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Measurement of DC Resistance Tester

time:2019/12/18   source:Huatian Electric Power  reading:1331 time

Transformer DC resistance tester is a kind of high voltage electrical testing equipment, mainly used to measure the dc resistance of power transformers. It is also widely used in the power industry, but many people do not understand its measurement and discharge work. Therefore, this paper introduces how to use the transformer dc resistance tester to measure and discharge the transformer dc resistance tester.

Transformer DC resistance tester measurement.

After connecting the test line, turn off the power switch, turn on the power indicator, press the "start and stop" button, and the header will display "E0000". Select the range of the resistance gear according to the measured value, press the switch of the lower gear, the indicator light of the gear is on, and the stability value displayed on the four and a half LCD screens is the measured resistance value. Read the value, please note that the selected within the scope of the unit (mΩ/Ω/KΩ). When measuring large inductance samples, such as power transformers, other coils outside the test circuit, it is not necessary to measure the short circuit best to avoid electromagnetic interference.

Transformer DC resistance tester discharge

After the test, cut off the main power directly. If the power supply should not be removed immediately after operation in the perception test, the instrument should have a continuous discharge process, usually at least 20 seconds of discharge, otherwise the inductive counter electromotive force will endanger personal safety.


Transformer DC resistance tester measurement and discharge is a common function, the need for skilled operation of electric workers.

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