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Automation and Integration

SEL information processors enable you to design and implement both simple and complex intelligent electronic device (IED) integration solutions. Supported peer-to-peer technologies include SEL’s patented Mirrored Bits® communications and IEC 61850.

Reduce Arc-Flash Hazards

SEL arc-flash detection technology significantly decreases the time it takes a relay to trip in response to an arc fault, which reduces hazardous arc‑flash incident energy. SEL combines light-sensing technology with fast overcurrent protection to provide high-speed arc-flash detection (AFD).

Arc Sense Technology

Arc Sense technology (AST) from SEL is an innovative solution that detects high-impedance faults (HIF) on a distribution system. A high-impedance fault occurs when a conductor contacts a ground surface but does not produce a large fault current. SEL’s patented AST detects and clears faults that might not be detected by conventional overcurrent elements. AST algorithms provide improved fault detection over traditional methods as well as enhanced security when compared to existing technologies.

Automation Controller

SEL Programmable Automation Controllers (PACs) are built for utility and industrial applications. They provide rugged and reliable I/O solutions at an economical price. SEL PACs are hardened to meet stringent IEEE and IEC tests for harsh environments, and all are backed by SEL’s no-questions-asked, worldwide, ten-year product warranty.

SEL-2240 Axion

The SEL Axion® is a fully integrated, modular input/output (I/O) and control solution ideally suited for utility and industrial applications. It combines the communications, built-in security, and IEC 61131 logic engine of the SEL Real-Time Automation Controller (RTAC) family with a durable suite of I/O modules that provide high-speed, deterministic control performance over an EtherCAT® network.

SEL-2411 Programmable Automation Controller

The SEL-2411 is a programmable automation controller (PAC) that can be easily customized to fit your needs. Designed to withstand harsh physical and electrical environments, the SEL-2411 is built and tested to meet mission-critical IEEE and IEC protective relay standards.

SEL-3555 Real-Time Automation Controller (RTAC)

The fastest and most powerful Real-Time Automation Controller (RTAC) for advanced data concentration and control.
  • 55 times faster than other RTACs, providing powerful computing for large-scale automation projects.
  • Increases cybersecurity by using exe-GUARD™ whitelist antivirus technology to allow only authorized applications to run.
  • 1 ms deterministic processing intervals for time-sensitive protection and automation control.
  • Eliminates the need for a PC in the substation due to an integrated video port and easy-to-use HMI.

SEL-3505/SEL-3505-3 Real-Time Automation Controllers (RTACs)

Suitable for use in utilities and industrial environments, the SEL-3505/3505-3 Real-Time Automation Controllers (RTACs) are a lower voltage version of the SEL-3530 RTAC. The SEL-3505/3505-3 RTACs are compact and deliver all the standard features of an RTAC, making them excellent options for protocol conversion and secure communication when space is limited.

Transmission Protection

SEL revolutionized the protection industry by building the first microprocessor-based protective relays. These relays integrated, economized, and simplified the art of transmission line protection while introducing two powerful tools: fault locating and event reporting.

SEL-411L Advanced Line Differential Protection

Apply the SEL-411L Relay for complete protection and control of any transmission line. The SEL-411L provides differential protection with both phase- and sequence-based operating elements for sensitivity and high-speed operation.