Relaying Retrofit

Replace 15 kV OCBs at North Louisville 161/13 kV Substation

Louisville Utilities

Louisville, Mississippi

Atwell & Gent is providing full planning, design, procurement, and construction administration services required for owner to replace existing 15 kV oil circuit breakers and associated electromechanical relays with new 15 kV vacuum circuit breakers with digital protective relays moved to an existing substation control house. Our firm was responsible for the procurement of major equipment (relay panels, relays, cables, etc.), review of vendor submittals and drawings and incorporation of final vendor drawings into the final construction package. Atwell & Gent was responsible for the construction administration of the project, including project coordination and scheduling, field inspections, and substation acceptance testing.

Project Details:

  • Replacement of vacuum circuit breakers with new vacuum circuit breakers and installation of new relay panels and protective relating in the control house.
  • Required programming, logic, testing, and commissioning to ensure proper operation under a variety of system conditions. 
  • Design services included power and control raceways, electrical and controls physical layout and connections (single-line, three-line, schematic wiring, and point-to-point wiring drawings), relay panel drawings, elementary, current and potentials drawings.