High Quality 20A DC Resistance Tester Digital 3 Channel Direct Current Transformer Winding Resistance Tester

• After-sales Service: 7*24 Online Service
• Warranty: 1 Year
• Accuracy Grade: 0.002
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: VS-3320A
• Display: Digital
• Weight: 12 Kg
• Product Name: Automated Six-Winding Transformer Ohmmeter
• Measuring Range: 500 μΩ ~ 200 Ω
• Current Output: 50 Ma to 40 a
• Resolution: 0.0001 μΩ
• Accuracy: ±0.2%
• Operating Temperature: -10ºC~50ºC
• Dimensions: 370 mm * 260 mm * 190 mm
• Certification: CE, EMC, LVD, ISO
• Back-Emf Protection Function: Automatic Saturation Magnetic Circuit Method
• Transport Package: Wooden Box with Foam Inside
• Specification: 10 to 40 A + 500 μ Ω to 200 Ω
• Trademark: WESHINE
• Origin: Hebei, China
• HS Code: 9030332000
• Production Capacity: 2000 Pieces
• Package Size: 50.00cm * 50.00cm * 50.00cm
• Package Gross Weight: 50.000kg

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.

PRODUCT INFORMATION
Product Name	AUTOMATED SIX-WINDING DC RESISTANCE TESTER
Test Range	1 mΩ ~ 400 Ω	Output Current	20 A
Power Supply	AC220V	Accuracy	0.2%
Resolution	0.0001μΩ	Certificates	CE; EMC; LVD; ISO; IEC;
Dimensions	370mm*263mm*190mm	Model Number	VS-3320A

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