Abaphuli beeSekethe zeTyala eziMolded (MCCBs): Intshayelelo yoKhuseleko loMbane
Ukhuseleko lombane lubaluleke kakhulu kuzo zonke iimboni kunye namacandelo. Izixhobo ezininzi kunye neendlela ziye zaphuhliswa ukukhusela izixhobo, oomatshini kunye nabantu kwiingozi ezinokubakho zombane. Esinye sezixhobo ezinjalo esidlala indima ebalulekileyo kukhuseleko lombane yii-molded case circuit breaker (MCCB).
II-MCCByinxalenye ebalulekileyo yesekethe eyenzelwe ukubonelela ngokhuseleko oluzenzekelayo kwi-overcurrent, ii-short circuits, kunye nezinye iingxaki zombane. Isetyenziswa kakhulu kwiindawo zokuhlala, zorhwebo kunye nezoshishino ukukhusela iinkqubo zombane ekonakalisweni kunye nokuthintela umngcipheko wemililo yombane.
IiMCCBzibizwa ngokuba “ziikheyisi ezibunjiweyo” kuba zigcinwe kwibhokisi yeplastiki eqinileyo enika ubushushu kunye nokhuseleko. Eyaziwa ngokuxhathisa kwayo kakhulu kubushushu, umswakama kunye nokuguquguquka kwamandla ombane, le nto yeplastiki ye-thermoset ifanelekile ukugcina izixhobo zokukhusela umbane ezintsonkothileyo.
Indlela yangaphakathi yesixhobo sokwaphula isekethe esibunjiweyo iqulathe izinto ezimbini eziphambili: iyunithi yokuhamba kunye nezixhobo zokunxibelelana ezithwala umbane. Iyunithi yokuhamba isebenza njengobuchopho bomntu.I-MCCB, isoloko ijonga umsinga ohamba kwisekethe. Kwimeko yoxinzelelo olukhulu okanye isekethe emfutshane, iyunithi yokuhamba ibangela ukuba oonxibelelwano bavuleke, iphazamise ukuhamba kombane kwaye ihlukanise isekethe enengxaki. Oonxibelelwano abathwala umsinga benziwe ngezinto ezisemgangathweni ophezulu eziqinisekisa ukumelana okuncinci koqhagamshelwano kwaye zibonelela ngombane ogqwesileyo.
Enye yezona nzuzo ziphambili zeI-MCCByi-trip current yayo ehlengahlengiswayo. Ngokungafaniyo neefusi zemveli, ii-MCCB zivumela umsebenzisi ukuba amisele i-trip current oyifunayo ngokusekelwe kwiimfuno ezithile zomthwalo. Oku kuguquguquka kwenza ii-MCCB zifaneleke kwiintlobo ngeentlobo zezicelo ukusuka kwiisekethe zokukhanyisa ezine-voltage ephantsi ukuya koomatshini bemizi-mveliso abanamandla aphezulu.
Ukwengeza,I-MCCByaziwa ngokukwazi kwayo ukuqhekeza kakuhle. Le yeyona mbane iphezuluI-MCCBiyakwazi ukuyiphatha ngaphambi kokuba ikhubeke kwaye iphazamise isekethe. Ii-MCCB zenzelwe ukujongana nemisinga yesekethe emfutshane ephezulu kwaye zibonelele ngokhuseleko oluthembekileyo lweziphene zombane, zinciphisa umngcipheko wokonakala kwezixhobo kunye neengozi zombane.
Ukongeza kumthamo ophezulu wokuqhekeza, uninzi lwanamhlanjeIiMCCBzibonelela ngeempawu eziphambili ezifana nokukhubeka kobushushu kunye nemagnethi, ukhuseleko lweziphene zomhlaba kunye nokukwazi ukulawula kude. Ezi mpawu zonyusa ukhuseleko kunye nokusebenza kakuhle kwenkqubo yombane, zivumela ukubonwa ngokukhawuleza kunye nokwahlulwa kweziphene, zinciphisa ixesha lokungasebenzi kunye nomonakalo onokubakho.
Ngenxa yoyilo lwayo oluncinci kunye neempawu ezisebenziseka lula, ii-MCCB kulula ukuzifaka nokuzilungisa. Oku kuzenza zibe lukhetho lokuqala lweengcali zombane kunye neengcali, ngelixa ziqinisekisa ukusebenza kakuhle kunye nokuphendula ngokukhawuleza xa umbane ungasebenzi.
Ukushwankathela,ii-molded case circuit breakers (ii-MCCB)zidlala indima ebalulekileyo ekuqinisekiseni ukhuseleko lombane kunye nokukhusela iinkqubo zombane kumonakalo we-overcurrent kunye ne-short circuit. Umbane wazo wokuhamba ohlengahlengiswayo, amandla aphezulu okuqhekeka kunye neempawu eziphambili zenza ukuba zibe lukhetho oluthembekileyo noluguquguqukayo lwezicelo eziqala kwizakhiwo zokuhlala ukuya kwizakhiwo ezinkulu zoshishino. Ngokutyala imali kwi-molded case circuit breakers, abantu kunye namashishini banokubeka phambili ukhuseleko lombane, banciphise iingozi ezinokubakho, kwaye baqinisekise ukusebenza kakuhle kweenkqubo zabo zombane.
Ixesha lokuthumela: Agasti-30-2023