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Today’s LiveWire Spotlight discusses NERC’s trial of PRC-023-2 Attachment B, which deals with the Identification of critical sub-200 kV critical transmission lines. The trial was ordered by FERC as a condition for their acceptance of PRC-023-2, the updated Transmission Relay Loadability standard.

By January 1, 2014, Planning Coordinators must apply the Attachment B criteria to their footprint. The owners of sub-200 kV facilities identified by the PC as critical must conform to PRC-023-2 thirty-nine months later.

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