What is voltage transformer?

Voltage transformer is sometimes called as potential transformer which is used to measure the voltage of the line. Basically it is a step down transformer which reduces the line voltage to minimum voltage (safe voltage) which a voltage meter can measure. It also isolates the high voltage line and metering circuit to safe guard the metering circuit during a fault condition.

Voltage transformers are usually connected between line and ground in which it is protected with the fuses.