Dairyland Electrical Industries, Inc.
Over a range of industries and applications, Dairyland has been applying the concepts of isolation, grounding, and over-voltage protection to standard and custom products since 1983. Dairyland deals with a wide variety of applications across multiple industries including oil and gas, power utility, railroad, and others where it is necessary to provide simultaneous isolation and safety grounding. Dairyland products isolate DC current, ground AC fault current and lightning, and protect equipment and personnel.
Product: Overwatch HEFPD
https://www.dairyland.com/product/overwatch_hefpd/