SEL
SEL-487V

SEL-487V Capacitor Protection and Control System

Ordering Information

Budgetary Price:
$4,200

Fully Optioned Price:
$8,725

Online Product Configuration

Simplify relay setting and application while reducing inventory by using one relay for all of your capacitor bank needs. The versatile SEL-487V Relay can handle grounded and ungrounded, single, and double-wye capacitor bank applications. It provides sensitive voltage differential and current unbalance protection with compensation adjustment for small voltage differential levels due to variations in individual capacitor elements from manufacturing, potential transformer, or instrument transformer measurement error. Application-based settings simplify setup and installation while fault-finding logic locates faulty capacitor units to speed necessary maintenance. Synchrophasor technology provides situational awareness and real-time control.

  • Achieve Complete Capacitor Bank Protection and Control With One Relay 

    Protect and control grounded and ungrounded, single- and double-wye capacitor bank applications with a single relay. The SEL-487V includes both voltage differential and overcurrent elements for complete protection.

  • Provide Flexible Multibank Protection and Control 

    Provide sensitive capacitor failure detection with application-based settings that provide voltage and current unbalance elements. Select from voltage, power factor, VAR, or time-of-day/day-of-week control schemes. Prevent equipment damage to capacitor banks and switching apparatus using control instability (hunting) detection.

  • Simplify Settings Calculations 

    Automatically perform calculations for application-based settings using IEEE C37.99 specification settings assistant software.

  • Improve Power System Reliability and Stability With Built-In Synchrophasor Measurement System 

    Obtain real-time measurements of electrical quantities. Provide local control based on wide-area measurements.

  • Save Time Identifying Faults 

    Find faulty capacitor units using the patent pending advanced faulted phase and section identification logic.

  • Measure voltage differences between bus or line phase voltages and the tapped voltage of the grounded wye capacitor bank using three-phase voltage differential elements. The phase differential elements detect variations in capacitor bank impedance due to loss of individual capacitor elements, a single capacitor unit, or an entire group of capacitor units. 
  • Protect up to three ungrounded wye capacitor banks with neutral voltage differential elements. Three neutral voltage differential elements calculate zero-sequence voltage from the three-phase potential inputs provided from the line or bus and compare this voltage to the zero-sequence voltage measured by a potential transformer connected between the capacitor bank neutral and ground.
  • Provide protection for up to three ungrounded, double-wye capacitor banks with neutral current unbalance elements.  
  • Use phase current unbalance detection to protect both grounded and ungrounded double-wye capacitor bank applications. The three-phase phase current unbalance elements use the A-phase system voltage as a reference to enhance sensitivity and provide a directional indication.
  • Apply automatic unbalance compensation for all protection methods.
  • Simplify the process of configuring the SEL-487V using the new Graphical Logic Editor (GLE) in acSELerator QuickSet® SEL-5030 Software . The GLE allows you to view your SELogic equations graphically so your settings files can be documented for easier validation and commissioning.  Convert existing SELogic control equations to easy-to-read diagrams and save diagrams with your QuickSet settings.
  • Use SEL-5601 Analytic Assistant Software to display oscillograms and vector diagrams to analyze event reports.
  • 4U or 5U chassis for one or two additional I/O boards.
  • Horizontal or vertical, panel or rack mount.
  • Additional inputs/outputs (settable level-sensitive or optoisolated).
  • Automatic voltage control (VAR, PF, time-of-day).
  • VSSI (voltage sag, swell, and interruption) reporting.
  • Ethernet communications.
  • IEC 61850 communications.
  •  Conformal coating.
  •  Connectorized.® 
  • Auxilliary breaker control pushbuttons.

 SEL University Training

APP 487V: SEL-487V Capacitor Protection and Control System

This two-day course provides hands-on application and settings guidance for the SEL-487V capacitor protection relay.

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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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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