Regional Standard:
Directory#4 System Protection Criteria
Comment Period (3/25/2019 - 5/9/2019)
04/16/2019National Grid 
Comments: RE: Cost Effectiveness and Resilience Questions: Question #1 Response = Yes, National Grid agrees that the Directory #4 reliability criteria are important to enhancing NPCC's BPS reliability and system resilience. Question #2 Response = No. No cost effective alternatives were identified.
04/16/2019National Grid 
Comments: Section 3: Should PRC-027 Coordination of Protection Systems for Performance During Faults be added to Section 3? Section 4: PRC-006-NPCC-02 should be PRC-006-NPCC-2 (or it could simply reference PRC-006-NPCC to avoid future edits. Section 5: Suggestion to change wording to read as: These Criteria are in addition, more stringent or more specific than NERC continent-wide standards or any NPCC regional reliability standard. Section 5.2.4: Remove extra "." at the end of the section. Section 5.14.1: Suggestion to change wording to read as: Protection system settings shall not constitute a loading limitation as per NERC continent-wide PRC standards. Appendix A, Section Change PRC-006-NPCC-2 Underfrequency Load Shedding Program Requirements to read as PRC-006-NPCC Automatic Underfrequency Load Shedding.