Identifying SiC Arresters

The identification of old Porcelain Housed SiC Arresters is not difficult if a few guidelines are followed.

1. Color If the porcelain is brown and located in the US, it will likely be a SiC arrester. A closer inspection is warranted. If the color of the porcelain is gray and the date on the nameplate is earlier than 1987 then could be a SiC arrester.
2. Size Height If the arrester is as tall or taller than the transformer bushing it is next to, it is most likely a SiC Arrester.
3. Manufacturing Date If it was manufactured before 1977, it will be a SiC arrester If it is manufactured between 1977-1987 it is possibly a SiC type arrester and warrants a closer look.
4. If the name on the name plate is as follows, it will be a SiC arrester:
   
   McGraw Edison and Line Material Type G, Type F, Type SS, Type E , Type RP and RP2
   
   Ohio Brass Thorex Arrester, Dynagap, Multirester, Type DAIII and Type DAIV
   
   
   GE Thyrite Arrester, Alugard
   
   
   Westinghouse Surgemaster, Type CLP, Type SV, SV, LVBB, Autovalve
   
   
   Joslyn Type Q, Type J, Type RS

Click here for a visual guide