How to chake transformer

Question

Accepted Answer

To check a transformer, perform visual inspection, measure voltage and current, and test insulation resistance.

Perform a visual inspection of the transformer for any physical damage or signs of overheating.
Measure the voltage and current using a multimeter to ensure they are within the rated values.
Test the insulation resistance using a megohmmeter to ensure it is above the minimum value.
Perform a polarity test to ensure the connections are correct.
Check the oil level and quality in oil-filled transformers.
Perform a load test to ensure the transformer can handle the rated load.
Check the grounding and bonding of the transformer.
Perform a frequency response analysis to detect any internal faults.
Perform a dissolved gas analysis to detect any internal faults.
Check the protective devices such as fuses and circuit breakers.
Perform a transformer turns ratio test to ensure the turns ratio is within the rated value.

Accepted Answer

Measuring the voltage across the transformers terminals with the voltmeter

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