Oil-immersed voltage transformer

Voltage transformer [1] (PT, VT) is similar to transformer, which is used to transform voltage. However, the purpose of transformer voltage transformation is to facilitate the transmission of electric energy, so its capacity is very large, which is generally calculated in kilovolt ampere or megavolt ampere; the purpose of voltage transformer transformation voltage is mainly used to supply power to measuring instruments and relay protection devices, to measure the voltage, power and electric energy of the line, or to protect the valuable equipment in the line when the line fails Therefore, the capacity of voltage transformer is very small, generally only a few volt ampere, dozens of volt ampere, the maximum is not more than 1003 volt ampere. The article introduces its basic structure, working principle, main types, connection mode, matters needing attention, abnormality and handling, and ferromagnetic resonance.