Schweitzer Engineering Laboratory
Pullman, WA 99163
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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,Ã- 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 andÃ- current input of 0.5–128 A,...
Read More »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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Overcurrent/Reclosing Relay suits industrial applications.
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...
Read More »
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.
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.
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...
Read More »
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...
Read More »
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...
Read More »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...
Read More »
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,...
Read More »
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,Ã- 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 andÃ- current input of 0.5–128 A,...
Read More »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...
Read More »
Overcurrent/Reclosing Relay suits industrial applications.
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...
Read More »
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...
Read More »
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...
Read More »
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...
Read More »
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...
Read More »
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...
Read More »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...
Read More »
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,...
Read More »