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:
• Design for the integration of the 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 new station services including batteries and charger, new SSVT and PUC back-up supply
• Construction and commissioning assistance