SEL provides reliable and secure distance protection that can be applied with or without communications and can function as a backup for communications-dependent line current differential protection.
Distance protection solutions include:
An evolution of SEL’s groundbreaking SEL-T400L Time-Domain Line Protection relay with time-domain protection technology, the SEL-T401L includes a complete suite of primary and backup protection functions.
High-speed distance and directional protection plus complete control of a two-breaker bay.
Distance protection, monitoring, and reclosing for transmission lines.
Implement communications-assisted tripping and remedial action schemes (RASs) with SEL networking and control products.
A wide-area networking multiplexer optimized for utility applications. The ICON is configurable for SONET or Ethernet transport. It is also ideal for migrating legacy network technologies to a converged network solution.
Our most powerful automation controller—ideal for automation and integration of protection systems, both large and small.
Ethernet connectivity and secure network management for SCADA, engineering access, and control.
Let us partner with you to create an SEL solution for your system. From engineering studies and system design through commissioning and training, SEL engineers bring inventiveness and a deep understanding of the fundamental principles of electric power systems to every project. No matter how complex or sophisticated the system, we can help you protect, simplify, and control it.
SEL products are designed and manufactured for the world’s most challenging environments, exceeding all industry standards for temperature, shock, and electric stress. An optional conformal coating for circuit boards adds an extra level of protection against contaminants in extreme environments.
Every SEL product comes with a ten-year warranty—the best in the industry. If any product fails under warranty, we’ll repair or replace it for free.
We’re happy to answer all your questions and help develop the best solution for your needs.
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.