Topic:"Capital Expenditures" in M03715

UARB APPROVAL SHEET Project Title: Kem pt Road Transforme r CI Number: 40425 Capital Project Authorization Head Office Use: T ATO Project Number: Final Cost Date: November 24, 2010 Location: Division: Expenditure Prof file Schedule YEAR Bu...

AI summary The document is an approval sheet for the Kempt Road Transformer project submitted by Nova Scotia Power Inc. to the Nova Scotia Utility and Review Board. The project has a total estimated cost of $1,093,699 and was submitted under section 35.

Parent CI Number Cost Centre 800 - 800-Services - Admin. Budget Version - 2010 10/02 Forecast Forecast Start 10/20/2010 Operational 08/30/2011 Final Cost 08/30/2011 2010 $280,115.30 2011 $813,584.08 Total: $1,093,699.38 Original Cost: $0.0...

AI summary The document outlines a budget forecast for the acquisition of an additional transformer at Kempt Road Substation to serve as an energized spare in case of failure. The forecast includes costs for 2010 and 2011, with a total projected cost of approximately $1,093,699.38.

Original Cost: T647 11/2/2010 201010102 Forecast Variance 1,457 10,200 34,325 15,539 2,220 2,698 785 671 0 336 0 1,342 0 16,779 7,381 5,752 1,610 920,126 11,500 805 46,000 3,237 0 0 0 10,401 0 0 0 0 535 1,093,699 Kempt Road Transformer Adm...

AI summary The document presents a detailed cost breakdown for the Kempt Road Transformer project, including various line items and activities such as design, commissioning, and field supervision. It includes original cost forecasts and variance data from 2010.

Parent CI Number Cost Centre 800 800-Services - Admin. Kempt Road Transformer Project Number T647 Approved Date 11/2/2010 Capital Item Justification Justification Criteria: Transmission Plant Sub-Criteria: Equipment Replacement Name of Rep...

AI summary The document outlines a capital item justification for the Kempt Road Transformer Project, under Cost Centre 800, approved on November 2, 2010, with the justification criteria focusing on transmission plant equipment replacement.

Why do this project? Currently there are three 138-25 kV transformers at Kempt Road Substation that supply area load. Since 2001 there have been four transformer failures at Kempt Road. Most recently there have been two transformer failure...

AI summary Three 138-25 kV transformers at Kempt Road Substation have experienced multiple failures since 2001, with two recent units removed for rewinding. The remaining transformer is at risk of failure due to high fault levels in the area, prompting a proposal to purchase a spare transformer to prevent extended power outages.

Why do this project this way? Purchasing a spare transformer will increase the capacity of the Kempt Road Substation along with providing an energized and tested spare unit in the event of a transformer failure. The remaining unit has been...

AI summary The project involves purchasing a spare transformer for the Kempt Road Substation to increase capacity and mitigate risks from potential transformer failure. The existing unit faces similar conditions, increasing its failure risk. NSPI will execute this work.

The following is a breakdown of costs associated with the Kempt Road Transfonner • Administrative Overheads and Interest $67,224 • Labour $29,120 • Materials $936,905 • Contracts $11,500 • Other $48,950 • Total $1,093,699 The major costs a...

AI summary The document provides a breakdown of costs associated with the Kempt Road Transfonner project, including administrative overheads, labour, materials, and contracts. The major costs are labour and materials, with materials primarily consisting of the Transfonner, Transfonner Oil Filtering, Surge Arrestors, and Misc. Connectors.

NON-CONFIDENTIAL 1 Request IR-2: 2 3 The work order application, submitted to the Board on November 24, 2010, identifies an 4 estimated start date of 2010-10 and an estimated in-service date of 2011-08. Please provide 5 the work schedule f...

AI summary The document discusses a request for the work schedule of the Kempt Road transformer, with NSPI providing a timeline from January 2011 to October 2011. The application was submitted in November 2010, with an estimated start in October 2010 and in-service by August 2011.

NON-CONFIDENTIAL 1 Request IR-14: 2 3 Please discuss the other alternatives and provide a justification that an immediate purchase 4 of a new transformer is the lowest cost option. 5 6 Response IR-14: 7 8 As provided in the response to IR-...

AI summary NSPI justifies immediate purchase of a spare transformer over constructing underground feeders, citing higher costs for duct banks and feeders. Congestion in Halifax Peninsula and 2010 ACE Plan cost data support the transformer option as lower-cost.

NON-CONFIDENTIAL 1 Request IR-18: 5 be very sudden, usually during a through fault. 6 7 (b) 104H-T62 is a sister unit to 104H-T63 and 101H-T61. These units are similar in design 8 and have the same mechanical bracing of the coil assemblies...

AI summary The document discusses the potential mechanical issues with the 104H-T62 transformer unit, which shares a similar design with other units and may have experienced prior mechanical movement. It outlines the need for inspection and repair at an external facility, estimating costs for rewinding and purchasing a new transformer. It also asks about the remaining life expectancy of transformers after rewinding and refurbishment.

CI # 40425 Kempt Road Transformer $1,093,699 Board staff issued Information Requests ("IRs") on December 24, 2010 and February 21, 2011, to which responses were received by the Board on January 27 and March 29, 2011, respectively. The Boar...

AI summary The Board approved NSPI's request for funding to purchase a fourth transformer for the Kempt Road Substation to improve power supply reliability in downtown Halifax. The Board expressed concerns about insufficient project details and the outdated status of the spare transformer report, but accepted the request due to urgency and alignment with Hydro One guidelines.

IR-20: With reference to the response to IR-7: - a) What is the remaining life expectancy of the two transformers that were or will be rewound and refurbished? - b) It is noted that 104H-T61 was rewound in 2010. Please elaborate on this pr...

AI summary The IR-20 inquiry seeks details on transformer life expectancy, the 2010 rewind of 104H-T61 including Board approval dates, and the history of 104H-T63 rewound in 2001 and 2010, including technical specifications and locations. This relates to NSPI's infrastructure maintenance and capital approvals.

IR-28: Please provide and discuss assumed transformers' failure rates, and probabilistic risk assessments of the reliability of power supply to customers in the downtown Halifax area, for the following transformer configurations at the Kem...

AI summary The document requests probabilistic risk assessments and failure rate analyses for transformer configurations at Kempt Road Substation across six timeframes, including pre-2009, post-2010, and scenarios with spare transformers. It also asks for economic analyses comparing urgent transformer purchase versus delayed purchase, referencing prior IR-5(b) responses.

By E-mail and Courier Ms. Lee Thomson-Lutz Manager, Capital Nova Scotia Power Inc. 14th Floor, Barrington Tower Halifax, NS B3J 2W5 Dear Ms. Thomson-Lutz: NSPI Request for Approval of Unforeseen and Unbudgeted ("U&U") Work Order Greater Th...

AI summary Nova Scotia Power Inc. (NSPI) has submitted a request for approval of an unforeseen and unbudgeted capital work order exceeding $1 million related to the Kempt Road Transformer (P-51 0 I Matter No. M03715). The Board is reviewing this request.

CI # 40425 Kempt Road Transformer $1,093,699 Board staff issued Information Requests ("IRs") on December 24, 2010 and February 21, 2011, to which responses were received by the Board on January 27 and March 29, 2011, respectively. The Boar...

AI summary The Board approved NSPI's request to purchase a fourth transformer for the Kempt Road Substation to improve power supply reliability in downtown Halifax, despite concerns about insufficient project justification and outdated transformer requirement reports. The Board also requested an updated report on spare power transformers.