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List two major equipment at traction sub-station with their functions.

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Major equipment at traction substation: 

1) Transformer: To step down the busbar voltage from 132 kV to 25 kV. 2) Circuit Breaker: To disconnect the circuit in case of fault. Transformer CB trips on internal faults of transformer. Feeder CB trips on occurrence of fault on OHE. 3) Interrupter: To disconnect the circuit in case of fault. It cannot operate automatically.

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