Flash point thiab boiling point ntawm transformer roj
Txheem
General khoom thiab functions ntawm transformer roj
Cov roj yuav tsum muaj cov khoom nram qab no:
- Cov yam ntxwv zoo dielectric guaranteeing tsawg zog poob.
- High resistivity, uas txhim kho cov rwb thaiv tsev ntawm cov windings.
- High flash point thiab thermal stability kom txo tau evaporative poob.
- Lub neej ua haujlwm ntev thiab cov yam ntxwv zoo heev ntawm kev laus txawm tias muaj zog hluav taws xob.
- Qhov tsis muaj cov khoom hnyav hauv qhov muaj pes tsawg leeg (feem ntau yog sulfur), uas muab kev tiv thaiv corrosion.
Lub hom phiaj ntawm kev thov:
- Rwb thaiv tsev ntawm windings thiab lwm yam conductive qhov chaw ntawm lub transformer.
- Cooling ntawm transformer qhov chaw.
- Tiv thaiv oxidation ntawm cellulose los ntawm daim ntawv winding rwb thaiv tsev.
Muaj ob hom roj transformer: naphthenic thiab paraffinic. Qhov sib txawv ntawm lawv tau sau tseg hauv lub rooj:
| Cov khoom sib piv | Roj av roj | Paraffin yog ' |
| 1. | Tsawg paraffin / ciab cov ntsiab lus | Cov ntsiab lus siab paraffin/wax |
| 2. | Lub ncuav ntawm cov roj naphthenic qis dua li cov roj paraffin | Lub ncuav ntawm cov roj paraffin yog siab dua li cov roj naphthenic |
| 3. | Naphthenic roj oxidize yooj yim dua li cov roj paraffin. | Oxidation ntawm paraffin roj tsawg dua li ntawm naphthenic |
| 4. | Oxidation cov khoom yog cov roj soluble | Oxidation cov khoom yog insoluble hauv roj |
| 5. | Oxidation ntawm paraffin-raws li roj crude ua rau tsim ib qho insoluble precipitate uas tsub kom lub viscosity. Qhov no ua rau txo cov cua sov hloov, overheating thiab txo cov kev pab cuam lub neej. | Txawm hais tias cov roj naphthenic yog oxidized yooj yim dua li cov roj paraffin, cov khoom oxidation yog soluble hauv roj. |
| 6. | Cov roj Naphthenic muaj cov tshuaj tsw qab uas nyob hauv cov kua dej ntawm qhov kub qis mus rau -40 ° C | - |
Flash point ntawm transformer roj
Cov yam ntxwv no sawv cev rau qhov ntsuas kub tsawg kawg nkaus uas cov txheej txheem vaporization pib.
Lub luag haujlwm tseem ceeb ntawm cov roj transformer yog insulate thiab txias lub transformer. Cov roj no ruaj khov ntawm qhov kub thiab txias thiab muaj cov khoom siv hluav taws xob zoo heev. Tias yog vim li cas cov roj no tau siv hauv cov tshuab hloov pauv txhawm rau txhawm rau cais cov khoom tam sim no nyob rau hauv qhov hluav taws xob siab thiab kom txias rau lawv.
Yog tsis muaj load los yog unproductive load poob yuav ua rau kom qhov kub thiab txias ntawm transformer winding thiab rwb thaiv tsev nyob ib ncig ntawm lub winding. Qhov nce hauv roj kub yog vim kev tshem tawm cov cua sov los ntawm cov windings.
Yog hais tias lub flash point ntawm cov roj yog qis dua tus qauv, ces cov roj evaporates, tsim hydrocarbon gases nyob rau hauv lub transformer tank. Hauv qhov no, Buchholz relay feem ntau mus ncig. Nws yog cov cuab yeej tiv thaiv uas tau teeb tsa hauv ntau cov qauv tsim hluav taws xob hluav taws xob hloov hluav taws xob, qhov chaw muab cov roj tso rau sab nraud.
Qhov ib txwm flash point range rau transformer roj yog 135….145°C.
Boiling point ntawm transformer roj
Nws nyob ntawm cov tshuaj muaj pes tsawg leeg ntawm cov feem. Lub boiling point ntawm paraffin roj, ua los ntawm cov khoom ruaj khov mus rau qhov kub thiab txias, yog hais txog 530 ° C. Naphthenic roj boils ntawm 425 ° C.
Yog li, thaum xaiv qhov muaj pes tsawg leeg ntawm cov xov xwm txias, ib tug yuav tsum coj mus rau hauv tus account lub kev khiav hauj lwm tej yam kev mob ntawm lub transformer thiab nws cov yam ntxwv ntau lawm, ua ntej ntawm tag nrho cov, lub luag hauj lwm voj voog thiab lub hwj chim.
