Lub surge protector (SPD) yog cov cuab yeej tiv thaiv tshwj xeeb tsim los txhawm rau tiv thaiv cov hluav taws xob dhau mus thiab coj kev nyab xeeb ntawm cov dej ntws tawm. Nws ua lub luag haujlwm tiv thaiv tseem ceeb hauv lub zog niaj hnub no, kev sib txuas lus, thiab kev siv tshuab automation. Nws cov txiaj ntsig tseem ceeb nyob hauv nws cov lus teb sai thiab qis - txoj kev impedance, txwv siab - lub zog hloov pauv hloov pauv los ntawm xob laim tawm tsam, kev ua haujlwm dhau qhov hluav taws xob, lossis daim phiaj hloov mus rau hauv cov khoom siv tau zoo, yog li tiv thaiv kev puas tsuaj rau cov khoom siv hluav taws xob thiab cov tshuab tseem ceeb.
Nyob rau hauv cov nqe lus ntawm kev khiav hauj lwm hauv paus ntsiab lus, surge protectors yog feem ntau txuas nyob rau hauv parallel mus rau lub hwj chim mov los yog teeb liab Circuit Court ntawm cov khoom tiv thaiv. Thaum lub sijhawm hloov hluav taws xob ntau dhau qhov kev teeb tsa tshwm sim hauv kab, cov khoom tsis sib xws hauv SPD (xws li varistors (MOVs), cov pa roj tawm (GDTs), lossis cov hluav taws xob hloov hluav taws xob tsis zoo (TVSs) sai sai hloov ntawm qhov siab -tsis kam lub xeev mus rau qhov qis -tsis kam lub xeev, 3} txoj kev tawm tam sim no rau hauv av qis los yog ib tug bypass, tswj cov khoom siv hluav taws xob qhov hluav taws xob nyob rau hauv ib qho kev nyab xeeb theem thaum lub sij hawm mem tes ploj mus, cov khoom yuav rov qab mus rau ib tug siab -kuj lub xeev, tsis muaj kev cuam tshuam lub zog ntawm lub Circuit Court, qhov no "kev coj nyob rau hauv kev nyuaj siab, kev sib cais nyob rau hauv ib txwm tej yam kev mob" tus yam ntxwv tso cai rau nws mus zoo tiv thaiv surges yam tsis muaj kev cuam tshuam nrog ib txwm ua haujlwm.
Raws li daim ntawv thov scenarios thiab cov khoom tiv thaiv, surge protectors tuaj yeem muab faib ua ob pawg: lub zog SPDs thiab teeb liab SPDs. Lub zog SPDs feem ntau yog siv hauv AC lossis DC lub zog xa hluav taws xob, thiab tau muab faib ntxiv rau hauv Hom 1 (tsev nkag theem), Hom 2 (chav faib lub thawv), thiab Hom 3 (khoom siv kawg theem) raws li lawv qhov chaw teeb tsa, ua haujlwm hauv qib kom ua tiav ntau- theem kev tiv thaiv thaum ntsuas qhov hluav taws xob tam sim no thiab cov khoom siv hluav taws xob seem. Lub teeb liab SPDs, ntawm qhov tod tes, yog tsim los rau cov hluav taws xob tsis muaj zog tam sim no xws li kev sib txuas lus, kev sib txuas lus, thiab kev tswj cov teeb liab, yuav tsum muaj kev txwv voltage thaum tswj cov teeb liab kis tau zoo; yog li ntawd, lawv tau tsim tshwj xeeb hauv cov qauv thiab cov yam ntxwv ntawm bandwidth.
Qhov kev ua tau zoo ntawm tus tiv thaiv surge nyob ntawm ob peb lub ntsiab lus tseem ceeb: qhov nominal tawm tam sim no (In) thiab qhov siab tshaj tawm tam sim no (Imax) cuam tshuam nws lub peev xwm tawm; qib tiv thaiv hluav taws xob (Up) txiav txim siab qhov siab tshaj qhov seem seem uas cov cuab yeej tiv thaiv tuaj yeem tiv taus; lub sij hawm teb luv luv, qhov ua tau zoo dua nws tuaj yeem cuam tshuam surges hauv ntau nanosecond; Tsis tas li ntawd, qhov ntsuas kev khiav hauj lwm voltage, kev ua haujlwm tsis tu ncua tam sim no, thiab kev hloov pauv ib puag ncig (xws li qhov ntsuas kub thiab qib kev tiv thaiv) kuj cuam tshuam rau nws txoj kev ntseeg tau.
Hauv kev siv cov tswv yim, surge protectors (SPDs) tau siv dav hauv kev tsim hluav taws xob tiv thaiv, kev tswj hwm kev lag luam, kev sib txuas lus hauv paus chaw nres tsheb, cov ntaub ntawv chaw, thiab lub zog tshiab. Kev xaiv thiab kev teeb tsa kom raug yuav tsum xav txog qhov kev siv cua daj cua dub hauv cheeb tsam, cov txheej txheem hauv av, thiab cov cuab yeej tiv taus qhov hluav taws xob, thiab ua raws li txoj cai sib koom ua ke kom tsis txhob muaj kev tiv thaiv qhov muag tsis pom kev. Nyob rau tib lub sijhawm, SPD qhov qhia txog qhov xwm txheej thiab kev degradation yuav tsum tau kuaj xyuas tsis tu ncua, thiab cov qauv ua tsis tiav yuav tsum tau hloov tam sim ntawd kom muaj kev tiv thaiv tsis tu ncua thiab muaj txiaj ntsig.
Raws li thawj kab ntawm kev tiv thaiv ib ntus overvoltages, surge protectors, nrog rau lawv cov lus teb ceev ceev, tsis tshua muaj hluav taws xob seem, thiab kev ntseeg siab, muab kev lav zoo rau kev nyab xeeb ntawm kev siv hluav taws xob niaj hnub thiab cov ntaub ntawv. Lawv qhov tseem ceeb yog qhov tseem ceeb hauv lub sijhawm no ntawm kev siv hluav taws xob siab thiab kev sib txuas.
