The City of Pasadena Power and Water Division was planning to remove Boiler #1 and Boiler #2 from the Broadway Steam Plant. The City planned to continue operation of Boiler #3 as a stand-alone unit for approximately 5 more years. Before the removal of Boiler #1 & #2 began, certain electrical equipment needed to be relocated and re-energized to allow for safe demolition of Boiler #1 & #2 and continuous operation of Boiler #3.

IEC evaluated the electrical system and provided a design to reroute the 2400V power that serves Boiler #3. In addition, other balance of plant equipment common to all three boilers was repowered for Boiler #3 to operate independently. IEC provided detailed design engineering for the Stand-Alone Boiler #3 Electrical Modifications and the Grounding Grid Extension. Deliverables included electrical drawings, construction specifications, major equipment specifications, and an engineer’s cost estimate for the construction scope.

IEC also provided an arc flash study of the existing electrical systems at the Broadway Steam Plant and Glenarm Power Plant. IEC evaluated the electrical system at each plant from point of interconnection with the grid to the 480V motor control centers. A report was provided for each plant which identified areas that do not comply with the arc flash regulations NFPA 70E (Standard for Electrical Safety in the Workplace) and IEEE 1584 (Guide for Performing Arc-Flash Hazard Calculations). The report also provided arc flash labeling requirements required by NFPA 70E.