SEL
SEL-351S

SEL-351S Protection System

Ordering Information

Budgetary Price:
$2,550

Fully Optioned Price:
$5,930

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The SEL-351S Protection System has built-in Ethernet and IEEE C37.118 synchrophasors, expanded operator controls, and optional SafeLock trip/close pushbuttons. Perfect for industrial and utility feeder protection. Enhance your quality of service through lower costs and expanded operator controls for integrated protection, monitoring, and control schemes. The SEL-351S offers comprehensive feeder and overcurrent protection and innovative features like Mirrored Bits, synchrophasors, and SEL's Best Choice Ground Directional Element.

  • IEC 61850 Communications Protocol 

    Combine IEC 61850 technology, Ethernet network, and the SEL-351S Protection System for the fastest overall performance of IEC 61850 relays for substation automation and control. Streamline configuration of IEC 61850 enabled relays with acSELerator Architect® SEL-5032 Software. 

  • Built-In Web Server 

    Access basic relay information on a standard Ethernet network with the built-in web server. View relay status, Sequential Events Recorder (SER), metering information, and settings for easy access within a local network. Web server access requires relay password and is limited to read-only viewing of information. 

  • Simple Network Time Protocol 

    Simplify wiring and installation by receiving a time signal over existing Ethernet networks. SNTP makes a good backup to more accurate IRIG time synchronization. The 5 ms accuracy is ideal for basic time synchronization throughout a substation. 

  • Substation-Hardened Ethernet 

    An Ethernet port is included on every SEL-351S Relay. Multiple Ethernet options simplify integration into new or existing Ethernet networks. Enhance reliability and availability by incorporating dual-port Ethernet SEL-351S Relays in a self-healing ring structure or in a dual-redundant configuration.

  • Built-In IEEE C37.118 Synchrophasors 

    Monitor distribution and transmission networks to detect potential cascading voltage collapse before it happens. IEEE C37.118 synchrophasors, at up to 60 messages per second, allow access to system values for wide-area monitoring and control. The IEEE C37.118 standard simplifies communication and data coordination between synchrophasor measurement units.

  • SafeLock™ Trip/Close Pushbuttons 

    Optional independent trip/close pushbuttons and high-visibility indication provide direct breaker control. Simplify installation and panel wiring with built-in control switches. The SafeLock system keeps pushbuttons secure when not in use and accommodates tag-out procedures.

  • Innovative Directional Element Polarization 

    Positive-sequence voltage-polarized phase directional element with memory for directional stability during phase faults. Best Choice Ground Directional Element™ system logic for secure ground directional element operation for all types of system grounding practices under varying system conditions.

  • Large Operator Controls 

    Large front-panel keyboard with local display panel and programmable operator control interface pushbuttons to replace unnecessary control switches and wiring at the breaker control panel.

  • Under- / Overfrequency Protection 

    Six levels of frequency elements, plus under- / overvoltage protection for advanced load shedding.

  • Mirrored Bits® Communications Technology 

    Provides fast and reliable relay-to-relay communication for advanced communications-assisted protection, network reconfiguration, pilot protection, and restoration schemes. Learn more. 

  • Reclosing Control 

    Four-shot recloser with sequence coordination, synchronism check, and voltage check.

  • Modbus, DNP3, and ASCII protocols 

    Easily integrate into new or existing networks with these popular protocols. SCADA links, local HMI, and dial-in modems can access important relay data.

  • Recloser Time-Overcurrent Curves 

    Use any of the 38 traditional recloser curves in the SEL-351S Relay to time-coordinate with downstream circuit reclosers. Sequence coordination keeps the SEL-351S in step with downstream reclosers and prevents tripping by overreaching overcurrent elements for faults beyond reclosers. Five-each standard US and IEC time-overcurrent curves provide coordination with other time-overcurrent relays.

  • Fault Locator 

    Impedance-based fault locator for accurate distance to fault measurements.

  • Metering, Power Quality (PQ) Monitoring 

    Accurate metering eliminates the need for external meters (MW, MVAR, MWh, MVARh, PF, RMS, and  instantaneous/peak demand). Harmonic metering to the 16th harmonic simplifies power quality analysis. Optional power quality monitoring records voltage sags, swells, and interruptions.

  • Input Voltage Settings 

    Select line-neutral (wye) or line-line (delta) input ac voltage connections using software setting.

