NOTICE DATE: March 23,
2009
NOTICE TYPE:
M-A112008-04 Operations
SHORT DESCRIPTION: Revised
Sandow Switch SPS Proposal
INTENDED AUDIENCE:
ERCOT Market Participants
DAY AFFECTED: March 23,
2009
LONG DESCRIPTION: The
ERCOT ISO provisionally approved the Sandow Switch Special Protection System
(SPS) proposed by Oncor Electric Delivery on January 8, 2009. 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 completed its review of the Sandow
Switch SPS, and is removing the provisional approval, officially approving this
SPS at this time. 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].
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.
kd