Grid Modernization

Safety Enhancements

Improve public safety and protect your workers and equipment with SEL solutions and technologies.

Detecting and de-energizing downed and broken overhead conductors is a public safety responsibility and a crucial component of wildfire risk mitigation. SEL technologies reduce these risks and hazards in both transmission and distribution systems.

Partner with SEL Engineering Services for turnkey broken-conductor and downed-conductor mitigation solutions with comprehensive consulting, commissioning, and field-testing services.

Falling-Conductor Detection for Distribution Systems

Our innovative falling-conductor solution, developed in partnership with a utility customer, uses synchrophasor data to detect and de-energize broken overhead conductors within one second—less than the time it takes a broken conductor to fall 25 feet (7.62 meters). De-energizing the affected line section while the conductor is still falling eliminates the risk of an arcing ground fault or energized circuits on the ground.

Designed for application in wide-area distribution systems, including single-, two-, and three-phase circuits, the system is easy to modify and expand when additional feeders or phasor measurement units are added.

De-Energize Falling Conductors in Midair

Watch the falling-conductor mitigation solution, step by step.

Downed-Conductor Detection

When an energized distribution line contacts the ground, it can be nearly impossible for conventional ground overcurrent protection to detect the high-impedance faults that often result.

Select models of SEL relays and recloser controls feature the additional security of advanced Arc Sense technology, which can detect electrical arcing and high-impedance faults.

Broken-Conductor Detection for Transmission Systems

The broken-conductor detection function in the SEL-411L Advanced Line Differential Protection, Automation, and Control System detects conductor breaks in transmission or subtransmission overhead lines.

Advanced logic in the SEL-411L allows the relay to identify a broken conductor, trip the line before it hits the ground, adaptively block reclosing onto a permanent fault, and estimate the location of the break.

In addition to broken-conductor detection, SEL relays identify potential cable failures—helping to extend asset life, minimize unexpected downtime, and reduce the likelihood of overhead conductors falling to ground.

Comprehensive Wildfire Mitigation Solutions

SEL works closely with our customers to design and implement turnkey solutions for wildfire risk mitigation. Contact SEL to talk with our professional engineers about how we can meet your needs.

A Partner for Any Modernization Project

SEL offers modernization solutions and services for any part of the grid, scaled to your needs. We design electric power systems, coordinate procurement and construction, manufacture relays, build panels, and install and commission protection and control systems.

Partner with us on individual projects or multiyear modernization programs.

  • Simplicity at Every Stage—Streamline your grid modernization program with a single PO. We offer a single-vendor solution for the entire process—from design and permitting through building, installation, and commissioning. This simplifies budgeting, project management, and timelines, ensuring on-time delivery.
  • Advanced Technology—SEL solutions offer the fastest protection available. They also improve systemwide visibility and control through cybersecure remote engineering access, automated event collection, and precise fault location, among other benefits.
  • Access to Experts and Product Support—Engineering support is available to you before, during, and after a project. After commissioning, you receive 24/7 support from SEL application engineers. Technical support is available for the lifetime of every SEL device at no cost.
  • Reduced Total Cost of Ownership—Our simplified project management approach, advanced technology, and expert support lower your O&M costs in the short term and for the entire life of your modernized system.

Partnership and Support

We believe you should never have to worry about whether your protection and control systems will be working when you need them most. That’s why you always have access to SEL engineers—and every device we manufacture comes with a ten-year warranty and free technical support.

After your modernized systems are commissioned, our worldwide corps of application engineers provides technical support for SEL products at no cost.

As long as your SEL products remain in service, you have free access to direct technical support from a large corps of application engineers who are intimately familiar with the way our devices are deployed and the systems they support in the field.

Customer support staff and application engineers are stationed in regional offices across North America and around the world.

Security Bulletins and Updates

We notify product owners of updates and security patches for the full life of the product. Software and firmware updates are distributed directly to our customers via secure file transfer.

More About Security Notifications

Training and Education

SEL meets your workforce training and continuing-education needs through seminars, conference and tradeshow presentations, and technical training courses.

We can also work with you to develop training that is customized to the specific needs of your workforce.

Partnership and Innovation

San Diego Gas & Electric and SEL partner to mitigate wildfire risk in California.

Questions? Contact Us!

If you have any questions about SEL products, services, solutions, or support, please contact us. Our service and support professionals are ready to provide the answers you need.

Unbeatable Support

SEL support teams are stationed in regional offices around the world and staffed with application engineers who are experts in our products and in power system applications.

Technical support for SEL-manufactured devices is always free. No matter how often you need to call or how long your SEL products have been in service, you’ll reach an SEL expert who can provide the service and support you need.

Our cybersecurity team is always ready with the information and resources needed to keep your OT networks and critical systems secure and working effectively. Cyber services support contracts can include incident response, audits, system hardening, and more, depending on your anticipated needs.

More about SEL warranty and support