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SEL-710-5

Motor Protection Relay

Protect asynchronous (induction) and synchronous motors with one SEL-710-5 Motor Protection Relay. Features include broken rotor bar detection and variable-frequency drive (VFD) support as well as options for arc-flash detection (AFD), differential protection, and synchronous motor protection. The synchronous option supports power factor regulation and includes, at no additional cost, a voltage divider accessory to interface with the motor excitation system.

An optional 5-inch, 800 × 480 color touchscreen display allows you to directly set, monitor and control your system. You can quickly integrate the SEL-710-5 into serial-or Ethernet-based communications schemes with IEC 61850 Edition 2, IEC 60870-5-103, the IEC 62439 Parallel Redundancy Protocol (PRP), Mirrored Bits communications, Modbus, DNP3, and other protocols. Together with the industry’s best AccuTrack Thermal Model, these features combine to provide a great solution for all of your motor protection applications.

Starting At

$USD3,000

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Motor Protection—Protect a full range of medium-voltage, three-phase induction and synchronous motors. The slip-dependent thermal model (AccuTrack) allows independent thermal protection of both the rotor and stator.

Arc-Flash Mitigation—Select optional arc-flash detection (AFD) inputs for overcurrent-supervised arc-flash protection. Reduce incident energy further by selecting high-speed, high-current interrupting output contacts to achieve secure, reliable, and fast arc-flash tripping.

Differential Protection—Configure current differential elements for more comprehensive protection of large, high-value motors.

Broken Rotor Bar Detection—Detect broken rotor bars in squirrel-cage induction motors by implementing the optional spectrum analysis features. Minimize repair costs and downtime by detecting rotor bar problems before they cause catastrophic motor failure.

Synchronous Motors—Protect synchronous motors (brush and brushless). Use the optional inputs for measuring and controlling excitation system signals on brushed motors. Regulate power factor using digital or analog outputs of the relay connected directly to the excitation system.

Front-Panel Flexibility—Improve functional control and situational awareness with the programmable auxiliary buttons, LEDs, and configurable labels.

Metering and Monitoring—Analyze SER reports and oscillographic event reports for rapid commissioning, testing, and post-fault diagnostics. Use the SEL-710-5 Relay’s motor start report, motor start trending, load profile monitoring, motor operating statistics, and demand metering features to reduce separately mounted metering/monitoring devices.

Flexible Communications—Choose from single or dual ports, copper or fiber-optic Ethernet or serial communications, and several protocols, including IEC 61850 Edition 2, IEC 60870-5-103, PRP, Mirrored Bits communications, DNP3 serial, and DNP3 LAN/WAN. You can select from multiple Modbus TCP or Modbus serial sessions for custom configuration of your application.

Touchscreen Display Features and Functions

710-5 home

With a simple tap, quickly access bay screens, metering and monitoring data, reports, settings, and more.

Touchscreen Display Features and Functions

710-5 control

To control a motor, simply tap the Control folder on the home screen, and then tap Start Motor or Stop Motor.

Touchscreen Display Features and Functions

710-5 authentication

Use the onscreen keyboard to quickly and easily enter passwords, search for Relay Word bits, and enter settings.

Touchscreen Display Features and Functions

710-5 Start motor

Control the motor using the secure control interface.

Touchscreen Display Features and Functions

710-5 fundatmental

View the real, reactive, and apparent power of each phase, and monitor the power factor.

Touchscreen Display Features and Functions

710-5 phasor

View a graphical and textual representation of the real-time voltages and currents in a power system. Analyze the phasors to determine power system conditions.

Touchscreen Display Features and Functions

710-5 energy metering

Display the real, reactive, and apparent power of each phase in your system, and monitor the power factor information.

Touchscreen Display Features and Functions

710-5 SER

Easily review the time-stamped Sequential Events Recorder (SER) data, including whether or not the Relay Word bit asserted or deasserted, during root cause analysis of an event.

Overview

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Videos

How to Use the SEL-700 Series Color Touchscreen Display

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How to Use the SEL-700 Series Color Touchscreen Display

How to Set SEL-700 Series Bay Screen Settings

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How to Set SEL-700 Series Bay Screen Settings

Reduce Arc-Flash Hazards

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Reduce Arc-Flash Hazards

Advanced Protection
The SEL-710-5 provides advanced protection for induction and synchronous motors. Protection includes thermal overload, overcurrent, undercurrent, current unbalance, current differential, phase loss, ground fault, loss-of-field, over- or underfrequency, and much more.

Optimized Start Times
The SEL-710-5 calculates percent of thermal capacity used in the motor to determine maximum safe start times with full motor protection. Accurate tracking of the motor thermal capacity also minimizes the time needed between starts.

Convenient Controls
Use the eight programmable pushbuttons and 16 configurable tricolored LEDs on the front panel for quick, personalized control, with factory default start and stop functions.

Rugged Design
Install in extreme environments with the industry’s widest ambient temperature operating range, –40° to +85°C (–40° to +185°F).

Easy Communications
Quickly integrate the SEL-710-5 into serial- or Ethernet-based communications with IEC 61850 Edition 2, IEC 60870-5-103, PRP, and Mirrored Bits communications, DNP3 serial, and DNP3 LAN/WAN and other protocols.

