Topic:"Infrastructure Planning" in M03232

2009 Test Results Summary In 2009 there were 325 relays tested in 22 substations across the province, The results are summarized into the following categories: - Replacement or Repair due to serious functional failmes 10 (9%) - Recalibrati...

AI summary In 2009, 325 relays were tested across 22 Nova Scotia substations. Results showed 74% required no action, 15% needed recalibration, 9% required replacement/repair, and 1% physical maintenance. Highlights infrastructure reliability and maintenance priorities.

During the past three years a minimal number of relays tested required replacement or repair due to functional failure (34, 2%). Should any of these relays have failed, backup relays would have responded to prevent customer outages. The to...

AI summary NSPI reports that only 2% of tested relays required replacement or repair over the past three years, suggesting a ten-year testing cycle may be more appropriate. They request UARB approval for this change, excluding Bulk Power System Elements which must be tested every four years.

NON-CONFIDENTIAL 1 Request IR-1: 2 3 Nova Scotia Power's 2006-2007 Relay Testing Report (letter dated July 2, 2008), indicated 4 1712 relays were included in the transmission test program. The 2008 Relay Testing 5 Report (letter dated Apri...

AI summary This document outlines Nova Scotia Power's relay testing program from 2006 to 2009, including the number of relays tested and changes in the program over time. It also responds to questions regarding customer-owned relays and the total number of relays in the system.

NSPI's Relay Testing Report 2009 - P-401.32/ Matter No.: M03232 The Board has reviewed Nova Scotia Power Inc.'s ("NSPI") Relay Testing Report for 2009 received by the Board on June 3, 2010. Board staff requested additional information with...

AI summary The Board reviewed NSPI's 2009 relay testing report, noting a 2% failure rate and approving a 6-year testing cycle for 69 kV/138 kV systems instead of NSPI's requested 10-year cycle. NSPI argued that extended cycles were cost-effective due to low failure rates, but the Board emphasized continued monitoring.