Indlela esisebenza ngayo isixhobo sokukhusela ukuvuza (i-SPD)

Izikhuseli zokugquma, ezaziwa ngokubaizixhobo zokukhusela ukukhukhumala (I-SPD), zizinto ezibalulekileyo kuyo nayiphi na inkqubo yombane. Zidlala indima ebalulekileyo ekukhuseleni izixhobo ze-elektroniki ezibuthathaka kwimiphumo eyonakalisayo yokunyuka kwamandla ombane kunye ne-transients. Kweli nqaku, siza kuhlola indlela ezisebenza ngayo izikhuseli zokunyuka kwamandla kunye nemigaqo esemva kokusebenza kwazo.

Ngokwenyani, isikhuseli sokunyuka sithintela i-voltage yesikhashana kwaye sibuyisela umbane kumthombo okanye emhlabeni xa i-voltage transient isenzeka kwisekethe ekhuselweyo. Oku kufezekiswa ngokusebenzisa ubuncinci icandelo elinye elingelulo ulayini elitshintsha phakathi kwe-impedance ephezulu nephantsi phantsi kweemeko ezahlukeneyo. Ngexesha le-voltage eqhelekileyo yokusebenza, isikhuseli sokunyuka sihlala sikwimeko ye-impedance ephezulu kwaye asiyichaphazeli inkqubo. Nangona kunjalo, xa i-voltage transient isenzeka, isikhuseli sokunyuka singena kwi-conductive state (okanye i-impedance ephantsi) kwaye sibuyisela umbane wokukhuphuka kumthombo okanye emhlabeni, sithintela okanye sibambe i-voltage kwinqanaba elikhuselekileyo. Nje ukuba i-transient iphelile, isikhuseli sokunyuka sibuyela ngokuzenzekelayo kwimeko yaso ye-impedance ephezulu.

Isixhobo sokukhusela ukuvuza siqulethe ubuncinane icandelo elinye elingangqalanga njenge-varistor okanye i-spark gap apho ukumelana kwayo kutshintsha khona xa i-voltage isetyenziswa kuyo. Ezi zixhobo zenzelwe ukujika i-discharge okanye i-pulse currents kunye nokunciphisa i-overvoltages kwizixhobo ezisezantsi. Ngexesha lokusebenza okuqhelekileyo, i-surge protector ayinampembelelo kwinkqubo kwaye isebenza njenge-open circuit, igcina ukuhlukaniswa phakathi kwe-active conductor kunye nomhlaba. Nangona kunjalo, xa kwenzeka i-voltage surge, isixhobo sokukhusela ukuvuza sinciphisa i-impedance yaso kwaye sijika i-surge current kwimizuzwana embalwa. Sisebenza njenge-closed circuit, sijika i-short-circuit overvoltages kwaye sizikhawulele kumanqanaba amkelekileyo kwizixhobo zombane eziqhagamshelwe phantsi.

Umgaqo osebenzayo wezikhuseli zokuxhuzula ubalulekile ekukhuseleni iinkqubo zombane neze-elektroniki kwimiphumo eyonakalisayo yokuxhuzula kwamandla. Xa zidityaniswe kwinkqubo yombane, izikhuseli zokuxhuzula zibonelela ngokhuselo oluthembekileyo kwiziganeko zexeshana ezinokubangela ukusilela kwezixhobo, ixesha lokungasebenzi, kunye nokulungiswa okubiza kakhulu. Ngokujika nokunciphisa ukugqithisela kwamandla, izikhuseli zokuxhuzula zinceda ukuqinisekisa ukusebenza okuqhubekayo kwezixhobo ezinobuthathaka, okukhokelela ekwandeni kokuthembeka kunye nokunciphisa iindleko zokulungisa.

Ukuqukumbela, izikhuseli zokugquma, okanye ii-SPD, zizinto ezibalulekileyo ezibonelela ngokhuseleko olubalulekileyo kwiinkqubo zombane neze-elektroniki. Ngokuqonda umgaqo osebenzayo wezikhuseli zokugquma, kuyacaca indlela ezidlala ngayo indima ebalulekileyo ekukhuseleni izixhobo kwimiphumo eyonakalisayo yokugquma kwamandla kunye neziganeko ezidlulayo. Ngenxa yokukwazi kwazo ukunciphisa i-overvoltages kunye nokujika i-surge currents, izikhuseli zokugquma zibaluleke kakhulu ekuqinisekiseni ukusebenza okuqhubekayo kunye nokuthembeka kwezixhobo ezinobuthathaka. Ngenxa yoko, ukudibanisa izikhuseli zokugquma kwiinkqubo zombane yindlela esebenzayo nengabizi kakhulu yokunciphisa iingozi ezinxulumene nokugquma kwamandla kunye neziganeko ezidlulayo.