CI Number: C0080228 Title: HYD Hollow Bridge Generator Refurbishment Start Date: 2025/10 In-Service Date: 2026/04 Final Cost Date: 2026/10 Function: Hydro Forecast Amount: $2,587,170
AI summary The document outlines a generator refurbishment project at the HYD Hollow Bridge, with a forecasted cost of $2,587,170. The project is scheduled to start in October 2025 and be completed by October 2026, with an expected in-service date of April 2026.
REDACTED C0080228 Page 3 of 5 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Title: HYD Hollow Bridge Generator Re cution Year: 2025
AI summary The document references a generator project titled 'HYD Hollow Bridge Generator Re' with a recution year of 2025. The text is redacted, and confidential information has been removed.
Document No: XXX-XX-XXXX-XXXX Project Cost Estimate Input Checklist and Maturity Matrix Hydropower Required fields: Estimate Classification Project Name: HYD Hollow Bridge Generator Refurbishment Started or Preliminary Class 5 Class 4 Clas...
AI summary The document outlines a project cost estimate input checklist and maturity matrix for the HYD Hollow Bridge Generator Refurbishment hydropower project. It details the maturity levels of various project definition deliverables, including scope, capacity, location, requirements, technology selection, strategy, and planning.
REDACTED (CONFIDENTIAL INFORMATION REMOVED) REDACTED C0080228 Page 5 of 5 The maturity level is an approximation of the completion status of the deliverable. The completion is indicated by - Not Required (NR): May not be required for all e...
AI summary The text discusses the maturity levels of deliverables in hydropower projects, including definitions for Not Required, Preliminary, and Defined statuses. It outlines key features of hydropower facilities such as reservoir preparation, river management, principal structures, and environmental mitigation. It also notes that some features are unique to hydropower industries and includes typical components of hydropower facilities.
C0080228 Attachment 1 Page 2 of 7 REDACTED (CONFIDENTIAL INFORMATION REMOVED) The information contained in this report is in reference to the work complete at the Hollow bridge generating station which began on September 16, 2025. Prior to...
AI summary This report discusses the inspection and evaluation of the Hollow bridge generating station following the identification of a failure in phase B of the winding. A site visit was conducted by Edward Newhook from NorthPoint Technical Services, and further evaluation was carried out by two technicians to map the winding connection and identify defective coils.
Balancing of the winding: It is important to understand the requirement of maintaining a balanced winding in such circumstances as this. Due to each phase having two parallel circuits it is very important to have the same number of coils i...
AI summary The text discusses the importance of maintaining a balanced winding in electrical systems to prevent circulating currents and potential failure. It describes the inspection and testing process conducted on a machine with failed coils, highlighting the need for equal numbers of coils in each phase and parallel circuit to avoid voltage imbalance.
Executive Summary The Hollow Bridge Generator rotor shows widespread insulation failure and poor winding conditions. Initial and segmented tests confirmed distributed ground wall degradation, una/ected by heating. Pole impedance is within...
AI summary The Hollow Bridge Generator rotor has significant insulation failure and poor winding conditions, with materials indicating it was constructed in the 1940s. Due to its age and damage, full pole rewinding is recommended before it can be returned to service.
Historical Context As part of the scoping activities for the Hollow Bridge Generator refurbishment, the condition of the rotor was assessed on October 22nd. Operations reported a history of mediocre insulation quality associated with Hollo...
AI summary The historical context discusses the assessment of the Hollow Bridge Generator rotor's insulation quality, noting its mediocre condition and lack of prior refurbishment records as part of the scoping activities for its refurbishment.
Winding Condition and Refurbishment History No records of prior rotor refurbishment are available. The winding condition appears poor and likely original. Interturn insulation material is unknown but appears to be a thin felt product which...
AI summary The document discusses the poor condition of windings in a generator, noting that they appear original and constructed with materials from the 1940s. Disassembly for refurbishment is destructive and may lead to repeated damage if not properly managed.
Conclusion The rotor exhibits widespread insulation degradation and poor winding condition, with no documented refurbishment history. These findings and considering the construction of the poles it is my recommendation that the poles be re...
AI summary The rotor shows significant insulation degradation and poor winding condition, with no history of refurbishment. It is recommended that the poles be rewound before returning to service.
7 Annual Production (MWh) Year Hollow Bridge Black River 2016 22,969 79,203 2017 17,725 61,119 2018 30,942 101,974 2019 33,411 114,450 2020 20,922 73,613 2021 25,896 80,898 2022 27,148 80,161 2023 23,987 84,175 2024 25,098 88,250 2025 (YTD...
AI summary The table provides annual electricity production data for Hollow Bridge and Black River from 2016 to 2025 (YTD Nov), showing fluctuations in output. The figures for Hollow Bridge are estimated at 29% of Black River Generation (avg).
Eqp#: 06V1-01-01 - HB1 GENERATOR Task Result Comments 1) TRAVEL Complete 2) TAILBOARD Complete 3) ENSURE UNIT ISOLATION BLR-2023-013 4) TEMPORY SURRENDER UNIT ISOLATION N/A 5) RE-ISSUE WITH CHANGES ALLOWING TESTING PROCEDURE N/A 6) VISUALL...
AI summary This document outlines a checklist for the maintenance and testing of the HB1 generator, including tasks such as travel, unit isolation, visual inspection, and electrical testing. The checklist includes results and comments for each task performed.
Checklist: PM25 Last Inspected By: AQ378 Description: ANNUAL ROTOR AND STATOR INSULATION TESTS Last Inspected: 2024-08-21 WO#: 159043 Building# - Eqp#: 06V1-01-01 - HB1 GENERATOR Task Result Comments 1) TRAVEL Complete 2) TAILBOARD Complet...
AI summary This document is a checklist for annual rotor and stator insulation tests conducted on a generator (HB1) at Building 06V1-01-01 on August 21, 2024. The checklist includes tasks such as unit isolation, visual inspections, and megger readings, with some tasks marked as complete and others pending or not applicable.
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