Topic:"Distribution" in M03715

NON-CONFIDENTIAL 1 Response IR-14: (cont'd) 2 3 $1,000,000 would be also be required to terminate these circuits at Kempt Road and terminate 4 either one, or both of the other two substations on the Halifax Peninsula. 5 6 Option 2 7 8 NSPI...

AI summary NSPI is evaluating options for addressing power distribution challenges on the Halifax Peninsula. Two options are discussed: terminating existing circuits and building new feeders, both of which involve significant costs. Due to the high costs, further examination of additional transformation capacity is not pursued, and an alternative is recommended.

CONFIDENTIAL (Attachment Only) 1 Response IR-16: (cont'd) 2 3 (c) The new transformer will be installed at the Dartmouth Crossing Substation. The 4 transformer that was moved from the Dartmouth Crossing Substation to Kempt Road will 5 rema...

AI summary The response to IR-16 details the installation and movement of transformers at the Dartmouth Crossing Substation and Kempt Road. The response to IR-17 explains that the full 54 MVA load cannot be transferred due to feeder capacity limitations and provides the maximum capacity of a mobile transformer based on ambient temperature.

NON-CONFIDENTIAL 1 Request IR-22: 2 3 With reference to the response to IR-10: 4 5 (a) NSPI states that the winding configuration of the spare transformer located in 6 Onslow is such that it cannot be paralleled with the existing units wit...

AI summary NSPI explains that the spare transformer in Onslow cannot be used without causing an outage due to a phase shift caused by its wye-wye configuration. It also mentions plans to acquire an additional mobile transformer rated at 50 MVA, expected to be available in 2012 or 2013. NSPI also clarifies that the system spare transformer cannot be used at Kempt Road Substation for an extended period as it is needed for other substations.

CONFIDENTIAL (Attachment Only) 1 Request IR-26: 2 3 With reference to the response to IR-14: 4 5 (a) Please explain why 5 additional circuits are needed to provide sufficient transfer 6 capability for the Kempt Road Substation load. 7 8 (b...

AI summary The document discusses a request for clarification on the need for additional circuits at the Kempt Road Substation and the long-range planning study for the Halifax Peninsula. NSPI explains that 5 additional 25 kV circuits are needed to handle unsupplied load in the event of transformer failure and references a confidential attachment for details on the Armdale substation and future load planning.

NON-CONFIDENTIAL 1 Response IR-28: (cont'd) 2 3 Kempt Road Substation 4 104H-T61 = 0 MVA 5 104H-T62 = 54 MVA 6 104H-T63 = 0 MVA 7 Mobile = 22 MVA 8 9 Armdale Substation 10 2H-T61 = 36 MVA 11 12 Water Street Substation 13 1H-T61 = 51 MVA 14...

AI summary This document discusses NSPI's response to a request regarding the risk and economic analysis of purchasing a transformer at Kempt Road Substation. It highlights the risks associated with transformer failures, the impact on load supply, and the urgency of purchasing the transformer to ensure reliability.