# Relay Performance During Stable Power Swings Reliability Standard
> **Federal Energy Regulatory Commission** · Final rule. · Published 2016-03-24 · Effective 2016-05-23 · 81 FR 15635
## Document
- **Document number:** 2016-06508
- **Category:** electric-grid
- **Sub-agency:** Federal Energy Regulatory Commission
- **Federal Register citation:** 81 FR 15635
- **CFR reference:** 18 CFR 40
- **Publication date:** 2016-03-24
- **Effective date:** 2016-05-23
- **Energy docket:** Docket No. RM15-8-000
## Abstract

The Federal Energy Regulatory Commission approves Reliability Standard PRC-026-1 (Relay Performance During Stable Power Swings), submitted by the North American Electric Reliability Corporation. Reliability Standard PRC-026-1 is designed to ensure that applicable entities use protective relay systems that can differentiate between faults and stable power swings.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/03/24/2016-06508/relay-performance-during-stable-power-swings-reliability-standard)
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