Cov ntawv thov ntawm high-voltage load switches sib haum mus rau lawv cov yam ntxwv ntawm cov qauv. Structurely, load keyboards poob rau hauv ob pawg thawj: thawj yog tsim los rau kev ywj pheej mounting ntawm phab ntsa los yog kev txhawb nqa cov qauv, featuring ib qho kev tsim kho zoo ib yam li lub disconnector (isolating hloov); Qhov thib ob yog tsim los rau kev txhim kho nyob rau hauv siab -voltage switchgear txees-tshwj xeeb yog cov siv lub tshuab nqus tsev lossis SF6 gas technology-thiab dais ib qho zoo ib yam li lub Circuit Court breaker. Kev siv hluav taws xob tag nrho ntawm qhov hloov pauv hloov pauv ua ke ua ke ntawm ob qho tib si ntawm cov qauv no.
Thaum lub load hloov nyob rau hauv "qhib" txoj hauj lwm, nws -zoo li ib tug disconnector - nthuav qhia qhov pom tseeb ntawm hluav taws xob sib cais; nws thiaj li ua haujlwm rau kev cais hluav taws xob. Qhov no muab qhov tsim nyog yuav tsum tau ua ua ntej kom ntseeg tau tias muaj kev cuam tshuam hluav taws xob zoo rau cov khoom siv lossis cov kab hluav taws xob uas tab tom kho lossis de- zog.
Load keyboards yog nruab nrog ib tug rudimentary arc -extinguishing mechanism, ua rau lawv cuam tshuam thiab ua (kaw) load tam sim no ntog nyob rau hauv lub ntaus ntawv tus kheej rated peev xwm tam sim no. Yog li ntawd, lawv tuaj yeem siv los hloov pauv hloov pauv, lub tsev txhab nyiaj capacitor, thiab cov kab xa tawm ntawm cov peev txheej tshwj xeeb. Hauv qee qhov chaw muaj kev lag luam, qhov chaw ua haujlwm transformer nyob ntawm qhov deb ntawm qhov siab -voltage faib chav tsev lub ntsiab Circuit Court breaker, qhov pom tseeb ntawm kev sib txuas yuav tsis pom nyob rau hauv chav transformer nws tus kheej thaum lub hwj chim -tawm txheej txheem. Nyob rau hauv cov xwm txheej zoo li no, lub siab -voltage load switch feem ntau ntsia ncaj qha rau ntawm phab ntsa ntawm chav tsev transformer; Qhov kev npaj no tso cai rau lub zos hloov pauv ntawm lub transformer tsis muaj -load tam sim no thaum ib txhij muab qhov pom ntawm qhov kev sib txuas, yog li ua kom muaj kev nyab xeeb thiab kev ntseeg siab ntawm lub hwj chim- tawm haujlwm.
Thaum ua ke nrog siab -voltage fuses, lub tshuab hloov pauv tuaj yeem ua haujlwm tau zoo raws li lub tshuab hluav taws xob hluav taws xob uas muaj qhov tsis raug txwv - tam sim no cuam tshuam muaj peev xwm. Hauv qhov kev teeb tsa no, qhov hloov pauv hloov nws tus kheej yog lub luag haujlwm ua thiab rhuav tshem cov haujlwm ua haujlwm ib txwm muaj, thaum lub siab -voltage fuses tau ua haujlwm nrog cuam tshuam luv luv - Circuit Court tam sim no. Feem ntau, cov khoom siv thauj khoom ua haujlwm hauv cov ntawv thov no yog lub tshuab nqus tsev lossis SF6 roj hom; Tag nrho lub nplhaib tseem ceeb sib dhos tseem nyob hauv qhov loj thiab muaj peev xwm txhawb kev hloov pauv nrog lub peev xwm siab tshaj plaws txog li 1250 kVA.