Company News

Schweitzer Engineering Laboratory

2350 N.E. Hopkins Ct., Pullman, WA, 99163, US

  • 509-332-1890

Kate Wilhite
Senior Marketing Communications Specialist
Phone: 509-336-7946
Fax: 509-334-8795
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Latest New Product News from
Schweitzer Engineering Laboratories Inc.

Electrical Equipment & Systems

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

March 16, 2015

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 protection logic. Traveling wave fault location option can pinpoint location of fault within tower span. Read More

Test & Measuring Instruments

Phasor Measurement Unit enhances applicability via modularity.

November 24, 2014

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. Solution supports synchrophasor standard IEEE C37.118-2011 for both P and M class measurements. Read More

Safety & Security Equipment, Computer Hardware & Peripherals

Security Gateway integrates physical security capabilities.

October 8, 2014

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 connection/disconnection of Ethernet cables. Awareness data can be sent through various mechanisms. Read More

Timers & Clocks, Services

Satellite-Synchronized Network Clock is accurate to ±40 ns.

September 15, 2014

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 messaging, role-based accounts and LDAP for user authentication, and secure HTTPS web interface. Read More

Electrical Equipment & Systems

Motor Management Relay includes arc-flash light sensor.

February 20, 2013

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 also integrates current transformers, programmable logic, and web interface for configuration and monitoring. Read More

Computer Hardware & Peripherals, Controls & Controllers

RTU/PLC System offers low-voltage power supply option.

April 10, 2012

Available with 24/48 Vdc power supply, SEL-2240 Axion comes with 4-slot or dual 4-slot backplanes that are useful for creating small distributed control systems. Unit supports IEC 61850 GOOSE with up to 120 receive and 48 transmit messages, for flexibility in integrating variety of intelligent electronic devices. ACSELERATOR RTAC® SEL-5033 configuration software is included with everything needed to set up I/O, communications, security, and programmable logic in one package. Read More

Computer Hardware & Peripherals

Ethernet Security Gateway provides password and account management.

September 26, 2011

As firewall and access control solution for substations and industrial environments, SEL-3620 allows user-based access controls to serial intelligent electronic devices (IEDs), Ethernet IEDs, and critical protection devices. Automatic password management supports regular IED password changes on user-configurable schedule or on triggered basis, and generates audit reports that detail password changes and user actions, including every command a user sends to any device. Read More

Computer Hardware & Peripherals, Controls & Controllers

Modular Distributed Control System combines RTUs and PLCs.

September 1, 2011

Featuring configurable design, Axion SEL-2240 combines IEC 61131 logic processor, secure communications, advanced data concentration, local and remote I/O, and protocol conversion between multiple built-in client/server protocols. User can build system with up to 6 units, or nodes, which are connected in network using EtherCAT® protocol. Each node can accommodate 10 modules, including processor module, 1 or 2 power supplies, and user-determined mix of I/O modules suitable for application. Read More

Test & Measuring Instruments, Sensors, Monitors & Transducers, Communication Systems & Equipment, Green & Clean

Power Quality Meter complies with IEC 61000-4-30 standard.

June 1, 2011

Providing IEC and ANSI 0.2 Accuracy Class billing data, Model SEL-735 includes waveform capture, harmonic measurements, and data logging function. Advanced model additionally features high-order harmonics, sample rates, detailed power quality reports, and Ethernet. Integration with energy management software from SEL and others helps users cut energy bills. Read More

Test & Measuring Instruments, Sensors, Monitors & Transducers

Digital Transducer provides smart distribution monitoring.

September 29, 2010

With SEL-734T, system operators can assess state of entire distribution system in real-time, isolate disturbances, and switch on power condition equipment by issuing remote commands. Instantaneous disturbance reporting helps minimize response times and prevent future disturbances. Providing seamless communications integration with optional Ethernet port and DNP3 communications protocol, transducer is available with fully sealed, NEMA-rated enclosure. Read More

Test & Measuring Instruments, Controls & Controllers, Communication Systems & Equipment

Capacitor Bank Control supports smart grid projects.

September 16, 2010

Providing per-phase control and harmonic inhibitor logic, 3-Phase Model SEL-734B helps optimize power quality for smart grid projects. Remote communications and control over DNP3 make advanced volt/VAR control possible. Optional enclosure provides weather-tight protection and space to mount network radios, power supplies, and encrypting transceivers. With optional Ethernet communications, DNP3 protocol, and digital or analog I/O, system can be integrated with new and existing capacitor banks. Read More

Test & Measuring Instruments, Computer Hardware & Peripherals, Communication Systems & Equipment, Optics & Photonics

Optical Communications Switch/Multiplexer suits extreme environments.

