I-SPD(Idivayisi Evikela Ukukhuphuka, isivikelo sokukhuphuka) isetshenziswa kakhulu ukuvimbela ukukhuphuka kwamandla kagesi okudlulayo okubangelwa ukushaywa kombani noma imisebenzi yokushintsha igridi ekulimazeni imishini. Amanani nezindawo ezifanele ze-SPDS ezenziwe ngezinto nezakhiwo ezahlukene ziyahlukahluka.

Ingxenye evamile eyinhloko ye-SPD yi-zinc oxide varistor (MOV), enentengo ephansi futhi inesivinini sokuphendula ngokushesha. Isetshenziswa kabanzi ekuvikeleni izakhiwo zokuhlala, izakhiwo zezentengiselwano, amakhabethe okusabalalisa kanye nemishini yezimboni. Intengo ye-MOV type SPD yokusatshalaliswa kwe-common low-voltage ngokuvamile isukela kumashumi kuya kumakhulu ama-yuan.

I-SPD esebenzisa amashubhu okukhipha igesi (i-GDT) inamandla aphezulu okuthwala ugesi kanye nokusebenza kokuvikela, futhi ifanelekela ukuvikelwa kwemigqa yamandla abuthakathaka eziteshini zokuxhumana, izikhungo zedatha, izinhlelo zokuphepha, njll. Intengo yayo ivame ukuba phezulu kuneyemikhiqizo evamile ye-MOV.

Imikhiqizo ye-SPD ephezulu izosebenzisa isakhiwo esihlanganisiwe se-MOV+GDT. Eminye imikhiqizo ifakwe namadivayisi okuhamba ngokushisa, izinkomba zamaphutha kanye nemisebenzi ye-alamu ekude, enikeza ukuphepha okuphezulu nokuthembeka. Ifaneleka ezindaweni ezibalulekile njengezibhedlela, izinhlelo zikagesi, ezokuthutha ngesitimela, iziteshi zikagesi ze-photovoltaic kanye nezinhlelo zokulawula ukuzenzekela kwezimboni, ngamanani asukela kumakhulu amaningana kuya kuzinkulungwane eziningana zama-yuan.

Ezindaweni ezivamile zamahhovisi, izindawo zokuhlala kanye nezitolo, i-MOV type SPDS ejwayelekile ingakhethwa. Ezindaweni ezinemisebenzi yombani ovamile, amakamelo okuxhumana, izikhungo zedatha kanye namaphrojekthi abalulekile ezimboni, kunconywa ukukhetha i-SPDS enamandla ahlanganisiwe noma aphezulu ukuze kuthuthukiswe ukuvikelwa kombani kanye namakhono okuvikela umbane ngokweqile kohlelo nokuqinisekisa ukusebenza okuzinzile kwesikhathi eside kwemishini.

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