Schweitzer Engineering Laboratory

Communication Systems & Equipment

Encrypting Transceiver enables remote access to equipment.

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...

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Serial Encrypting Transceiver secures vital communications.
Communication Systems & Equipment

Serial Encrypting Transceiver secures vital communications.

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...

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Computing Platform/Gateway operate in harsh environments.
Communication Systems & Equipment

Computing Platform/Gateway operate in harsh environments.

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...

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Relay protects 3-phase motors from thermal overload.
Electrical Equipment & Systems

Relay protects 3-phase motors from thermal overload.

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...

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Differential Relay eliminates need for settings.
Electrical Equipment & Systems

Differential Relay eliminates need for settings.

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...

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Auto-Dialer delivers text alarms, via voice, by phone.
Communication Systems & Equipment

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

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...

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Test & Measurement

Energy Meter protects against revenue losses.

Model SEL-734 Revenue Metering System monitors and records energy and demand usage, activates backup systems during peak demand, and monitors for potentially damaging conditions before equipment is harmed. Capable of recording single-phase quantities, system can issue alarm if power in one phase drops to zero. Model SEL-734 has 12-channel load profile recording system with interval lengths of 5...

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Substation Control Room provides turnkey solution.
Communication Systems & Equipment

Substation Control Room provides turnkey solution.

Drop-in SEL-7000 Integrated Substation System family offers pre-engineered, pre-assembled integrated systems for protection, control, and management of industrial substations. Product offers complete application solutions coupled with system automation, communication, and intelligence capabilities that enable users to manage power systems. Series includes automatic event report collection,...

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Generator Relay protects against abnormal conditions.
Electrical Equipment & Systems

Generator Relay protects against abnormal conditions.

SEL-547 Distributed Generator Interconnection Relay provides utility-grade protection when using generator in all operating modes including peak shaving, base loading, islanding, and emergency backup. Relay provides most basic generator protection functions recommended by IEEE Standard P1547 including over/under voltage detection for single or 3-phase, over/under frequency detection, synchronism...

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