Flash point uye yekubikira poindi yemafuta etransformer
Zviri mukati
General zvivakwa uye mabasa emafuta etransformer
Oiri inofanira kuva nezvinhu zvinotevera:
- Yakanakisa dielectric maitiro anovimbisa kushoma simba kurasikirwa.
- High resistivity, iyo inovandudza kusungirirwa pakati pemhepo.
- High flash point uye thermal kugadzikana kudzikisa kurasikirwa kwe evaporative.
- Hupenyu hurefu hwebasa uye hunhu hwakanaka hwekuchembera kunyangwe pasi pemitoro yakasimba yemagetsi.
- Kusavapo kwezvikamu zvehasha mukuumbwa (kunyanya sulfuri), iyo inopa dziviriro kubva pakuora.
Zvinangwa zvekushandisa:
- Insulation pakati pe windings uye zvimwe conductive zvikamu zve transformer.
- Kutonhora kwezvikamu zve transformer.
- Kudzivirirwa kweiyo oxidation ye cellulose kubva pabepa rinopepeta insulation.
Kune marudzi maviri emafuta ekushandura: naphthenic uye paraffinic. Misiyano pakati pavo inopfupikiswa mutafura:
| Zvinhu zvekuenzanisa | Naphthenic mafuta | Parafini mafuta |
| 1. | Parafini/wakisi yakaderera | Parafini/wakisi yakakwirira |
| 2. | Iyo yekudira poindi yemafuta naphthenic yakaderera pane iyo yemafuta eparafini | Iyo yekudira poindi yemafuta eparafini yakakwirira kupfuura iyo naphthenic mafuta |
| 3. | Mafuta eNaphthenic oxidize zviri nyore kupfuura mafuta eparafini. | Oxidation yemafuta eparafini ishoma pane iyo naphthenic |
| 4. | Oxidation zvigadzirwa zvinonyungudika nemafuta | Oxidation zvigadzirwa hazvinyunguriki mumafuta |
| 5. | Oxidation yeparafini yakavakirwa crude oiri inokonzeresa kuumbwa kweinonyungudika precipitate iyo inowedzera viscosity. Izvi zvinotungamira mukuderedzwa kwekutamisa kupisa, kupisa uye kuderedzwa kwehupenyu hwebasa. | Kunyangwe maoiri e naphthenic ari nyore oxidized kupfuura mafuta eparafini, oxidation zvigadzirwa zvinonyungudika mumafuta. |
| 6. | Mafuta eNaphthenic ane zvinhu zvinonhuhwirira zvinoramba zvakaita mvura pane tembiricha yakadzikira kusvika -40°C | - |
Flash point yemafuta etransformer
Chimiro ichi chinomiririra tembiricha shoma panotangira iyo vaporization process.
Iwo makuru mabasa emafuta etransformer ndeye kuvharira uye kutonhorera iyo transformer. Oiri iyi yakatsiga pakudziya kwepamusoro uye ine yakanakisa yemagetsi insulating properties. Ndicho chikonzero mafuta akadaro anoshandiswa mumashanduri kuitira kuti aparadzanise zvikamu zvinotakura zvino pasi pemhepo yakakwirira uye kuti zvitonhodze.
Kusavapo kwemutoro kana kurasikirwa kwayo kusingabereki kunowedzera kutonhora kweiyo transformer winding uye insulation yakatenderedza mhepo. Kuwedzera kwekushisa kwemafuta kunokonzerwa nekubviswa kwekupisa kubva kumhepo.
Kana iyo flash point yeoiri iri pazasi peyero, ipapo chigadzirwa chemafuta chinoputika, chichigadzira magasi ehydrocarbon mukati megasi retransformer. Muchiitiko ichi, Buchholz relay inowanzofamba. Icho chidziviriro chekudzivirira icho chakaiswa mune dzakawanda magadzirirwo emagetsi emagetsi emagetsi emagetsi, uko kunze kwemafuta emafuta anopiwa.
Iyo yakajairika flash point range yemafuta etransformer i135….145°C.
Boiling point yemafuta etransformer
Zvinoenderana nemakemikari ezvikamu. Nzvimbo yekuvira yemafuta eparafini, yakagadzirwa kubva muzvikamu zvakatsiga kusvika kune tembiricha yepamusoro, ingangoita 530°C. Mafuta eNaphthenic anovira pa425°C.
Nokudaro, pakusarudza kuumbwa kwemhepo inotonhorera, munhu anofanirwa kufunga nezvekushanda kwemamiriro ekushandura uye maitiro ayo ekugadzira, kutanga kune zvose, basa rekutenderera uye simba.
