NOTICE DATE:  April 13, 2009

NOTICE TYPE:  M-B030509-02 Operations

SHORT DESCRIPTION:  Whitney Transformer SPS Approval

INTENDED AUDIENCE:  ERCOT Market Participants

DAY AFFECTED:  April 15, 2009

LONG DESCRIPTION:  ERCOT received a proposal from Brazos Electric for a new Special Protection System (SPS) for the Whitney transformer.  This SPS is intended to protect against overloading on the Whitney 345/138 kV transformer that may occur with the loss of the Bosque Switch – Elm Mott 345 kV Line and high dispatch of 345 kV generation at the Bosque Switching Station.

Upon completion of its review, ERCOT has granted approval of the Whitney SPS.  Information regarding SPSs can be viewed on the ERCOT 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 e-mail at [log in to unmask].

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sg