June 9, 2010

Able to operate as OC-48 SONET multiplexer and/or GbE switch, SEL ICON (Integrated Communications Optical Network) features precise time distribution accurate to 1 µs over WAN. It also offers real-time latency monitor for each channel and support for SONET, Ethernet, and DS0 interfaces such as C37.94 and EIA 232. Product can be managed from one or several locations and is available in 19 in., shelf-mount package and 8 in. DIN-rail or panel-mount package. Read More

Controls & Controllers, Electrical Equipment & Systems, Communication Systems & Equipment

Distribution Controller helps reduce power outage times.

August 6, 2008

SEL Distribution Automation Control System analyzes and detects permanent fault conditions such as broken jumpers, loss of substation source, and lockout due to miscoordinated protective devices, isolates affected feeder sections, and restores power to unaffected sections to reduce outage times. With ability to automate up to 6 sources and 100 devices, system includes drag-and-drop IEC 61131 function block configuration software on SEL information processor. Read More

Communication Systems & Equipment

Encrypting Transceiver enables remote access to equipment.

January 4, 2006

Supplementing standard wireless communication security protocols, Model SEL-3022 includes NIST-approved 128-bit AES encryption and HMAC SHA-1 message authentication algorithms, allowing users to securely apply wireless communications links between portable computer and remote devices. Software encrypts serial-port data and wirelessly sends it to remote SEL-3022. Transceiver can be used to lock out cyberintruders, provide personnel safety, and protect equipment. Read More

Electrical Equipment & Systems

Overcurrent/Reclosing Relay suits industrial applications.

August 18, 2005

With mixed I/O connections and optional front-panel EIA-232 port, SEL-551C facilitates system integration as well as engineering access for monitoring, changing settings, and downloading fault data. It combines overcurrent protection and multi-shot reclosing to protect lines and equipment using mix of phase, negative-sequence, and ground overcurrent elements. Relay enables integration into industrial protection and control schemes with Modbus RTU protocol. Read More

Safety & Security Equipment, Computer Hardware & Peripherals

Serial Encrypting Transceiver secures vital communications.

June 1, 2005

Protecting communications links between control centers, substations, and generating plants against cyber attacks, SEL-3021 uses encryption and session authentication to lock out unauthorized control. Low-latency design suits systems that require time-critical communication, such as SCADA, metering, and protection. Able to be installed in new or existing communications links, bump-in-the-wire solution meets FIPS 140-2 security requirements. Read More

Computer Hardware & Peripherals

Computing Platform/Gateway operate in harsh environments.

November 15, 2004

Substation Computing Platform, Model SEL-3351, can be configured with protocol conversion, HMI, event report retrieval, sequential events recorder reporting, automatic control, software logic, self-diagnostics, system configuration, and data concentration. Protocol Gateway, Model SEL-3301, converts 5 base protocols to connect older and newer equipment. Both products meet IEEE C37.90 and IEC requirements, have no moving parts, and operate from -40 to +75°C. Read More

Electrical Equipment & Systems

Relay protects 3-phase motors from thermal overload.

October 13, 2004

Model SEL-749M protects against nuisance tripping while enabling release of maximum horsepower. True Temperature-Based Thermal Overload Model tracks heating effects of load and current imbalance while motor is accelerating and running, thereby handling all motor operation scenarios. Adaptive Overcurrent Element technology enables unit to protect against high fault-current conditions when Current Transformer saturation is present. Read More

Electrical Equipment & Systems

Differential Relay eliminates need for settings.

July 7, 2004

Microprocessor-based SEL-387L Line Current Relay suits applications with identical-ratio CTs at both ends of line, with digital communications channel interface between relays. Restraint technology provides secure, high-speed ground fault differential and sensitive phase protection, uncompromised by communication asymmetry, CT saturation, or different in-feeds. Negative- and zero-sequence differential elements detect high-resistance ground faults while remaining secure for external faults. Read More

Safety & Security Equipment, Communication Systems & Equipment

Auto-Dialer delivers text alarms, via voice, by phone.

November 3, 2003

Model SEL-3010 Event Messenger automatically telephones on-call personnel, delivering text alarm messages via voice to convey important data. It can deliver measurements that communicate time and severity of event and help direct remedial actions. Unlike standard auto-dialers that send prerecorded alarm messages, SEL-3010 uses text-to-speech technology. Direct communications of unit provide decentralized backup to SCADA systems. Read More

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Schweitzer Engineering Laboratories Inc.