Amakuru

Ihame ryo gupima imiyoboro ya dc yamashanyarazi ya insulator ahanini ni kimwe no gupima irwanya insulation.
Itandukaniro ni: dc yamenetse ya voltage yamashanyarazi muri rusange iruta ingufu za megohmmeter, kandi irashobora guhindurwa, megohmmeter, bitabaye ibyo, irarenze imbaraga zinenge zabonetse na megger, yunvikana kugirango yerekane insina ya farashi, imbere ya sandwich izishobora kwibasirwa nigitonyanga ziterwa no kuvunika no kuvunika kwaho, kwangirika kwamavuta yangiritse, char hejuru yubuso, nibindi.
Ikizamini cya voltage ya Dc na leakage ibipimo byubu nubwo uburyo ari bumwe, ariko uruhare rwarwo ruratandukanye, icyambere nukugerageza imbaraga zo kurwanya insulation, voltage yikizamini iri hejuru;Iheruka ikoreshwa mugusuzuma imiterere yimiterere, voltage yikigereranyo ni mike.Kubwibyo, imbaraga za dc voltage zifite akamaro kanini kugirango tubone inenge zaho, kandi zikoreshwa cyane mugupima gukumira moteri ya voltage nyinshi, insinga na capacator.Ifite ibiranga bikurikira ugereranije na ac test test.

1. Ibikoresho byo kwipimisha biroroshye kandi bito

Dc kwihanganira ibikoresho byo gupima voltage biroroshye kandi byoroshye mugupima gukumira mukibuga.Kurugero, kumirongo ya kabili, niba ac ihanganye nigeragezwa rya voltage, ubushobozi bwa capacitance kuri kilometero izaba amperes nyinshi, bisaba ibikoresho byo gupima ubushobozi bunini.Iyo ikizamini cya dc voltage cyakozwe, gusa insulasiyo yamenetse (kugeza kurwego rwa milliampere) itangwa nyuma yo guhagarara.

2. Irashobora gupima icyuka gisohoka icyarimwe

Dc kwihanganira ikizamini cya voltage irashobora kwerekana inenge yibitekerezo byokwirinda neza mugupima amashanyarazi yamenetse mugihe azamura buhoro buhoro voltage.Igicapo 3-1 cerekana uburyo busanzwe bwo gutembera kumurongo wa generator mugihe cya dc voltage ihanganye nikizamini.Kugirango ukingire neza, imyanda yamenetse yiyongera kumurongo hamwe na voltage kandi agaciro kayo ni ntoya, nkuko bigaragara kumurongo 1. Niba insulasiyo itose, agaciro kagezweho kiyongera, nkuko bigaragara kumurongo 2. Umurongo wa 3 werekana ko hari inenge yibitekerezo muri kwigana.Iyo imiyoboro yamenetse irenze igipimo runaka, impamvu igomba kumenyekana uko bishoboka kwose.Niba imyanda yamenetse inshuro 0.5 Ut yazamutse vuba, nkuko bigaragara kumurongo wa 4, noneho generator iba ifite ibyago byo gusenyuka mugihe ikora (usibye kurenza urugero).

Iyo dc voltage ihanganye nikizamini ikorerwa kumurongo wamashanyarazi, gusoma imiyoboro yameneka ikoreshwa mugushakisha inenge.Kurugero, mugihe itandukaniro ryibyiciro bitatu byamazi ari binini cyane cyangwa imiyoboro yamenetse ikiyongera vuba, voltage yikizamini irashobora kwiyongera cyangwa igihe cyumubyigano wa voltage irashobora kwagurwa kugirango ibone inenge ukurikije ibihe byihariye.

3. Kwangirika kwinshi

Dc nini ya voltage ifite ibyangiritse bike kubitera ibicuruzwa byapimwe.Iyo imbaraga za dc zikora cyane kuburyo isohoka ryigice riboneka mu cyuho cy’ikirere, umurima w’amashanyarazi uterwa n’amafaranga yatanzwe n’isohoka bizagabanya imbaraga zumurima mu cyuho cy’ikirere, bityo bikabuza inzira yo gusohora igice mu cyuho cy’ikirere.Niba ari ikizamini cya ac voltage, kubera guhora uhindura icyerekezo cyumubyigano, nko gusohora icyuho cyikirere, buri gice cyigice cyo gusohora igice, uku gusohora akenshi bizatera kwangirika kwibikoresho byangiza umubiri, gusaza kwangirika, kugabanya insulasiyo imikorere, kugirango inenge zaho ziyongere buhoro buhoro.Kubwibyo, dc kwihanganira ikizamini cya voltage nayo ifite imiterere yikizamini kidasenya kurwego runaka.

Ugereranije na ac kwihanganira ikizamini cya voltage, ibibi bya DC bihanganira ikizamini cya voltage ni: kubera gukwirakwiza amashanyarazi atandukanye imbere muri insulation munsi ya AC na DC, ikizamini cya DC cyihanganira ikizamini cya voltage ntabwo kiri hafi yukuri nkuko biri munsi ya AC.Kubwibyo, kuri kabili ya xLPE, ntabwo byemewe gukoresha ikizamini cya voltage ya DC, gusohora DC voltage ntabwo byoroshye gushyira isuku, byoroshye kuyobora kugumana amafaranga, kwangiza ikizamini.
Guhitamo imbaraga za dc voltage kwihanganira voltage yikizamini nacyo nikibazo cyingenzi, ni ibyerekeranye nimbaraga zumuriro wa AC zihanganira voltage na ac, igipimo cyimbaraga za DC, kandi ahanini gishingiye kuburambe bwo gukora kugirango butere imbere.Kurugero, stator ihindagurika ya generator ikubye inshuro 2-2.5 voltage yagenwe;Kumugozi wa 3, 6, 10kV, fata inshuro 5 ~ 6 zumubyigano wapimwe, kuri 20, 35kV, fata inshuro 4 ~ 5 za voltage yagenwe, naho insinga ziri hejuru ya 35kV, fata inshuro 3 voltage yagenwe.Igihe cya dc voltage cyihanganira ikizamini gishobora kuba kirekire kuruta icy'umubyigano wa AC wihanganira ikizamini, bityo ikizamini cya generator ni ukongera ingufu za voltage inshuro 0.5 kuri buri cyiciro, kandi ukaguma 1min muri buri cyiciro kugirango urebe kandi usome ibimeneka. agaciro kagezweho.Mugihe cyikizamini cya kabili, voltage yikizamini igomba gukomeza 5min kugirango turebe kandi dusome agaciro kasohotse.