Schweitzer Engineering Laboratory

High-Speed Relay leverages 87L-over-Ethernet feature.

SEL-411L supports data exchange over Ethernet network to provide line current differential (87L) protection for transmission lines with up to 4 terminals. High-speed transmission line differential, distance, and current protection relay provides 1- and 3-pole tripping and reclosing with synchronism check, circuit breaker monitoring, breaker failure protection, and series-compensated line...

High-Speed Relay leverages 87L-over-Ethernet feature.

SEL-411L supports data exchange over Ethernet network to provide line current differential (87L) protection for transmission lines with up to 4 terminals. High-speed transmission line differential, distance, and current protection relay provides 1- and 3-pole tripping and reclosing with synchronism check, circuit breaker monitoring, breaker failure protection, and series-compensated line...

Phasor Measurement Unit enhances applicability via modularity.

SEL-2240 Axion-®, available with Phasor measurement unit (PMU), enables creation of customized solution for specific synchrophasor application. SEL-2245-4 AC Analog Input Module measures frequency as well as voltage and current phasors for PMU applications, while SEL-2244-2 Digital Input Module communicates breaker and switch status using digital status bits in synchrophasor messages....

Phasor Measurement Unit enhances applicability via modularity.

SEL-2240 AxionÂ-®, available with Phasor measurement unit (PMU), enables creation of customized solution for specific synchrophasor application. SEL-2245-4 AC Analog Input Module measures frequency as well as voltage and current phasors for PMU applications, while SEL-2244-2 Digital Input Module communicates breaker and switch status using digital status bits in synchrophasor messages....

Security Gateway integrates physical security capabilities.

In addition to promoting cybersecurity threat awareness, SEL-3622 offers security capabilities that enhance visibility and response time regarding physical tampering with field recloser and voltage regulator control cabinets. Detection capabilities cover sudden movement via embedded accelerometer, sudden changes in visible light via embedded light sensor, opening of doors via input sensor, and...

Security Gateway integrates physical security capabilities.

In addition to promoting cybersecurity threat awareness, SEL-3622 offers security capabilities that enhance visibility and response time regarding physical tampering with field recloser and voltage regulator control cabinets. Detection capabilities cover sudden movement via embedded accelerometer, sudden changes in visible light via embedded light sensor, opening of doors via input sensor, and...

Designed for critical infrastructure and harsh environments, Model SEL-2488 receives GNSS time signals and distributes precise time via multiple output protocols, including IRIG-B and NTP. Device provides time delay compensation for antenna cables and output cables on per-port basis to further optimize time distribution accuracy. For security, clock features Syslog Ethernet standard for event...

Designed for critical infrastructure and harsh environments, Model SEL-2488 receives GNSS time signals and distributes precise time via multiple output protocols, including IRIG-B and NTP. Device provides time delay compensation for antenna cables and output cables on per-port basis to further optimize time distribution accuracy. For security, clock features Syslog Ethernet standard for event...

Motor Management Relay includes arc-flash light sensor.

Using standard motor thermal management, overcurrent protection, and integrated arc-flash detection, Model SEL-849 protects equipment and personnel in low- and medium-voltage motor control centers. Unit features 4 contact outputs,Â- 6 opto-isolated control inputs, EIA-232/EIA-485 port, and Ethernet 10/100 BASE-T port. With 2.8 x 5 x 6 in. form factor and current input of 0.5–128 A,...

Motor Management Relay includes arc-flash light sensor.

Using standard motor thermal management, overcurrent protection, and integrated arc-flash detection, Model SEL-849 protects equipment and personnel in low- and medium-voltage motor control centers. Unit features 4 contact outputs,- 6 opto-isolated control inputs, EIA-232/EIA-485 port, and Ethernet 10/100 BASE-T port. With 2.8 x 5 x 6 in. form factor and current input of 0.5–128 A, relay...