SEL-311A

SEL-311A Phase and Ground Distance Relay

Ordering Information

Budgetary Price:
$1,890

Fully Optioned Price:
$2,518

Online Product Configuration

SEL-311A, B, C Relays

SEL-311A, B, C Connectorized Relays

Implement subtransmission, or backup distance protection at a very low cost with the SEL-311A Relay.

 

The SEL-311A Relay includes two zones of positive sequence memory polarized distance protection or compensator distance protection. One level of directional or non-directional phase and ground overcurrent protection is also included. Automation features, such as SELogic® Control Equations, Local, Remote, and Latching Switches, and Mirrored Bits® communications are incorporated in the relay. The SEL-311A Relay also provides a wire-alike solution and application settings for the SEL-2PG10 Relay.

  • Simple and Economical Line Protection
    Two forward-looking zones of phase and ground mho distance elements for simple and economical distance protection. Phase and ground inverse-time and definite-time overcurrent elements provide backup protection.

  • Innovative Logic for Secure and Stable Operation
    Innovative logic detects CCVT transients and prevents Zone 1 overreach on high SIR applications. Positive-sequence memory voltage polarization provides dependable, secure operation for close-in faults by expanding the mho operating characteristics in proportion to the source impedance. Best Choice Ground Directional Element™ logic for adaptive ground fault directional polarization.

  • Synchrophasor Measurements
    Turn state estimation into state measurement with wide-area measurement of voltage and current phase angles and magnitudes. Improve system stability with high-speed, load-angle measurements. Increase stable loading with analysis of voltage and angular stability.

  • Monitoring and Metering
    Event reports, Sequential Events Recorder (SER), circuit breaker contact wear monitor, substation battery monitor, and instantaneous and demand metering.

  • Communications
    EIA-232 and EIA-485 serial ports for local/remote access and system integration. Mirrored Bits communications for eight channels of secure relay-to-relay logic communications available on both rear-panel EIA-232 serial ports.

  • Advanced Protection and Control Logic
    SELogic control equations with 16 SELogic variables, 16 timers, 16 latch bits, and 16 remote control elements for customizing advanced protection and control schemes. Sixteen local control elements and 16 programmable display points with optional front-panel LCD and operator pushbuttons.

  • Implement wire-alike and application setting upgrades for popular SEL-2PG10 distance relay applications.

  • Use step distance protection for primary and backup three-pole tripping on non-series-compensated transmission and subtransmission lines.

  • Send synchrophasor data to SCADA and wide-area measurement systems using SEL Fast Messages at rates of up to 60 times per minute. Accuracy of ± 1 degree and microsecond timing of event reports improve system visualization and event analysis.

    Use SEL-5077 synchroWAVe® Server Software to time-correlate synchrophasor data from SEL-311 Relays and send it to display and archiving systems, such as SEL-5078 synchroWAVe Console Software

  • Use accurate fault locator to efficiently dispatch line inspection and repair personnel.

  • Program breaker failure logic with SELogic control equations.

  • Back up transformer and generator protection with zone distance and overcurrent elements.

  • Schedule as-needed circuit breaker maintenance, and send alarms when the breaker wear monitor detects excess breaker contact wear from the number of operations and magnitude of interrupted current.

  • Alarm for low voltage conditions on station battery.

  • Use SEL-5040 Power System Report Manager 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 SEL-5601 Analytic Assistant Software to display oscillograms and vector diagrams to analyze event reports.

  • Vertical panel-mount hardware package.

  • Horizontal panel-mount or rack-mount hardware package.

  • Liquid crystal display and operator pushbuttons (vertical package not available with LCD or operator pushbuttons).

  • Distributed Network Protocol (DNP) 3 Level 2 Slave communications protocol.

  • Connectorized®

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

    Learn more about conformal coating.

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

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

  • Connectorized tinyWhen access to the back of panels and cabinets is allowed, use a Connectorized® version of this relay for fast installation and testing.

Data Sheets

Guideform Specification

Instruction Manuals

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Schweitzer Engineering Laboratories, Inc.

2350 NE Hopkins Court
Pullman, WA 99163 - USA
Phone: +1.509.332.1890
Fax: +1.509.332.7990
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