Dairyland Electrical Industries is the world’s leading manufacturer of solid-state decoupling products used to isolate cathodically protected structures from grounding systems or other equipment, while simultaneously providing safety grounding for AC fault current and lightning.
This paper provides an overview of why over-voltage protection on isolation joints is needed, as well as a brief description of the two most common protection technologies – spark gaps and solid-state DC decouplers.
This paper provides specific information on decoupler installation to solve facility CP problems, including connections, possible bypasses, practices, and codes.