Dhismaha iyo Muuqaalka
Nidaamka beddelka karootada gaarka ah- waa sahlan tahay in la beddelo karootada iyada oo aan waxyeello loo geysanSPDsaldhig.
Isticmaalayaashu uma baahna inay ka saaraan daboolka daboolka marka ay bedelayaan kartoonada.
Calaamadeynta heerka naaxinta varistor's (signationization green-cas) oo muujinaya baahida beddelka ee kartuunada weli shaqaynayo ka hor fashilka kama dambaysta ah iyo goynta SPD.
Digniin fogaansho la'aan iyada oo aan wax diyaargarow gaar ah lahayn. Mid kasta oo ka mid ah SPD-yadayada ayaa suurtagal ah in lagu daro qalabka digniinta fog wakhti kasta. Nooca hore ee calaamadaynta waa in lagu daraa ka hor inta lagu jiro wax soo saarka, markaa isticmaalayaashu waxay u baahan yihiin inay horay u sii ogaadaan alaabooyinka ay u baahan doonaan signalization sidaas darteed waxay u baahan yihiin inay sii wadaan kaydka sare ee ka cabanaya dabacsanaan hooseeya.