NV A-17 Transmission Lines Practice Questions - Nevada A-17 Lines To Transmit Electricity Contractor Examination Exam

A no-load tap changer on a primary overhead distribution transformer is intended to be operated:

While the transformer is energized and carrying full load As a substitute for a line voltage regulator under varying daily load Only after the transformer is deenergized, to select a different primary voltage tap To reverse polarity so two tanks can be paralleled

Correct Answer:

Only after the transformer is deenergized, to select a different primary voltage tap

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