Functions of Auxiliary Circuit of AC Locomotive:
1) Auxiliary circuit is equipped with various auxiliary equipment like batteries, exhausters, air compressors, blowers, pumps, ventilating fans, heat light, flash light, horn which are helpful for operation of train.
2) The batteries are used for supplying relays and for emergency supply, charging batteries are possible with auxiliary circuit.
3) Exhauster and air compressors required for vacuum breaks and air breaks and they are controlled by auxiliary circuit.
4) Blowers and fans are used for cooling and ventilating purposes and they are controlled by auxiliary circuit.
5) Pumps are used for pumping, oil and water and they are controlled by auxiliary circuit.
6) Head light, flasher light is used for light up the track and also to worn the people on the track and they are controlled by auxiliary circuit.
7) Horn is used for to make alert people and animal about the presence of train and they are controlled by auxiliary circuit.
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