Rugged, comprehensive, and reliable protection for your power system Apply SEL-700 series devices for protection throughout your
Quickly integrate bay control status and control for breakers and disconnect switches with full automation and protection in one
The SEL-751 Feeder Protection Relay is ideal for directional overcurrent, fault location, arc-flash detection, and high-impedance fault
The SEL-787 Transformer Protection Relay is a versatile, two-winding current differential relay that protects industrial transformers.
Electrical relays, protective devices used to switch power on or off for parts of a circuit, have been integrated into
Generator and Motor Protection Applications Generator protection Numerous current, voltage, frequency, distance, power, and out-of
Protect and monitor most three- and four-winding transformers and terminals with the versatile SEL-787 Transformer Protection
A device that functions to give a desired amount of time delay before or after any point of operation in a switching sequence or
The SEL-400G offers primary and backup protection for generators of all sizes and types, including hydro, pumped
Protective relays protect, monitor and integrate with your control system SEL protection, automation, and control solutions are hard
The LLX1 is the right choice for testing devices with sensor inputs, such as SEL 700 series protection relays. A wide range of cables
Protect asynchronous (induction) and synchronous motors with one SEL-710-5 Motor Protection Relay. Features include broken
Line Protection Our distance protection and line current differential relays feature advanced protection logic that increases reliability
The SEL-751A Feeder Protection Relay is for industrial and utility feeder protection with flexible I/O options, easy retrofit, and fast
The SEL-751 provides complete protection for radial and looped distribution circuits. It offers arc-flash
SEL-700 Series—Reliable Protection The SEL-700 series protective relays reliably protect and control your power
SEL solutions in distance protection and line current differential protection with fault location have made us North America''s most
SEL focuses on providing comprehensive solutions for power system protection, control, monitoring, automation, and integration for
The SEL-351 Relay has built-in Ethernet and IEEE C37.118 synchrophasors, and is ideal for directional overcurrent applications.
Industry-leading products minimize process interruption, maintain uptime, and protect your equipment and bottom line. The SEL-700
SEL revolutionized the protection industry by building the first microprocessor-based protective relays. These relays integrated,
The SEL-851 provides powerful feeder protection, monitoring, and control for utility and industrial applications in a compact device. It
SEL recommends selecting the SEL-710-5 Motor Protection Relay or the SEL-849 Motor Management Relay in place of the SEL
The Allen-Bradley® 865 is a differential protection relay that is used for various tasks. These tasks include selective differential
Schweitzer Engineering Laboratories (SEL) produces a wide range of relays for protection, automation, and control in power
The SEL-751 Feeder Protection Relay is ideal for directional overcurrent, fault location, arc-flash detection, and high-impedance fault
Le relais de protection de ligne d''alimentation SEL-751 est idéal dans les applications de détection de défaut à haute impédance, de
The teaching text describes complex procedures for parameterization of overcurrent, differential, and distance protection relays from
Protect critical components in your power system with a wide range of SEL protective relays covering applications and use cases
The document is a thesis submitted for a Bachelor''s degree that discusses power system protection using Schweitzer Engineering
In-line transformers Use negative‐sequence overcurrent elements in distance protection relays to protect transmission
The SEL-351S Relay provides wide-area system stability awareness with IEEE C37.118 synchrophasors and simplifies
These relays come equipped with a range of features, including remote monitoring and control, easy power
Protect Multiple Substation Assets Using One Relay Minimize the number of devices required to protect a substation by using a
Apply SEL generator protection products and avoid expensive equipment damage and failure while maintaining system performance
IEEE C37.2 Device Numbers 51 Time-overcurrent relay 50 Instantaneous-overcurrent relay 67 Directional-overcurrent
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