Transformer Protection

Schweitzer Engineering Laboratories, Inc. (SEL)

Transformer protection products and systems provide complete primary and backup protection for all types of transformer faults. They are suited for use in utility-, industrial-, and commercial-scale power transformer systems.

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Generation Protection

Schweitzer Engineering Laboratories, Inc.

SEL generator 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.

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Generator Protection

Schweitzer Engineering Laboratories, Inc.

Generator protection products and systems provide complete primary and backup protection for all types of generator faults. They are suited for use in utility-, industrial-, and commercial-scale power generation systems.

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Electrical Balance Of Plant

Schweitzer Engineering Laboratories, Inc.

Protecting a generation facility encompasses more than just protecting a generator. Protecting motors, feeders, and station-service equipment is also critical to maintaining plant uptime. By combining SEL solutions, you can do all of that using reliable, field-proven hardware that is suited for use in utility-, industrial-, and commercial-scale power systems.

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Configuration And Visualization Software

Schweitzer Engineering Laboratories, Inc.

SEL software helps you optimize the configuration and management of your device and system settings. You can also use it to display and analyze relay event data, element operation, and more.

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Busbar Protection

Schweitzer Engineering Laboratories, Inc.

Bus protection products and systems provide complete primary and backup protection for all types of bus and switchgear arrangements. They are suited for use in utility-, industrial-, and commercial-scale power systems.

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Installation Support

Schweitzer Engineering Laboratories, Inc.

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

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Panels And Enclosures

Schweitzer Engineering Laboratories, Inc.

SEL panels and enclosures offer advanced protection, control, automation, and communications solutions, all at varying levels of customization. Select from ship-from-stock or configure-to-order panels for expedited lead times, or partner with Engineering Services to develop your own custom panel or enclosure.

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Remote I/O

Schweitzer Engineering Laboratories, Inc.

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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Field Ground Module

SEL-2664 - Schweitzer Engineering Laboratories, Inc.

Add the SEL-2664 Field Ground Module to the SEL-300G or SEL-700G to protect all the critical components in your generator with one comprehensive relay. Or, add the SEL-2664 to the SEL-2664S to complete ground fault protection on both the rotor and stator.

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Generator Relay

SEL-300G - Schweitzer Engineering Laboratories, Inc.

Apply the SEL-300G Relay for comprehensive primary and backup generator protection.

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RTD Module

SEL-2600 - Schweitzer Engineering Laboratories, Inc.

Measure and transmit data from up to 12 RTDs and a single contact status located in transformers, breakers, motors, generators, or other system apparatus.

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Stator Ground Protection Relay

SEL-2664S - Schweitzer Engineering Laboratories, Inc.

Protect high-impedance grounded generators from ground faults at standstill, during startup, and while running with the multisine frequency injection and neutral overvoltage-based protection in the SEL-2664S.

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Current Differential Relay

SEL-587 - Schweitzer Engineering Laboratories, Inc.

The SEL-587 Current Differential/Overcurrent Relay provides protection for any two-input apparatus, such as transformers, motors, generators, and reactors. Apply it for differential and overcurrent protection and use event reports for quick post-event analysis.

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