transformers providing 27.5 kV switchgear busbars voltage supervision
Section Switch Cubicle	Busbars sections interconnection at traction substations