Ukuze ugweme inkinga yokuvuza, ngaphezu kokugxilwa kwe-inqwaba yokushaja, ukukhethwa kwesivikeli sokuvuza nakho kubaluleke kakhulu.Ngokwendinganiso kazwelonke ye-GB/T 187487.1, umvikeli ovuzayo wenqwaba yokushaja kufanele asebenzise uhlobo B noma uhlobo A, olungavikeli nje kuphela ekuvuzeni kwe-AC, kodwa futhi oluvikela ngokumelene ne-pulsating DC.Umehluko omkhulu phakathi kohlobo B nohlobo A ukuthi Uhlobo B lwengeze isivikelo ekuvuzeni kwe-DC.Kodwa-ke, ngenxa yobunzima nemikhawulo yezindleko zokutholwa kohlobo B, abakhiqizi abaningi okwamanje bakhetha uhlobo A. Ukulimala okukhulu kokuvuza kwe-DC akukhona ukulimala komuntu siqu, kodwa ingozi efihliwe ebangelwa ukwehluleka kwedivayisi yokuvikela ukuvuza kwasekuqaleni.Kungashiwo ukuthi ukuvikelwa kokuvuza kwamanje kwezinqwaba zokushaja kunezingozi ezifihliwe ezingeni elijwayelekile.
Thayipha i-A leakage circuit breaker
I-A-type leakage circuit breaker kanye ne-AC-type leakage circuit breaker ziyafana ngokuyisisekelo ngokomgomo wokusebenza (inani lokuvuza likalwa nge-transformer yamanje elandelanayo eyiziro), kodwa izici kazibuthe ze-transformer ziyathuthukiswa.Iqinisekisa ukuhamba ngaphansi kwezimo ezilandelayo:
(a) Kuyafana nohlobo lwe-AC.
(b) I-DC edonsayo eyinsalela.
(c) I-DC yamanje ebushelelezi engu-0.006A ibekwe phezulu kwinsalela ye-DC yamanje.
Uhlobo B oluvuzayo lwe-circuit breaker —— (I-CHINAEVSE angenza i-RCD Type B)
Iziqephu zesekethe ezivuzayo zohlobo lwe-B zingavikela ngokuthembekile amasiginali e-sinusoidal AC, amasiginali e-DC ashayayo namasiginali abushelelezi, futhi zibe nezidingo zomklamo eziphakeme kunezinqamuli zesekethe ezivuzayo zohlobo A.Iqinisekisa ukuhamba ngaphansi kwezimo ezilandelayo:
a) Okufanayo Nohlobo A.
b) I-sinusoidal eyinsalela eshintshashintshayo yamanje iye ku-1000 Hz.
c) I-AC yamanje eyinsalela ibekwe ngaphezu kwamandla abushelelezi e-DC aphindwe izikhathi ezingu-0.4 kunowamanje oyinsalela olinganiselwe
d) Umthamo oyinsalela we-DC ovunguzayo uphakeme ngokuphindwe izikhathi ezingu-0.4 kunomthamo oyinsalela olinganiselwe noma i-DC ebushelelezi engu-10mA (noma yikuphi okukhulu).
e) Ama-currents e-DC ayinsalela akhiqizwa yizisekhethi zokulungisa ezilandelayo:
- ulayini woxhumano lwebhuloho oluyingxenye yamagagasi amabili ukuya kulayini wama-2-, 3- kanye nama-4-pole earth leakage break breakers.
- Okweziphakeli zesekethe ezivuzayo ezi-3-pole kanye ne-4-pole earth, uxhumano lwenkanyezi enguhhafu wamagagasi angu-3 noma uxhumo lwebhuloho lamagagasi angu-6.
Isikhathi sokuthumela: Jun-19-2023