Amadivayisi Wokuvivinya Amazinga (I-SPD) isetshenziselwa ukuvikela imishini kagesi ngokumelene nama-surges (ukuvuvukala) okubangelwa ukukhanyisa noma ukushintshwa kwemishini yemishini esindayo (abantu abaningi bangase bangazinaki lokhu). Kungathatha imvelaphi yezobuchwepheshe lapho ukhetha idivayisi efanele yokuvikela ukuqhuma njengoba kunezinhlobo ezahlukene zobuchwepheshe nemigomo.
I standard ye-IEC 61643 ichaza izinhlobo ze-3 zokusebenzisa ama-protective device for low power voltage system.
Thayipha i-1 noma i-Class I: Thayipha i-1 SPD ingafaka umbane oqinile wamanje futhi ifakwe emshinini wokushintsha kagesi uma isakhiwo sivikelwe uhlelo lokuvikelwa ngombani (induku yombani, phansi umqhubi nomhlabathi).
Thayipha i-2 noma i-Class II: Le divayisi yokuzivikela yokuvikela (SPD) iklanyelwe ukukhipha okwamanje okwenziwe ngombani ongaboni ngokuqondile owabangele ukuqhubekela phambili kwe-network yokusabalalisa amandla. Ngokujwayelekile, zifakwe kushintsho lokushicilela okuyinhloko. Thayipha i-2 SPD yi-SPD ethandwa kakhulu emakethe futhi i-Prosurge ibahlinzeka ngezitifiketi ezahlukene.
Thayipha i-3 noma i-Class III: Thayipha i-3 SPDs eklanyelwe ukunciphisa ukuvuthwa kwezimbonini zemishini ebucayi futhi ngakho-ke kunomthamo wamanje okhishwayo okhishwayo.
I-SPD kufanele ifakwe kuphi?
Thayipha idivayisi ye-2 yokuvikela izofakwa efomini lokushintshela lokungena lokugcina kagesi. Uma ibanga eliphakathi kwalolu cingo oluvikelayo futhi imishini evikelwe idlula amamitha angu-30, idivayisi yokuzivikela eyengeziwe (Uhlobo lwe-2 noma uhlobo lwe-3) kufanele ifakwe eduze nemishini.
Lapho isakhiwo sivikelwe uhlelo lokuvikela umbane, a Thayipha idivayisi ye-1 yokuvikela kufanele ifakwe ekugcineni okungenayo kokufakwa. Futhi, ungakhetha uhlobo lwe-1 + 2 SPD noma uhlobo lwe-1 + 2 + 3 SPD njengoba lungaphinde linciphise ukunqwabelana nokugcina izindleko ezithile kwezinye izimo.
Yisiphi ukukhishwa kwamanje okwanele? Okuphakeme kuncono?
Ukuze Thayipha amadivayisi wokuzivikela we-1, isidingo esincane singumthamo wokukhishwa kwe-Iimp = 12.5 kA (10 / 350). Umshini ojwayelekile wokukhishwa kwamanje Thayipha i-2 SPD yi-40kA. Qaphela ukuthi ukukhishwa okusha okuphezulu akusho ukuthi kungcono. Kusho nje ukuthi i-SPD ikwazi ukukhuthazelela ukuqhuma okuningi futhi ngaleyo ndlela ingaba nesikhathi eside sokuphila futhi ngaleyo ndlela idinga ukushintshwa okuncane. Yiqiniso, kuhamba ngentengo ephakeme:)
Indlela yokuxhumanisa idivayisi yokuzivikela yokukhuphuka ne-breaker noma i-fuse?
Kuya ngesikhashana sesifunda samanje esingahle senzeke endaweni yokufaka. Umthetho wesithupha, webhodi yokuguqulela kagesi yokuhlala, kuzokhethwa idivaysi yokuvikela ene-Isc <6 kA futhi uma ufaka izicelo zehhovisi, i-Isc ngokuvamile ingu <20 kA.
Vele, ungahlola futhi ukucaciswa kwe-SPD nokufakwa kwayo. Lolu lwazi luyadingeka ukukhetha idivayisi efanele yokwenza isipele.
