PJM transmission owners must notify the RTO when elements of their operations are reclassified as part of the North American Electric Reliability Corp.’s new Bulk Electric System (BES) definition.

The Federal Energy Regulatory Commission approved NERC’s revised BES definition in Orders 773 and 773-A. (See Bulk Electric Systems (BES) Inclusions and Exclusions.)

Beginning July 1, TOs have two years to inventory their assets to determine which should be included in the BES, PJM told the Operating Committee last week.

Under a PJM compliance bulletin, notification is also necessary when TOs request an exemption from BES status and when they receive a ruling on the request.

The definition focuses on equipment rated 100 kV or higher, although it also includes some equipment rated below 100 kV.