Flash point ndi kuwira kwamafuta a transformer
Zamkatimu
General katundu ndi ntchito mafuta thiransifoma mafuta
Mafuta ayenera kukhala ndi zinthu zotsatirazi:
- Makhalidwe abwino kwambiri a dielectric amatsimikizira kutayika kwa mphamvu pang'ono.
- High resistivity, amene bwino kutchinjiriza pakati windings.
- High flash point ndi kukhazikika kwa kutentha kuti muchepetse kutaya kwa evaporative.
- Moyo wautali wautumiki ndi makhalidwe abwino okalamba ngakhale pansi pa katundu wamphamvu wamagetsi.
- Kusowa kwa zigawo zaukali pakupanga (makamaka sulfure), zomwe zimapereka chitetezo ku dzimbiri.
Zolinga zamagwiritsidwe:
- Kutsekereza pakati pa windings ndi mbali zina zoyendetsa za thiransifoma.
- Kuziziritsa kwa magawo a transformer.
- Kupewa makutidwe ndi okosijeni a cellulose kuchokera ku zotsekera zomata pamapepala.
Pali mitundu iwiri ya mafuta osinthira: naphthenic ndi paraffinic. Kusiyana pakati pawo kukufupikitsidwa patebulo:
| Zinthu zofananira | Mafuta a Naphthenic | Mafuta a parafini |
| 1. | Kuchepa kwa parafini / sera | Kuchuluka kwa parafini / sera |
| 2. | Kutsanulira mafuta a naphthenic ndi otsika kuposa mafuta a parafini | Kutsanulira mafuta a parafini ndiapamwamba kuposa mafuta a naphthenic |
| 3. | Mafuta a Naphthenic oxidize mosavuta kuposa mafuta a parafini. | Oxidation ya mafuta a parafini ndi yochepa kuposa ya naphthenic |
| 4. | Zinthu za oxidation ndizosungunuka mafuta | Zinthu za oxidation sizisungunuka mumafuta |
| 5. | Oxidation ya mafuta opangidwa ndi parafini imapangitsa kuti pakhale mpweya wosasunthika womwe umawonjezera kukhuthala. Izi zimabweretsa kuchepa kwa kutentha, kutentha kwambiri komanso kuchepa kwa moyo wautumiki. | Ngakhale mafuta a naphthenic ndi oxidized mosavuta kuposa mafuta a parafini, zinthu zotulutsa okosijeni zimasungunuka mumafuta. |
| 6. | Mafuta a Naphthenic amakhala ndi zinthu zonunkhira zomwe zimakhala zamadzimadzi pakatentha kwambiri mpaka -40 ° C | - |
Flash point ya mafuta a transfoma
Khalidwe limeneli limaimira kutentha kochepa kumene ndondomeko ya vaporization imayamba.
Ntchito zazikulu zamafuta a transformer ndikutsekereza ndikuziziritsa thiransifoma. Mafutawa amakhala osasunthika pakatentha kwambiri ndipo ali ndi zida zabwino kwambiri zotsekera magetsi. Ichi ndichifukwa chake mafuta oterowo amagwiritsidwa ntchito mu thiransifoma kuti azipatula zida zonyamulira masiku ano pansi pa voteji yayikulu ndikuziziritsa.
Kusakhalapo kwa katundu kapena kutayika kwake kosabereka kumapangitsa kuti kutentha kwa thiransifoma kumangoyenda komanso kutsekeka mozungulira kuzungulirako. Kuwonjezeka kwa kutentha kwa mafuta kumachitika chifukwa cha kuchotsedwa kwa kutentha kwa ma windings.
Ngati kung'anima kwa mafuta kuli pansi pa muyezo, ndiye kuti mafutawo amasanduka nthunzi, ndikupanga mpweya wa hydrocarbon mkati mwa thanki ya thiransifoma. Pankhaniyi, Buchholz relay nthawi zambiri imayenda. Ndi chipangizo chotetezera chomwe chimayikidwa m'mapangidwe ambiri a magetsi opangira magetsi, kumene malo osungiramo mafuta akunja amaperekedwa.
Mafuta a transfoma wanthawi zonse ndi 135….145°C.
Malo otentha a mafuta a transformer
Zimatengera kapangidwe ka mankhwala a tizigawo ting'onoting'ono. Malo otentha a mafuta a parafini, opangidwa kuchokera ku zigawo zokhazikika mpaka kutentha kwambiri, ndi pafupifupi 530 ° C. Mafuta a Naphthenic amawira pa 425 ° C.
Chifukwa chake, posankha kapangidwe kazinthu zoziziritsa kukhosi, munthu ayenera kuganizira momwe magwiridwe antchito a thiransifoma ndi mawonekedwe ake opangira, choyamba, kuzungulira kwa ntchito ndi mphamvu.
