NOTICE DATE: August 3, 2016

NOTICE TYPE: W-A080316-01 Operations

SHORT DESCRIPTION: Proposal to retire Allen Switch Special Protection System

INTENDED AUDIENCE: ERCOT Market Participants

DAY AFFECTED: Comments due August 15, 2016

LONG DESCRIPTION: ERCOT has received a proposal from Oncor Electric Delivery Company (Oncor) to retire the Allen Switch Special Protection System (SPS). The Allen Switch SPS was designed to monitor & relieve thermal violations on the Allen Switch 345/138 kV autotransformer #1, the Allen Switch – Renner Switch 138 kV line, and the Allen Switch – Plano Alma – W. Plano 138 kV line. Oncor has indicated the series reactor will be placed in service normally under supervisory control.

The proposal to retire the Allen Switch SPS is being reviewed by ERCOT. Comments on the proposal are due by August 15, 2016 and should be submitted to [log in to unmask] using the attached comment form. Any questions or concerns submitted by this date will be addressed by ERCOT or Oncor.

ACTION REQUIRED: Any comments on this proposal are due to ERCOT by August 15, 2016, using the attached form.

ADDITIONAL INFORMATION: Information regarding all SPSs can be found in the “Special Protection Systems and Remedial Action Plans” portlet located on the Long-Term Planning page of ERCOT’s Market Information System (MIS). A digital certificate is required to access the MIS.

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 email at [log in to unmask].

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