Ukuze kuthintelwe ingxaki yokuvuza, ukongeza ekubekweni komhlaba kwe-inqwaba yokutshaja, ukukhethwa kwesithinteli sokuvuza nako kubaluleke kakhulu. Ngokwemigangatho kazwelonke ye-GB/T 187487.1, isithinteli sokuvuza senqwaba yokutshaja kufuneka sisebenzise uhlobo B okanye uhlobo A, olungakhuseli kuphela ukuvuza kwe-AC, kodwa lukwakhusela ne-DC ebetha ngamandla. Umahluko omkhulu phakathi kohlobo B nohlobo A kukuba uhlobo B longeze ukhuseleko ekuvutheni kwe-DC. Nangona kunjalo, ngenxa yobunzima kunye nemida yeendleko zokufunyanwa kohlobo B, uninzi lwabavelisi ngoku bakhetha uhlobo A. Umonakalo omkhulu wokuvuza kwe-DC asikokwenzakala komntu, kodwa yingozi efihliweyo ebangelwa kukungasebenzi kakuhle kwesixhobo sokuqala sokukhusela ukuvuza. Kunokuthiwa ukhuseleko lokuvuza lwangoku lweenqwaba zokutshaja luneengozi ezifihliweyo kwinqanaba eliqhelekileyo.
Isixhobo sokwaphula isekethe yokuvuza yohlobo lwe-Type A
I-A-type leakage circuit breaker kunye ne-AC-type leakage circuit breaker ziyafana ngokwemigaqo yokusebenza (ixabiso lokuvuza lilinganiswa nge-zero-sequence current transformer), kodwa iimpawu zemagnethi ze-transformer ziyaphuculwa. Iqinisekisa ukukhubeka phantsi kwezi meko zilandelayo:
(a) Ifana nohlobo lwe-AC.
(b) Umsinga we-DC otsalayo oshiyekileyo.
(c) Umsinga we-DC ogudileyo we-0.006A ubekwe phezu komsinga we-DC osele ujikeleza.
Isixhobo sokwaphula isekethe yokuvuza yohlobo B —— (I-CHINAEVSE ndingenza i-RCD Type B)
Ii-Type B leakage circuit breakers zinokukhusela ngokuthembekileyo ii-sinusoidal AC signals, ii-pulsating DC signals kunye nee-smooth signals, kwaye zinemfuno eziphezulu zoyilo kunee-type A leakage circuit breakers. Ziqinisekisa ukukhubeka phantsi kwezi meko zilandelayo:
a) Ifana nohlobo A.
b) I-Residual sinusoidal alternating current ukuya kwi-1000 Hz.
c) Umsinga we-AC oseleyo ubekwe ngaphezulu komsinga we-DC ogudileyo ophindwe kayi-0.4 kumsinga we-residual olinganisiweyo
d) Umsinga we-DC orhuqayo osele ushiywe ubekwe ngaphezulu ngomlinganiselo ophindwe kayi-0.4 womsinga osele ubekwe umlinganiselo okanye umsinga we-DC ogudileyo we-10mA (nokuba yeyiphi na enkulu).
e) Imisinga ye-DC eseleyo eveliswa zezi sekethe zokulungisa zilandelayo:
- umgca woqhagamshelo lwebhulorho enesiqingatha samaza amabini ukuya kolunye lweziphuli-setyhula zokuvuza komhlaba ezineepali ezimbini, ezintathu kunye nezine.
- Kwiziqhekezi zesekethe zokuvuza komhlaba ezineepali ezi-3 kunye neepali ezi-4, uqhagamshelo lweenkwenkwezi ezi-3 ezineepali ezi-5 okanye uqhagamshelo lwebhulorho eneepali ezi-6 ezineepali ezi-5.
Ixesha lokuthumela: Juni-19-2023