NOTICE DATE:  June 17, 2010

NOTICE TYPE:  M-A061710-01 Operations

SHORT DESCRIPTION:  New PCAP for Olney – Westover 69 kV single circuit

INTENDED AUDIENCE:  ERCOT Market Participants

DAY AFFECTED:  June 17, 2010

LONG DESCRIPTION:  Due to post contingency voltage collapse for the loss of the Olney to Westover 69 kV line, ERCOT may use a Pre-Contingency Action Plan (PCAP) to avoid the loss of voltage support from Elbert Switch to Seymour. This PCAP will require the closing of the 69 kV breaker (1090) at the Seymour Switching Station which is normally open during real-time operations. Notification of the implementation of this PCAP will be provided in the Daily Grid Operations Report and in the Outage Scheduler.

ADDITIONAL INFORMATION:  Information regarding PCAPs is located in the “Operations Review” section of the Planning and Operations Information secure website: http://planning.ercot.com/login/login.

CONTACT:  If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

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dh