Sulfur Hexafluoride (SF6) Circuit Breaker

Chombo chozungulira chomwe SF6 pansi pa mpweya wopanikizika chimagwiritsidwa ntchito kuzimitsa arc amatchedwa SF6 circuit breaker. Mpweya wa SF6 (sulphur hexafluoride) uli ndi dielectric, arc quenching, mankhwala ndi zinthu zina zakuthupi zomwe zatsimikizira kupambana kwake kuposa njira zina zozimitsira arc monga mafuta kapena mpweya. The SF6 circuit breaker imagawidwa m'magulu atatu:

• Non-puffer piston circuit breaker
• Single-puffer piston circuit breaker.
• Chowotcha pisitoni chawiri-puffer.

Wowononga dera yemwe amagwiritsa ntchito mpweya ndi mafuta ngati njira yotsekera, mphamvu yawo yozimitsa ya arc imamangirira pang'onopang'ono pambuyo pa kuyenda kwa kupatukana. Pankhani yamagetsi othamanga kwambiri omwe amatha kutha mwachangu arc amagwiritsidwa ntchito omwe amafunikira nthawi yocheperako kuti achire mwachangu, magetsi amawonjezeka. SF6 ophwanya ma circuit ali ndi katundu wabwino pankhaniyi poyerekeza ndi mafuta kapena mpweya wophulika. Chifukwa chake pamagetsi okwera mpaka 760 kV, ma SF6 ophwanya ma circuit amagwiritsidwa ntchito.

Katundu wa Sulfur hexafluoride Circuit Breaker

Sulfur hexafluoride ili ndi zotchingira zabwino kwambiri komanso zozimitsa arc. Zinthu izi ndi

• Ndi gasi wopanda mtundu, wopanda fungo, wopanda poizoni komanso wosapsa.
• Mpweya wa SF6 ndi wokhazikika komanso wosakhazikika, ndipo kachulukidwe kake ndi kasanu kuposa mpweya.
• Imakhala ndi matenthedwe apamwamba kwambiri kuposa mpweya ndipo imathandizira kuziziritsa kwapano komwe kumanyamula.
• SF6 mpweya kwambiri electronegative, kutanthauza ma elekitironi ufulu mosavuta kuchotsedwa kumaliseche ndi mapangidwe ayoni zoipa.
• Ili ndi malo apadera ophatikizanso mwachangu pambuyo pochotsa gwero lopatsa mphamvu. Ndiwothandiza kwambiri kuwirikiza ka 100 poyerekeza ndi arc quenching medium.
• Mphamvu yake ya dielectric ndi nthawi 2.5 kuposa ya mpweya ndi 30% yocheperapo kuposa mafuta a dielectric. Pakuthamanga kwambiri mphamvu ya dielectric ya gasi imawonjezeka.
• Chinyezi ndi chovulaza kwambiri kwa SF6 circuit breaker. Chifukwa cha kuphatikiza kwa chinyezi ndi mpweya wa SF6, hydrogen fluoride imapangidwa (pamene arc imasokonekera) yomwe imatha kuukira mbali za owononga dera.

Kupanga kwa SF6 Circuit Breakers

SF6 zowononga dera makamaka zimakhala ndi magawo awiri, omwe ndi (a) chosokoneza ndi (b) mpweya.

Interrupter Unit - Chigawochi chimakhala ndi zolumikizira zosunthika komanso zosasunthika zomwe zimakhala ndi zida zonyamula pakali pano komanso kafukufuku woyeserera. Imalumikizidwa ku nkhokwe ya gasi ya SF6. Chigawochi chimakhala ndi ma slide olowera omwe amalola kuti mpweya wothamanga kwambiri ulowe mu thanki yayikulu.

Gasi System - Makina otsekedwa a gasi amagwiritsidwa ntchito mu SF6 ophwanya ma circuit. Gasi wa SF6 ndi wokwera mtengo, choncho amabwezeredwa pambuyo pa ntchito iliyonse. Chigawochi chimakhala ndi zipinda zotsika komanso zotsika kwambiri zokhala ndi alamu yotsika komanso ma switch ochenjeza. Pamene kupanikizika kwa mpweya kumakhala kochepa kwambiri chifukwa cha mphamvu ya dielectric ya mpweya imachepa ndipo mphamvu ya arc quenching ya osweka ili pangozi, ndiye kuti dongosololi limapereka chenjezo.

