Answer / hemantha madurapperuma

The question should be re-phrased. Though there are numerous advantages of the vertically isolated MV switchgears, the design has been phased-out altogether.

The main advantage of the vertical isolated design, all critical insulation surfaces being vertically disposed , least pone to surface contamination.

why we are used D.c. voltage in L.T.side or controling side.we can use UPS also ,in place d.c. voltage

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why PT Primary are the grounded?

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which INDIAN STANDERD in Mention the earth test value?

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