Ukuze kuthintelwe ingxaki yokuvuza, ukongeza kwisiseko seinqwaba yokutshaja, ukukhethwa komkhuseli wokuvuza kubaluleke kakhulu.Ngokomgangatho wesizwe we-GB/T 187487.1, umkhuseli wokuvuza wemfumba yokutshaja kufuneka asebenzise uhlobo lwe-B okanye uhlobo A, olungakhuseli kuphela ukuvuza kwe-AC, kodwa lukhusela ne-pulsating DC.Owona mahluko mkhulu phakathi koHlobo lwe-B kunye noHlobo lwe-A kukuba udidi B longeze ukhuseleko lokuvuza kwe-DC.Nangona kunjalo, ngenxa yobunzima kunye nokunyanzeliswa kweendleko zokufumanisa uhlobo lwe-B, abaninzi abavelisi ngoku bakhetha uhlobo A. Ingozi enkulu yokuvuza kwe-DC ayikona ukulimala komntu, kodwa ingozi efihliweyo ebangelwa ukungaphumeleli kwesixhobo sokukhusela ukuvuza.Kunokuthiwa ukukhuselwa kokuvuza kwangoku kweemfumba zokutshaja kuneengozi ezifihlakeleyo kwinqanaba eliqhelekileyo.
Uhlobo lwe-A ukuvuza i-breaker circuit
I-A-type yokuvuza i-breaker circuit breaker kunye ne-AC-type yokuvuza i-circuit breaker ifana ngokusisiseko ngokubhekiselele kumgaqo wokusebenza (ixabiso lokuvuza lilinganiswa nge-zero-sequence current transformer), kodwa iimpawu zamagnetic ze-transformer ziphuculwe.Iqinisekisa ukukhubeka phantsi kwezi meko zilandelayo:
(a) Ngokufana nohlobo lwe-AC.
(b) Umsinga weDC oshiyekileyo.
(c) I-DC egudileyo engu-0.006A ibekwe ngaphezulu kumsinga we-DC oshiyekileyo.
Uhlobo B oluvuza isaphuli sesekethe —— (ETSHAYINAEVSE unokwenza i-RCD Type B)
Uhlobo lwe-B oluvuzayo lwezaphuli zesekethe lunokukhusela ngokuthembekileyo imiqondiso ye-AC ye-sinusoidal, i-pulsating imiqondiso ye-DC kunye nemiqondiso egudileyo, kwaye ineemfuno zoyilo eziphezulu kunohlobo lwe-A ukuvuza ii-breaker circuit.Iqinisekisa ukukhubeka phantsi kwezi meko zilandelayo:
a) Ngokufana noHlobo A.
b) Intsalela ye-sinusoidal etshintshanayo yangoku ukuya kwi-1000 Hz.
c) Umsinga we-AC oshiyekileyo ubekwe ngaphezulu kunye ne-DC egudileyo yangoku ka-0.4 ngokuphindwe kabini kunomlinganiselo wentsalela yangoku.
d) Umsinga oshiyekileyo we-DC uphakanyiswe ngo-0.4 umphinda-phindene wentsalela yangoku okanye i-DC egudileyo ye-10mA (nokuba yeyiphi na enkulu).
e) Imisinga yeDC eyintsalela eveliswa zezi sekethi zolungiso zilandelayo:
- ezimbini isiqingatha-amaza unxibelelwano ibhulorho umgca ukuya kumgca 2-, 3- kunye 4-pali umhlaba ukuvuza izaphuli sesekethe.
- Kwipali ezi-3 kunye ne-4-pole umhlaba wokuvuza iisekethe zesekethe, uqhagamshelo lweenkwenkwezi ezingamaza amaza ama-3 okanye imidibaniso yebhulorho enesiqingatha-amaza amaza.
Ixesha lokuposa: Jun-19-2023