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Testing method of transformer DC resistance tester

time:2020/11/5   source:华天电力  reading:236 time

Transformer DC resistance tester is a commonly used high-voltage electrical test equipment, mainly used to measure the DC resistance of power transformers. It has also been widely used in the power industry. The measurement and discharge of the transformer DC resistance tester are commonly used functions and require the skilled operation of electric workers, but many people do not understand its measurement and discharge work. The following will introduce how to use the transformer DC resistance tester to measure and discharge the transformer DC resistance tester, as well as the precautions for using the transformer DC resistance tester.


Transformer DC Winding Resistance Tester.png


Measurement steps of transformer DC resistance tester:


1. After connecting the test line, turn off the power switch, turn on the power indicator, press the "Start and Stop" button, the meter head displays "E0000".


2. Select the resistance gear range according to the measured value, press the gear switch, the gear indicator light is on, and the stable value displayed on the four and a half LCD screens is the measured resistance value.


3. When reading the value, please pay attention to the unit within the selected range (mΩ/Ω/KΩ).


4. When measuring large inductance samples, such as power transformers, and other test circuits other than coils, there is no need to measure short circuits to avoid electromagnetic interference.


Transformer DC resistance tester discharge


After the test, directly cut off the main power supply. If during the test, the power supply should not be removed immediately after operation, the instrument should have a continuous discharge process, generally for at least 20 seconds, otherwise, the back electromotive force of the inductor will endanger personal safety.


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