For the given circuit shown in figure, D1 is forward bias mode - On state D2 is in reverse bias mode - off state D3 is in reverse bias mode - off state.
Intern turn winding fault can be easily detect by differential protection relay. Also detect by buchholz relay (gas operated relay), cause buchholz relay is used to detect the internal fault of transformer.
Tank - Name of power station - capacity 1 - Vindhyachal Thermal Power Station - 4,760MW. 2 - Mundra Thermal Power Station - 4620 MW 3 - The Sasan Ultra Mega power plant - 3960 MW 4 - The Tiroda thermal power plant - 3300 MW
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