Topic:"Generator Interconnection" in M12596

DESCRIPTION: This project is for the refurbishment of the generator of the Hollow Bridge Hydro Unit, including the rewind of both major components of the electrical generator - rotor and stator. The generator stator was last re-wound in 20...

AI summary The project involves refurbishing the generator at the Hollow Bridge Hydro Unit, including rewinding the rotor and stator. The unit, part of the Black River Hydro System, has been in service since 1940 and is critical for water passage downstream. The generator stator was last re-wound in 2008, and the rotor is original but may have had prior maintenance.

REDACTED C0080228 Page 3 of 5 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Title: HYD Hollow Bridge Generator Re cution Year: 2025

AI summary The document discusses the HYD Hollow Bridge Generator Recution Year: 2025, indicating a planned or proposed action related to a generator at the Hollow Bridge site in 2025. The context is unclear due to redactions, but it appears to be a technical or operational matter.

1 Request IR-1: 2 3 Page 1 of the application notes that Nova Scotia Power Incorporated (NS Power) operates a 4 comprehensive preventative maintenance program which includes inspections, condition 5 assessments, and targeted maintenance to...

AI summary The text discusses a request for information regarding the repair of a generator at Hollow Bridge, including the estimated time to complete the repair, past power production, maintenance history, and maintenance frequency. NS Power is mentioned as the entity responsible for the generator's maintenance.

(c) Operational work was carried out on the Hollow Bridge generator between 2020-2025 at an approximate cost of $20,000. This work included slip ring and brush maintenance, troubleshooting issues with the excitation system and breaker oper...

AI summary Operational maintenance work costing approximately $20,000 was conducted on the Hollow Bridge generator from 2020 to 2025, including inspections, testing, and component adjustments. No issues were identified with the generator during this period.

Checklist: CA-GEN-INSUL-TEST Last Inspected By: AG416 Description: Condition Assessment: Generator Insulation Test Last Inspected: 2023-08-24 WO#: 151302 Building# - Eqp#: 06V1-01-01 - HB1 GENERATOR Task Result Comments 1) SYSTEM BLACK RIV...

AI summary This document is a checklist for a generator insulation test conducted on August 24, 2023, at the Black River Station, Generator Unit 1. It includes details such as temperature, humidity, and insulation resistance measurements, as well as test procedures and conditions.

Generated 2025-12-18 - Checklist JP1052-A - Checklist: JP1052-A Last Inspected By: AQ378 Description: GENERATOR STATOR INSULATION TEST Last Inspected: 2024-08-22 WO#: 159044 Building# -

AI summary This document is a checklist for a generator stator insulation test, last inspected on August 22, 2024, with work order number 159044. It is part of a regulatory inspection process.

Checklist: CA-GEN-INSUL-TEST Last Inspected By: AQ378 Description: Condition Assessment: Generator Insulation Test Last Inspected: 2025-07-15 WO#: 168698 Building# - Eqp#: 06V1-01-01 - HB1 GENERATOR Task Result Comments 1) SYSTEM BEAR RIVE...

AI summary This document outlines the results of a generator insulation test conducted at the Bear River 6V-Hollow Bridge station. The test was performed on July 15, 2025, and highlights the importance of maintaining balanced windings to prevent circulating currents and voltage unbalance, which can lead to equipment failure.

NOVA SCOTIA ENERGY BOARD IN THE MATTER OF: THE PUBLIC UTILITIES ACT - and - IN THE MATTER OF: AN APPLICATION by NOVA SCOTIA POWER INCORPORATED to approve CI C0080228 – HYD Hollow Bridge Generator Refurbishment - $2,587,170 (U&U)

AI summary Nova Scotia Power Inc. has applied to the Nova Scotia Energy Board for approval to refurbish the HYD Hollow Bridge Generator with a cost of $2,587,170 (U&U). The application is under the Public Utilities Act.

M12596 NOVA SCOTIA ENERGY BOARD IN THE MATTER OF: THE PUBLIC UTILITIES ACT - and - IN THE MATTER OF: AN APPLICATION by NOVA SCOTIA POWER INCORPORATED to approve CI C0080228 – HYD Hollow Bridge Generator Refurbishment - $2,587,170 (U&U) INF...

AI summary NS Power is seeking approval to refurbish the Hollow Bridge generator due to an unforeseen stator fault that caused significant damage and forced the unit offline. The generator has been in service for decades and was maintained under a preventative maintenance program, but partial repairs are not feasible due to widespread insulation degradation.

occurred in September 2025, causing significant winding damage and forcing the unit offline. Testing confirmed widespread insulation degradation in both components, making partial repairs impractical. 1. Please provide the estimated time t...

AI summary The Hollow Bridge generator unit suffered significant insulation degradation, leading to winding damage and being taken offline. Testing revealed 11 failed coils and the need for repairs or coil bypassing. The report discusses maintenance requirements, moisture susceptibility, and the impact of voltage unbalance.