OneLine Engineering provided complete electrical engineering and design services for the replacement of a 230-115 kV, 250 MVA transformer and associated protection relay panel. The scope of work included:
• Design of the protection relaying scheme for the replacement transformer, including detailed drawings required for the relay panel wiring
• Design of the replacement control cabling
• Production of all related electrical drawings including single line diagrams, AC & DC schematics, trip logic diagrams, equipment layouts, cable and termination schedules, grounding and lighting layouts
• Design modification to the existing RTU to accommodate the new alarms and circuit breaker controls
• Construction and commissioning assistance