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Motiva Power Systems Expansion Project page 2 of 2 In addition to the pole-line installation, ISC upgraded ten transformers that supplied power to a third of Motiva’s operating facilities, replacing and completely rewiring numerous associated feeders and controls. ISC also rewired Motiva’s substations and installed all associated switchgear, relays and controls. The new substations rely on fiber optics to communicate control signals, alarms and trips, and this system was also ISC’s responsibility. A total of five miles of fiber optic cable was installed. As required by Motiva, all construction and testing was completed prior to a plant-wide turnaround in February of 2001, so that all major power distribution cut-overs could take place during the scheduled turnaround, minimizing disruptions in plant operations. After the plant resumed operations, eleven additional substations and switch racks were rewired and cut over, a process that required careful planning and coordination between construction, engineering and plant personnel. An average of 26 ISC associates worked at Motiva’s Convent refinery during the 10-month life of the project. In addition to the pole-line system, they installed more than 15,000 feet of conduit and 45,000 feet of wiring, as well as 2,000 feet of underground duct banks. When the work was complete in April of 2001, ISC had invested a total of 37,000 direct-labor manhours without a lost-time injury or significant safety incident of any kind, completing the job on time and within budget.
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