Potential Transformer

A voltage transformer, similar to a transformer, is an instrument used to change voltage. But the purpose of transformer voltage conversion is to facilitate the transmission of electrical energy, so the capacity is large, usually calculated in kilovolt amperes or megavolt amperes; The purpose of voltage transformers to change voltage is mainly to supply power to measuring instruments and relay protection devices, to measure the voltage, power, and energy of the line, or to protect valuable equipment, motors, and transformers in the line in the event of a fault. Therefore, the capacity of voltage transformers is very small, usually only a few volts amperes, dozens of volts amperes, and the maximum does not exceed one thousand volts amperes.