Zinthu zinayi zofunika kwambiri pa chipangizo choteteza ma surge (SPD)

Chipangizo choteteza kukwera (SPD) ndi chipangizo chamagetsi chomwe chimapereka chitetezo chachitetezo pazida zosiyanasiyana zamagetsi, zida, ndi mizere yolumikizirana. Pamene mphamvu yamagetsi kapena magetsi awonjezeka mwadzidzidzi m'mizere yamagetsi kapena mizere yolumikizirana chifukwa cha kusokonezedwa kwakunja, choteteza mafunde chimatha kuyendetsa ndikusinthira mafunde mwachangu kuti chisawononge zida zina zomwe zili mu dera. Pali magawo anayi ofunikira oti muganizire pofufuza SPD:

1. Voliyumu yogwira ntchito yopitilira (Uc) Uc imatanthauza voliyumu ya maximum rms (RMS) kapena voliyumu ya DC yomwe ingagwiritsidwe ntchito pa SPD protection mode. Kwenikweni, imayimira voliyumu yoyesedwa ya SPD. Mtengo wa Uc umagwirizana ndi moyo wautumiki ndi mulingo woteteza voliyumu wa SPD. Ngakhale kusankha mtengo wapamwamba wa Uc kungakulitse moyo wautumiki wa chinthucho, kudzawonjezeranso voliyumu yotsalira, zomwe zimawononga chinthu chotetezedwa.

2. Mphamvu yotulutsa madzi (In) In ndi mphamvu yapamwamba kwambiri ya mafunde a 8/20μs omwe akuyenda kudzera mu chitetezo cha surge. Muyezo wa SPD umatchula mndandanda wa ma values ​​a In. Popanga ndi kupanga chitsanzo china cha SPD kuti chifike pamlingo winawake, mtengo wofanana wa In umasankhidwa kuchokera mu mndandanda wa In kuti uyesedwe. Mayeso opambana amatsimikiza mtengo wosankhidwa ngati mtengo wa In wa SPD.

3. Mphamvu yotulutsa mphamvu yayikulu mu mayeso a kalasi II (Imax) Imax ikuyimira mphamvu yayikulu ya mafunde a 8/20μs omwe akuyenda kudzera mu chitetezo cha surge mu mayeso a kalasi II. Ngakhale tanthauzo la gawoli likufanana ndi mphamvu yotulutsa mphamvu yeniyeni (In), muyezo wa SPD umapereka mitundu yosiyanasiyana ya mavoliyumu a Imax pafupi ndi mndandanda wa In, ndipo mkati mwa mulingo womwewo, Imax > In. Chifukwa chake, SPD yopambana mayeso pa mulingo winawake wa In sizikutsimikizira kuti SPD yokhala ndi mulingo womwewo wa Imax idzapambananso mayesowo. Ngakhale kuti In ndi Imax zonse ndi mavoliyumu apamwamba a mafunde a 8/20μs, mtengo wapamwamba komanso kuchuluka kwa nthawi zomwe mphamvu imadutsa panthawi yoyeserera ndizosiyana.

4. Mlingo woteteza ma voltage (Kukwera), womwe umadziwikanso kuti voltage yotsalira, umatanthauza ma voltage kudutsa SPD pamene magetsi okhala ndi mawonekedwe enaake akuyenda kudzera mu SPD SPD itayamba. Gawoli ndi lofunika kwambiri kuteteza ma voltage opirira a zida zotetezedwa ndipo liyenera kukhala lotsika kuposa ma voltage opirira a zida zotetezedwa.

Kumvetsetsa ndi kusanthula magawo awa ndikofunikira kwambiri pazida zotetezera ma surge. Kuganizira bwino ndikusankha ma SPD kutengera magawo awa kudzaonetsetsa kuti amapereka chitetezo chogwira mtima pazida zamagetsi, zida ndi mizere yolumikizirana, potsirizira pake kuchepetsa kuwonongeka kwa ma surge ndi ma spikes.