Answer / diwakar

there are two levels,in the first level if the level of oil
is decreased then it sends an alarm signal to the
operator,if the operator ignores then the gas formation in
the bank of relay increases then he second level of
protection is activated as it isolates the transformer.by
formation of gas in chamber they test the gas and conforms
where actual fault occured

Answer / pillay

When th oil level drops below the pre determined level the buchholtz relay will be trigered
A)if alarm level the alarm will be switched on
B)if trip level the transformer will be tripped off

Answer / ashoke

The buchholz relay will operate in high fault condition only
and there will be no primary alarm due to low oil lebel in
the primary stage of the fault and the X-mer in high risk
because the secondary switching will be depend upon the
quantity of gas formation .

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