GDZC Series Transformer Winding DC Resistance Tester, Mirco Ohmmeter
Product Description
GDZC Series
Transformer Winding DC Resistance Tester,Micro Ohmmeter
Introduction
GDZC Transformer Winding DC Resistance Tester is used for testing, installing and exchanging the semi-finished or finished transformer.
GDZC Transformer Winding Resistance Tester is also a necessity for power department to do preventive trials.
GDZC Transformer DC Resistance Tester can effectively help you to find disfigurements in the manufacturing of transformer, such as the winding choosing, welding, loose joints, missing shares and hidden danger in the running.
In order to meet the need of fast measurement of DC resistance, our company makes use of our technological advantage to develop the Micro Ohmmeter;
Features
GDZC Series Transformer Winding Resistance Tester is suitable for large-scale transformer above 240MVA in temperature rising tests.
Transformer Coil DC resistance measurement
Current Transformer(CT) Coil DC resistance measurement
Voltage Transformer(PT) Coil DC resistance measurement
Generator Stator Coil DC resistance measurement
After the measurement is completed, the detected coil is automatically discharged.
840MVA transformer low-voltage direct-resistance tester completed within 2 minutes and the data is stable and accurate.
Dual-channel shows the measurement data at the same time.
Each interval of 60 seconds automatically print data.
Equipped with temperature conversion software, curve waveforms.
You can also connection with PC to download the test results.
Specifications
| Item | GDZC-2A | GDZC-10A | GDZC-20A | GDZC-40A | GDZC-100A | GDZC-20S |
| Test current | 2A | 10A | 20A | 40A | 25A,50A, 100A | Single phase:1A,5A,10A,20A, 40A Three phase: 1A, 5A, 10A, 20A |
| Measuring range | 1μΩ~4.5kohm | 1μΩ~20ohm | 1μΩ~10ohm | 1μΩ~10ohm | 50μΩ-200mΩ(100A)
100μΩ-400 mΩ(50A)
200μΩ-800 mΩ(25A) | Single phase: 10mΩ～20Ω(1A) 1 mΩ～4Ω(5A) 1 mΩ～2Ω(10A) 1 mΩ～1Ω(20A) 1 mΩ～0.5Ω(40A)
Three-phase: 10 mΩ～6Ω (1A,each phase) 1 mΩ～1Ω (5A,each phase ) 1 mΩ～0.6Ω (10A,each phase ) 1 mΩ～0.3Ω (20A,each phase ) |
| Resolution | 1μΩ | |||||
| Max. Error | 0.2%RDG+2D | |||||
| Voltage output | 20V | |||||
| Power supply | AC220V±10%%, 50Hz/60Hz | |||||
| Working environment | -10℃-+40℃ RH≤85% | |||||
Wiring Diagram
Connect the ground pillar to the earth firmly, and then connect the power wire and the test wires, the U+ is inside of the I+, and U- is inside of the I-.
1) Test the the resistance of Y mode transformer:
2) Test the the resistance of D mode transformer. The test value RBC is not the resistance of winding BC, you need test RAB ,RBC, then calculate RBC which is the real resistance of winding BC. RBC= M/N;
M = 2 *（RABRAC+RABRBC+RBCRAC）-（RAB2+RBC2-RBC2）
N = 2 *（RAB+RBC-RBC）
3) Test the the resistance of Z mode transformer:
Spare Parts
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Contact Us
Contact Person: Christine Gou
Whatsapp/Wechat: +86 15123029885
Mobile: +86 15123029885
E-mail: gold05@hy-industry.com