Siet manufactures and sells all over the world high voltage electromechanical transformers from 1000 to 15000V with working current from 25 to 200mA.

Metalbox is the famous model in metal casefor outdoor use and Lexterior is the model with thermoplastic case suitable mostly for indoor use.

Siet also produces protection devices as Distop (single protection), Interdistop (double protection) , Distop Modulare (modular protection) and capacitors.