NOTICE DATE: May 9, 2025

NOTICE TYPE: M-A050925-01 Operations

SHORT DESCRIPTION: Requirement for Disturbance Monitoring Equipment (DME) Installation and Configuration for Large Loads 

INTENDED AUDIENCE: Transmission Service Providers (TSPs)

DAYS AFFECTED: May 9, 2025

LONG DESCRIPTION: Nodal Operating Guides Sections 6.1.2.2 and 6.1.3.2.2 provide for ERCOT to require installation and configuration of DME, including Phasor Measurement Units (PMUs), sequence of events recording equipment, and Digital Fault Recorders (DFRs) for Loads at a single site with aggregate peak Demand of at least 75 MW behind a Service Delivery Point. Pursuant to its authority, ERCOT will begin requiring installation of such DME by sending an email to each TSP with existing Loads meeting the criteria to coordinate proper locations and deadlines to install DME. Additionally, the ERCOT Large Load Integration team will begin coordinating with TSPs on installing DME for Loads in the Large Load Interconnection process .

ACTION REQUIRED: TSPs shall comply with ERCOT’s requirement to install and configure DME in accordance with Nodal Operating Guide Sections 6.1.2.2 and 6.1.3.2.2. No immediate action is needed until a TSP receives written notification from ERCOT via email.

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 ClientServices@ercot.com.

If you are receiving email from a public 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.

dg