SU60469A1 - Pulse Testing Device with Cathode Oscilloscope - Google Patents
Pulse Testing Device with Cathode OscilloscopeInfo
- Publication number
- SU60469A1 SU60469A1 SU29970A SU29970A SU60469A1 SU 60469 A1 SU60469 A1 SU 60469A1 SU 29970 A SU29970 A SU 29970A SU 29970 A SU29970 A SU 29970A SU 60469 A1 SU60469 A1 SU 60469A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- transformer
- damage
- testing device
- pulse testing
- cathode oscilloscope
- Prior art date
Links
- 238000009413 insulation Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
Description
Импульсные испытани трансформаторов ввод тс в насто щее врем в качестве одного из элементов об зательных типовых испытаний. Основной трудностью испытаний вл етс отсутствие четких признаков новреждений трансформатора. Наблюдение за выделением пузырей и дыма на поверхности масла не вл етс достаточно надежным способом установлени наличи повреждений в трансформаторе, так как пузыри могут по вл тьс не только в результате повреждений, и, наоборот , повреждение при испытании может не сопровождатьс выделением пузырей. Поэтому одним из надежных методов определени повреждений обмоток трансформаторов считаетс полна размотка трансформатора , так как внешний осмотр обмотки после испытани обычно совершенно не обнаруживает повреждений . Кроме того, установить повреждение при размотке бывает в некоторых случа х затруднительно из-за незаметности следов прожога изол ции.Pulsed testing of transformers is currently being introduced as one of the elements of the required type tests. The main difficulty of testing is the lack of clear signs of transformer damage. Observing the release of bubbles and smoke on the surface of the oil is not a sufficiently reliable method for determining the presence of damage in a transformer, since bubbles may appear not only as a result of damage, and, conversely, damage during testing may not be accompanied by the release of bubbles. Therefore, one of the reliable methods for detecting damage to transformer windings is considered to be full unwinding of the transformer, since external inspection of the winding after testing usually does not detect damage at all. In addition, it is difficult in some cases to establish damage during unwinding due to the inconspicuous traces of burnout insulation.
Такой способ определени повреждений , помимо своей неэкономичности , не может быть отнесен к типовым способам испытаний трансформаторов , потому что трансформаторы , выдержавшие испытание.This method of damage detection, in addition to its inefficiency, cannot be attributed to the standard test methods for transformers, because the transformers that have passed the test.
должны быть отправлены в зксплоатацию .must be sent into operation.
Показателем повреждени изол ции трансформатора в некоторых случа х может вл тьс осциллограмма волны импульса, подаваемого на трансформатор. Однако искажение линейного импульсного напр жени может иметь место только при пробое главной изол ции, причем только вблизи или непосредственно у линейного конца. Между тем, при импульсном испытании в основном повреждаетс междукатушечна изол ци трансформатора. Эти повреждени обычно не вызывают никаких изменений формы линейного потенциала обмотки.An indicator of damage to the isolation of a transformer in some cases can be an oscillogram of a pulse wave applied to a transformer. However, the distortion of the linear impulse voltage can occur only during the breakdown of the main insulation, and only near or directly at the linear end. Meanwhile, during pulse testing, the coil insulation of the transformer is mainly damaged. These damages usually do not cause any changes in the shape of the linear potential of the winding.
Предметом насто щего авторского свидетельства вл етс приспособление дл регистрации повреждений обмоток трансформаторов при импульсных испытани х с помощью катодного осциллографа, включенного через емкостный делитель напр жени .The subject of this author's certificate is a device for registering damage to transformer windings during impulse testing using a cathode oscilloscope connected through a capacitive voltage divider.
Оэгласно изобретению, внутри кожуха исследуемого трансформатора располагаетс металлическа пластина , изолированна от кожуха. Она расположена вдоль обмотки трансформатора в создаваемом ею электрическом поле. Последнее распредел етс неравномерно вдоль обмот229According to the invention, a metal plate located inside the casing of the transformer under study is insulated from the casing. It is located along the transformer winding in the electric field created by it. The latter is distributed unevenly along the winding229
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU60469A1 true SU60469A1 (en) | 1941-06-30 |
Family
ID=
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