Posting for a 30-day Pre-Ballot Review and subsequent 10-day Ballot Period of PRC-006-NPCC-2 Automatic Underfrequency Load Shedding Standard

Please find attached, clean and redlined versions of the draft NPCC Regional Standard PRC-006-NPCC-2 Automatic Underfrequency Load Shedding Standard which has been posted for a 30-day pre-ballot review and a subsequent 10-day ballot period through midnight December 22, 2018.

This draft has been developed in accordance with the NPCC Regional Standard Processes Manual (RSPM) and within the scope of an NPCC Regional Standard Authorization Request, which was accepted by the NPCC Regional Standard Committee (RSC). The Standard has been posted for three 45-day industry comment periods. The revisions are also presented as mandated by the NERC Rules of Procedure.

Among the proposed revisions included in the updated draft version of the Standard are:

• Modifications to Figures #1 and #2 in the Standard

• Added a Guidelines and Technical Basis section (NERC may request us to create a separate document for this section and post it with the standard subsequent to approvals)

• Incorporated Criteria attributes from Directory #12 Automatic UFLS Program Requirements which will facilitate the retirement of Directory #12

• Additional clarification of requirement language to facilitate compliance

• Proposed retirements of some of the Requirements that are redundant to the PRC-006-2 continent-wide NERC Standard