What is the use of conservater, bucchos relay, breather in
a transformer?

Answer Posted / rvg

Buchols relay is to protect the winding from over heat, and
the circuit will be tripped off as soon as the coil attains
a pre determined temp.
Conservator is to store additional cooling oil, and same
oil can be make use later also.
Breather is to absorbe moisture contents from air which
sucks in while the oil get expanded.

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