Don hana matsalar malalar ruwa, ban da kuma toshe hanyoyintarin caji, zaɓin mai kare ɓullar ruwa shima yana da matuƙar muhimmanci. A cewar ƙa'idar ƙasa ta GB/T 187487.1, mai kare ɓullar ruwa na tarin caji ya kamata ya yi amfani da nau'in B ko nau'in A, wanda ba wai kawai yana kare ɓullar ruwa ta AC ba, har ma yana kare shi daga bugun DC. Babban bambanci tsakanin Nau'in B da Nau'in A shine Nau'in B yana da ƙarin kariya daga ɓullar ruwa ta DC. Duk da haka, saboda wahalar da ƙarancin farashi na gano nau'in B, yawancin masana'antun a halin yanzu suna zaɓar nau'in A. Babban illar ɓullar ruwa ta DC ba shine raunin mutum ba, amma haɗarin ɓoyayyen da ya faru sakamakon gazawar na'urar kariyar ɓullar ruwa ta asali. Ana iya cewa kariyar ɓullar ruwa ta yanzu na tarin caji tana da ɓoyayyun haɗari a matakin da aka saba.
Na'urar warware da'ira ta Type A
Na'urar warware da'irar fitar da ruwa ta nau'in A da kuma na'urar warware da'irar fitar da ruwa ta nau'in AC iri ɗaya ne a tsarin aiki (ana auna ƙimar fitar da ruwa ta hanyar na'urar canza wutar lantarki ta sifili), amma an inganta halayen maganadisu na na'urar. Yana tabbatar da faɗuwa a ƙarƙashin waɗannan yanayi:
(a) Kamar nau'in AC.
(b) Ragowar wutar DC mai bugawa.
(c) An ɗora wutar DC mai santsi na 0.006A a kan ragowar wutar DC mai bugawa.
Na'urar fashewa ta hanyar watsa ruwa ta Nau'in B —— (CHINAEVSE iya yin RCD Type B)
Na'urorin fashewa na da'irar fitar da ruwa na Type B na iya kare siginar AC ta sinusoidal cikin aminci, suna bugun siginar DC da siginar santsi, kuma suna da buƙatun ƙira mafi girma fiye da na'urorin fashewa na da'irar fitar da ruwa na Type A. Yana tabbatar da faɗuwa a ƙarƙashin waɗannan yanayi:
a) Kamar yadda Nau'in A yake.
b) Saura ƙarfin lantarki mai canzawa zuwa 1000 Hz na sinusoidal.
c) An haɗa ragowar wutar AC da santsi mai jure zafi na DC sau 0.4 fiye da ƙimar ƙimar wutar lantarki mai jure zafi.
d) An haɗa ragowar wutar DC mai bugawa sau 0.4 fiye da ƙimar wutar lantarki mai ƙarfi ko kuma santsiyar wutar DC mai ƙarfi na 10mA (duk wanda ya fi girma).
e) Ragowar kwararar wutar lantarki ta DC da aka samar ta hanyar da'irorin gyarawa masu zuwa:
- layukan haɗin gada biyu masu rabin raƙuman ruwa zuwa layi don masu karya da'irar zubar da ruwa ta ƙasa mai sanduna 2, 3 da 4.
- Don masu fasa da'irar zubar da ruwa ta ƙasa mai sanduna 3 da sanduna 4, haɗin taurari masu rabin raƙuman ruwa 3 ko haɗin gadar rabin raƙuman ruwa 6.
Lokacin Saƙo: Yuni-19-2023