NERC TPL-001-05 Compliant Solutions

NERC TPL-001-05 requires that Transmission Planners and Planning Coordinators verify that their systems remain reliable during a broad range of system conditions and contingencies. A key part of this is demonstrating that Station DC Supply systems—including battery banks and monitoring equipment—can support protection and control systems by eliminating single points of failure.

However, at the majority of existing substations, since there is no room to add a second DC system for redundancy, the standard allows these systems to be grandfathered in if they follow a couple additional steps. As long as these systems are monitored and alarms are in place to:

1. Identify a problem with the DC voltage or that the battery has become open circuit
2. It will be reported to the network operations center on a 7/24 basis

Why NERC TPL-001-05 Matters

NERC TPL-001-05 outlines planning requirements for the reliability of the Bulk Electric System. In particular, it emphasizes the importance of verifying that the DC supply system can:

• Operate continuously through contingency events
• Provide uninterrupted power to critical protection systems
• Be monitored and tested for readiness and health

Organizations must demonstrate not only the existence of DC systems—but also the ability to detect failures, monitor performance, and ensure continuity during planning assessments.

Stay Ahead of Compliance Requirements

Whether you’re preparing for a NERC audit or proactively improving your critical power systems, Eagle Eye Power Solutions is here to help. With a deep understanding of regulatory standards and a robust portfolio of monitoring and testing tools, we are your partner in achieving NERC TPL-001-05 compliance with confidence.

Eagle Eye Power Solutions BC-2500™ has the unique capability of being able to provide a definitive test of battery continuity and the status of the DC voltage on a daily basis without human intervention.

How Eagle Eye Power Solutions Helps Meet NERC TPL-001-05 Requirements

• Monitoring Battery Continuity
  Our solutions provide real-time monitoring of battery continuity to ensure power remains available to protection systems.
• Detecting Ground Faults & Connection Issues
  Proactively identify faults in your DC system wiring or installation before they become reportable issues.
• Capturing Key Data for Compliance Reports
  Accurate logging and exportable data support engineering and compliance teams in annual planning studies and event simulations.
• Providing Visibility of DC Supply Health
  With continuous insight into battery voltage, current, temperature, and resistance, your team can be confident the system will perform when needed.
• Enabling Predictive Maintenance
  Our solutions detect trends before they become failures—supporting long-term reliability planning.