SC Public Utilities Electrical Practice Questions - South Carolina Public Utilities - Electrical Contractor Examination Exam

Oil in a liquid-filled overhead distribution transformer is used primarily to:

Increase the nameplate kVA by raising winding resistance Insulate the windings and transfer heat from the coils to the tank Serve as the multi-grounded system neutral Replace the need for a surge arrester on the primary

Correct Answer:

Insulate the windings and transfer heat from the coils to the tank

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