Answer Posted / jayprakash

Buchholz Relay : Used as a protective device for
transformer against internal faults. If there is a fault
inside the transformer, due to heat gases will be generated
and trapped in Buccholz relay and will protect the
transformer.

Conservator : The transformer main oil tank is always
filled completely. During summer and heavy load conditions
the oil expands and the conservator is provided for the
expansion and contraction of oil

Breather : During contraction of oil, the outisde air gets
into transformer thru breather. The breather has silica gel
which absorbs the moisture. Also the breather has a oil cap
to stop entering the particles such as dust enter the
transformer

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