html{display:none} Distribution Protection | Schweitzer Engineering Laboratories

SEL distribution protection solutions provide complete primary and backup protection from all types of faults. Using these devices helps you avoid expensive equipment damage and failure while maintaining system performance and increasing availability.

Feeder Protection

Feeder protection solutions offer comprehensive overcurrent and arc-flash protection capabilities suitable for all types of utility-, industrial-, and commercial-scale power systems. 

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Transformer Protection

SEL devices protect valuable transformers in power generation systems, including generator step-up transformers.

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Busbar Protection

Protect busbars and switchgear with high-speed differential fault detection, or expand your protection with features such as restricted earth fault, arc-flash, and overcurrent elements.

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Recloser Controls

Recloser controls provide fault location, isolation, and system restoration using protection and communications capabilities.

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Digital Secondary Systems

Time-Domain Link (TiDL) technology and SEL Sampled Values (SV) technology help protect and control substation primary equipment using digital devices in the secondary system that transmit data via fiber-optic cables.

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Arc-Flash Protection

Arc-flash protection relays work with low- and medium-voltage apparatus and easily coordinate with other devices in utility-, industrial-, and commercial-scale facilities.

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Remote I/O

Remote I/O modules transfer data from remote locations over fiber and expand the I/O of SEL relays, automation controllers, and other devices without modification to the control panel face.

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Configuration and Visualization Software

SEL software helps you optimize the configuration of your device and visualize power system events.

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Panels and Enclosures

Pre-engineered or custom panels and enclosures help keep costs low and increase system reliability when used for retrofit upgrades and new equipment installations.

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Installation Support

Complete your project with power supplies, switches, panel-mount hardware, cables, and other accessories.

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