I-Neutral grounding resistors (NGRs) idlala indima ebalulekile ezinhlelweni zikagesi, ikakhulukazi ekuthuthukiseni ukuphepha nokwethembeka phakathi nezimo zamaphutha. Ngokukhawulela amafu amaphutha, lezi zingxenye zivikela amathuluzi nabasebenzi ezingozini ezingaba khona ezihlobene namaphutha kagesi. Lesi sihloko sihlola ukusebenza, izinzuzo, kanye nokusetshenziswa kweziphikisayo ezisekela phansi ezingathathi hlangothi, kugqamisa ukubaluleka kwazo ekugcineni ukuphepha kukagesi.
Yini aI-Neutral Grounding Resistor?
I-neutral grounding resistor iyisisetshenziswa sikagesi esixhunywe phakathi kwephoyinti elingathathi hlangothi le-transformer noma i-generator kanye nomhlabathi. Inhloso yayo eyinhloko ukukhawulela i-current egeleza emugqeni ongathathi hlangothi ngesikhathi sephutha eliphansi. Ngokufaka ukumelana nomzila wokumisa, ama-NGR aqinisekisa ukuthi imisinga yamaphutha igcinwa emazingeni alawulekayo, ngaleyo ndlela ivimbele ukulimala kwemishini nokunciphisa izingozi zokuphepha.
I-Neutral grounding resistor
Sisebenza Kanjani I-Neutral Grounding Resistor?
Ukusebenza kwe-NGR kusekelwe kuMthetho ka-Ohm, othi yamanje (I) ilingana nogesi (V) ohlukaniswa ngokumelana (R) (I=VRI=RV). Ngaphansi kwezimo ezivamile zokusebenza, akukho ukugeleza kwamanje ku-NGR njengoba ungekho umehluko ongaba khona phakathi kwendawo engathathi hlangothi nendawo. Kodwa-ke, ngesikhathi sephutha lomhlabathi-lapho uxhumano olungahlosiwe lwenzeka phakathi kwesistimu kagesi nomhlabathi-umehluko ongase ube khona uyadalwa, okuvumela ukugeleza kwamanje.Kulesi simo, i-NGR ibeka umkhawulo wephutha lamanje ngokunikeza ukumelana okulawulwayo. Lesi senzo sinciphisa ubukhulu bamanje obugeleza ohlelweni, luyivimbele ekufinyeleleni emazingeni ayingozi angabangela ukulimala kwemishini noma enze izingozi zokuphepha ezifana nokushaqeka kukagesi noma imililo. I-NGR ichitha amandla ngesikhathi sesehlakalo sephutha kuyilapho iqinisekisa ukuthi izinga lokushisa lihlala lingaphakathi kwemikhawulo ephephile.
Izinzuzo zeI-Neutral Grounding Resistors
1.Ukuvikelwa Kwezisetshenziswa: Ngokunciphisa ama-currents amaphutha, ama-NGR asiza ukuvikela ama-transformer, amajeneretha, nezinye izinto zokusebenza zikagesi ezibalulekile ekulimaleni phakathi namaphutha omhlaba. Lokhu kuvikela kunganciphisa kakhulu izindleko zokulungisa kanye nesikhathi sokuphumula.
2.Ukuphepha Okuthuthukisiwe: Ama-NGR anciphisa ubungozi bezehlakalo ze-arc flash kanye nobungozi bokushaqeka kukagesi ngokulawula amaza okungasebenzi kahle. Lesi sici sibaluleke kakhulu kuzilungiselelo zezimboni lapho ukuphepha kwezisebenzi kubaluleke kakhulu.
3.Ukuzinzisa ama-Voltages eSigaba: Ngesikhathi sezimo zephutha, ama-NGR asiza ukuzinzisa ama-voltage esigaba ngaphakathi kwesistimu. Lokhu kuzinzisa kuqinisekisa ukuthi okokusebenza okuxhunyiwe kusebenza ngendlela ethembekile ngaphandle kokushintshashintsha kwamandla kagesi okungaholela ekuhlulekeni.
4.Ukugqugquzela Ukutholwa Kwephutha: Ngokukhawulela ama-currents amaphutha kumaleveli aphephile, ama-NGR anika amandla ukudluliselwa okuvikelekile namadivayisi okuqapha ukuthi asebenze kahle. Leli khono lisiza ekutholeni ngokushesha nokuhlukanisa amaphutha, kuncishiswe isikhathi sokuphumula sesistimu.
5.Ukuqhubeka Kokusebenza: Kwezinye izimo, ama-NGR avumela ukuqhubeka nokusebenza kwesikhashana phakathi nephutha elilodwa lomugqa ukuya phansi. Lesi sici sibalulekile ekugcineni isevisi iqhubeka kuzinhlelo zokusebenza ezibalulekile njengezikhungo zedatha nezindawo zokunakekelwa kwempilo.
Izicelo ze-Neutral Grounding Resistors
I-Neutral grounding resistors ivame ukusetshenziswa ezinhlelweni ezahlukene zikagesi, okuhlanganisa:
1.Amasistimu Wokusabalalisa Amandla Aphansi: Atholakala ezimbonini zezimboni nezakhiwo zezentengiselwano, ama-NGR abalulekile ukuze kuvikelwe amanethiwekhi angamandla kagesi aphansi kumaphutha angaphansi.
2.Amasistimu Wokusabalalisa Amandla Kagesi Amaphakathi: Ezinhlelweni zamandla kagesi aphakathi nendawo (1 kV ukuya ku-36 kV), ama-NGR akhawulela amafu amaphutha futhi athuthukisa ukuzinza kwesistimu.
3.I-Generator Grounding Neutral: Amajeneretha axhunywe kumasistimu angawodwa asebenzisa ama-NGR ukuvimbela imisinga yamaphutha amaningi phakathi namaphutha omhlaba.
4.I-Transformer Neutral Grounding:Ama-transformer ekucushweni kwe-wye okusekelwe phansi azuza kuma-NGR ukuze avikele ekulimazeni imisinga yamaphutha.
5.Amasistimu Amandla Avuselelekayo:Ngokusetshenziswa kakhulu ezitshalweni zamandla elanga nasemapulazini omoya, ama-NGR ahlinzeka ngokusekelwa kanye nokuvikeleka kwamaphutha ekusetshenzisweni kwamandla avuselelekayo.
Isiphetho
I-Neutral grounding resistorsziyizingxenye ezibalulekile ezinhlelweni zikagesi zesimanje, ezihlinzeka ngokuvikeleka okubalulekile emaphutheni aphansi kuyilapho kuthuthukisa ukuphepha nokuthembeka kukonke. Ngokukhawulela amaphutha kanye nokuqinisa amandla kagesi, ama-NGR adlala indima ebalulekile ekuvikeleni okokusebenza kanye nabasebenzi kuzo zonke izimboni ezahlukahlukene. Njengoba amasistimu kagesi eqhubeka nokuvela, ukuqonda nokusebenzisa izinto eziphikisana nesisekelo ezingathathi hlangothi kuzohlala kubalulekile ukuze kuqinisekiswe ubuqotho bokusebenza nokuphepha kumanethiwekhi okusabalalisa amandla.