Sebaka sa Flash le ntlha e belang ea oli ea transformer
Tse ka hare
Lintho tse akaretsang le mesebetsi ea oli ea transformer
Oli e tlameha ho ba le lintho tse latelang:
- Litšobotsi tse ntle tsa dielectric tse netefatsang tahlehelo e nyane ea matla.
- High resistivity, e leng ho ntlafatsa insulation pakeng tsa windings.
- Sebaka se phahameng sa flash le botsitso ba mocheso ho fokotsa tahlehelo ea mouoane.
- Bophelo bo bolelele ba tšebeletso le litšobotsi tse babatsehang tsa botsofali esita le tlas'a meroalo e matla ea motlakase.
- Ho ba sieo ha likarolo tse mabifi sebopeho (haholo-holo sebabole), se fanang ka tšireletso khahlanong le kutu.
Sepheo sa kopo:
- Insulation pakeng tsa windings le likarolo tse ling conductive tsa transformer.
- Ho pholile ha likarolo tsa transformer.
- Thibelo ea oxidation ea selulose ho tloha pampiring e kenang ka har'a sekoaelo.
Ho na le mefuta e 'meli ea oli ea transformer: naphthenic le paraffinic. Liphapang lipakeng tsa tsona li akaretsoa tafoleng:
| Lintho tsa ho bapisa | Oli ea peterole | Oli ea parafine |
| 1. | Likahare tse tlase tsa parafine/ boka | Lintho tse ngata tsa parafine/ boka |
| 2. | Thela ea oli ea naphthenic e tlase ho feta ea oli ea parafine | Thela ea oli ea parafine e phahame ho feta ea oli ea naphthenic |
| 3. | Oli ea Naphthenic e na le oxidize habonolo ho feta oli ea parafine. | Oxidation ea oli ea parafine e nyane ho feta ea naphthenic |
| 4. | Lihlahisoa tsa oxidation li qhibiliha ka oli | Lihlahisoa tsa oxidation ha li qhibilihe ka har'a oli |
| 5. | Oxidation ea oli e tala e thehiloeng ho parafine e etsa hore ho thehoe moholi o sa qhibiliheng o eketsang viscosity. Sena se lebisa ho fokotsa ho fetisoa ha mocheso, ho chesa haholo le ho fokotsa bophelo ba tšebeletso. | Leha oli ea naphthenic e na le oxidized habonolo ho feta oli ea parafine, lihlahisoa tsa oxidation li qhibiliha ka har'a oli. |
| 6. | Oli ea Naphthenic e na le metsoako e nkhang hamonate e lulang e le mokelikeli mochesong o batlang o le tlase ho fihlela ho -40°C | - |
Ntlha ea flash ea oli ea transformer
Tšobotsi ena e emela bonyane mocheso oo mokhoa oa vaporization o qalang ho oona.
Mesebetsi e ka sehloohong ea oli ea transfoma ke ho insulate le ho pholisa transformer. Oli ena e tsitsitse mochesong o phahameng 'me e na le thepa e babatsehang ea ho thibela motlakase. Ke ka lebaka leo oli e joalo e sebelisoang ho li-transformer e le ho arola likarolo tse tsamaisang hona joale tlas'a motlakase o phahameng le ho li pholile.
Ho ba sieo ha mojaro kapa tahlehelo ea moroalo e sa hlahiseng litholoana ho atisa ho eketsa mocheso oa moea oa motlakase oa transformer le ho pota-pota ho pota-pota. Ho eketseha ha mocheso oa oli ho bakoa ke ho tlosoa ha mocheso ho tloha mapheong.
Haeba ntlha ea khanya ea oli e ka tlase ho tekanyo, joale oli e fetoha mouoane, e etsa likhase tsa hydrocarbon ka har'a tanka ea transformer. Tabeng ena, Buchholz relay hangata e tsamaea. Ke sesebelisoa se sireletsang se kentsoeng meralong e mengata ea li-transformer tsa motlakase oa matla, moo ho fanoang ka letamo la oli le kantle.
Sebaka se tloaelehileng sa li-flash point bakeng sa oli ea transformer ke 135….145°C.
Sebaka se belang sa oli ea transformer
E itšetlehile ka metsoako ea lik'hemik'hale ea likaroloana. Sebaka se belang sa oli ea parafine, se entsoeng ka likarolo tse tsitsitseng ho isa mocheso o phahameng, se ka bang 530°C. Oli ea Naphthenic e bela ka 425°C.
Kahoo, ha u khetha ho hlophisoa ha mecha ea litaba e pholileng, motho o lokela ho ela hloko maemo a ts'ebetso ea transformer le litšobotsi tsa eona tsa tlhahiso, pele ho tsohle, potoloho ea mosebetsi le matla.
