AI-generated summary
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Nova Scotia Power filed its 2009 Annual Electromechanical Relay Test Program report and requested Board approval to extend the testing cycle from three years to ten years.
AI summary
- NSPI's 2009 relay testing report, filed June 3, 2010, fulfills a Board directive from May 2006 requiring annual reporting on the 69 kV and 138 kV electromechanical System Reliability relay test program.
- In 2009, 325 relays were tested across 22 substations; 74% required no action, while 10 relays (9%) needed replacement or repair due to serious functional failures and 53 (15%) required recalibration.
- Over the full 2007–2009 three-year cycle, 1,408 relays were tested across 63 substations, with only 34 relays (2%) requiring replacement or repair due to functional failure; total program cost was approximately $440,000, with 2009 costs alone at $92,210.
- NSPI is requesting Regulatory Approval Processes Board approval to extend the relay testing cycle from three years to ten years, citing low failure rates and expected further reductions in required repairs following recent maintenance — excluding Bulk Power System Elements under NPCC Criteria Document A-10, which would retain a four-year cycle.
Disclaimer: This summary was generated by AI from the filings it describes. We take care to make it accurate, but errors are possible - and it isn't advice. Only the filings themselves are the record: if you're relying on something here, confirm it against the source documents or the Nova Scotia Energy Board's own record. Full disclaimer →
What was filed
Documents filed on this day
- N-1 NSPI's Relay Testing Report 2009 6/3/2010