351A#01
Price: $2,308.39
- Feeder protection
- Dual Ethernet ports for backup fail-over communications channel
- Horizontal rack mount
SEL-351A
Protection System
The SEL-351A Protection System has built-in Ethernet and IEEE C37.118 synchrophasors, and is the economical solution for overcurrent protection. Easy-to-use feeder protection and innovative features like SEL’s Best Choice Ground Directional Element logic and SELogic control equations provide superior protection on utility and industrial power systems.
Starting at
$2,320
Comprehensive Protection
Provide primary or backup overcurrent protection on distribution feeders with sensitive phase, negative-sequence, residual, and neutral overcurrent protection elements.
Relay Access Convenience
Access basic relay information on a standard Ethernet network with the built-in web server. Securely update firmware and view relay status, settings, and other read-only information within a local network.
Protection Scheme Security
Set the bus overcurrent backup relay close to maximum bus load current levels by using load-encroachment logic to increase security in the system.
- Integrate and automate substation equipment, even devices from multiple vendors, with IEC 61850 communications protocol.
- Provide primary or backup overcurrent protection on distribution systems with sensitive phase, negative-sequence, residual, and neutral overcurrent protection elements.
- Set the sensitive phase and ground directional elements for accurate and secure fault detection.
- Enhance sensitivity with two independent residual ground time-overcurrent elements.
- Measure and record in nonvolatile memory MW, MVAR, MWh, MVARh, PF, instantaneous and/or peak demand, eliminating the need for external meters.
- Provide multistep load-shedding schemes using under-/overfrequency elements.
- Use acSELerator QuickSet SEL-5030 Software to manage your relay settings.
- Use SYNCHROWAVE Event Software.
Fault Location
Estimate fault locations accurately and reduce total costs by eliminating the need for expensive communications channels, special instrument transformers, prefault information, or line crews to travel the distance of the line for visual fault inspection.
Optimized Asset Utilization
Validate system load flow and fault models by using instantaneous voltage angles from IEEE C37.118 synchrophasors. Use system-state measurements to increase stable system loading through reduced margin requirements.
SEL-351A Features
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- USB port simplifies local connections and speeds up relay communications.
- Front-panel LEDs alert operators in the substation to faulted phases, relay status, and element operation.
- Default displays or programmable custom messages notify personnel of power system events or relay status.
- 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.
- SafeLock trip/close pushbuttons on the front panel are wired directly to these terminals to allow breaker control independent of the relay; this is an optional feature.
- Harmonic metering to the 16th harmonic enhances power quality analysis.
- Sensitive earth fault (SEF) protection accurately detects ground faults with low current values; this is an optional feature.
- Built-in phasor measurement unit allows wide-area power system monitoring.
- Dual copper Ethernet port allows communication between devices and provides redundancy.
- Standard multisession Modbus TCP, Modbus RTU, DNP3, and IEC 61850 provide communications flexibility; this is an optional feature.
- EIA-485 port provides quick and easy engineering access.