OneLine Engineering provided complete electrical engineering and design services for the replacement of eight bulk oil circuit breakers with SF6 circuit breakers in a live switchyard. The scope of work included:
• Complete detailed design of eleven new protection relay panels for the line protection, breaker failure protection and bus protection
• Design of temporary cabling as required during system change over during construction
• Production and/or updating of all related electrical drawings including single line diagrams, AC & DC schematics, trip logic diagrams, equipment layouts, termination schedules, equipment grounding and lighting layouts
• Cable schedules for replacement of all control cabling
• Design of the ground grid extension for new line switch structures
• Construction and commissioning assistance