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Ka'idar aunawa dc leakage halin yanzu na insulator daidai yake da na auna juriya.
Bambanci shine: dc leak gwajin ƙarfin lantarki gabaɗaya ya fi ƙarfin megohmmeter, kuma ana iya daidaita shi, megohmmeter, in ba haka ba, yana da girma fiye da tasirin lahani da aka samu ta hanyar megger, mai kula da yin la'akari da ɓarkewar ain, ciki na sanwici. abin rufe fuska ya shafa tare da damshi za a shafa tare da damshi da karaya na gida, lalatawar mai mai lalacewa, char tare da saman rufin, da sauransu.
Gwajin wutar lantarki na Dc da ma'aunin yayyo na yanzu ko da yake hanyar iri ɗaya ce, amma aikinta ya bambanta, na farko shine don gwada ƙarfin juriya, ƙarfin gwajin ya fi girma;Ana amfani da na ƙarshe don duba yanayin rufewa, ƙarfin gwajin yana da ƙananan ƙananan.Sabili da haka, juriya na dc yana da mahimmanci na musamman don nemo wasu lahani na gida, kuma ana amfani dashi sosai a gwajin rigakafin manyan injina, igiyoyi da capacitors.Yana da halaye masu zuwa idan aka kwatanta da gwajin matsa lamba.

1. Kayan gwaji yana da haske da ƙananan

Kayan aikin gwajin ƙarfin lantarki na Dc yana da ɗan haske da dacewa don gwajin rigakafi a cikin filin.Misali, don layukan kebul, idan ac yana jure gwajin ƙarfin lantarki, ƙarfin halin yanzu kowane kilomita zai zama amperes da yawa, yana buƙatar manyan kayan gwajin ƙarfin aiki.Lokacin da aka yi gwajin ƙarfin lantarki na dc, kawai ana ba da ɗigon insulation na halin yanzu (har zuwa matakin milliampere) bayan daidaitawa.

2. Zai iya auna ɗigogi a lokaci guda

Gwajin jurewar wutar lantarki na Dc na iya yin nuni da lahani a cikin rufin da kyau ta hanyar auna ɗigogi a halin yanzu yayin haɓaka ƙarfin lantarki a hankali.Hoto na 3-1 yana nuna wasu magudanar ruwa na yau da kullun na rufin janareta yayin jurewar gwajin dc.Don haɓaka mai kyau, ƙayyadadden halin yanzu yana ƙaruwa da layi tare da ƙarfin lantarki kuma ƙimar halin yanzu yana ƙarami, kamar yadda aka nuna a cikin lanƙwasa 1. Idan rufin yana da damp, ƙimar halin yanzu yana ƙaruwa, kamar yadda aka nuna a cikin lanƙwasa 2. Curve 3 yana nuna kasancewar lahani a ciki. rufi.Lokacin da ruwan ɗigo ya wuce ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun, ya kamata a gano musabbabin yadda zai yiwu don kawar da shi.Idan ruwan yabo a kusa da sau 0.5 Ut ya tashi da sauri, kamar yadda aka nuna a cikin lankwasa 4, to janareta yana cikin haɗarin rushewa yayin aiki (ban da wuce gona da iri).

Lokacin da aka gudanar da gwajin jurewar wutar lantarki dc akan igiyoyin wutar lantarki, ana yawan amfani da karatun ɗigogi don nemo lahani.Misali, lokacin da bambance-bambancen ruwan yabo mai hawa uku ya yi yawa sosai ko kuma ruwan ɗigo ya ƙaru da sauri, ana iya ƙara ƙarfin gwajin gwajin ko kuma a tsawaita tsayin ƙarfin ƙarfin wutar lantarki don nemo lahani daidai da takamaiman yanayin.

3. Ƙananan lalacewa ga rufi

Babban ƙarfin lantarki na Dc yana da ɗan lahani ga rufin samfurin da aka gwada.Lokacin da ƙarfin wutar lantarki na dc ya yi girma wanda ke faruwa a cikin tazarar iska, filin lantarki na counter wanda cajin da aka samar ya haifar da shi zai raunana ƙarfin filin a cikin tazarar iska, don haka ya hana tsarin fitar da sassan a cikin tazarar iska.Idan gwajin wutar lantarki ne ac, saboda canjin yanayin wutar lantarki akai-akai, kamar fitarwar ratar iska, kowane rabin igiyar ruwa na ɓarna, wannan fitowar sau da yawa yana haɓaka bazuwar kayan hana ruwa, lalata tsufa, rage rufin. aiki, ta yadda lahani na gida sannu a hankali ya fadada.Saboda haka, dc jure ƙarfin lantarki gwajin shima yana da yanayin gwajin mara lalacewa zuwa wani ɗan lokaci.

Idan aka kwatanta da gwajin ƙarfin lantarki na ac, illar gwajin ƙarfin wutar lantarki na DC shine: saboda bambancin wutar lantarki a cikin rufin da ke ƙarƙashin AC da DC, gwajin gwajin ƙarfin wutar lantarki na DC ba ya kusa da gaskiya kamar na AC.Don haka, don kebul na xLPE, ba a ba da shawarar yin amfani da gwajin wutar lantarki na DC ba, fitarwar gwajin wutar lantarki na DC ba ta da sauƙin sanya tsabta, mai sauƙin kai ga riƙe caji, lalata gwajin.
Zaɓin wutar lantarki na dc mai jure ƙarfin gwaji shima matsala ce mai mahimmanci, yana magana ne akan mitar wutar lantarki AC da ke jure ƙarfin wutar lantarki da ac, ƙarfin rushewar DC, kuma galibi bisa ƙwarewar aiki don haɓakawa.Misali, iskar gas na janareta shine sau 2-2.5 gwargwadon ƙarfin lantarki;Domin 3, 6, 10kV igiyoyi, dauki 5 ~ 6 sau da rated irin ƙarfin lantarki, don 20, 35kV igiyoyi, kai 4 ~ 5 sau da rated irin ƙarfin lantarki, kuma ga igiyoyi sama da 35kV, dauki 3 sau da rated irin ƙarfin lantarki.Lokacin gwajin jurewar wutar lantarki dc na iya zama tsayi fiye da na AC ƙarfin jure gwaji, don haka gwajin janareta shine ƙara ƙimar ƙarfin lantarki da sau 0.5 na kowane mataki a matakai, kuma tsaya na 1min a kowane mataki don lura da karanta ɗigon ruwa. darajar yanzu.A yayin gwajin kebul, yakamata a ci gaba da ƙarfin gwajin na tsawon mintuna 5 don lura da karanta ƙimar halin yanzu.