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
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Code
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ZRS-10A
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ZRS-20A
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|
Output current
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Single-phase
|
1A,5A,10A, 20A
|
1A,5A,10A,20A,40A
|
|
3-phase
|
1A, 5A, 10A
|
1A, 5A, 10A, 20A
|
|
Measuring range
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Single-phase
|
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
|
|
3-phase
|
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)
|
|
Accuracy
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+/- 0.2%
|
|
Resolution ratio
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0.1μΩ
|
|
Working temperature
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0~40°
|
|
Relative humidity
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≤90%
|
|
Electric power
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AC220V,50Hz
|
|
Data storage
|
150 units
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Note: There are also single-phase winding resistance ohmmeters and dual-channel winding resistance ohmmeters.
