UPDATE TO April 7th POST: Understanding Compliance and Testing Requirements for Asset Owners

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Since posting the original blog back on April 7, 2011 there has been some additional activity concerning North American Electric Reliability Corporation, NERC, Protection and Control Standard PRC-005.  The Protection System Maintenance Drafting Standard Team has completed a “Draft 4” version of the NERC Reliability Standard PRC-005-2.  You can download a copy of Draft 4 at …


The proposed PRC-005-2 – Protection System Maintenance standard addresses Federal Energy Regulatory Commission, FERC, directives from FERC Order 693, as well as issues identified by stakeholders. In accordance with the FERC directives, this draft standard establishes requirements for a time-based maintenance program, where all relevant devices are maintained according to prescribed maximum intervals. It further establishes requirements for a condition-based maintenance program, where the hands-on maintenance intervals are adjusted to reflect the known and reported condition of the relevant devices. For a performance-based maintenance program, it ascertains where the hands-on maintenance intervals are adjusted to reflect the historical performance of the relevant devices.