Potential transformer in substation,It is mainly used to supply power to measuring instruments and relay protection devices, to measure the voltage, power and energy of the line, or to protect the valuable equipment, motors and transformers in the line when the line fails, potential transformer in substation.Usually, has a very important role, and potential transformer in substation.What does it do? Generally only a few volts, tens of volts ampere, the maximum is not more than 1000 volts

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