N-2CI C0044172 REFILE - Redacted
11 passages
Why do this project? Damage to the original set of dampers as a result of the higher than anticipated aeolian vibrations means the equipment can no longer provide sufficient protection against ongoing conductor vibrations. A third-party en...
AI summary The project is necessary due to damage caused by higher-than-anticipated aeolian vibrations, which have compromised the dampers and could lead to conductor failure, safety risks, and costly repairs at the Strait of Canso transmission line.
as projects with a primary purpose that is integral to the effective operation of a system. These collective capabilities provide a service that is made up of nodes and vectors into a grid or system." Using this definition, power transmiss...
AI summary The text discusses the definition of power transmission projects as integral to system operation, emphasizing their role as vectors connecting nodes such as substations. It highlights challenges related to routing, land ownership, right-of-way, and cable protection, noting similarities in estimating principles between transmission and distribution projects.
12.0 NEXT STEPS - Share damage repair procedure (as detailed in Section 5.0). - Share updated damper and AFS placement charts. - Procure cold galvanizing spray. - Procure gritted inhibitor grease. - Coordinate vibration and galloping monit...
AI summary The document outlines next steps for repair and installation procedures, including damage repair, procurement of materials, monitoring device installation, and post-repair assessments. It also mentions coordination with various entities and the use of specific technologies for inspection.
REDACTED CI C0044172 Attachment 1 Page 33 of 247 REDACTED (CONFIDENTIAL INFORMATION REMOVED) REDACTED CI C0044172 Attachment 1 Page 34 of 247 Canso Strait 230 kV Crossing Assessment
AI summary The document contains a redacted page from a regulatory proceeding, specifically focusing on the Canso Strait 230 kV Crossing Assessment. The page number and context suggest it is part of a larger technical evaluation related to power infrastructure.
REDACTED CI C0044172 Attachment 1 Page 50 of 247 APPENDIX 1 DOCUMENT LIST H349324-0000-70-012- Plan showing a proposed 345 Drawing of plan and elevation 0003_E_V4.pdf kV overhead wire crossing of of the crossing span and inset the Strait o...
AI summary The text lists various documents related to a 345 kV overhead wire crossing of the Strait of Canso, including plans, drawings, and technical specifications for steel towers. The documents include details on design, manufacturing, and compliance with codes and standards.
Canso Strait 345 kV Crossing: Drone Inspection May 2024
AI summary The text references a drone inspection of the Canso Strait 345 kV Crossing conducted in May 2024, indicating an activity related to infrastructure monitoring or maintenance.
1. Introduction An earlier report gave a detailed description of the Strait of Canso crossing, the technical problems and damage due to vibration and galloping and included suggestions for remedial action [1]. In the intervening year, dama...
AI summary This report details the results of a drone inspection of the 345 kV conductor crossing in the Strait of Canso in May 2024. Minor damage was observed, and recommendations include repair of conductor damage and early installation of vibration and galloping controls on all six phases.
3. Photos of Cape Breton Island back span: May 26 2024 Figure 1 shows a general view of the deadend structure at the north end of the back span on Cape Breton Island. The collection of photos shows many details of the structure and include...
AI summary The document discusses a drone inspection of the back span on Cape Breton Island, focusing on the deadend structure, conductor ends, and Salvi dampers. The inspection highlights the need for a close-up climbing inspection to confirm the security of nuts and bolts, and the presence of impressions on conductor surfaces that may indicate slippage of damper clamps.
4. Photos around the Suspension Structure on Cape Breton Island: May 26 2024 Figure 4 General view looking west along the Canso Strait including the suspension structure on Cape Breton Island. Detail from Photo No. DJI 20240117231058 0029...
AI summary The document includes photos from a drone survey of a 345 kV power line crossing the Canso Strait near a suspension structure on Cape Breton Island. The images show the condition of conductors, insulators, and dampers, including a fractured PLP damper from the previous winter. The inspection highlights the exposure of conductors to wind and ice-related stresses, and the need for proper maintenance.
6. Photos of the Back Span on the Nova Scotia Mainland: May 26 2024 Figure 15 View of the back span looking north towards the suspension structures on the Nova Scotia Mainland. Detail from Photo No. DJI_20240116031218_0001_w.jpg Figure 16...
AI summary The document presents photographs and descriptions of the back span of the Canso Strait 345 kV Crossing on the Nova Scotia Mainland, taken during a drone inspection in May 2024. It highlights the terrain's impact on wind patterns, the absence of damage from vibration, and observations of clamp impressions on conductors, potentially indicating maintenance activities.
A second 345 kV crossing, designated L7005, was built in 2017 to connect hydroelectric power from Labrador to Nova Scotia, necessitating high reliability. Despite being equipped with vibration dampers, this new line also suffered conductor...
AI summary A second 345 kV transmission line, L7005, built in 2017 to connect Labrador to Nova Scotia, faced conductor damage due to wind-induced vibrations. Remedial actions, including the installation of PLP-Helix dampers and air flow spoilers, were delayed until late 2022. AAB Engineering is modeling the effects of these measures on the line's suspension span to ensure reliability.