What data are mainly measured in online monitoring of power transformers?

It mainly depends on the form of the transformer:

General detection of oil changes: oil temperature, oil level, gas (switching quantity: light gas alarm, heavy gas trip), etc.

General monitoring of dry transformers: temperature (temperature analog quantity, switching quantity: high temperature alarm, over-temperature trip), etc.

A transformer is a static electrical device used to convert AC voltage and current and transmit AC power. It realizes the transmission of electrical energy based on the principle of electromagnetic induction. Transformers can be divided into power transformers, test transformers, instrument transformers and special-purpose transformers according to their uses: Power transformers are necessary equipment for power transmission and distribution and power distribution for power users. Extended information

Detection of power transformer

1. Whether the load current is within the rated range, whether there are drastic changes, and whether the operating voltage is normal.

2. Whether the oil level, oil color, and oil temperature exceed the allowable values, and whether there is oil leakage.

3. Whether the porcelain sleeve is clean, whether there are cracks, damage, stains, discharge phenomena, and whether the contact terminals are discolored or overheated.

4. Whether the discoloration of the silica gel in the moisture absorber is saturated, and whether the operating sound of the transformer is normal.

5. Whether there is air in the gas relay, whether it is filled with oil, whether the glass of the oil level gauge is broken, and whether the diaphragm of the explosion-proof pipe is intact.

Baidu Encyclopedia-Power Transformer