This was a $12MM electrical power project. Bath provided all electrical design for a new 138kV/15kV Substation with 138kV switch and circuit breaker yard.

The design included a 15kV substation building with 15kV switchgear and protective relays for the yard and feeder breakers. The substation included two (2) new 37.5/50kVA transformers, neutral ground resistors, yard OCB’s, PT’s, air switches and required structures and foundations.

Bath also performed short circuit studies, power flow studies, and relay and fuse coordination studies for all the 138kV and 15kV main breakers. The protective line relaying was microprocessor-based current differential relays using SEL 411L relays and SEL 311L backup relaying. Additional relaying included Transformer Diff, Arc Flash, and Motor Diff. for a 5500 HP and 11,000 HP.

The project was built while the facility was operating and the loads were cut over in a phased approach with installation of new cable tray systems and 15KV feeder cables throughout the plant.

Bath provided all electrical design and assistance during construction and start up for the electrical system described above. Bath also assisted with the procurement of the major equipment.