REVISED TECHNICAL BULLETIN 140 Subject

							                      NEW YORK
                     INDEPENDENT REVISED TECHNICAL BULLETIN
                     SYSTEM OPERATOR
                                                                                                                                    140
                                                                                                                            Revised June 16, 2009

Subject: System Protection Maintenance Reporting
The New York Independent System Operator (NYISO), System Protection Advisory Subcommittee
(SPAS) has been assigned to monitor compliance with NPCC Directory D-3 “Maintenance Criteria
for Bulk Power System Protection.” As part of this process, Transmission and Generation Owners
report their ability to comply with the NPCC D-3 requirements on a quarterly basis. This document
describes how this process is carried out by SPAS including functions of the reporting of
Transmission and Generation Owners and of NYISO staff.

Details:
I.        Scope
          The New York Independent System Operator (NYISO), System Protection Advisory
          Subcommittee (SPAS) has been assigned the responsibility of monitoring compliance with
          the relay maintenance criteria set forth in NPCC Directory D-3.

II.       Compliance Reporting
          Prior to January 1 of each year, NYISO staff will send an e-mail to the Transmission and
          Generation owners reminding them their annual compliance statement for January 1 is due
          by January 20. The Transmission and Generation Owners shall respond to the Reliability
          Compliance Mailbox at reliability_compliance@nyiso.com with a statement of full
          compliance or compliance with exceptions as of January 1. Reports shall list the BPS
          elements that exist at each BPS station. Exceptions are individual Bulk Power System
          elements with any system protection component capable of tripping that element that has
          not been maintained in accordance with D-3 as of the end of the 4th quarter. In the case of
          transmission line elements, each terminal shall be reported as a separate item. Along with
          their statement, Transmission & Generation Owners shall provide a revised test date for
          each exception.

III.       Maintenance Reporting
          Prior to April 1, July 1, and October 1 of each year, NYISO staff will send an e-mail to the
          Transmission and Generation Owners reminding them their quarterly maintenance report is
          due on April 20, July 20, and October 20, respectively. The Transmission and Generation
          Owners       shall    respond     to    the    Reliability  Compliance       Mailbox      at
          reliability_compliance@nyiso.com. On these dates, Transmission and Generation Owners
          shall report on maintenance backlog items, which are BPS elements that have not been
          maintained within the applicable time period described in D-3, as of the end of the previous
          quarter. In the case of transmission line elements, each terminal shall be reported as a
          separate item.

IV.       Report Review
          A summary of these reports shall be reviewed at the SPAS meeting immediately following
          the due date. Subsequent to the SPAS meeting, the SPAS Chair shall send a summary
          report to the NYISO Operating Committee Chair.

The purpose of this “Technical Bulletin” is to facilitate participation in the NYISO by communicating various NYISO concepts, techniques, and
processes to Market Participants before they can be formally documented in a NYISO manual. The information contained in this bulletin is subject to
change as a result of a revision to the ISO Tariffs or a subsequent filed tariff with the FERC.

NYISO Customer Support                                                                                                             Page 1 of 2
TB 140 – System Protection Maintenance Reporting

V.      References
        NPCC Regional Reliability Reference Directory #3, “Maintenance Criteria for Bulk Power
        System Protection,” July 11, 2008.




     The NYISO anticipates that this Technical Bulletin will be rolled into a Manual that is
                               currently under development.




NYISO Customer Support                                                                Page 2 of 2