html{display:none} SEL-749M Motor Relay | Schweitzer Engineering Laboratories
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    SEL-749M

    Motor Relay

    SEL recommends selecting the SEL-710-5 Motor Protection Relay or the SEL-849 Motor Management Relay in place of the SEL-749M. The SEL-710-5 protects a full range of medium-voltage, three-phase induction and synchronous motors and is available with a color touchscreen display. The SEL-849 protects low- or medium-voltage three-phase induction and variable-frequency drive-fed motors and can be easily installed inside a motor control center.

    SEL will continue to support and warranty the SEL-749M.

    Motor Protection Features

    Starting At

    $1,650
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    Low- and Medium-Voltage Motor Protection—Protect low- and medium-voltage induction and synchronous motors. The reliable and economical SEL-749M also protects three-phase motors, including two-speed and reduced-voltage start motors.

    Extensive Communications and Software—Communicate seamlessly with built-in SEL ASCII and optional Modbus protocols. Quickly and easily set the SEL-749M with the included Microsoft Windows-based acSELerator QuickSet SEL-5030 Software. View start reports, motor trends, and real-time motor values with the complete meter and control features included in acSELerator Software.

    Comprehensive Start Reports and Trends—Track motor performance during the critical starting period with complete motor start reports and 30-day average motor start trending.

    Option Cards for Added Functionality—Customize the relay for your particular protection and control applications. Field-install option cards into the base relay to obtain voltage-based protection/control, increased digital I/O, and 4–20 mA analog output.

    Features

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        Front-panel EIA-232 serial port

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        Default messages or up to 32 customizable display labels notify personnel of power system events or the relay status

      3. 3

        2 × 16 character LCD provides navigation, relay control, data, and diagnostics

      4. 4

        Programmable front-panel LEDs with user-configurable labels alert operators to faulted phases, the relay’s status, and element operation

      5. 5

        Six-button keypad enables simple navigation for settings, status, and access to event reports

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        Secondary input current: 1 A phase or 5 A phase or 1 A neutral or 5 A neutral

      2. 2

        3-phase ac voltage input; 300 Vac maximum

      3. 3

        Optional I/O expansion: three digital inputs, four digital outputs, one 4–20 mA output

      4. 4

        Optional communications card includes an EIA-485 port, an additional EIA-232 port, and the Modbus RTU protocol

      5. 5

        Port options include demodulated IRIG-B for precise-time input or a PTC input to thermally monitor protected equipment

      6. 6

        Power supply options include 125/250 Vdc/Vac or 24/48 Vdc/Vac. The relay also includes two digital inputs and three digital outputs.

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    Details

    True Temperature-Based Thermal Overload Protection
    Eliminate false tripping, especially during cyclic overload operations.

    Comprehensive Start Reports and Trends
    Track motor performance during the critical starting period with complete motor start reports and 30-day average motor start trending.

    Option Cards Add Functionality
    Customize the relay to suit your particular protection and control applications with optional voltage, I/O, and communications cards.

    Increase Operating Time by Using Complete Reporting
    Simplify troubleshooting using valuable, stored information about motors and processes from motor statistics, oscillograms, event reports, and sequential events records.

    Extensive Communications and Software Capabilities
    Communicate seamlessly with built-in SEL ASCII Fast Meter, Fast Operate, and Fast SER protocols, and EIA-232 as standard. Add optional Modbus protocol for connecting to your digital control system. Quickly and easily set the SEL-749M with the included Microsoft Windows-based acSELerator QuickSet SEL-5030 Software.

    Compact, Ruggedized Hardware
    Mount this UL/IEC short-mounting-depth relay in any motor control center.

    • Expandable I/O: Add programmable, interlocking monitoring and control with the I/O expansion card.
    • Voltage Inputs: Use voltage, power, and power factor protection and measurement with the optional voltage inputs card.
    • Communications options include a communications card with an EIA-485 port, an additional EIA-232 port, and Modbus RTU protocol.
    • External RTDs: 12 RTD inputs and one contact input on an SEL-2600A or SEL-2600D RTD Module mounted near a motor.
    • Projection Mounting Collars: A 45 mm collar and a 90 mm collar are available to mount the SEL-749M in locations with restricted depth clearance.
    • Wide Power Supply Range: Choose from 110–250 Vdc, 110–230 Vac, or 24–48 Vdc.
    • Digital input card to sense contact status of up to 8 inputs. 24, 48, 110, 125, 220, and 250 Vdc/Vac inputs available.
    • Conformal Coating: Protect equipment from harsh environments and airborne contaminants, such as hydrogen sulfide, chlorine, salt, and moisture.
    749M#01
    Price: $2,340.04
    Savings: $89.00
    Typically Ships in Days Select Models Typically Ship in Days  

    • Low- and medium-voltage motor protection
    • Electromechanical relay retrofit

    Model Details  

    Minimum Software Version

    Product Revision Z Number acSELerator QuickSet Version SEL Grid Configurator Version
    SEL-749M R207 004 6.6.0.0
    Please contact Application Engineer for firmware related to your hardware platform.  The current revision does not apply to all hardware.

    Latest Firmware Versions

    There are no firmware versions available for this product.

    Product Revision Firmware ID Date Available Serial Number
    SEL-749M R207-V3 SEL-749M-R207-V3-Z004005-D20201111 11/24/20 ~3203290001
    SEL-749M R112-V1 SEL-749M-R112-V1-Z003004-D20150731 9/5/15 1152480001 or 3152480001
    Please contact Application Engineer for firmware related to your hardware platform.  The current revision does not apply to all hardware.

    The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.

    Minimum Software Version

    Product Revision Z Number acSELerator QuickSet Version SEL Grid Configurator Version
    SEL-749M R207 004 6.6.0.0
    Please contact Application Engineer for firmware related to your hardware platform.  The current revision does not apply to all hardware.

    749M - Software Tab

    Configuration

    acSELerator QuickSet SEL-5030 Software

    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.


    Automated Data Collection

    SEL Data Management and Automation (DMA) Application Suite

    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.


    Visualization and Analysis

    SEL-5601-2 Synchrowave Event Software

    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.