Yintoni iDC miniature breaker (MCB)?
Imisebenzi ye-DC MCB kunye ne-AC MCB iyafana. Bobabini bakhusela izixhobo zombane kunye nezinye izixhobo zomthwalo kwi-overload kunye neengxaki ze-short-circuit, kwaye zikhusela ukhuseleko lwesekethe. kodwa iimeko zokusetyenziswa kwe-AC MCB kunye ne-DC MCB zahlukile. Ngokuqhelekileyo kuxhomekeke ekubeni i-voltage esetyenziswayo iyatshintshana namazwe akhoyo okanye imimandla yangoku ngokuthe ngqo. Uninzi lwe-DC MCB lusebenzisa iinkqubo zangoku ezithe ngqo njengamandla amatsha, i-PV yelanga, njl.
Umahluko phakathi kwe-AC MCB kunye ne-DC MCB ngeeparamitha ezibonakalayo kuphela, i-AC MCB ineeleyibhile zeetheminali njenge-LOAD kunye neetheminali ze-LINE ngelixa i-DC MCB iya kuba nophawu oluhle (+) okanye olubi (-) kwitheminali yayo.
Indlela yokudibanisa i-DC MCB ngokuchanekileyo?
Ngenxa ye-DC MCB inophawu lwe '+' kunye '-' isimboli kuphela, kudla ngokuba lula ukudibanisa ngokungalunganga. Ukuba i-DC miniature breaker circuit breaker iqhagamshelwe okanye ifakwe iingcingo ngokungachanekanga, kukho amathuba okuba kwenzeke iingxaki. Kwimeko yokugqithiswa okanye isiphaluka esifutshane, i-MCB ayiyi kukwazi ukunqumla i-current kwaye ikhuphe i-arc, oku kunokukhokelela ekutshiseni i-breaker.
Ke ngoko, iDC MCB inophawu lwe '+' kunye '-' iisimboli, kusafuneka iphawule indlela yesekethe kunye nemizobo yocingo, njengoko kubonisiwe ngezantsi:
2P 550VDC
4P 1000VDC
Ngokutsho komzobo wocingo, i-2P DC MCB ineendlela ezimbini zocingo, enye iphezulu idityaniswe kwiipali ezilungileyo nezingalunganga, enye indlela isezantsi idityaniswe kwiipali ezilungileyo nezingalunganga njengokumakishwa kwe-'+' kunye ne-'- '. Kwi-4P 1000V DC MCB ineendlela ezintathu zocingo, ngokwemiqathango yokusetyenziswa eyahlukeneyo, ukukhetha umzobo wocingo ohambelanayo ukudibanisa iingcingo.
Ngaba i-AC MCB isebenza kumazwe e-DC?
Isiginali ye-AC yangoku itshintsha ngokuqhubekayo ixabiso layo kwisibini ngasinye. Umqondiso wombane we-AC uyatshintsha ukusuka kwi-positive ukuya kwi-negative kwisekhondi nganye yomzuzu. I-arc ye-MCB iya kucinywa kwi-Volts ye-0, i-wiring iya kukhuselwa kumbane omkhulu. Kodwa isibonakaliso se-DC asitshintshi, sihamba kwimeko eqhubekayo kwaye ixabiso le-voltage liguqulwa kuphela xa isiphaluka sihamba OFF okanye isekethe iyancipha ngexabiso elithile. Ngaphandle koko, isekethe ye-DC iya kubonelela ngexabiso le-voltage rhoqo ngomzuzwana ngamnye womzuzu. Ke, njengoko kungekho ndawo ye-Volt engu-0 kwimo ye-DC, ayicebisi ukuba i-AC MCB isebenze kumazwe e-DC.
Ixesha lokuposa: Jul-30-2021