{"id":225,"date":"2022-03-25T03:32:42","date_gmt":"2022-03-25T03:32:42","guid":{"rendered":"https:\/\/www.voltage-tester.com\/?p=225"},"modified":"2025-04-24T02:16:23","modified_gmt":"2025-04-24T02:16:23","slug":"how-do-you-test-the-winding-resistance-of-a-transformer","status":"publish","type":"post","link":"https:\/\/www.voltage-tester.com\/id\/how-do-you-test-the-winding-resistance-of-a-transformer-article\/","title":{"rendered":"How do you test the winding resistance of a transformer"},"content":{"rendered":"

\u2160: How do you test the winding resistance of a transformer?<\/strong><\/p>\n\n\n\n

Transformer winding resistance<\/strong> measurements are obtained by passing a known DC current through the winding under test and measuring the voltage drop across each terminal (Ohm’s Law).<\/p>\n\n\n\n

Winding resistance in transformers will change due to shorted turns, loose connections, or deteriorating contacts in tap changers. Regardless of the configuration, the resistance measurements are normally made phase-to-phase and the readings are compared with each other to determine if they are acceptable.<\/p>\n\n\n\n

\u2161: Which method is used to measure resistance of winding?<\/strong><\/p>\n\n\n\n

The windings resistance can be directly measured with an ohmmeter. Another method is to calculate the resistance by measuring the current trough every winding, using an ammeter A, when a voltage is applied and measured with a voltmeter V.<\/p>\n\n\n\n

\u2163: Parameters of the DCR tester\/winding resistance tester\uff1a<\/strong><\/p>\n\n\n\n

Item<\/td>Parameter<\/td>inaccuracy<\/td><\/tr>
Test current<\/td>AUTO\u3001<20mA\u300140mA\u3001<\/td> <\/td><\/tr>
200mA\u30011A\u30015A\u300110A<\/td><\/tr>
Range<\/td>0.5m\u03a9~0.8\u03a9 (10A)<\/td>\u00b1(0.2%+2digit)<\/td><\/tr>
1m\u03a9-4\u03a9 (5 A)<\/td><\/tr>
5m\u03a9-20\u03a9 ( 1 A)<\/td><\/tr>
100m\u03a9-100\u03a9 (200mA)<\/td><\/tr>
1\u03a9-500\u03a9 (40mA)<\/td><\/tr>
100\u03a9-100K\u03a9 (<20mA)<\/td>\u00b1(0.5%+2digit)<\/td><\/tr>
Best Resolution<\/td>0.1\u03bc\u03a9<\/td><\/tr>
Display<\/td>7-inch color LCD touch screen<\/td>4 effective digits Resistance display<\/td><\/tr>
Data Storage<\/td>1000 sets<\/td><\/tr>
Operating Temperature<\/td>0\u2103~40\u2103<\/td><\/tr>
Relative Humidity<\/td><90%RH,non-condensing<\/td><\/tr>
Power supply<\/td>AC 220V\u00b110V,50Hz\u00b11 Hz<\/td>Fuse 2A<\/td><\/tr>
Max Power<\/td>200W<\/td><\/tr>
Dimension<\/td>360*290*170(mm)<\/td><\/tr>
Weight<\/td>Instrument box:6 KG<\/td>wire box:5 KG<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Here are some pictures when using:<\/strong><\/p>\n\n\n

\n
\"How<\/figure><\/div>\n\n
\n
\"How<\/figure><\/div>\n\n
\n
\"How<\/figure><\/div>","protected":false},"excerpt":{"rendered":"

\u2160: How do you test the winding resistance of a transformer? Transformer winding resistance measurements are obtained by passing a known DC current through the winding under test and measuring the voltage drop across each terminal (Ohm’s Law). Winding resistance in transformers will change due to shorted turns, loose connections, or deteriorating contacts in tap changers. Regardless of […]<\/p>","protected":false},"author":1,"featured_media":237,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[772],"tags":[],"class_list":["post-225","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"yoast_head":"\nHow do you test the winding resistance of a transformer - Run Test Electric Manufacturing Co., Ltd.<\/title>\n<meta name=\"description\" content=\"China transformer test supplier, we provide Relay Protection Test, Resistance test, Circuit Breaker Test, and Partial Discharge Test for you with good price.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.voltage-tester.com\/id\/how-do-you-test-the-winding-resistance-of-a-transformer-article\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How do you test the winding resistance of a transformer - 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