I-Neutral Grounding Resistor (NGR) iyingxenye ebalulekile ezinhlelweni zamandla kagesi, ikakhulukazi kumaphrojekthi we-transformer, lapho isiza ukuthuthukisa ukuphepha nokuthembeka. I-NGR ikhawulela ubukhulu bamafault currents uma kwenzeka kuba nephutha eliphansi, ngaleyo ndlela ivikela i-transformer kanye nezinto zokusebenza ezihambisanayo. Ukuqonda umsebenzi we-NGR kubalulekile ezimbonini ezithembele kuma-transformer kumasistimu azo okusabalalisa ugesi.
Imisebenzi Esemqoka ye-NGR kuma-Transformer Systems:
1.Ukukhawulela Iphutha Lamanje
Ezinhlelweni zikagesi, amaphutha omhlaba (amasekhethi amafushane ukuya phansi) aphakathi kwamaphutha ajwayelekile. Ngaphandle kokubekwa phansi, iphutha eliphansi lingaholela ekulimaleni okuyingozi okuyingozi kwemishini nokudala izingozi kubasebenzi.
I-NGR ixhunywe phakathi kwephoyinti elingathathi hlangothi le-transformer nomhlaba. Umsebenzi wayo oyinhloko ukukhawulela amandla amanje ageleza ohlelweni ngesikhathi sephutha eliphansi liye ezingeni eliphephile nelilawulekayo. Isibonelo, uma kwenzeka iphutha lomugqa uye emhlabathini, i-NGR ikhawulela ukugeleza kwamanje, ivikela kokubili i-transformer nezingxenye ezingezansi.
2.Ukuvimbela Ukulimala Kwezisetshenziswa
Amaphutha angalawulwa angaholela ekushiseni ngokweqile, ekuqhekekeni kwe-insulation, ngisho nokwehluleka okuyinhlekelele kwama-transformer nezinye izakhi zikagesi. Ngokulawula iphutha lamanje, i-NGR inciphisa ukucindezeleka ohlelweni, ivimbela ukulimala kwemishini.
Lokhu kubaluleke kakhulu ezinhlelweni zamandla kagesi aphakathi nendawo ukuya phezulu lapho ama-transformer ebaluleke kakhulu ekusabalaliseni amandla ngendlela efanele. I-NGR ivimbela ukuphakama kwamanje okuphezulu ukuthi kungalimazi izingxenye zangaphakathi ezibucayi zama-transformer, ngaleyo ndlela andise isikhathi sokuphila sezisetshenziswa.
3.Ukuthuthukisa Ukuzinza Nokuphepha Kwesistimu
Amasistimu wokugawula nama-NGR athuthukisa ukuzinza kwesistimu ngokuvimbela ukushintshashintsha kwamandla kagesi okukhulu phakathi namaphutha aphansi. Lokhu kuqinisekisa ukuthi izingxenye ezingathintekile zesistimu zingaqhubeka nokusebenza, ngaleyo ndlela kuncishiswe isikhathi sokuphumula.
Ngaphezu kwalokho, ukukhawulela iphutha lamanje kunani elichazwe ngaphambilini kuthuthukisa ukuphepha kwabasebenzi. Amafasitela aphansi anciphisa ubungozi bokushaqeka kukagesi futhi anciphise izingozi zomlilo ezingase zibangelwe amaphutha aphansi anamandla amakhulu.
4.Ukusiza Ukutholwa Kwephutha Nokugcina
Ngokuphatha i-ground fault current, ama-NGR enza ukutholwa kwamaphutha kube lula. Ukudlula kwamanje ku-resistor kungalinganiswa, kucuphe ama-alamu noma ama-relay okuvikela ukwazisa opharetha ngephutha. Lokhu kusiza ekwenzeni okwasendaweni kanye nokuhlonza izinkinga ngokushesha, okuvumela ukulungiswa ngokushesha nokunciphisa isikhathi sokuphumula sisonke.
Kuphinde kusize izinsiza nezimboni ukunciphisa ukuphazamiseka kokusebenza, ikakhulukazi kwingqalasizinda ebalulekile njengezimboni zokuphehla ugesi, amaphrojekthi avuselelekayo avuselelekayo, kanye nezinsiza zezimboni.
5.Ukuhambisana namakhodi kanye namazinga kagesi
Izikhungo eziningi zezimboni nezinsiza kudingeka ukuthi zithobele amakhodi aqinile kagesi nemithetho yezokuphepha, egunyaza ukusetshenziswa kwezinhlelo zokumisa phansi njengama-NGR ukuvimbela ukulimala kwemishini nokuqinisekisa ukuphepha kwabasebenzi.
Ama-NGR asiza izikhungo ukuthi zihlangabezane nalezi zindinganiso zokulawula ngokuqinisekisa ukuthi amaphutha ahlala emazingeni aphephile.
Izinhlobo zama-NGR kanye nezicelo zawo
Ama-NGR eza ngokucushwa okuhlukahlukene kuye ngamandla kagesi kanye namazinga amanje adingekayo. Isibonelo, inani lokumelana lingalungiswa ukuze kuqinisekiswe ukuthi iphutha lamanje likhawulelwe kunani elithile, ngokuvamile ebangeni lama-ampere ayi-10 kuye kwayi-1,000. Lokhu kubenza basebenze ezinhlobonhlobo zezinhlelo ze-transformer:
●Ama-high-voltage transformer eziteshini ezincane azuza kuma-NGRs njengoba ekhawulela ama-currents amaphutha amakhulu, avimbela ukulimala kweziguquli zikagesi ezinkulu.
●Ama-voltage amaphakathi ezimbonini zisebenzisa ama-NGR ukuze avikele izinqubo zokukhiqiza ekuphazamisekeni kwamandla okungalindelekile ngenxa yamaphutha asemhlabeni.
Isiphetho
I-Neutral Grounding Resistor iyithuluzi elibalulekile kumaphrojekthi we-transformer, ehlinzeka kokubili ukuvikela nokuzinza ezinhlelweni zikagesi. Ngokukhawulela amaphutha, ukuvimbela ukulimala kwemishini, kanye nokuthuthukisa ukuphepha, i-NGR iyingxenye ebalulekile yezimboni ezithembele kuma-transformer ekusabalaliseni kwawo amandla. Ukusetshenziswa kwayo kabanzi kuzo zonke izinhlelo zokusebenza ezihlukene, okuhlanganisa izitshalo zezimboni, izinsiza zikagesi, namaphrojekthi wamandla avuselelekayo, kugcizelela ukubaluleka kwawo kubunjiniyela besimanje bukagesi.
Isikhathi sokuthumela: Oct-10-2024