Orono Substation Replacement - Laserfiche WebLink

Home Browse Search

1 ' (MED GRE) substations. The Project includes removal of the 69 kV termination structure and associated foundations. ' On the distribution portion of the Orono Substation project,the proposed replacement consists of: • a 115 kV motor-operated disconnect switch and switch stand for the transformer high side disconnect and a 115 kV, 1200A,40kA circuit switcher; • a 118-14.3 kV, 28 MVA., load tap changing ("LTC") transformer with oil containment, ' high-side, and low-side station class surge arresters; • a single-phase 13.8 kV potential transformer ("PT") (8400-120 volt); ' • one 50 kVA preferred station auxiliary transformer and associated equipment; ' • one 35 kV transformer-low-side box-structure to accommodate switches and conductor; • strain bus to connect the transformer low-side box structure to a second box structure next to existing switchgear in its current location;and • ' • one Electrical Equipment Enclosure ("EEE") with control panels, batter, charger, PLC, terminal cabinets, furniture,heaters,AC &DC cabinets and lighting. The distribution portion of the replacement work also includes all grounding, trenching, controls, telephone and telephone protection, and control cable. Emergency station auxiliary power would be sourced from local distribution. 4.4.2 Transmission Structures 076, 077 and 078(Existing) ' Transmission Structures 076, 077 and 078 will require replacement for the Project to accommodate the new line configuration of transmission Line 0831 and connection to the planned replacement of the Orono Substation (see Figure 4 and Appendix B, Figure B-2). Structure 076 is located within Baker Park Reserve and it will need to be replaced in order to transition the conductors from a horizontal configuration to a vertical configuration at the new double circuit structure (replacement of existing Structure 077) that will provide the in-out connection to the proposed new Orono Substation. For the Proposed Route the existing Structure 077 will be removed and replaced with a new single ' pole galvanized steel or weathering steel structure in a new location located north of its existing location, off residential property and onto HFA land located adjacent to the BNSF railroad (see Figure 2 and Appendix B,Figure B-2).The new structure will be renumbered as Structure 076-1. As indicated above, the existing Structure 077 will be removed. A new single pole galvanized steel or weathering steel structure will be installed northwest of the new Structure 076-1 and be located ' on HFA land adjacent to BNSF railroad right-of-way (see Figure 2 and Appendix B, Figure B-2). This new structure will be numbered Structure 077. Existing Structure 078 is located west of existing Structure 077 on HFA land. Similar to Structure ' 076, Structure 078 will need to be replaced to transition the conductors from a horizontal ' Orono Project June 7,2011 MPUC Docket No. E002/TL-11-223 19