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Secure Protective Relaying

Prescient has made great strides in our efforts to improve the performance of protective relaying schemes.

Description of Services

Using our proprietary, industry-leading method of analyzing protective relay schemes, we will evaluate client’s systems to determine their efficacy. We have examined significant events around the globe, and will recommend actions to prevent similar occurrences in the future.


  • Assessment of the security of client’s protective relaying schemes.

  • Assessment of the dependability of client’s protective relaying schemes.

  • Cost effective enhancements to simultaneously increase security and dependability.

  • Methods to prevent harmful significant events at specific utilities in the future.

Why Use Our Services?

Traditional protective relay applications are designed to race to the finish.  The first protective relay that issues a trip command opens the circuit breaker, which clears a short circuit. Two protective relays are applied for protection of each transmission system element. There are several concerning aspects to this traditional approach.

The first concern is failure to trip. This concern is resolved by installing two protective relaying schemes. The second concern, inadvertent tripping, remains an issue.  Prescient’s approach to eliminating inadvertent tripping is to recommend the utilization of voting logic in protective relaying schemes. With microprocessor-based protective relays, voting logic is achievable because each protective relay receives all the voltage and current inputs needed to create inputs to logic tables.

Contact us to learn more.

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