Domin hana matsalar zubewa, ban da kasan ƙasa nacaji tari, zaɓin mai kare zubewa shima yana da mahimmanci.Dangane da ma'auni na GB/T 187487.1 na ƙasa, mai kariyar ɗigon cajin ya kamata ya yi amfani da nau'in B ko nau'in A, wanda ba wai kawai yana ba da kariya daga ɗigon AC ba, har ma yana ba da kariya daga bugun DC.Babban bambanci tsakanin Nau'in B da Nau'in A shine Nau'in B ya kara kariya daga zubar da DC.Duk da haka, saboda wahala da ƙarancin farashi na gano nau'in B, yawancin masana'antun a halin yanzu suna zaɓar nau'in A. Babban lahani na zubar da jini na DC ba shine rauni na mutum ba, amma haɗarin ɓoye wanda ya haifar da gazawar na'urar kariya ta asali.Ana iya cewa kariyar yoyon fitsari na yanzu na cajin tulin yana da ɓoyayyiyar haɗari a daidai matakin.
Nau'in A na'ura mai ba da hanya tsakanin hanyoyin sadarwa
Nau'in A-leakage circuit breaker da AC-type leakage circuit breaker asali iri daya ne ta fuskar ka'idar aiki (ana auna darajar yayyo ta hanyar sifili-jeri na yanzu), amma ana inganta halayen maganadisu na taswirar.Yana tabbatar da faɗuwa a ƙarƙashin yanayi masu zuwa:
(a) Daidai da nau'in AC.
(b) Ragowar wutar lantarki na DC.
(c) Santsi na DC na yanzu na 0.006A an ɗora shi akan ragowar ƙarfin halin yanzu na DC.
Nau'in B na'ura mai ba da wutar lantarki -- (CHINAEVSE iya RCD Type B)
Nau'in na'ura mai ba da wutar lantarki na B na iya dogaro da aminci don kare siginonin sinusoidal AC, bugun siginonin DC da sigina masu santsi, kuma suna da buƙatun ƙira sama da nau'in magudanar da'ira na A.Yana tabbatar da faɗuwa a ƙarƙashin yanayi masu zuwa:
a) Kamar nau'in A.
b) Residual sinusoidal alternating current zuwa 1000 Hz.
c) Ragowar AC na yanzu an sanya shi tare da santsin halin yanzu na 0.4 saura na halin yanzu.
d) Ragowar pulsating DC na yanzu an sanya shi tare da saura sau 0.4 da aka ƙididdige ragowar halin yanzu ko santsin halin yanzu na 10mA (kowane ya fi girma).
e) Ragowar igiyoyin ruwa na DC waɗanda aka samar ta hanyar da'irar gyara masu zuwa:
- layin haɗin gada mai rabi biyu zuwa layi don 2-, 3- da 4-pole leakage circuit breakers.
- Domin 3-pole da 4-pole duniya leakage circuit breakers, 3 rabin-kalaman taurari sadarwa ko 6 rabin-kalaman gada sadarwa.
Lokacin aikawa: Juni-19-2023