Mfundo Yogwira Ntchito ya SF6 Circuit Breaker

Muzochitika zogwirira ntchito, zolumikizana ndi wosweka zimatsekedwa. Cholakwika chikachitika m'dongosolo, zolumikizira zimakokedwa, ndipo arc imakanthidwa pakati pawo. Kusamutsidwa kwa ogwirizanitsa osuntha kumagwirizanitsidwa ndi valavu yomwe imalowa mu mpweya wothamanga kwambiri wa SF6 mu chipinda chosokoneza cha arc pamtunda wa 16kg / cm ^ 2.

Mpweya wa SF6 umatenga ma elekitironi aulere munjira ya arc ndikupanga ma ion omwe sakhala ngati chonyamulira. Ma ion awa amawonjezera mphamvu ya dielectric ya gasi ndipo motero arc imazimitsidwa. Njirayi imachepetsa kuthamanga kwa mpweya wa SF6 mpaka 3kg / cm ^ 2 motero; imasungidwa m'malo osungira otsika. Mpweya wotsika kwambiri uwu umakokedwanso kumalo osungiramo mphamvu zambiri kuti agwiritsidwenso ntchito.

Tsopano kuthamanga kwa pistoni ya tsiku limodzi kumagwiritsidwa ntchito kutulutsa kuthamanga kwa arc quenching panthawi yotsegulira pogwiritsa ntchito pisitoni yomwe imalumikizidwa ndi zomwe zikuyenda.

Ubwino wa SF6 circuit breaker

SF6 ophwanya ma circuit ali ndi maubwino otsatirawa kuposa ophwanya wamba

1. Mpweya wa SF6 uli ndi zotchingira bwino kwambiri, kuzimitsa arc ndi zinthu zina zambiri zomwe ndi zabwino kwambiri za SF6 zowononga ma circuit.
2. Mpweyawu ndi wosayaka komanso wokhazikika pamankhwala. Zopangira zawo zowola sizimaphulika chifukwa chake palibe ngozi yamoto kapena kuphulika.
3. Chilolezo chamagetsi chimachepetsedwa kwambiri chifukwa champhamvu ya dielectric ya SF6.
4. Kuchita kwake sikukhudzidwa chifukwa cha kusiyana kwa chikhalidwe cha mumlengalenga.
5. Imapereka ntchito yopanda phokoso, ndipo palibe vuto lamagetsi chifukwa arc imazimitsidwa paziro pano.
6. Palibe kuchepa kwa mphamvu ya dielectric chifukwa palibe ma carbon particles omwe amapangidwa panthawi ya arcing.
7. Pamafunika kukonza pang'ono ndipo palibe mtengo wothinikizidwa mpweya wofunika.
8. SF6 imagwira ntchito zosiyanasiyana monga kuchotsa zolakwika za mzere waufupi, kusinthana, kutsegula mizere yopatsira osatsegula, ndi thiransifoma riyakitala, etc. popanda vuto lililonse.

Zoyipa za ma SF6 ma circuit breakers

1. Mpweya wa SF6 ukuphwera pang'ono. Pankhani ya kutayikira mu thanki yophwanyira, gasi wa SF6 ndi wolemera kuposa mpweya ndipo chifukwa chake SF6 imakhazikika mozungulira ndikupangitsa kuti ogwira ntchito azilephera.
2. Kulowera kwa chinyezi mu thanki yophulika ya SF6 ndikovulaza kwambiri kwa wosweka, ndipo kumayambitsa zolephera zingapo.
3. Ziwalo zamkati zimafunikira kutsukidwa nthawi ndi nthawi pozikonza pansi pa ukhondo ndi malo owuma.
4. Malo apadera amafunikira mayendedwe ndi kukonza mpweya wabwino.

(Timatchula nkhaniyi patsamba lino: https://circuitglobe.com/sf6-sulphur-hexaflouride-circuit-breaker.html)