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

A no-load tap changer (NLTC) on a distribution transformer is intended to be operated:

Under full load to regulate feeder voltage in real time Only after the transformer has been deenergized From the secondary breaker handle while the primary is hot By shorting adjacent taps with a hot-line clamp

Correct Answer:

Only after the transformer has been deenergized

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