Dairyland Electrical Industries Dairyland Electrical Industries has served the energy, corrosion, and electrical service industries since 1983, with innovative solid-state products for DC isolation, AC grounding, and lightning protection. Offering the first solid-state solutions to each of these markets, Dairyland’s conservative designs lead to proven long life and maintenance-free operation. Industry proven products such as the Polarization Cell Replacement (PCR), Solid-State Decoupler (SSD) and the Ove...