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ARTICLE · 04 FEBRUARY 2015

FERC Approves Protection System Maintenance Reliability Standard

Troutman Pepper Locke LLP
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Autoreclosing relays are devices that automatically restore transmission elements to operational service following an automatic circuit breaker trip on a transmission system.

United StatesEnergy and Natural Resources
Troutman Pepper Locke LLP
Troutman Pepper Locke LLP
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On January 22, 2015, the Commission issued Order No. 803, approving a new version of Reliability Standard PRC-005 ("PRC-005-3") that requires applicable entities (Transmission Owners, Generator Owners, and Distribution Providers) to test and maintain certain autoreclosing relays as part of their protection system maintenance program.  Autoreclosing relays are devices that automatically restore transmission elements to operational service following an automatic circuit breaker trip on a transmission system.  Going forward, the Commission further directed NERC to modify PRC-005 to also require the maintenance and testing of "supervisory relays," which help monitor the actions of an autoreclosing scheme, allowing for autoreclosing under certain desirable conditions, and preventing autoreclosing under other, undesirable conditions.

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