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DC Resistance Meter

DC Resistance Meter DC Resistance Meter DC Resistance Meter DC Resistance Meter
Product name:DC Resistance Meter
Item:6-5
Details:
 

Description

DC resistance test on transformer windings is one of the indispensible test items when taking-over, finishing overhauling and changing tap switch.

This instrument is for quick measuring DC resistance of transformer windings, motor windings, reactor windings, arc-extinguishing coils, etc., as substitution for Wheatstone bridge and Kelvin bridge. It can check welding quality, short-circuit, damages of winding joints, outgoing wire errors, condition of tap switches, etc.

This meter has wide measuring range, can measure DC resistance of PT. Measuring speed is very quick, e.g., it will take only one minute for measuring 110kV/50MVA power transformer. The discharging speed is also very quick, usually not more than few seconds.

Main features

l  Quickly establish test current, speed is hundred times more than bridge type and test repeatability is very good.

l  Built-in discharging circuit can discharge in few seconds, dynamically displaying discharging condition for ensuring safety

l  High stability, even under severe interference, the last reading number can be fixed.

l  Complete protecting functions, reliable.

l  Large measuring range, for different kind of transformers

l  Adopts high-frequency switch power, light weight, simple operation

Main parameters

Code

ZRC-2A

ZRC-5A

ZRC-10A

ZRC-20A

ZRC-40A

Output current

2mA,20mA,

200mA,2A

5mA,50mA,

500mA,5A

50mA,500mA,5A,10A

2.5A,5A,10A,20A

5A,10A,20A,40A

Measuring range

1mΩ~2000mΩ

1mΩ~2000mΩ

1mΩ~200mΩ

100μΩ~10Ω

100μΩ~5Ω

Accuracy

0.2%

Resolution ratio

0.1μΩ

Working temperature

0~40°

Relative humidity

≤90%

Electric power

AC220V,50Hz

 

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