Xxxxxxxxx’s Attachment Facilities. The Large Generating Facility is connected via three 34.5kV collector lines from the turbine fields to the Xxxx substation (“Xxxx Substation”), each line consists of a combination of underground and overhead 34.5 kV circuits. Underground circuits are solid dielectric 34.5 kV power cables direct buried in cable trenches 4 feet deep along newly created turbine access roads. Overhead circuits are jacketed Xxxxxxx type cable of compact design supported from wood structures and mounted on insulated brackets suspended from messenger wire. The overhead circuits are located along established county roads. Fiber optic cables are routed along power with certain physical separation. The Xxxx Substation is an outdoor air insulated low profile design, single bus configuration. The Xxxx Substation will include Developer’s Attachment Facilities, Transmission Owner’s Attachment Facilities, and, ultimately, some System Upgrade Facilities. The Transmission Owner’s Attachment Facilities and System Upgrade Facilities are described in Sections I.B. and II, respectively, of this Appendix A. The Developer’s Attachment Facilities in the Xxxx Substation consist of three 1200A circuit breakers for the collector lines and one 3000A main breaker for connecting the 34.5 kV collector bus to the 34.5/230kV step-up transformer. This breaker is SF6 type, rated 72 kV, 40 kA. The substation circuit breakers, disconnect switches, PTs, CTs, and surge arresters are interconnected together by a combination of strain buses and rigid buses mounted on porcelain insulators, supported on steel structures. The Xxxx Substation 34.5kV system includes circuit breaker current transformers and bus connected voltage transformers for metering and relaying. A 34.5 kV-120/208V station service transformer will supply power for the station service. All equipment, including fences, is grounded to a sub-grade grounding system designed to IEEE 80 requirements. The switchyard area shall be covered with a 6 inch layer of 0.75” crushed stone and will extend for a distance equal to 5 feet beyond the fence line. Grounding Transformer – Each collector line is connected with a grounding transformer at the substation end of the line to prevent line voltage rise between the time when the breaker is tripped and the turbines coast down. The Main Step-up Transformer is an outdoor mineral oil filled, forced air cooled, two winding 34.5/230 kV three phase transformer, rated at 75/92/120 MVA OA/FA/FAA. The transformer shall be c...
Xxxxxxxxx’s Attachment Facilities. Interconnection of the Large Generating Facility is achieved by means of the project substation named 9WU-BNL. The 9WU-BNL substation contains switching equipment to consolidate the field’s four (4) 13.8kV circuits, a 33MVA transformer to step the voltage to 69kV, and the required control and protection. Interconnection between 9WU- BNL and the LIPA 8ER Brookhaven Substation is achieved via a 69kV line which is direct buried and trenched approximately 3000ft. The Developer’s Attachment Facilities for the Large Generating Facility Project described in Appendix C of this Agreement are diagrammed in Figure A-1, of this Appendix A, and include: • Eight (8) 3-phase, 1200A (continuous), 25kA (interrupting), electrically operated, drawout type, vacuum 13.8kV circuit breakers including six (6) in ring bus configurations, one (1) spare, and one (1) at the switchgear output • One (1) 3-phase GOAB, 1200 A, 13.8kV switch
