SEL-451 Protection, Automation, and Control System
Reduce Cost, Complexity and Maintenance of Power Systems with the SEL-451 Relay.

The new SEL-451 is a complete stand-alone protection, automation, and control system. The SEL-451 has speed, power, and flexibility to combine complete substation bay control with high-speed breaker protection in one economical system. Use the SEL-451 as an integral part of a full substation protection, control, and monitoring solution. Reduce Maintenance costs by accurately tracking breaker operation. Monitor breaker interruption times and accumulated breaker duty to easily determine the need for proactive maintenance. Integrate information with SCADA or automation systems though a communications processor or directly to the Ethernet port.

*Budgetary U.S. Retail, Quantity 1, Base Price = $4,200
Fully Optioned Price = $9,960
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-751A Feeder Protection Relay
The SEL-751A Feeder Protection Relay is the right solution for industrial and utility feeder protection, with flexible I/O options, easy mounting, and fast settings.

Provides complete feeder protection, with overcurrent, overvoltage, undervoltage, and frequency elements. Easily upgrade protection without cutting or drilling existing cutouts with a small form factor and multiple mounting adapters. Quickly integrate into serial- or Ethernet-based communications with IEC 61850, MIRRORED BITS®, DeviceNet™, and other protocols.

*Budgetary U.S. Retail, Quantity 1, Base Price = $950
Fully Optioned Price = $3,380
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-451-4 Bay Control, Automation, and Protection System
Quickly integrate bay control status and control for breakers and disconnect switches with full automation and protection in one device.

With advanced synchrophasor measurement, the SEL-451-4 provides system stability awareness. Choose between Ethernet and serial communication ports with DNP3 and IEC 61850 protocols.

*Budgetary U.S. Retail, Quantity 1, Base Price = $4,410
Fully Optioned Price = $10,170
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-351 Directional Overcurrent and Reclosing Relay
Choose the SEL-351 Relay for transmission or distribution overcurrent protection with optional load profile recording, MIRRORED BITS^® communications, and power quality monitoring capabilities.

Secure, reliable, complete protection describes the SEL-351 Relay design. In addition to extensive, versatile, and easy-to-apply protection functions, this relay also provides comprehensive control, metering, and monitoring functions.

*Budgetary U.S. Retail, Quantity 1, Base Price = $2,790
Fully Optioned Price = $5,058
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-351S Protection and Breaker Control Relay
Simplify feeder protection and control with the SEL-351S Protection and Breaker Control Relay.

Lower operating costs and increase automation capabilities by replacing older electromechanical relay schemes, control switches, and metering devices in one device. Provides sensitive, secure combination of phase, negative-sequence, residual-ground, and neutral-ground overcurrent elements, including directional control, and programmable US and IEC time-current curves for complete distribution system protection. Large front-panel keyboard with local display panel and programmable operator control interface pushbuttons replaces control switches, indicating lamps, and wiring at the breaker control panel. Available with optional power elements, sensitive directional earth fault elements, voltage sag, swell, and interruption records.
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*Budgetary U.S. Retail, Quantity 1, Base Price = $3,045
Fully Optioned Price = $5,275
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-2431 Voltage Regulator Control

Optimize system voltage with the SEL-2431 Voltage Regulator Control, using directional voltage profiles and detailed tap-change event reports.

The SEL-2431 Voltage Regulator Control is compatible with all 32-step, single-phase voltage regulators manufactured in North America. Use various hinge and wiring kits to easily upgrade existing controls without removing the regulator from service. Quickly integrate the SEL-2431 into existing communications schemes using EIA-232, EIA-485, fiber-optic ST®, or fiber-optic V-pin connectors.

*Budgetary U.S. Retail, Quantity 1, Base Price = $1,095
Fully Optioned Price = $1,620

Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-351R Recloser Control
Use the SEL-351R for simple recloser control upgrades with advanced directional overcurrent and frequency elements, and communications-assisted protection schemes.

The SEL-351R Recloser Control, derived from SEL's premiere distribution relay, the SEL-351 Relay, combines traditional recloser control functions with technologically advanced SEL relaying features such as phase and ground directional elements, multilevel under- and overfrequency trip and control, and high-accuracy metering. Compatibility with standard control cable and mounting dimensions makes retrofitting fast and convenient, and the large operator controls and simple settings make the SEL-351R very user friendly. 

*Budgetary U.S. Retail, Quantity 1, Base Price = $3,440
Fully Optioned Price = $4,490 (Note: No accessories or cables included)
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-651R Advanced Recloser Control
Use the SEL-651R for advanced recloser control applications with automatic network reconfiguration, single-phase tripping, and harmonics metering.

