NPCC Regional Reliability Reference Directory # 4 …

1 This document, when downloaded or printed, becomes UNCONTROLLED. Users should check the npcc website for the current CONTROLLED version of this document. i npcc Regional Reliability Reference Directory # 4 Bulk Power System Protection Criteria Task Force on System Protection Revision Review Record: December 1st, 2009 September 30th, 2015 Adopted by the Members of the Northeast Power Coordinating Council, Inc. December 01, 2009 based on recommendation by the Reliability Coordinating Committee, in accordance with Section VIII of the npcc Amended and Restated Bylaws dated July 24, 2007 as amended to date. ii Revision History version Date Action Change Tracking (New, Errata or Revisions) 0 12/01/2009 New 1 3/31/2015 Inserted Applicability of npcc Criteria 2 9/30/2015 TFSP Revisions Revisions npcc Reliability Reference Directory # 4 Bulk Power System Protection Criteria This document, when downloaded or printed, becomes UNCONTROLLED.

2 Users should check the npcc website for the current CONTROLLED version of this document. 1 Table of Content Title Page i Revision History ii Table of Content 1 Introduction 2 Terms Defined in This Directory 4 NERC ERO Reliability Standard Requirements 6 npcc Regional Reliability Requirements 6 npcc Full Member More Stringent Requirements 6 General Criteria 6 Criteria for Dependability 7 Criteria for Security 8 Criteria for Dependability and Security 8 Operating Time Criteria 8 Current Transformer Criteria 9 Voltage Transformer and Potential Devices Criteria 9 Batteries and Direct Current (DC)

3 Supply Criteria 10 Station Service ac Supply Criteria 11 Circuit Breaker 11 Teleprotection Criteria 11 Environment 12 Grounding Criteria 13 Transmission Line Protection Criteria 14 Breaker Failure Protection Criteria 14 Design to Facilitate Testing and Maintenance 14 Design to Facilitate Analysis of Protection System Performance 15 Commissioning Testing 15 HVdc System Protection Criteria 15 Criteria for Protection Systems Utilizing IEC 61850 Protocol 15 Compliance Requirements 16 Compliance Monitoring Process 17 Appendix A: Guideline for Bulk Power System Protection Appendix B: Procedure for Reporting to TFSP New and Modified Protection Systems npcc Reliability Reference Directory # 4 Bulk Power System Protection Criteria 2 Introduction Title Bulk Power System Protection Criteria Directory Number 4 Objective The purpose of this Directory is to provide the protection criteria for protection of the Bulk Power System in npcc Inc.

4 Member Areas. It is not a design specification. Effective Date December 1st, 2009. Compliance Guidance Statement- Protection system designs submitted to the TFSP prior to September 30th, 2015 are not subject to the submittal requirements described in Section 6, Compliance Requirements R1, R2, and R3. Background This Directory establishes the basic protection system design criteria and review process for protection systems for the Bulk Power System. Guidance for consideration in the implementation of these criteria is provided in Appendix A, and the procedure for reviewing new and modified protection systems is provided in Appendix B. Applicability The requirements of an npcc Directory apply only to those facilities defined as npcc bulk power system elements as identified through the performance based methodology of npcc Document A-10, Classification of Bulk Power System Elements, the list of which is maintained by the npcc Task Force on System Studies and approved by the npcc Reliability Coordinating Committee.

5 Requirements to abide by an npcc Directory may also reside in external tariff requirements, bilateral contracts and other agreements between facility owners and/or operators and their assigned Reliability Coordinator, Planning Coordinator, Transmission Operator, Balancing Authority and/or Transmission Owner as applicable and may be enforceable through those external tariff requirements, bilateral contracts and other agreements. npcc will not enforce compliance to the npcc Directory requirements in this document on any entity that is not an npcc Full Member. npcc Reliability Reference Directory # 4 Bulk Power System Protection Criteria This document, when downloaded or printed, becomes UNCONTROLLED.

6 Users should check the npcc website for the current CONTROLLED version of this document. 3 Functional Entities Transmission Owners Generator Owners Distribution Providers Facilities New Facilities These criteria shall apply to all new Bulk Power System (BPS) facilities. Existing Facilities It is the responsibility of individual companies to assess the protection systems at existing facilities and to make modifications which are required to meet the intent of these criteria as follows. Facilities found lacking two batteries or elements lacking two independent sets of protective relays If an entity becomes aware of an existing facility that lacks an independent battery for each protection group, or an element that lacks two independent sets of protective relays, a mitigation plan to meet the requirements of this Directory must be submitted to TFSP within six months.

7 The mitigation plan shall correct these deficiencies within three years. Justification for a longer timeframe must be approved by Planned Renewal or Upgrade to Existing BPS Facilities It is recognized that there may be portions of the bulk power system, which existed prior to each 1 A BPS Risk Mitigation Plan was put in place in 2010 based on a recommendation by the Task Force on System Protection following an extensive survey by npcc member entities of their BPS protection system conformance to Directory No. 4 (Criteria A5 at the time). The purpose of this plan was to provide direction to separately mitigate the two attributes identified by TFSP as the highest risk to Reliability namely the lack of two independent sets of protective relays or two batteries.

8 At the time, members who owned protection systems that were subject to these high risk items were directed to provide a schedule to mitigate the identified deficiencies based on their original survey which occurred in 2009. npcc Reliability Reference Directory # 4 Bulk Power System Protection Criteria 4 member's adoption of the Bulk Power System Protection Criteria ( Directory 4 and its predecessor Document A-5) that do not meet these criteria. If protection systems or sub-systems of these facilities are replaced as part of a planned renewal or upgrade to the facility and do not meet all of these criteria, then an assessment shall be conducted for those criteria that are not met.

9 The result of this assessment shall be reported to TFSP. It is recommended this reporting be in accordance with the procedure stipulated in Appendix B of this Directory and using the appropriate portion of the Protection System Review forms , for review and disposition by the TFSP, or in a form consistent with the intent of the procedure. Facility Classification Upgraded to Bulk Power System. These criteria apply to all existing facilities which become classified as bulk power system. A mitigation plan shall be submitted to TFSP for review to bring such a facility into compliance with these criteria. Where the owner of the protection system has determined that the cost and risks involved to implement physical separation, as per Section , cannot be justified, the reason for this determination and an assessment shall be reported to the TFSP.

10 It is recommended this reporting be in accordance with the procedure stipulated in Appendix B of this Directory and using the appropriate portion of the Protection System Review forms , for review and disposition by the TFSP, or in a form consistent with the intent of the procedure. Additions to Bulk Power System Facilities If a bulk power system element is added to an existing bulk power system facility that is recognized under Section , Planned Renewal or Upgrade to Existing Facilities, these criteria apply to the protection systems for the npcc Reliability Reference Directory # 4 Bulk Power System Protection Criteria This document, when downloaded or printed, becomes UNCONTROLLED.