Hauv lub tshuab nqus tsev cuam tshuam, kev tswj hwm qhov siab -tam sim no arc tseem ceeb heev rau kev ua haujlwm ntawm switchgear. Qhov sib nqus teb tsim ntawm kev sib cuag muaj ob txoj hauv kev: longitudinal magnetic field (AMF) thiab transverse magnetic field (TMF). Qhov no tsis yog ib qho teeb meem ntawm superiority los yog inferiority, tab sis yog ib tug rational xaiv raws li nyob rau hauv daim ntawv thov scenario.
Longitudinal Sib Nqus Field (AMF) - Tso cai rau Arc rau "Diffuse"
Thaum cov kev taw qhia magnetic teb yog sib npaug rau cov kev taw qhia tam sim no, lub arc plasma nyiam sib npaug sib npaug raws li lub zog ntawm Lorentz quab yuam, tsis txhob muaj kev cog lus hauv zos. This "diffuse" arc significantly reduces the energy density on the contact surface, thereby reducing ablation and significantly improving the high-current breaking capacity. Yog li ntawd, AMF tiv tauj yeej nyob rau hauv siab -voltage (xws li, siab dua 72.5kV) thiab siab - muaj peev xwm (40kA thiab siab dua)Lub tshuab nqus tsev Circuit Court breakers. Ntau cov khoom siv hluav taws xob thoob ntiaj teb siab - cov khoom siv hluav taws xob tau txais cov thev naus laus zis no kom ntseeg tau tias muaj kev tawg.
Transverse Magnetic Field (TMF) - Ua qhov Arc "Rotate"
Thaum lub magnetic teb kev taw qhia yog perpendicular mus rau tam sim no cov kev taw qhia, lub arc yog tsav los ntawm magnetic blowing quab yuam, rotating ntawm kev kub ceev raws li qhov sib cuag phaj nto. Qhov no dynamic motion disperses lub arc tshav kub nyob rau hauv ib tug loj cheeb tsam, tiv thaiv overheating ntawm lub taag point. TMF muaj cov qauv yooj yim, me me qhov siab, thiab tsis tshua muaj hluav taws xob tiv thaiv, uas muaj txiaj ntsig zoo rau kev ua haujlwm me me ntawm arc - tua chamber thiab txo cov nqi tsim khoom. TMF tsim muaj nyob rau hauv nruab nrab-voltage (12 ~ 24kV) thiab nruab nrab luv luv-circuit tam sim no (31.5kA thiab qis dua) switchgear, tshwj xeeb tshaj yog haum rau qhov chaw- txwv lossis nquag ua haujlwm.
Yuav xaiv li cas?
Qhov kev txiav txim siab feem ntau yog nyob ntawm qhov ntsuas hluav taws xob, tawg tam sim no, thiab kev ua haujlwm ntawm lub neej. High-voltage, siab- muaj peev xwm AMF yog qhov zoo dua los xyuas kom meej cov npoo tawg; nruab nrab- thiab qis-voltage, kev lag luam TMF yog qhov zoo dua los txhim kho qhov loj me thiab tus nqi. Nyob rau hauv xyoo tas los no, cov cuab yeej sib nqus hlau nplaum sib xyaw (sib txuas AMF thiab TMF) tau dhau los ua qhov kev tshawb fawb hotspot, sim ua kom zoo ntawm ob qho tib si. Txawm hais tias xaiv txoj hauv kev twg los xij, lub hom phiaj kawg yog los muab qhov kev nyab xeeb tshaj plaws thiab kev siv nyiaj txiag zoo tshaj plaws rau kev ua haujlwm tshwj xeeb- lo lus teb rau lo lus nug "xaiv xaiv" no ib txwm muaj nyob rau hauv daim ntawv thov.
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