  • acSELerator® Software  

    Helps speed relay application by allowing you to develop relay settings offline, program SELogic® control equations, and analyze post-fault event reports.

  • Integrate and automate substation equipment, even devices from multiple vendors, with IEC 61850 communications protocol.
  • Replace older electromechanical relay schemes, control switches, and metering devices in outdoor breaker control enclosures.
  • Commission automatic substation restoration schemes using programmable user interface controls and Mirrored Bits communications.
  • Use the programmable control logic and integration features with a communications link for control and protection of remote substations.
  • Selectively coordinate with downstream SEL-351R Recloser Controls (applied on circuit reclosers) using a Mirrored Bits communications link for secure, high-speed fault clearing on distribution circuits and industrial cogeneration facilities.
  • Send synchrophasor data to SCADA and wide-area measurement systems using IEEE C37.118 messages at rates of up to 60 messages per second. Use SEL-5077 synchroWAVe® Server Software or the SEL-3306 Synchrophasor Processor to time-correlate synchrophasor data from SEL-351S Relays and send the information to display and archiving systems, such as SEL-5078 synchroWAVe Console Software and SEL-5076 synchroWAVe Archiver Software.

    synchroWAVe 

  • Dispatch line crews to quickly isolate overhead line problems, and restore service faster using built-in fault locator, as compared to patrolling the line.
  • Schedule circuit breaker maintenance based on need as determined from breaker-monitoring data and alarms.
  • Analyze overcurrent protection system performance using built-in Sequential Events Recorder (SER). 
  • Use acSELerator Report Server SEL-5040 Software to automatically gather relay event reports on your PC and manage them with a database.
  • Use SEL-5010 Relay Assistant Software to manage your relay settings.
  • Use acSELerator Analytic Assistant SEL-5601 Software to display oscillograms and vector diagrams to analyze event reports.
  • IEC 61850 communications protocol
  • Front-panel USB communications port 
  • SafeLock independent trip/close pushbuttons

     

     

  • Dual copper, single or dual fiber-optic Ethernet ports
  • EIA-485 serial port
  • Mirrored Bits communications and load profiling
  • Additional inputs and standard or high-current interrupting contact outputs
  • Low-range neutral current input channel for nondirectional sensitive earth fault (SEF) applications
  • Low-range neutral current channel for directional control for Petersen coil-grounded, high-impedance-grounded, or ungrounded power systems
  • Power elements, voltage sag/swell/interruption records 
  • User-configurable labels for operator controls and target LEDs
  • Conformal coating—Protects equipment from harsh environments and airborne contaminants such as hydrogen sulfide, chlorine, salt, and moisture

     

  • SEL provides options to help you efficiently and safely commission and test these relays.

  • SEL-4391 Data Courier 

    Streamline commissioning by using the SEL-4391 Data Courier®  to send and retrieve settings, gather event reports, and install enhancements.

 SEL University Training

APP 351: SEL-351 Protection System

This course provides comprehensive application training for the SEL-351 Directional Overcurrent and Reclosing Relay, an extremely flexible protective relay used by utilities worldwide in multiple applications.

COM 403: IEC 61850 Technology
IEC 61850 was created to be an internationally standardized method of communication and integration and to support systems built from multivendor intelligent electronic devices (IEDs) that are networked to perform protection, monitoring, automation, metering, and control functions. In this communications fundamentals course, you will learn about the components and protocols that make up the IEC 61850 standard. During this one-day course, you will walk through the IEC 61850 planning process and identify key network considerations. This course also provides a concise introduction to the concepts that will be applied in SYS 403.
SYS 403: Practical IEC 61850 Application
The international standard IEC 61850 was designed to standardize communications and integration methods and to support systems built from multivendor intelligent electronic devices (IEDs) that are networked to perform protection, monitoring, automation, metering, and control functions. SYS 403 is designed to be interactive and activity based. During this course, you will configure and implement a realistic IEC 61850 communications and automation scheme. Each unit of this course will guide you, step-by-step, through configuring this comprehensive communications and automation scheme.
TST 103: SEL Feeder Relay Testing

This course covers skills required to enter settings, test, commission, and troubleshoot SEL relays.

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2350 NE Hopkins Court
Pullman, WA 99163 - USA
Phone: +1.509.332.1890
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