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What is the purpose of taking Capacitance and Tan Delta
Test in Transformer bushing?
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Answer Posted / ashish
tan delta (loss angle ) and cap is taken of the enquipment
such as CTs and TRF bushings wherein paper and other
material is utilised in its insulation.
tan delta and cap values indicates to you the condition of
the bushing insulation.
if a plot is plotted aginst the no of years of the bushing
in service and the value of tan delta taken every year, you
shall get the trend of insulation detoriation.
the higher side of tan delta value is 0.007.
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