Malunga ne-high voltage bushing

I-high-voltage bushing ibhekiselele kwisixhobo esivumela i-conductor enye okanye ezininzi ukuba zidlule kwizahlulo ezifana neendonga okanye iibhokisi zokugquma kunye nenkxaso, kwaye sisixhobo esibalulekileyo kwiinkqubo zamandla.Kwinkqubo yokuvelisa, ukuthutha kunye nokugcinwa, i-high-voltage bushings ingaba neziphene ezifihlakeleyo ngenxa yezizathu ezahlukeneyo;ngexesha lokusebenza ixesha elide, bachaphazeleka yimiphumo yentsimi yombane kunye nokufudumala kwe-conductor, umonakalo womatshini kunye nokubola kweekhemikhali, kunye neemeko ze-atmospheric.Kuya kubakho iziphene ngokuthe ngcembe.

I-high-voltage bushings isetyenziselwa ubukhulu becala ukugquma komhlaba wemigca yezixhobo zamandla ezingenayo neziphumayo ezifana ne-transformer, i-reactors, kunye ne-circuit breakers, kunye neesekethe eziphezulu zombane ezidlula kwiindonga.Kukho iintlobo ezintathu ze-voltage bushings ephezulu: i-dielectric bushing enye, i-dielectric bushing edibeneyo kunye ne-capacitive bushing.I-insulation engundoqo ye-capacitive bushing yenziwe nge-coaxial cylindrical series capacitor bank eyenziwe yi-winding layered insulating materials kunye ne-foil metal electrode ngokutshintshana kwintonga yokuqhuba.Ngokwezixhobo ezahlukeneyo zokugquma, yahlulahlulwe yangamaphepha anentlaka kunye ne-oiled paper capacitive bushing.I-110kV nangaphezulu kwe-transformer-high-voltage bushings idla ngokuba yi-oyile-iphephauhlobo lwe-capacitor;Iqulethwe ngamatheminali ocingo, ikhabhinethi yokugcina ioyile, umkhono weporcelain ongaphezulu, umkhono weporcelain ophantsi, i-capacitor core, intonga yesikhokelo, i-oyile yokukhusela, i-flange, kunye nebhola yoxinzelelo.

Ngethuba lokusebenza kwe-high-voltage bushing, i-insulation engundoqo kufuneka imelane ne-voltage ephezulu, kwaye inxalenye yomqhubi kufuneka ithwale umsinga omkhulu.Iimpazamo eziphambili kukuxhamla okungahambi kakuhle kwezixhumi zombane zangaphakathi nangaphandle, umswakama kunye nokuwohloka kwe-bushing insulation, ukungabikho kweoli kwi-bushing, ukukhutshwa kwenxalenye ye-capacitor core kunye nokukhutshwa kwesikrini sokugqibela emhlabeni, njl.

I-transformer bushing sisixhobo sokuphuma esikhokelela kwi-high-voltage wire ye-transformer ejikelezayo ukuya ngaphandle kwetanki yeoli, kwaye isebenza njengenxalenye ye-conductive inkxaso kunye nokugquma komhlaba.Ngethuba lokusebenza kwe-transformer, umthwalo wangoku udlula ixesha elide, kwaye i-short-circuit current current idlula xa isiphaluka esifutshane senzeke ngaphandle kwe-transformer.

Ke ngoko, i-transformer bushing ineemfuno ezilandelayo:

Kufuneka ube namandla ombane achaziweyo kunye namandla aneleyo omatshini;

Kufuneka ibe nokuzinza okuhle kwe-thermal kwaye ikwazi ukumelana nokugqithisa ngokukhawuleza xa i-short-circuited;incinci ngokwemilo, incinci ngobunzima, kwaye ilungile ekusebenzeni kokutywina.

Ukuhlelwa

I-high-voltage bushings ingahlulwa ibe yi-oil-filled bushings kunye ne-capacitive bushings.

Intamboiphephakwi-oyile egcwele i-oyile ifana neplate yokulinganisa kwi-capacitive bushing.I-capacitor core kwi-capacitive bushing yichungechunge lwe-coaxial cylindrical capacitors, kunye ne-oil-filled bushing, i-dielectric constant of paper insulating iphezulu kuneoli, enokunciphisa amandla entsimi apho.

I-oyile egcwele i-oyile inokwahlulwa ibe yi-gap ye-oyile enye kunye ne-oyile eninzi ye-gap bushings, kwaye i-capacitive bushings inokwahlulwa ibe yi-gummed kunye ne-oil paper bushings.

Imikhono isetyenziselwa xa ii-conductors zangoku zifuna ukudlula kwiindawo ezivaliweyo zetsimbi okanye iindonga ngezakhono ezahlukeneyo.Ngokwesi sihlandlo sisebenzayo, iibhutsi zinokwahlulwa zibe zii-transformer bushings, ii-bushings zokutshintsha okanye izixhobo zombane ezidityanisiweyo, kunye neendonga zodonga.Kulo lungiselelo lwe-electrode "plug-in", indawo yombane igxininiswe kakhulu kumda we-electrode yangaphandle (njenge-flange ephakathi kwe-bushing), apho ukukhutshwa kudla ngokuqala.

Ukusetyenziswa kunye neempawu ze-casing

I-high-voltage bushings isetyenziselwa abaqhubi be-high-voltage ukuba badlule kwizahlulo ezinobunzima obuhlukeneyo (ezifana neendonga kunye neengcingo zetsimbi zezixhobo zombane) zokugquma kunye nokuxhasa.Ngenxa yokusabalalisa okungafaniyo kwintsimi yombane kwi-bushing, ngokukodwa intsimi yombane egxininisiweyo kumda we-flange ephakathi, kulula ukubangela ukukhutshwa kwe-surface slipping.Ubume be-insulation yangaphakathi ye-bushing enezinga eliphezulu le-voltage inzima ngakumbi, ihlala isebenzisa izinto ezidibeneyo zokugquma, kwaye kukho iingxaki ezifana nokukhupha inxalenye.Ngoko ke, uvavanyo kunye nokuhlolwa kwe-casing kufuneka kuqiniswe.