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    Utilities

    Making Electric Power Safer, More Reliable, and More Economical

    Electric Utilities

    Utilities around the world choose SEL for leading technologies and superior products, services, and solutions. SEL commits to our quality with a worldwide, ten-year, no-questions-asked warranty and unmatched, free technical support and customer service.

    SEL has served utilities since 1984, when we introduced the world’s first digital protective relay to the electric power industry. The first SEL digital relay, the SEL-21, revolutionized the power protection industry by providing fault locating and real fault data at a much lower cost to the customer than traditional electromechanical relays.

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    Today, SEL partners with customers around the world to ensure the safe, reliable, and economical delivery of electric power. SEL leads in the protection, monitoring, and control of electrical transmission and distribution lines, apparatus, and substations. We offer a full line of protective relays, substation automation systems, communications solutions, cybersecurity devices, automation controllers, and networking equipment that work together to provide protection, SCADA, automation, monitoring, and asset management.

    One of SEL’s latest innovations includes time-domain protection technology that delivers a dramatic reduction in transmission relay tripping times. The SEL-T400L Time-Domain Line Protection securely trips in 1 to 4 milliseconds. Faster tripping means more megawatts transmitted, better stability, improved safety, less damage to equipment, and a reduced fire risk.

    Videos

    Alabama Power 'If it's blue, we like it.'

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    Alabama Power 'If it's blue, we like it.'

    AEP Ohio Keeps The Lights On With SEL Automation

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    AEP Ohio Keeps The Lights On With SEL Automation

    Co-op Expands Comms Network

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    Co-op Expands Comms Network

    Protection and Monitoring In Spain

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    Protection and Monitoring In Spain

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    Advanced Power Metering

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    Fault Indicators and Sensors

    SEL is the electric power industry's leader in fault indicator technology, producing the widest variety of fault indicator products

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    Precise Time

    Industry-leading accuracy, time distribution, and dependability

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    Protection Services

    SEL Protection and Automation Services improve power system performance.

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    Synchrophasors

    Synchronized phasors (synchrophasors) provide a real-time measurement of electrical quantities from across the power system.