Ako koristis jedan varistor (izmedju faze i nule) onda je dovoljan jedan osigurac.
Posto je produzni u pitanju, osigurac moze biti na fazi ili nuli - zavisi kako okrenes uticnicu.
Ako stavljas 3 varistora - ja bi stavio jos jedan osigurac - na nulu, tj. na drugu zicu.
Citat:
The National Fire Protection Association (NFPA) has documented many cases of catastrophic fires that have been caused by MOV devices in surge suppressors, and has issued bulletins on the issue.
A series connected thermal fuse is one solution to catastrophic MOV failure. Varistors with internal thermal protection are also available