Topic:"Asset Management" in M12744

DESCRIPTION: This project involves the construction of an 8.5 kilometer new three-phase feeder from the 92H Tidewater Substation to offload and double circuit the existing feeder 92H-331 along Peggy's Cove Road. The new feeder construction...

AI summary This project entails constructing an 8.5 km three-phase feeder from the 92H Tidewater Substation to relieve and double-circuit the existing 92H-331 feeder along Peggy's Cove Road. It aligns with a separate project (CI C0071888) to replace the 92H-T61 transformer with a 25 MVA unit, addressing winter peak-load overloads at the substation and feeder.

Summary of Related CIs +/- 2 years: Pursuant to Section 11.2 of the CEJC, related CIs for Distribution projects include Work completed on the same asset class (Padmount transformers, Breakers, etc.) or in the same location (feeder, Transmi...

AI summary The document outlines related Cost Items (CIs) for Distribution projects under Section 11.2 of the CEJC, specifying asset classes (e.g., Padmount transformers) and locations. No projects are listed for 2024–2028. Depreciation classes include Distribution Plant components, with an estimated asset life of 40 years.

Retirement Information: - Categorization of Retirement: Accounting Policy 6420 Retirement and Disposal of Capital Assets - Percentage of Asset Pool: 0.06%

AI summary The document references Accounting Policy 6420 for categorizing retirement and disposal of capital assets, noting that the retirement constitutes 0.06% of the asset pool. This indicates a minor proportion of assets are being retired under this policy framework.

5.1.4 Age of Plant The Iowa State Survivor Curves were used to determine the remaining useful life of each of the substation transformers included within this study based on a 42-year expected lifespan of a utility transformer on an R2.5 c...

AI summary The Iowa State Survivor Curves were used to estimate the remaining useful life of substation transformers, based on a 42-year expected lifespan on an R2.5 curve, as part of an analysis of the age of plant.

5.2.4 Age of Plant The Iowa State Survivor Curves were used to determine the remaining useful life of each of the substation transformers included within this study based on a 42-year expected lifespan of a utility transformer on an R2.5 c...

AI summary The Iowa State Survivor Curves were used to estimate the remaining useful life of substation transformers in Hammonds Plains, based on a 42-year expected lifespan on an R2.5 curve.

6.3.1 Alternative A: Hubley Conversion and Transfer to Stillwater Lake The Hubley area has experienced significant load growth, and the feeder 92H-332 has previously been identified as overloaded. To address this, distribution supplied fro...

AI summary Alternative A involves converting Hubley's 12 kV system to 25 kV and transferring it to Stillwater Lake to address load growth and overloading. A new substation at Stillwater Lake will provide a new 25 kV source, and temporary supply from feeder 103H-432 will be used during the transition. The plan includes installing transformers, extending feeders, and rebuilding the Tidewater substation.

capacity during winter peak load; therefore, load transfer through step-down transformers is not possible. As such, existing feeder 92H-331 has limited load transfer capability with adjacent feeders. NS Power stated that extending feeder 9...

AI summary NS Power proposes extending feeder 92H-335 to reduce winter peak load on feeder 92H-331 from 320A to 179A, citing limited load transfer capability. The Planning Study indicates loading will stay within design limits for 10 years. NS Power also claims a transformer overload issue at Tidewater substation will be resolved via a $1M spare unit upgrade.