Yintoni iCircuit Breakers?
Iswitshi yombane eyenzelwe ukugada isekethi yombane ukuba yonakaliswe nto leyo ebangelwa kukugqithiswa kwangoku/ukulayisha ngaphezulu okanye isekethe emfutshane eyaziwa ngokuba yi-circuit breaker.Umsebenzi wayo ophambili kukuphazamisa i-ow yangoku emva kokuqaphela ingxaki yokuhanjiswa kokhuseleko.
Umsebenzi weSwitch yeSekethe yeBreaker.
Umsebenzi we-circuit breaker ngokuba sisixhobo sokhuseleko ngaloo ndlela ukhusela umonakalo kwiinjini kunye neengcingo xa i-current flowing through the circuit circuit yombane idlula imida yoyilo.Ikwenza oku ngokususa umsinga kwisekethe xa kuvela imeko engakhuselekanga.
Basebenza njani iDC Circuit Breakers?
Njengoko igama labo libonisa, i-Direct Current (DC) i-circuit breakers ikhusela izixhobo zombane ezisebenza ngokuthe ngqo.Umahluko obalulekileyo phakathi kwangoku ngokuthe ngqo kunye nokutshintshana kwangoku kukuba i-voltage ephuma kwi-DC ayitshintshi.Ngokwahlukileyo, imveliso yombane kwi-Alternating Current (AC) ijikeleza kaninzi kwisekhondi nganye.
Yintoni uMsebenzi we-DC Circuit Breaker?
Imigaqo efanayo yokukhusela i-thermal kunye nemagnethi yokukhusela iyasebenza kwii-DC breakers njengoko zisenza kwi-AC circuit breakers:
Ukhuseleko lwe-Thermal luhamba nge-DC ye-circuit breaker xa umsinga wombane udlula ixabiso elilinganisiweyo.I-Bimetallic contact heats yandisa kwaye ihambe i-breaker circuit kule ndlela yokukhusela.Ukhuseleko lwe-thermal lusebenza ngokukhawuleza ngenxa yokuba i-current ivelisa ubushushu obuninzi ukuze kwandiswe kwaye ivule uxhulumaniso lombane njengoko okwangoku kuninzi.Ukhuseleko lobushushu lwesaphuli sesekethe ye-DC lukhusela kumsinga womthwalo ongaphezulu kancinane kunomjelo osebenzayo oqhelekileyo.
Xa kukho imisinga yempazamo eyomeleleyo, ukhuseleko lwamagnetic luhamba nge-DC, kwaye impendulo ihlala kwangoko.Njengabaphuli beesekethe ze-AC, i-DC i-circuit breakers inomthamo wokuqhawula olinganiselweyo omele owona mbane ubalulekileyo okhoyo onokuphazanyiswa.
Inyaniso yokuba ukumiswa kwangoku kuqhubekayo kunye ne-DC circuit breakers kuthetha ukuba i-breaker circuit kufuneka ivule uqhagamshelwano lombane kude ukuphazamisa i-fault current.Umlindi wokhuseleko wemagnethi wesaphuli sesekethe yeDC ngokuchasene neesekethe ezimfutshane kunye neempazamo ezibanzi kakhulu kunomthwalo ogqithisileyo.
Iindidi eziNtathu zoMqhekeki weSekethe encinci:
Uhlobo B (uhambo ngama-3-5 amaxesha alinganiswe ngoku).
Uhlobo C (uhambo ngama-5-10 amaxesha alinganiswe ngoku).
Uhlobo D (uhambo kwi-10-20 amaxesha alinganiswe ngoku).
Ixesha lokuposa: Oct-24-2022