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what is tan delta measurement?..... why that terminal is
earthed.....?
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Answer Posted / ravindrareddy
plat earthing good earthing
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explain remenance . differentiate high remenance type ct & low remenance type ct
L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.
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