SEL provides complete power system protection, control, monitoring, automation, and integration for utilities and industries worldwide. SEL products, systems, services, and training make electric power …

SEL introduced the world’s first microprocessor relay in 1984, revolutionizing the power protection industry by offering fault locating and other features for a fraction of the cost of earlier systems. In the …

SEL is an internationally recognized designer and manufacturer of products that protect and control electric power systems worldwide. We are problem solvers, inventors, and doers. At SEL, you can …

Use this page to find software downloads for all SEL configuration, collection, system, and visualization and analysis software.

The SEL-751 Feeder Protection Relay is ideal for directional overcurrent, fault location, arc-flash detection, and high-impedance fault detection applications.

SEL University trains power system engineers, technicians, and managers to meet their immediate and long-term workforce training needs. Our experienced instructors and instructional designers create …

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The SEL-651R offers exceptional protection and communications capabilities for Automatic Network Reconfiguration, single- and three-phase tripping, and other distribution automation needs. The SEL …

The SEL Axion is a fully integrated modular input/output (I/O) and control solution suitable for many utility and industrial applications. It combines the communications, built-in security, and IEC 61131 …

Commonly used phone and email accounts for reaching us at SEL.