Neutral grounding resistors (NGRs) inoita basa rakakosha mumasisitimu emagetsi, kunyanya mukusimudzira kuchengetedzwa uye kuvimbika panguva yekukanganisa. Nekudzikamisa mafambiro emagetsi, izvi zvikamu zvinodzivirira midziyo nevashandi kubva kune njodzi dzinogona kuitika dzine chekuita nekukanganisa kwemagetsi. Ichi chinyorwa chinoongorora mashandiro, mabhenefiti, uye mashandisiro evasina kwavakarerekera grounding resistors, vachiratidza kukosha kwavo mukuchengetedza kuchengetedzwa kwemagetsi.
Chii chinonzi aNeutral Grounding Resistor?
A neutral grounding resistor mudziyo wemagetsi wakabatana pakati penzvimbo isina kwayakarerekera yetransformer kana jenareta nepasi. Chinangwa chayo chikuru ndechekudzikamisa ikozvino inoyerera kuburikidza nemutsara usina kwaakarerekera panguva yemamiriro epasi. Nekuunza kupokana munzira yekumisa, NGRs inova nechokwadi chekuti mafungu ekutadza anochengetwa pamazinga anogoneka, nekudaro kudzivirira kukuvadzwa kwemidziyo uye kuderedza njodzi dzekuchengetedza.
Neutral grounding resistor
Iyo Neutral Grounding Resistor Inoshanda Sei?
Kushanda kweNGR kunobva paMutemo waOhm, uyo unoti ikozvino (I) yakaenzana nemagetsi (V) yakakamurwa nekupikisa (R) (I = VRI = RV). Pasi pemamiriro ekushanda akajairika, hapana ikozvino kuyerera kuburikidza neNGR sezvo pasina mutsauko unokwanisa pakati penzvimbo isina kwayakarerekera uye pasi. Zvisinei, panguva yekukanganisa kwepasi-apo kushamwaridzana kusingatarisirwi kunoitika pakati pegadziriro yemagetsi uye pasi-musiyano unogona kuumbwa, uchibvumira ikozvino kufamba. Chiito ichi chinodzikisira ukuru hweyazvino inoyerera kuburikidza nehurongwa, ichidzivirira kuti isasvike nhanho dzine njodzi dzinogona kukonzera kukuvara kwemidziyo kana kuunza njodzi dzekuchengetedza dzakadai semagetsi emagetsi kana moto. Iyo NGR inobvisa simba panguva yechiitiko chinokanganisa uku ichiona kuti tembiricha inoramba iri mukati memiganhu yakachengeteka.
Benefits ofNeutral Grounding Resistors
1.Equipment Protection: Nekudzikamisa mafambiro ekukanganisa, maNGR anobatsira kuchengetedza ma transformer, jenareta, uye zvimwe zvakakosha zvemagetsi midziyo kubva mukukuvadzwa panguva yekukanganisa kwepasi. Kudzivirirwa uku kunogona kuderedza zvakanyanya mari yekugadzirisa uye kuderera.
2.Kuchengetedzwa Kwakawedzerwa: NGRs inoderedza njodzi yearc flash zviitiko uye njodzi yekuvhundutsa magetsi nekudzora kutadza kwemhepo. Iyi ficha inonyanya kukosha muzvirongwa zveindasitiri uko kuchengetedza kwevashandi kwakakosha.
3.Kugadzikana kwePhase Voltages: Munguva yekukanganisa mamiriro, NGRs anobatsira kudzikamisa chikamu voltages mukati meiyo system. Uku kugadzika kunovimbisa kuti michina yakabatana inoshanda zvakavimbika pasina kusangana nekuchinja kwemagetsi kunogona kukonzera kukundikana.
4.Kufambisa Kuonekwa Kwemhosho: Nekudzikamisa mafambiro ekutadza kusvika kumatanho akachengeteka, maNGR anogonesa mareyi ekudzivirira uye ekutarisa maturusi kushanda nemazvo. Uku kugona kunobatsira mukutsvaga nekukasira zvikanganiso, kuderedza system downtime.
5.Operational Continuity: Mune zvimwe zviitiko, NGRs inobvumira kuenderera mberi kwekushanda kwenguva pfupi panguva imwechete-ku-pasi kukanganisa. Ichi chimiro chakakosha pakuchengetedza kuenderera mberi kwesevhisi mumashandisirwo akakosha akadai senzvimbo dzedata uye nzvimbo dzehutano.
Zvikumbiro zveNeutral Grounding Resistors
Neutral grounding resistors inowanzoshandiswa mumasisitimu akasiyana emagetsi, anosanganisira:
1.Low-Voltage Distribution Systems: Inowanikwa muzvigadzirwa zvemabhizimisi uye zvivakwa zvekutengeserana, NGRs inokosha pakudzivirira low-voltage network kubva kune zvikanganiso zvepasi.
2.Medium-Voltage Distribution Systems: Mumashandisirwo epakati-voltage (1 kV kusvika 36 kV), NGRs inodzikamisa mafungu ekukanganisa uye inosimudzira kugadzikana kwehurongwa.
3.Jenareta Neutral Grounding: Majenareta akabatana kune ari oga masisitimu anoshandisa NGR kudzivirira yakawandisa kukanganisa mafungu panguva yekukanganisa kwepasi.
4.Transformer Neutral Grounding:Transformers mune yakavakirwa wye zvigadziriso zvinobatsira kubva kuNGRs kuchengetedza kubva mukukuvadza kukanganisa mafairi.
5.Renewable Energy Systems:Inowedzera kushandiswa mumagetsi ezuva uye mapurazi emhepo, NGRs inopa ivhu uye chengetedzo yekukanganisa mumashandisirwo emagetsi emagetsi.
Mhedziso
Neutral grounding resistorszvinhu zvakakosha mumasisitimu emagetsi emazuva ano, zvichipa dziviriro yakakosha pazvikanganiso zvepasi apo ichiwedzera kuchengetedzwa kwese uye kuvimbika. Nekudzikamisa mafambiro ekutadza uye kudzikamisa magetsi, maNGR anoita basa rakakosha mukuchengetedza michina nevashandi mumaindasitiri akasiyana. Sezvo masisitimu emagetsi ari kuramba achishanduka, kunzwisisa nekushandisa kwazvakarerekera grounding resistors kucharamba kwakakosha pakuona kuvimbika kwekushanda uye kuchengetedzeka mumambure ekugovera magetsi.
