Protect Small and Large Busbars With the SEL-487B Bus Differential and Breaker Failure Relay

SEL makes process bus solutions easier and more cost-effective to design and deploy.

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With its optional five-port Ethernet card, you can now use the SEL-487B-2 Bus Differential and Breaker Failure Relay With Sampled Values or TiDL Technology to provide distributed protection for busbars with a phase-segregated differential scheme.

When three relays are used in a phase-segregated scheme, each can subscribe to as many as 24 IEC 61850 Sampled Values streams (21 for currents and 3 for voltages) to provide protection for large busbars with up to 21 terminals.

The SEL-487B provides bus current differential protection, circuit breaker failure protection, and backup overcurrent protection. Standardizing on the SEL-487B simplifies configuration and gives you the ability to apply the SEL-487B for small or large busbars, making busbar protection easier to configure in IEC 61850 Sampled Values systems. This solution significantly improves safety, reliability, and cost efficiency.

Scalable Solutions for Modern Substations

The IEC 61850 standard provides a framework for designing digitized substation systems that are vendor-agnostic and flexible in application. Process bus and station bus solutions based on IEC 61850 protocols replace copper wiring with digital communications, allowing you to:

  • Increase operational flexibility and take full advantage of the data provided by modern IEDs.
  • Improve safety by removing high-energy wiring from the control house.
  • Reduce construction and maintenance costs.

Sampled Values-based process bus solutions from SEL utilize intelligent merging units with built-in protective functions, advanced monitoring capabilities, and the IEC 61850 standard to maximize application flexibility and interoperability. With our ACSELERATOR Architect SEL-5032 Software, included with SEL products, you can easily edit the IEC 61850 server model for SEL devices, making process bus systems easier to design and deploy.

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