Schweitzer Engineering Laboratory
Pullman, WA 99163
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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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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.
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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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 »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.
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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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.
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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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...
Read More »