NOTICE DATE:  January 8, 2009
NOTICE TYPE:  M-A112008-03 Operations
SHORT DESCRIPTION:  Revised Sandow Switch SPS Proposal
INTENDED AUDIENCE:  ERCOT Market Participants
DAY AFFECTED:  January 9, 2009

LONG DESCRIPTION:  Oncor Electric Delivery has proposed a revision to the previously approved Special Protection System (SPS) at the Sandow Switch substation.  This SPS involves initiating a safe shut down of Sandow Unit 4 upon detection of the loss of the Sandow Switch 345/138 kV Autotransformer.  It also involves opening the Sandow Switch - Minerva 138 kV Line upon detection of an overload condition on this line.
The ERCOT ISO has provisionally approved this SPS proposal, as the expected in-service date is January 9, 2009.  Further details of the Sandow Switch SPS can be found in the "Special Protection Systems Information" section of the Planning and Operations Information secure website at the link below:
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/>.
sg