Portable DC Winding Resistance Meter

• Customization: Available
• After-sales Service: 24/7 Online Service
• Warranty: 1 Year
• Model NO.: VS-3102A
• Display Type: Digital Only
• Certification: CE
• Customized: Customized
• Product Name: Handheld Winding Resistance Tester
• Current Output: 10 a
• Accuracy: ±0.2%
• Measuring Range: 200 μΩ to 50 KΩ
• Resolution: 0.0001 μΩ
• Environment Temperature: -10 ºC to 50 ºC
• Dimensions: 250 X 150 X 130 mm
• Working Power Supply: AC 220 V
• Transport Package: Wooden Box with Foam Inside
• Specification: VS-3102A: 10 A+Handheld+Insulating resin shell
• Trademark: WESHINE
• Origin: China Hebei
• HS Code: 9030332000
• Production Capacity: 500 Pieces/Per Month

Product Description

Product Description

Transformer insulation resistance deterioration is one of the most common causes of transformer failure: a failing transformer is a costly replacement in an electrical system with the potential for a long downtime. If you fail to maintain your transformer with regular insulation resistance testing (as can be carried out by the WESHINE Transformer Ohmmeter () of transformer test equipment) then it's likely to fail before reaching its maximum operating life.

By measuring a transformer's winding resistance from one HV transformer bushing to another, transformer resistance testing can reveal a great deal of information about the transformer. In addition to the obvious faulted transformer winding (i.e., an open winding or shorted turn), subtler problems can be detected. The DC current, in addition to flowing through the winding, also flows through the off-load ratio adjusting switch (DETC), the on-load ratio adjusting switch (on load tap changer or OLTC), as well as numerous welded and mechanical connections. Hence, the integrity of all these components can be verified with the use of transformer resistance test instruments. Applying DC test current through OLTC switches under transition (tap changes) validates proper make-before-break operation. From experience, it is known that the on load time changer has the greatest risk of misoperation as it operates within a transformer.

Transformer problems or faults occur due to poor design, assembly, handling, environmental damage, overloading or subpar maintenance. Measuring the resistance of the transformer windings ensures that the connections are correct and the resistance measurements indicate that there are no severe mismatches or opens. Most power transformers have taps built into them. These taps allow the ratio to be increased or decreased by fractions of a percent. Ratio changes involve a mechanical movement of a contact from one position to another, and a transformer tap changer test should also be undertaken during the transformer winding resistance test to validate proper operation.

FEATURES:

* Entry level Transformer Ohmmeter

* Insulating resin shell, lighter and better

* 200 μΩ to 50000 Ω

* Max 10 A current output

* ±0.2% measurement accuracy

* Back EMF protection function

* Multimeter type operation, intuitive and fast
 

PRODUCT INFORMATION
Product Name	HANDHELD WINDING RESISTANCE TESTER
Test Range	50 μΩ ~ 50 KΩ	Output Current	1 mA to 10 A
Power Supply	AC220 V	Accuracy	0.002
Resolution	0.0001 μΩ	Certificates	CE; EMC; LVD; ISO; IEC;
Dimensions	330 x 250 x 150 mm	OEM	Acceptable
Typical Application	Distribution transformer, reactors and instrument transformers.

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