N-1CI 49595 – HYD Tusket Unit 1 Overhaul - Application - Redacted
4 passages
Why do this project this way? Refurbishment of this unit through the replacement of identified worn components represents the lowest-cost approach for achieving the intended project scope, considering both the current condition of the comp...
AI summary The refurbishment of Tusket Hydro Unit 1 through component replacement represents the lowest-cost solution for achieving project goals, preserving reliability, and enhancing environmental performance. The overhaul includes replacing worn turbine and governor components, using modern materials to reduce environmental risks and maintenance needs, and restoring the unit to modern standards while maximizing asset life and operational performance.
CI 49595 Attachment 1 Page 19 of 28 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Turbine Shaft – The turbine shaft, Line bore coupling bolts recommended. Inspection of shaft required. Generator shaft: Bearing Journals, shaft fits, should be...
AI summary The text discusses the inspection and maintenance requirements for turbine and generator shafts, including the inspection of bearing journals, shaft fits, and the need for coupling bolts to be lined bored and replaced. Repairs and cleaning are required, and specific procedures are outlined for assessment in a maintenance shop.
CI 49595 Attachment 1 Page 23 of 28 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Upper and lower brackets - upper brackets on Tusket units have a bridge style. Brackets need blasting and painting. During disassembly bridge deflection should...
AI summary The text discusses structural and maintenance issues with the Tusket units, including bracket design flaws, the need for blasting and painting, and concerns about the intermediate bearing bracket's poor design and movement during operation. It also mentions oily surfaces and insect infestation.
2. SITE VISIT AND EXISTING CONDITIONS Harbourside completed a site visit on August 7, 2025, to observe the interior of the scroll case at the unit 1 turbine. This site visit record is appended to the end of this memo (Appendix C). Harbours...
AI summary Harbourside conducted a site visit on August 7, 2025, to examine the interior of the scroll case at unit 1 turbine and collected measurements of structural components, including the concrete block and pedestal supporting key turbine parts.
N-2CI C0040106 – HYD Tusket Unit 1 Generator Refurbishment - Application - Redacted
5 passages
DESCRIPTION: This project is for the refurbishment of Tusket Unit 1 generator rotor and stator. The scope includes a complete stator rewind, replacement of rotor pole insulation and associated rotor refurbishment, replacement of deteriorat...
AI summary This document describes a project to refurbish the generator rotor, stator, and exciter at Tusket Unit 1, located at the Tusket Hydro Station. The refurbishment includes rewinding the stator, replacing insulation and electrical components, and testing. The project aims to improve reliability, reduce electrical faults, and extend the unit's operating life. The station has been in service since 1929 with no major refurbishments since 1930.
Technical Deliverables: - Not Required (NR): Deliverable may not be required for all estimates of the specified class, but specific project estimates may require at least preliminary development - Started (5): Work on the deliverable has b...
AI summary This section outlines the classification of technical deliverables for hydropower projects, highlighting the key components and features involved in the development of such facilities, including reservoir preparation, river management, principal structures, and environmental mitigation measures.
FIELD TEST PLAN CUSTOMER: Nova Scotia Power STATION: Tusket Job Number: UNIT #: 1 Machine Type: Vertical Rating 900 KVA Voltage 6600 Work scope Test and Inspect Coil Type Multi Turn Number Slots Side Packing Type Customer PO # Rotor Poles...
AI summary This document outlines a field test plan conducted by Nova Scotia Power at the Tusket station for a 900 KVA vertical machine. The test plan includes various inspection and testing procedures completed on July 3, 2019, by Darrel Cormier.
ROTOR FIELD MEGGER TESTING Test Instrument: Megger Identification Number: E6028 Calibration Date: 2020-05-2 20-05-29 Test Dates: Acceptance Criteria: 5 MΩ or Be tter K,M,G,T Megger Value from 1 minute field of PI chart 0.01 ΜΩ Tested By: D...
AI summary The document details rotor field Megger and high potential (Hipot) testing procedures conducted on electrical equipment. It includes test instruments, calibration dates, acceptance criteria, test results, and the person who conducted the tests. The information is part of a larger attachment labeled as confidential.
CI C0040106 Attachment 1 Page 17 of 18 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Comments And Recommendations 1 Rotor was at 0 Megs By cleaning the rings and the leads to try to get readings up, This will just be a fix. The rotor is orig...
AI summary The text details maintenance and repair recommendations for a rotor, bearings, exciter armature, stator, and neutral leads, indicating the need for refurbishment, replacement, and testing. It also includes a table outlining guidelines for insulation resistance tests based on winding voltage ratings.