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69kV transmission line protection relay upgrade included 69kV circuit breaker control, and 69kV stuck breaker protection for an existing 69kV nine breaker ring bus and a 138kV five breaker ring bus substation with 25kV radial feeds.
13kV/4kV transformer replacement, performed the complete physical (electrical) and lighting designs. Scope consisted of replacing the transformer and jumpers to the existing copper busses, replacement of nine (9) cap & pin type insulators for the 4kV bus with station post type, knockout wall replacement, new cable tray system, and installation of new LED lighting fixtures.
12kV outdoor switchgear replacement with a 15kV indoor switchgear enclosed in a masonry block building. The switchgear accommodated an increase in the distribution feeders from 4 to 6. Two (2) new 12kV bays; each consisting of bus structure, a vacuum breaker, hookstick disconnects, station service transformer, PTs, a precast trench system, and riser connections. The new building was constructed on a raised platform to meet the local flood requirements.
Physical, and civil structural design for the installation of a new 69-34.5kV distribution substation. The arrangement consisted of eight (8) 69-34.5kV Transformers, a 69kV ring bus configuration with sixteen (16) 69kV disconnect switches, ten (10) 69kV breakers, eight (8) 34.5kV switchgear line ups, and a control building to house station service panels, battery systems, and all protective relaying components, panels, and communications.