The SEL-651R is an enhanced, high-quality control that provides advanced features to new and retrofit recloser applications. Six voltage inputs provide source- and load-side voltage sensing, ensuring safe and secure alternate source logic. Reduce system and customer impacts due to faults by using the single-phase trip capability. Improve feeder loading by using high-accuracy metering functions and harmonic control. Easily power accessories with 40 W, 12 Vdc auxiliary power supply for applications requiring additional power, such as radios. Enable fast communications-assisted trip logic and communications functions through the SEL-patented MIRRORED BITS^® communications technology that provides bidirectional relay-to-relay digital communications. The SEL-651R is certified to IEEE C37.60 standards and is a plug-compatible replacement for 14-pin reclosers.

*Budgetary U.S. Retail, Quantity 1, Base Price = $5,750
Fully Optioned Price = $7,303 (Note: No accessories or cables included)
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-351A Distribution Protection System
Select the SEL-351A Distribution Protection System for complete, economical distribution feeder protection, automation, monitoring, and control.

Lowered costs and advanced features for integrated protection, monitoring, and control schemes are offered in this wire-alike upgrade for the popular SEL-251 Relay. Provides primary or backup overcurrent protection with directional control on distribution systems with sensitive phase, negative-sequence, residual, and neutral overcurrent elements. Includes under-/overfrequency elements, accurate metering, reclosing control, and an optional local front-panel display.

*Budgetary U.S. Retail, Quantity 1, Base Price = $1,790
Fully Optioned Price = $2,765
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-501 Dual Universal Overcurrent Relay
Simplify protection in two-high switchgear with two independent sets of protection elements in one compact relay.

The SEL-501 Dual Universal Overcurrent Relay is two complete sets of protection; both can be configured as one of five basic relays.

*Budgetary U.S. Retail, Quantity 1, Base Price = $1,000
Fully Optioned Price = $1,407
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-551 Overcurrent/Reclosing Relay
Combine overcurrent protection and multiple-shot reclosing in one compact relay.

The SEL-551 Overcurrent/Reclosing Relay replaces the many relays, control switches, and wiring required in traditional distribution substation protection and control panels. The relay also replaces line recloser control packages at a fraction of the cost.

*Budgetary U.S. Retail, Quantity 1, Base Price = $840
Fully Optioned Price = $982
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-551C Overcurrent/Reclosing Relay
Comprehensive overcurrent protection, multiple-shot reclosing, and new I/O mix with optional front and rear communications in one compact relay.

The SEL-551C Relay provides overcurrent relay users with new flexibility in distribution system protection. The SEL-551C provides six inputs and three outputs, with up to two communications ports, for more control options. The SELOGIC^® control equations have added rising and falling edge triggers and latches for custom logic applications.

*Budgetary U.S. Retail, Quantity 1, Base Price = $840
Fully Optioned Price = $1,024
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL Fault Indicators
Help reduce outage time and provide faster fault location.

Fault indicators are available in several models with multiple options to meet customer requirements. The product line includes models for overhead lines, underground cables, pad-mounted transformers and switchgear, and subsurface vaults.

SEL-2100 Logic Processor
Create solutions with MIRRORED BITS^® communications and protection logic from SEL.

Implement low cost, high speed bus protection, automated bus sectionalizing, breaker failure protection, multiple terminal line protection, or other applications by interconnecting up to 15 devices using resident MIRRORED BITS communications.

*Budgetary U.S. Retail, Quantity 1, Base Price = $2,100
Fully Optioned Price = $2,835
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-9510 Control Switch Module

The SEL-9510 Control Switch Module easily adds independent local control and indication to any installation.

Use the SEL-9510 everywhere independent local control is needed. High-visibility status indicators are viewable from almost any angle and at a distance. Field tested arcsuppression technology provides years of reliable service with less contact wear.

*Budgetary U.S. Retail, Quantity 1, Base Price = $300.
Fully Optioned Price: $365
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

SEL-2505 Remote I/O Module
Directly convert device inputs/outputs to MIRRORED BITS® communications.

Reduce operating time, add self-testing, and simplify wiring for auxiliary inputs and outputs.

*Budgetary U.S. Retail, Quantity 1, Base Price = $525
Fully Optioned Price = $1,575
Contact your SEL sales representative today for a quote on the configuration and quantity needed for your application.

• SEL-251
• SEL-251C
• SEL-267