Momwe chipangizo choteteza ma surge (SPD) chimagwirira ntchito

Zoteteza ku mafunde, zomwe zimadziwikanso kutizipangizo zodzitetezera ku mafunde (SPD), ndi zinthu zofunika kwambiri mu dongosolo lililonse lamagetsi. Amagwira ntchito yofunika kwambiri poteteza zida zamagetsi zomwe zimakhala zovuta kuziwononga chifukwa cha kukwera kwa magetsi ndi kusintha kwa magetsi. Munkhaniyi, tifufuza momwe zoteteza ma surge zimagwirira ntchito komanso mfundo zomwe zimathandizira kuti zigwire ntchito.

Mwachidule, choteteza ma surge chimachepetsa mphamvu yamagetsi yosinthasintha ndikubweza mphamvu yamagetsi kubwerera ku gwero lake kapena pansi pamene mphamvu yamagetsi yosinthasintha ichitika pa dera lotetezedwa. Izi zimachitika pogwiritsa ntchito gawo limodzi losakhala la mzere lomwe limasintha pakati pa mphamvu yamagetsi yokwera ndi yotsika pansi pa mikhalidwe yosiyanasiyana. Pa nthawi yamagetsi yogwira ntchito bwino, choteteza ma surge chimakhalabe mu mphamvu yamagetsi yokwera ndipo sichikhudza dongosolo. Komabe, pamene mphamvu yamagetsi yocheperako ichitika, choteteza ma surge chimalowa mu mphamvu yamagetsi (kapena mphamvu yamagetsi yotsika) ndikubweza mphamvu yamagetsi yobwerera ku gwero lake kapena pansi, zomwe zimapangitsa kuti mphamvu yamagetsi ichepetse kapena kutseka bwino. Mphamvu yamagetsi ikatha, choteteza ma surge chimabwereranso ku mphamvu yake yamagetsi yokwera.

Chipangizo choteteza ma surge chimakhala ndi gawo limodzi losachepera mzere monga varistor kapena spark gap yomwe kukana kwake kumasintha ndi magetsi omwe amagwiritsidwa ntchito. Zigawozi zimapangidwa kuti zisinthe mafunde otuluka kapena ma pulse currents ndikuchepetsa ma overvoltage mu zida zotsika. Pakugwira ntchito kwabwinobwino, choteteza ma surge sichikhudza dongosololi ndipo chimagwira ntchito ngati dera lotseguka, kusunga padera pakati pa active conductor ndi dziko lapansi. Komabe, pamene voltage surge ichitika, chipangizo choteteza ma surge chimachepetsa impedance yake ndikusuntha ma surge current mkati mwa nanoseconds ochepa. Chimachita ngati dera lotsekedwa, kuchepetsa ma overvoltage ndikuchepetsa kufika pamlingo wovomerezeka ku zida zamagetsi zolumikizidwa zotsika.

Mfundo yogwirira ntchito ya zoteteza ma surge ndi yofunika kwambiri poteteza makina amagetsi ndi zamagetsi ku zotsatirapo zoyipa za ma surge amagetsi. Akaphatikizidwa mu makina amagetsi, zoteteza ma surge zimapereka chitetezo chodalirika ku zochitika zosakhalitsa zomwe zingayambitse kulephera kwa zida, nthawi yogwira ntchito, komanso kukonza kokwera mtengo. Mwa kuchetsa ndi kuchepetsa ma overvoltage, zoteteza ma surge zimathandiza kuonetsetsa kuti zida zodziwikiratu zikugwira ntchito mobwerezabwereza, zomwe zimapangitsa kuti kudalirika kukhale kwakukulu komanso kuchepetsa ndalama zokonzera.

Pomaliza, zoteteza ma surge, kapena ma SPD, ndi zinthu zofunika kwambiri zomwe zimapereka chitetezo chofunikira pamakina amagetsi ndi zamagetsi. Pomvetsetsa mfundo yogwirira ntchito ya zoteteza ma surge, zimamveka bwino momwe zimathandizira kuteteza zida ku zotsatira zoyipa za ma surge ndi transiently. Popeza zimatha kuchepetsa ma overvoltage ndikusinthitsa ma surge currents, zoteteza ma surge ndizofunikira kwambiri pakuwonetsetsa kuti zida zodziwikiratu zikugwira ntchito komanso kudalirika. Motero, kuphatikiza zoteteza ma surge mumakina amagetsi ndi njira yothandiza komanso yotsika mtengo yochepetsera zoopsa zokhudzana ndi ma surge ndi zochitika zosakhalitsa.