Which transformer is used to provide a reduced voltage for metering and protection applications?

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Multiple Choice

Which transformer is used to provide a reduced voltage for metering and protection applications?

The device that provides a reduced-voltage, isolated representation of the high-line voltage for metering and protection is a potential transformer. It steps the high voltage down to a safe, standard level and preserves the voltage’s phase relationship so meters and protection relays can measure accurately without exposure to high voltage. Current transformers handle current scaling, not voltage; distribution transformers feed lower voltages to customers, and power transformers are large devices for transmission, not specifically used for metering and protection.

The device that provides a reduced-voltage, isolated representation of the high-line voltage for metering and protection is a potential transformer. It steps the high voltage down to a safe, standard level and preserves the voltage’s phase relationship so meters and protection relays can measure accurately without exposure to high voltage. Current transformers handle current scaling, not voltage; distribution transformers feed lower voltages to customers, and power transformers are large devices for transmission, not specifically used for metering and protection.

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