Answer Posted / sripellirajukumar

hi this is rajukumar
transformer testing engineer
actually in power transformer we will be using one sensor
that is WTA ..windidng temperature indicator..by that device
we can check the winding temperature of transformer.. when
the fault occures the winding temperature much be rised....
at that fault time this WTA will sence the obnormal
temperature of winding then it will send trip signal to the
ckt breaker...
but in heat run test we can not find the winding temperature
..but we can find how much the transfomer is heating on full
load current...



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