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How the SEL-21 Relay Revolutionized Electric Power

The SEL-21 was the first commercially available microprocessor-based protective relay. Invented by Dr. Edmund O. Schweitzer, III, this device has been foundational to major advancements in our modern power systems.

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SDG&E and SEL Partner to Mitigate Wildfire Risk in Southern California

SDG&E and SEL Partner to Mitigate Wildfire Risk in Southern California

Robust Reliability for the Water and Wastewater Industry

Robust Reliability for the Water and Wastewater Industry

SEL-651R—A Better Way to Connect DERs

SEL-651R—A Better Way to Connect DERs

Belgium Integrates Offshore Wind Power Into European Grid

Belgium Integrates Offshore Wind Power Into European Grid

Microgrid Solution Plays Big on Campus

Microgrid Solution Plays Big on Campus

Introducing the SEL-2411P Pump Automation Controller

Introducing the SEL-2411P Pump Automation Controller

How to Set the SEL-3061 for Secure Communications Over Cellular Networks

How to Set the SEL-3061 for Secure Communications Over Cellular Networks

Caribbean Utility Thwarts Island-Wide Power Blackouts

Caribbean Utility Thwarts Island-Wide Power Blackouts

SEL and Dragos Partner to Detect and Respond to Industry Cyber Threats

SEL and Dragos Partner to Detect and Respond to Industry Cyber Threats

Speed. Security. Simplicity. SEL-T400L

Speed. Security. Simplicity. SEL-T400L

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