Blue

Brown

Violet

Pink

Oil blast cooling method

Air blast cooling method

Forced circulation of cooling method

Natural air cooling method

to prevent flow of moisture into the tank

to prevent flow of air into the tank

to regulate the expansion and contraction of oil

to improve power factor

arrest the flow of moisture into the tank

disconnect the transformer, when dead short circuit fault occur

flow insulating oil from the conservator tank

control the level of oil tank

The output will be 240 V

The output will be 415 V

The transformer may burn

Remains as it is