Overview
The measurement of transformer DC resistance is a must-measure item in transformer manufacturing, outgoing tests of semi-finished products and finished products, installation handover tests, and preventive tests of power departments. It can effectively detect manufacturing defects such as material selection, welding, and loose connection parts, missing strands, and broken wires of coils, as well as hidden dangers that exist after operation. The MEZRC-III (20A) three-channel DC resistance tester is a quick testing device for the DC resistance of transformer, mutual inductor, generator, and motor windings. It is especially suitable for simultaneous three-phase measurement of large capacity star connected transformers, which saves time and improves maintenance efficiency.
Three-phase simultaneous measurement is possible for transformers with neutral points, greatly saving measurement time.
The instrument has a demagnetization, which can eliminate residual magnetism at one time.
The instrument has a wide range of resistance measurement and high resolution, with multiple current gear options.
The instrument a perfect back-EMF protection function.
Longitudinal testing of the DC resistance of a transformer with load tap changer can be completed at one time.
The has high measurement accuracy and features anti-interference, shock resistance, and portability.
A 5.0-inch 65K color touch screen is used easy operation.
Built-in large capacity non-volatile memory can store 500 sets of data.
Built-in high-speed micro thermal printer can measurement data.
Built-in high-precision clock displays real-time time.
USB storage function.
Three-phase test :
|
Test current |
Test scope |
Accuracy |
|
10 A + 10 A (2 * 10) |
500 μΩ ~ 0.5 Ω |
± (0.2% of reading + 1.0 μΩ) |
|
5 A + 5 A (2*5) |
1mΩ ~ 1Ω |
± (0.2% of the reading + 0.01 mΩ) |
|
1 A + 1 A (2*1) |
50 mΩ ~ 10 Ω |
± (0.2% of the reading + 0.1 mΩ) |
|
0.1A + 0.1A ( 2 * 0.1 ) |
500 mΩ ~ 50 Ω |
± (0.2% of the reading + 0.001Ω) |
Single- phase test :
|
Test current |
Test scope |
Accuracy |
|
20A |
250 μΩ ~ 1.0Ω |
± (0.2% reading + 0.5 μΩ) |
|
10A |
500 μΩ ~ 2.0Ω |
± (0.2% of the reading + 0.002 mΩ) |
|
5A |
10 mΩ ~ 4.0 Ω |
± (0.2% of the reading + 0.05 mΩ) |
|
1 A |
50 mΩ ~ 20 Ω |
± (0.2% of the reading + 0.1 mΩ ) |
|
0.1A |
500 mΩ ～200 Ω |
± (0.2% of the reading + 0.001Ω) |
Resolution: 0.0001 μΩ , 5 significant digits
Main unit dimensions: 420mm × 250mm × 340mm
Main unit weight: 15kg
2. Usage conditions
Ambient temperature: -10℃ to 50℃
Ambient humidity: ≤85% RH, non-condensing
Operating power supply: AC220V ±10%
We provide you with free consultation services
Engineers provide guidance for installation and commissioning
Technicians can provide on-site maintenance services and receive regular training
Perfect technical consulting service system
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Contact Us
Address: China Optics Valley No. 1, Fenghuangyuan 2nd Road, Donghu High-tech Development Zone, Wuhan City
whmoen@163.com
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15997412136
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400-017-7185
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