- Protective Coordination
Burns & McDonnell provided a review of Southern Illinois Power Cooperative’s (SIPC) 161-kV, 138-kV and 69-kV system relay settings as a total project for interface with the neighboring utilities, three distribution cooperatives and two municipals. The review included relays for the transmission lines, transmission substation buses, transmission substation transformers and transmission substation capacitor banks. High side fusing of transformers at the distribution substations was reviewed for proper coordination with upstream relaying. Recommendations for improved coordination were provided with Burns & McDonnell's final report. SIPC continues to use Burns & McDonnell to provide further protective coordination of new facilities as appropriate.