Secure Communications

SEL is a leader in securing communications from attackers, for the serial ports on our own products, and with a "bump-in-the-wire" solution for nearly any serial data communications link, including SCADA and engineering access applications.

Transmission Protection
Transmission products feature comparison chart

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.

Distribution Protection
Distribution products feature comparison chart

Optimized management of distribution feeder performance is critical for the economical delivery of reliable electric power to connected customer loads. Choose from a variety of SEL distribution feeder relays to best meet your application needs.

Transformer, Bus, Breaker, and Capacitor Protection
Transformer, | bus, | breaker, and capacitor relay feature comparison charts

Substation apparatus are valuable assets in power delivery systems. Select the SEL relay model that best suits the system application requirements for protection of transformers, buses, circuit breakers, and shunt capacitor banks.

Generator and Motor Protection
Generator and motor feature comparison chart

Protecting a generator or motor from electrical or mechanical damage is only one of many important functions required for today's rotating machinery. Measuring and reporting system conditions such as off-nominal-frequency operation for generators, or motor starting trends for critical motors can be as important as the protection itself. SEL provides a variety of advanced motor and generator protection systems.

Industrial Power
Controller and I/O Module Features

SEL is excited about bringing the advantages of secure, sensitive, reliable protective relays to the industrial power market with products and services for motor, generator, transformer, and feeder protection, control, and monitoring, plus integrated communications!
Visit SELIndustrial.com

Integration and Automation
Integration and automation feature comparison chart

Easily connect SEL Communications Processors to SEL relays and a variety of other manufacturers’ devices including SCADA or DCS systems. Expand applications using plug-in protocol processor cards for the SEL-2032 and SEL-2030, EIA-232/485 protocol converters, Logic Processors, and Remote I/O Modules. Convert protocols with SEL-3301 Protocol Gateway. Include System Computing Platform in a custom integration/automation solution.

SEL Rugged Computing Products
Computing products feature comparison chart

SEL rugged computing products are designed and tested to the same IEEE and IEC standards that apply to protective relays and substation communications equipment: to withstand vibration, electrical surges, fast transients, and extreme temperatures. With no fans or other moving parts and the SEL worldwide, ten-year product warranty, these products employ the most reliable, robust technology available for demanding applications.

Precise Timing
Clock Features

The role of substation time keeping has grown from basic sequence-of-event and fault recorder time referencing to mission-critical roles such as synchrophasor measurement and detailed event analysis.  These new applications require that precise timing equipment meet the same environmental standards and be as reliable as the protective relays with which they associate.

Fiber-Optic Communications
Fiber-optic communications feature comparison chart

Apply low-cost point-to-point fiber-optic communications hardware using fiber-optic transceivers/modems and optical cables

SEL software solutions provide the tools you need to most efficiently communicate, set, manage, and analyze your SEL relays. Use SEL software solutions to create and edit relay settings, communicate with SEL Communications Processors, develop and analyze protection characteristics for induction motors, and much more.

SEL software applications provide a graphical user interface for setting, managing, and analyzing your SEL protective relays. Download demonstration versions of a variety of these applications. Freeware applications are also available!

Testing

SEL provides equipment, software, and services to help you test and commission products and systems. SEL also provides model power system testing services.

Completing a substation or a control house requires more than relays. SEL provides contact arc suppressors, linear power supplies, displays, UPSs, selector switches, panel-mount hardware, bezels, dust covers, cables, and other accessories essential for a successful power system project.