NERC PRC-026 Reliability Standard

The NERC PRC-026 Reliability Standard is a mandatory set of requirements intended to ensure that load-responsive protective relays associated with Bulk Electric Power System (BES) elements do not trip in response to stable power swings during non-fault conditions. The process of PRC-026 compliance requires comprehensive review of distance and overcurrent-based protection device settings and evaluation against a set of criteria calculated from system conditions and configuration.