AMATHATHI OMTSHANISI

Yintoni amahlahla?

I-Bushings yombane zizinto eziyimfuneko kuluhlu olubanzi lwezixhobo zombane ezifana ne-transformer, i-shunt reactors kunye ne-switchgears. Ezi zixhobo zibonelela ngomqobo wokukhusela oyimfuneko phakathi kwe-conductor ephilayo kunye nomzimba oqhubayo wesixhobo sombane kwisakhono sasemhlabeni. Lo msebenzi ubalulekileyo uvumela i-bushings ukuba iphathe okwangoku kumbane ophezulu ngokusebenzisa umqobo wokuqhuba izixhobo ezivaliweyo. I-JIEOZU bushings yenzelwe ukuthintela ukungaphumeleli kombane kwi-flashover okanye i-puncture, ukunciphisa ukunyuka kobushushu kunye nokulinganisa kwangoku, kunye nokumelana namandla omatshini ukusuka kumthwalo wentambo kunye nokwandiswa kwe-thermal.

I-insulation yangaphakathi ye-bushing kufuneka imelane noxinzelelo lombane oluya kunyamezela enkonzweni. Olu xinzelelo lubangelwa ngumahluko onokubakho wombane ukusuka kumqhubi wombane ukuya kumalungu asekelwe phantsi apho i-bushing idlula khona. Kwizicelo zombane ophakathi kunye nophezulu, isigqubuthelo sangaphakathi kufuneka sithintele ukuqaliswa kokukhuphela okungaphelelanga (PD) okunokuthi ngokuthe ngcembe kuthobe iipropathi kunye nokukwazi ukugquma.

I-bushings yangaphandle yokugquma inezinto ezithile zokuyila ezifana nenani leeshedi kunye nomgama wokukrazula ukubonelela ngokwahlukana phakathi kweendawo zoqhagamshelo ze-HV ezinamandla kunye nomhlaba onokwenzeka ngaphandle kwendawo. Injongo yezi mpawu kukuthintela i-arcing eyomileyo (i-flashover) kunye ne-creep (ukuvuza). I-Dry Arcing, elinganiswe yi-BIL, ifuna umgama owaneleyo ukuze ibhasi ikwazi ukumelana nombane ekutshintsheni nasekubetheni kwemibane. Ezi ziganeko zingabangela ukusilela kwe-flashover apho i-arc yombane ifom ukusuka kumqhubi we-HV ngokuthe ngqo emhlabeni ukuba umgama awunelanga kumbane. I-Creep (Ukuvuza) kwenzeka xa ungcoliseko lukhula phezu komphezulu we-bushing kwaye lubonelela ngendlela yokuqhuba umsinga ukuba ulandele umphezulu. Ukufakwa kweeshedi kuyilo lwehlathi kwandisa ngokufanelekileyo umgama ongaphezulu we-bushing phakathi kwe-HV terminal kunye nomhlaba ukukhusela ilahleko ye-creepage.

I-JIEZOU yenza i-epoxy bushings yangaphakathi nangaphandle ye-switchgear, isiguquli kunye nosetyenziso lwezixhobo zamandla kuzo zombini iiklasi zamandla ombane aphantsi naphakathi. IiBushings zethu ziyilwe kwaye zivavanywe ukuhlangabezana nemigangatho esebenzayo yeCSA, IEC, NEMA, kunye neIEEE.

I-Low Voltage Bushings inikwe umlinganiselo wombane ukuya kuthi ga kwi-5kV/60kV BIL kunye ne-Medium Voltage bushings ithelekelwe umbane ofikelela kwi-46kV/250kV BIL.

I-JIEZOU yenza i-Epoxy bushings, eyona ndawo ifanelekileyo endaweni yePorcelain Bushings kwaye ineenzuzo ezininzi. Jonga inqaku lethu malunga ne-Epoxy Bushings vs Porcelain Bushings

Ukutyholwa kwee-transformers

I-transformer bushing sisixhobo sokugquma esivumela umqhubi onamandla, ophetheyo wangoku ukuba adlule kwitanki esekelwe phantsi ye-transformer. I-Bar-Type Bushing ine-conductor eyakhelweyo, ngelixa i-Draw-Lead okanye i-Draw-Rod Bushing inesibonelelo sokuba i-conductor eyahlukileyo ifakwe kwiziko layo. Amatyholo aqinileyo (uhlobo oluninzi) kunye ne-capacitance-graded bushings (uhlobo lwe-condenser) zezona ndlela zimbini zokwakhiwa kwamahlahla:

Izihlahla eziqinileyo ezineporcelain okanye i-epoxy insulator zidla ngokusetyenziswa njengeendawo zoqhagamshelo ukusuka kwicala elijikajikayo lombane ophantsi we transformer ukuya ngaphandle kwesiguquli.
I-Bushings ye-Capacitance-graded bushings isetyenziswa kumandla ombane aphezulu. Xa kuthelekiswa namahlahla aqinileyo, anzima kakhulu ekwakhiweni kwawo. Ukujamelana noxinzelelo oluphezulu lwentsimi yombane oluveliswe kumbane ophezulu, i-capacitance-graded bushings ixhotyiswe ngekhaka le-capacitance-graded shield, efakwe phakathi kwe-conductor ephetheyo yangoku kunye ne-insulator yangaphandle. Injongo yalezi zikhuselo zokuqhuba kukunciphisa ukukhutshwa kwenxalenye ngokulawula intsimi yombane ejikeleze umqhubi weziko, ukwenzela ukuba uxinzelelo lwentsimi lugxininiswe ngokulinganayo ngaphakathi kwe-bushing insulation.

Ulwazi lwemveliso-1.2kV Plastic Molded Tri-clamp Secondary Bushing