TRANSFORMER BUSHINGS

Kodi bushings ndi chiyani?

Zomera zamagetsi ndizofunikira pazida zosiyanasiyana zamagetsi monga ma transfoma, ma shunt reactor ndi switchgears. Zipangizozi zimapereka chotchinga chofunikira chotchinga pakati pa kondakitala wamoyo ndi ma conductive thupi a zida zamagetsi zomwe zingatheke pansi. Ntchito yovutayi imalola kuti ma bushings azitha kunyamula ma voltages apamwamba kudzera pa chotchinga cha conductive cha zida zotsekera. Masamba a JIEOZU adapangidwa kuti ateteze kulephera kwa magetsi kuchokera ku flashover kapena kubowola, kuchepetsa kutentha kwapanthawiyo, komanso kupirira mphamvu zamakina kuchokera pakunyamula chingwe ndi kukulitsa kutentha.

Kusungunula kwamkati kwa bushing kuyenera kupirira kupsinjika kwamagetsi komwe kungapirire muutumiki. Zopanikizikazi zimayamba chifukwa cha kusiyana kwa magetsi kuchokera ku kondakitala wamagetsi kupita kuzinthu zokhazikika zomwe bushing imadutsamo. Pamagetsi apakati komanso apamwamba, kutsekereza kwamkati kuyeneranso kuchepetsa kuyambika kwa partial discharge (PD) komwe kumatha kuwononga pang'onopang'ono mphamvu ndi mphamvu za kutsekereza.

Kutsekera kwakunja kwa bushings kumakhala ndi mapangidwe apadera monga kuchuluka kwa mashedi ndi mtunda wa creepage kuti apereke kulekanitsa pakati pa malo olumikizirana ndi HV ndi kuthekera kwapansi kunja kwa gawolo. Cholinga cha zinthuzi ndikuletsa kupukuta kowuma (flashover) ndi kukwawa (kutayikira). Dry Arcing, yovoteledwa ndi BIL, imafuna mtunda wokwanira kuti mabasi azitha kupirira mphamvu zamagetsi kuchokera pakusintha ndi kuwomba kwa mphezi. Zochitika izi zingayambitse kulephera kwa flashover pomwe arc yamagetsi imapanga kuchokera kwa kondakitala wa HV molunjika pansi ngati mtunda suli wokwanira pamagetsi. Creep (Kutayikira) kumachitika pamene kuipitsidwa kumachulukana pamwamba pa tchire ndikupereka njira yotsatsira yomwe ikutsatira pano. Kuphatikizika kwa ma shedi pamapangidwe a tchire kumawonjezera kutalika kwa tchire pakati pa HV terminal ndi nthaka kuti zisawonongeke.

JIEZOU imapanga ma epoxy bushings amkati & kunja kwa switchgear, thiransifoma & zida zamagetsi pamagulu onse otsika komanso apakatikati. Ma Bushings athu adapangidwa ndikuyesedwa kuti akwaniritse miyezo yoyenera ya CSA, IEC, NEMA, ndi IEEE.

Low Voltage Bushings amavotera ma voltages mpaka 5kV/60kV BIL ndi Medium Voltage bushings amavotera ma voltages ofikira 46kV/250kV BIL.

JIEZOU imapanga ma Epoxy bushings, omwe ndi abwino kwambiri m'malo mwa Porcelain Bushings ndipo ali ndi ubwino wambiri. Onani nkhani yathu ya Epoxy Bushings vs Porcelain Bushings

Kusintha kwa ma transfoma

Transformer bushing ndi chipangizo chotchingira chomwe chimalola kokondakita wamphamvu, wonyamula pakali pano kudutsa mu thanki yokhazikika ya thiransifoma. A Bar-Type Bushing ali ndi kondakitala womangidwamo, pomwe Draw-Lead kapena Draw-Rod Bushing ali ndi makonzedwe oti akhazikitsidwe kokondakita wina pakati pawo. Zitsamba zolimba (zochuluka) ndi zitsamba zokhala ndi capacitance (mtundu wa condenser) ndi mitundu iwiri yayikulu yomanga tchire:

Zitsamba zolimba zokhala ndi porcelain kapena epoxy insulator nthawi zambiri zimagwiritsidwa ntchito ngati malo olumikizirana kuchokera ku mbali yokhotakhota yotsika ya thiransifoma kupita kunja kwa thiransifoma.
Zomera zokhala ndi capacitance zimagwiritsidwa ntchito pamagetsi apamwamba kwambiri. Poyerekeza ndi zitsamba zolimba, zimakhala zovuta kwambiri pomanga. Kuti athane ndi kupsinjika kwamphamvu kwamagetsi komwe kumapangidwa pamagetsi okwera kwambiri, ma bushings opangidwa ndi capacitance amakhala ndi chishango chamkati champhamvu, chomwe chimayikidwa pakati pa kondakitala wapakatikati ndi insulator yakunja. Cholinga cha zishango zoyendetsera izi ndikuchepetsa kukhetsa pang'ono poyang'anira gawo lamagetsi lozungulira chowongolera chapakati, kotero kuti kupsinjika kwamunda kumakhazikika mofanana mkati mwa kutchinjiriza kwa bushing.

Zambiri zamalonda-1.2kV Pulasitiki Yopangidwa ndi Tri-clamp Secondary Bushing