A single line diagram(SLD) and a purchase order of a
11/66kV switchyard of a power plant was given. In the SLD,
only one lightning arrestor(LA) was shown, but the purchase
order had need of 3 LAs. Is this correct, if yes, why?
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Answer Posted / k.prakashchandra
We have 3 phase Tr ,breaker,G.O.S. but no 3 phase L.A.
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