351#01
Price: $4,334.53 | Savings: $138.00
- Feeder protection
- Wide-area power system event monitoring using IEEE C37.118 synchrophasors
- Horizontal rack mount
SEL-351
Protection System
The SEL-351 Protection System has built-in Ethernet and IEEE C37.118 synchrophasors, and is ideal for directional overcurrent applications. Optional Mirrored Bits communications and power quality monitoring add flexibility to solutions. The SEL-351 is the protection standard for utility and industrial electrical systems around the world.
Starting at
$3,710
Breaker Failure Detection
Detect a failed circuit breaker quickly with built-in high-speed breaker failure detection elements and logic.
Pilot Protection Schemes
Apply pilot protection on transmission, subtransmission, or distribution circuits, including three-terminal lines with traditional pilot communications equipment or with optional Mirrored Bits communications.
Service Restoration
Dispatch line crews to quickly locate faults on overhead lines and restore service faster using the built-in fault locator.
Enhanced Circuit Breaker Monitoring
Schedule circuit breaker maintenance based on need as determined from detailed breaker monitoring data and alarms.
Grounded Power System Protection
Apply sensitive directional overcurrent protection for Petersen Coil grounded, ungrounded, and impedance-grounded power systems.
- Integrate and automate substation equipment, even devices from multiple vendors, with the IEC 61850 communications protocol.
- Protect and control radial or looped transmission, subtransmission, or distribution circuits.
- Use pilot protection on transmission or subtransmission circuits, including three-terminal lines.
- Apply directional and nondirectional overcurrent protection for a transformer/bus-main/bus-tie breaker.
- Protect and control capacitor banks.
- Apply breaker failure protection.
- Control autoreclosing with synchronism and voltage check logic.
- Protect small generators.
- Protect distributed generation interconnections.
- Shed load using underfrequency elements.
- Add fault indicators to distribution protection, and reduce fault-finding time by 50 percent.
- Analyze overcurrent protection system performance using the built-in Sequential Events Recorder (SER).
- Use acSELerator QuickSet SEL-5030 Software to manage your relay settings.
- Use Synchrowave Event Software to display oscillograms and vector diagrams to analyze event reports.
SEL-351 Features
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- USB port simplifies local connections and speeds up relay communications.
- Default displays or programmable custom messages notify personnel of power system events or relay status.
- Front-panel LEDs alert operators in the substation to faulted phases, relay status, and element operation.
- Optional SafeLock trip/close pushbuttons and bright indicating LEDs allow breaker control independent of the relay.
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- High-current interrupting output contacts increase contact robustness and reliability.
- Expanded I/O allows for flexible applications.
- Harmonic metering to the 16th harmonic enhances power quality analysis.
- Dual copper Ethernet port allows communication between devices and provides redundancy. Single or dual fiber-optic ports are also available.
- Standard multisession Modbus TCP, Modbus RTU, DNP3, and IEC 61850* provide communications flexibility.
- Mirrored Bits communications provides fast and reliable relay-to-relay communication.
- EIA-485 port provides quick and easy engineering access.
- SafeLock trip/close pushbuttons on the front panel are wired directly to these terminals to allow breaker control independent of the relay.
- Sensitive earth fault (SEF) protection accurately detects ground faults with low current values.
- Built-in phasor measurement unit allows wide-area power system monitoring.