NOTICE
DATE: November 20, 2008
NOTICE
TYPE: M-A112008-01
Operations
SHORT
DESCRIPTION: ERCOT ISO Implementation of the Sandow
Switch SPS
INTENDED
AUDIENCE: ERCOT Market
Participants
DAY
AFFECTED: November 19, 2008
LONG
DESCRIPTION: Oncor Electric Delivery proposed
installing a 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 granted provisional approval of this SPS, and as of 17:00 on November 19,
2008 this SPS is now in-service.
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].
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