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Transformer winding resistance ohmmeter

Transformer winding resistance ohmmeter Transformer winding resistance ohmmeter
Product name:Transformer winding resistance ohmmeter

Description of winding resistance ohmmeter

This ZRS series transformer winding resistance ohmmeter is the newest instrument for measuring DC resistance of windings of big power transformers. It may measure three windings simultaneously!

There is auto-discharge circuit for operator safety.

For OLTC transformer, there don’t need discharge. Test duration is only one third of those by conventional single-phase DC meter.

It adopts large-size LCD displayer, graphical interface displaying.

It is equipped with built-in thermal printer and big-capacity storage.

It is portable, light weight, not more than 13kg!

Main parameters




Output current


1A,5A,10A, 20A



1A, 5A, 10A

1A, 5A, 10A, 20A

Measuring range


1A: 10mΩ~20Ω

5A: 1mΩ~4Ω

10A: 1mΩ~2Ω

20A: 1mΩ~1Ω

1A: 10mΩ~20Ω

5A: 1mΩ~4Ω

10A: 1mΩ~2Ω

20A: 1mΩ~1Ω

40A: 1mΩ~0.5Ω


1A: 10mΩ~6Ω (each phase)

5A: 1mΩ~1Ω (each phase)

10A: 1mΩ~0.6Ω (each phase)

1A: 10mΩ~6Ω (each phase)

5A: 1mΩ~1Ω (each phase)

10A: 1mΩ~0.6Ω (each phase)

20A: 1mΩ~0.3Ω (each phase)


+/- 0.2%

Resolution ratio


Working temperature


Relative humidity


Electric power


Data storage

150 units

Note: There are also single-phase winding resistance ohmmeters and dual-channel winding resistance ohmmeters.

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