Power System Protection Solutions at IEEE PES T&D Expo

Explore the S-PRO sub-harmonic protection relay and F-PRO feeder protection relay, offering comprehensive protection features for various power system applications in a compact, OEM-ready design.
March 26, 2026

Visit the ERLPhase Power Technologies booth at the IEEE PES T&D Exposition to learn more about our protection relays and disturbance fault recorders that deliver high quality and reliable protection and monitoring of electrical power systems. The S-PRO sub-harmonic protection relay protects various power system equipment from uncontrollable sub-synchronous oscillation conditions. The F-PRO Feeder Protection Relay is designed for medium-voltage feeder protection applications within metal-clad and metal-enclosed switchgear assemblies — it provides phase and ground overcurrent protection, directional elements, breaker failure protection, and comprehensive metering in a compact, panel-ready form factor suitable for OEM integration. TESLA 4000 is an easy-to-use and cost effective, state-of-the-art, multi-time frame (simultaneous) digital fault recorder. Its integrated Phasor Measurement Unit (PMU) functionality streams synchrophasor data for wide area monitoring. Enabled with IEC 61850 protocol, TESLA has advanced communication capabilities that, together with its powerful recording features, provide the most versatile and complete monitoring of power system health. We look forward to speaking with you about your application and future plans.

ERLPhase Power Technologies
Booth 2669