NOTICE DATE:  January 21, 2010
NOTICE TYPE:  M-A121809-02 Operations
SHORT DESCRIPTION:  Proposal to disable the Heights SPS
INTENDED AUDIENCE:  ERCOT Market Participants
DAY AFFECTED:  January 4, 2010
LONG DESCRIPTION:  ERCOT has received a request to permanently disable the Special Protection System (SPS) at the Texas-New Mexico Power Co. (TNMP) Heights substation. This SPS was intended to protect against post-contingency overloading on the Greenbelt - PH Robinson 138 kV line for the loss of the Heights - Freeway Park / PH Robinson 138 kV Double-Circuit. System changes have been completed such that TNMP believes that this SPS can be disabled.
ERCOT has completed its review and has approved the proposal to permanently disable this SPS.
Further details of the Heights SPS can be found in the "Special Protection Systems Information" section of 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]<mailto:[log in to unmask]>.
If you are receiving e-mail from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com<http://lists.ercot.com/>.

dh