IEC 61850 Edition 2 Communications Protocol
Combine IEC 61850 Edition 2, an Ethernet network, and the SEL-710-5 for the fastest overall performance for substation automation and control. You can improve security using the password authentication and session time-out features, transfer event files in COMTRADE and CEV formats, and transfer CID files, settings, and reports. acSELerator Architect SEL-5032 Software streamlines the configuration of IEC 61850 in the SEL-710-5.

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

Optional Touchscreen Display
The easy-to-use touchscreen interface provides a one-line mimic display for bay control and monitoring. You can view metered quantities, phasor diagrams, relay settings, event summaries, target statuses, Sequential Events Recorder (SER) data, and more. Extensive testing shows that the robust capacitive touchscreen display meets or exceeds industry standards as well as SEL quality and reliability requirements.

Convenient Controls
Use the programmable pushbuttons with tricolor LEDs on the front panel for quick, personalized control.

Expanded SELogic Control Equations
Use math and logic combinations of analog and digital values for customized applications. You can adapt system control based on prefault conditions and scale analog values and latch momentary inputs for SCADA retrieval.

Metering and Reporting
View SER and 180-cycle oscillographic event reports in COMTRADE and CEV formats for rapid commissioning, testing, and post-fault diagnostics. Ethernet FTP or IEC 61850 MMS allows you to easily retrieve COMTRADE files.

AccuTrack Thermal Model
Apply the SEL-710-5 to dynamically calculate motor slip and precisely track the rotor thermal capacity used. The AccuTrack Thermal Model uses this information to reduce the time between starts and give the motor more time to reach its rated speed before tripping.

Motor Thermal Overload Protection
The SEL-710-5 provides locked-rotor, running overload, and negative-sequence current unbalance protection. It uses the AccuTrack Thermal Model to accurately track the heating effects of load current and current unbalance during the motor’s operating conditions (starting and running).

Arc-Flash Detection (AFD)
AFD-based protection is fast, responding in a few milliseconds with high-speed, high-current interrupting output contacts. This fast response, supervised by phase overcurrent elements, provides high-speed and secure arc-flash protection that improves personnel safety and reduces equipment damage. Arc-flash mitigation options in the SEL-710-5 offer either four or eight AFD inputs capable of reading both point and loop sensors.

  • Flexible I/O for Local Control and System Applications: The base unit includes three digital outputs and two digital inputs. There are three card slots for optional SELect I/O cards, including the following:
    • 4 digital inputs (DI) and 4 digital outputs (DO)
    • 4 fast hybrid DO and four DI
    • 8 DI
    • 8 DO
    • 4 DO, 3 DI, and 1 analog output (AO)
    • 4 analog inputs (AI) and 4 AO
    • 8 AI for dc process values
    • 10 resistance temperature detector (RTD) inputs
    • 3 ac current (differential) and 4 arc-flash detection (AFD) inputs
    • 3 ac current (differential) and synchronous inputs
    • 8 AFD inputs
    • Neutral ac current input on SELect 4 ACI/3 AVI card for optional 5 A, 1 A, and 2.5 mA range
    • 14 DI
  • Choice of IRIG-B time-code input or PTC (thermistor) input.
  • External RTDs (12 RTD inputs and one contact input on SEL-2600A or SEL-2600D RTD Module mounted near motor).
  • Many communications media and protocol options. Versatile communications options provide fast integration into both new and existing applications.
    • Communications Media
      • Ethernet 10/100BASE-T
      • Ethernet 100BASE-FX
      • Single or dual Ethernet ports
      • EIA-232 serial
      • EIA-485 serial
      • Fiber-optic serial multimode ST
    • Communications Protocols
      • Mirrored Bits communications
      • IEC 61850 Edition 2
      • IEC 60870-5-103
      • IEC 62439 PRP for models with dual Ethernet
      • DNP3 LAN/WAN
      • DNP3 Serial
      • Modbus TCP
      • Modbus RTU
      • Telnet
      • FTP
      • IEEE C37.118 synchrophasors
      • Simple Network Time Protocol (SNTP)
  • Conformal Coating: Protect equipment from harsh environments and airborne contaminants, such as hydrogen sulfide, chlorine, salt, and moisture.
  • Retrofit Replacement Kits:
    • GE 469 - SEL-710 kit P/N 915900055
    • GE 369 - SEL-710 kit P/N 915900054
    • GE 269 - SEL-710 kit P/N 915900054
    • Cutler-Hammer MP-3000 - SEL-710 kit P/N 915900057
    • Other mounting-kit options are available.

Literature

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Literature

Drawings

Minimum QuickSet Version

Product Revision Z Number Minimum Software Version
SEL-710-5 R102-V0 002 6.6.0.0

Please contact Application Engineer for firmware related to your hardware platform. The current revision does not apply to all hardware.

Minimum QuickSet Version

Product Revision Z Number Minimum Software Version
SEL-710-5 R102-V0 002 6.6.0.0

Please contact Application Engineer for firmware related to your hardware platform. The current revision does not apply to all hardware.

Product Certifications