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20 Dec 2014 A2A. Reasons for using Stones in Substation : * Power Transformers installed in the substations will have oil as cooling and insulating medium. Oil leakage

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2. Power Transformers installed in the substations will have oil as cooling and insulating medium. Oil leakage takes place during operation or when changing the oil in the transformer. This oil spillage which can catch fire is dangerous to the switchyard operation. So Stones/Gravel is provided to protect from fire when oil spillage takes place.

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