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.
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.
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.
USB port simplifies local connections and speeds up relay communications
Front-panel LEDs alert operators in the substation to faulted phases, the relay’s 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
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
|Product||Revision||Firmware ID||Date Available||Serial Number|
|SEL-351A||R518-V1||SEL-351A-R518-V1-Z107106-D20210917||9/28/21||~1212710001 or ~3212710001|
|SEL-351A-1||R518-V1||SEL-351A-1-R518-V1-Z107106-D20210917||9/28/21||~1212710001 or ~3212710001|
The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.
QuickSet is a tool for engineers and technicians to quickly and easily configure, commission, and manage power system devices. QuickSet includes a Graphical Logic Editor and a device template tool to reduce configuration time and streamline deployment.
Learn more and download on the QuickSet software page.
Architect allows users to configure and document IEC 61850 systems that include GOOSE, Sampled Values (SV), or Manufacturing Message Specification (MMS) communications. Architect automatically compares SCL files with IEC 61850 requirements to ensure standard compliance.
Learn more and download on the Architect software page.
Available on the Blueframe platform, DMA applications automatically collect, store, and manage device-specific information like oscillography, Sequence of Events (SOE) data, device settings, and property information. They also provide automated password rotation and streamlined device audits.
Learn more on the DMA software page.
synchroWAVe Event helps engineers diagnose a protective relay’s behavior during a power system fault. It is a powerful and easy-to-use solution for displaying and analyzing SEL relay event reports and COMTRADE files.
Learn more and download on the synchroWAVe Event software page.