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Voltage transformer
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It is an instrument used to change voltage. The purpose of changing voltage is mainly to supply power to measuring instruments and relay protection devices, to measure the voltage, power and electric energy of lines, or to protect valuable equipment, motors and transformers in lines when lines fail. Therefore, the capacity of voltage transformers is very small, generally only a few volt amperes, tens of volt amperes, and at most one-thousand-volt amperes.
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