SEL
SEL-387E

SEL-387E Current Differential and Voltage Relay

Ordering Information

Budgetary Price:
$5,780

Fully Optioned Price:
$7,853

Online Product Configuration

SEL-387E Relay

SEL-387E Connectorized Relay

The SEL-387E Current Differential and Voltage Relay provides protection to two- or three-winding power transformers. Voltage inputs for power metering, overexcitation protection, and over-/underfrequency load shedding provide versatile solutions for power apparatus protection. Automation features reduce total project construction and operation costs through elimination of traditional external control switches, meters, and indicating lamps.

  • Two- and Three-Winding Current Differential Protection
    Sensitive current differential protection with programmable single- or dual-slope percentage restraint, supervised by a choice of second- and fourth-harmonic blocking or restraint elements, plus fifth-harmonic and dc blocking elements for secure protection of up to three windings. Phase current harmonic blocking is set for either common or independent winding basis. Unrestrained high-set differential elements provide fast operation for high-magnitude internal faults. "Around the clock" phase angle compensation settings and automatic tap calculations simplify settings.
     
  • Individual Winding Overcurrent Protection
    Torque-controllable overcurrent elements, including one instantaneous, one definite-time, and one inverse-time element, each for phase, negative-sequence, and residual ground currents, provide comprehensive overcurrent protection on each winding input. Combined overcurrent feature sums current from two inputs for ring bus and breaker-and-a-half overcurrent applications.
     
  • Through-Fault Recording and Monitoring 
    Through-fault duty is recorded and accumulated for use in SELogic® control equations or manual monitoring.
     
  • Overexcitation (V/Hz) Protection
    Volts-per-hertz elements detect overexcitation conditions in the protected apparatus. Choose from multiple curves (including user-defined) and definite-time elements for alarm and tripping applications.
     
  • Over- / Underfrequency Protection
    There are six available frequency elements. The user sets the desired number of frequency elements.
     
  • Restricted Earth Fault
    Restricted Earth Fault (REF) logic for sensitive protection of grounded wye windings.
     

  • Built-In Web Server 

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

  • Control Logic
    SELogic control equations with SELogic variables, timers, latch bits, and remote control elements for customizing advanced protection and control schemes. Local programmable control elements and programmable text display points for advanced local operator interface.
     
  • Metering and Reporting
    Oscillographic event reports (up to seven 60-cycle reports), Sequential Events Recorder (SER) reporting, and accurate three-phase power metering eliminate or reduce external recorder and metering requirements. Station battery monitor and circuit breaker contact wear monitor provide important data for Reliability Centered Maintenance (RCM) programs.
     

  • Communications
    EIA-232 and EIA-485 serial ports for local/remote access and system integration.

    Download event reports using the optional Ethernet port. Quickly move information with IEC 61850 protocol, which includes a Select-Before-Operate function for added operational security. Increase communications dependability with dual failover Ethernet.

  • acSELerator QuickSet® SEL-5030 Software 

    Develop relay settings offline, program SELogic control equations, and analyze post-fault event reports.
     

 
  • Protect any two- or three-winding power transformer.
     
  • Protect reactors, generators, large motors, and other multiterminal power apparatus.
     
  • Apply with any combination of delta- or wye-connected CT and PT secondary circuits.
     
  • Perform predictive maintenance based on accumulated through-fault duty as compared to transformer capability as defined in ANSI Standard C57.109. Use recorded fault values or an alarm set point to initiate an evaluation of transformer maintenance needs.
     
  • Provide backup protection with built-in winding overcurrent elements.
     
  • Use one or more of the six available frequency elements for load shedding and/or load restoration schemes.
     
  • Reduce or eliminate the need for panel-mounted metering devices by using the accurate three-phase power and energy metering capabilities of the relay.
     
  • Create breaker failure logic with SELogic control equations.
     
  • Detect ground faults through delta-wye transformer banks, or provide sensitive phase-to-phase protection, independent of load current, with negative-sequence overcurrent element.
     
  • Use low-side overcurrent elements for backup distribution bus or feeder protection.
     
  • Automatically send acSELerator Report Server® SEL-5040 Software relay event reports to your PC and manage them with a database.
     
  • Manage your relay settings with SEL-5010 Relay Assistant Software.

  • Use acSELerator Analytic Assistant® SEL-5601 Software to display oscillograms and vector diagrams to analyze event reports.

     

  • Horizontal  and vertical mounting hardware options:

    • Horizontal projection-, panel-, or rack-mount
    • Vertical panel- or rack-mount

     

  • Additional contact inputs and standard or high-current interrupting output contacts.
     
  • Connectorized® packaging (includes additional contact inputs and output contacts).
     
  • Additional local and remote control elements and binary SER messaging.
     
  • Distributed Network Protocol (DNP) 3 Level 2 Outstation communications protocol.
     

  • Conformal Coating—Protect equipment from harsh environments and airborne contaminants such as hydrogen sulfide, chlorine, salt, and moisture.
     

    Learn more about conformal coating.
     

  • Use the SEL recommended standard block and plug configurations for SEL-387E relays.
  • Add independent breaker control to any relay. The SEL-9510 Control Switch Module easily installs in panel or rack locations for independent local control and status indications.

  • SEL-2600 RTD Module 

    Measure and transmit data from up to 12 RTDs and a single contact status located in transformers, breakers, motors, generators, or other system apparatus.
     

  • SEL-2812 Fiber-Optic Transceiver  

    Directly connect the SEL-2812 Fiber-Optic Transceiver to an EIA-232 serial port on the SEL-300G to communicate via a simplex SEL-C807 Fiber-Optic Cable  to an SEL-2600 or SEL-2664. Or, use a two-fiber C807 cable to communicate with an SEL-3530 Real-Time Automation Controller (RTAC) or other information processor, for full-duplex data communication and IRIG-B time sychronization.
     

  • SEL-9220 Fiber-Optic Adapter for SEL-300 Series Relays   

    Directly connect the SEL-9220 Fiber-Optic Adapter for SEL-300 Series Relays to the EIA-485 serial port on the SEL-300Gto communicate via a simplex SEL-C807 Fiber-Optic Cable  to an SEL-2600 or SEL-2664. Or, use a two-fiber C807 cable to communicate with an SEL-3530 Real-Time Automation Controller (RTAC) or other information processor, for full-duplex data communication and IRIG-B time sychronization.

  • SEL-2800 Fiber-Optic Transceiver 

    Directly connect the SEL-2800 Fiber-Optic Transceiver to an EIA-232 serial port on the SEL-300G to communicate via a simplex V-pin terminated  SEL-C805 Fiber-Optic Cable  to an SEL-2600 RTD Module with the SEL-2800 compatible option.
     

 SEL University Training

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 107: SEL Transmission Substation Relay Testing

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

Access drawings via the Online Product Configuration link in the Ordering Information box at the top right of this page (below the product photo).

From the Product Configuration page, configure your product or enter your part number via the Universal Part Number Reverse Lookup. Then download custom .dwg or .pdf files specific to your product.

You may also go directly to the Product Configuration page to make a product selection.

To view the latest firmware version currently shipping with this product, go to the Latest Firmware Version page.

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Pullman, WA 99163 - USA
Phone: +1.509.332.1890
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