Seneca Substation 1 & 2 Modifications
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Seneca Substation 1
Seneca Substation 1 was over 40 years old and had experienced a major fire and outage. UTEC, PLLC provided design, engineering and construction services for a new 12.5 kV substation to be constructed with the existing substation in service. The new substation was served by a connection to the existing Duke 12.5 kV bus through a new 12.5 kV main circuit breaker. The substation was built to initially serve 4-12.5 kV distribution feeders with space for four additional feeders. Each feeder bay consists of new 12.5 kV circuit reclosers, with single phase tripping capabilities, and voltage regulators. The substation was designed with a radial configuration with main and transfer buses. The substation included a control building with protective relay panels and substation batteries. UTEC prepared design drawings; completed fault current calculations, rigid bus design calculations, direct stroke lightning protection calculations, and battery sizing calculations; prepared and evaluated major equipment specifications for overhead structures and equipment, 15 kV circuit reclosers, 7.62 kV voltage regulators, and the control building; reviewed shop drawings for all major equipment; prepared and evaluated general construction specifications; provided relay settings, construction services and supervision, commissioning services, and record drawings. Seneca Substation 2 At the same time as the new Substation 1, UTEC, PLLC provided design, engineering, and construction services for modifications to the existing 110-12.5 kV Substation 2. Modifications were made incrementally to allow all feeder exits to remain in service except during a few night time outages. Modifications to the substation include upgrading five existing 12.5 kV feeder circuit breakers with new single phase trip enabled circuit reclosers, refurbishing two existing 12.5 kV feeder breakers to be installed as main breakers on the secondary of transformers T1 & T2, adding an additional feeder bay on the end of the existing feeder bay structure, installing new cable trench and all new control wiring, and a new control building with new SEL relays, batteries, and SCADA system. UTEC prepared design drawings; completed fault current calculations, rigid bus design calculations, direct stroke lightning protection calculations, and battery sizing calculations; prepared and evaluated major equipment specifications for overhead structures and equipment, 15 kV circuit reclosers, 7.62 kV voltage regulators, and the control building; reviewed shop drawings for all major equipment; prepared and evaluated general construction specifications; provided relay settings, construction services and supervision, commissioning services, and record drawings. |
