# Reliability Standards for Frequency and Voltage Protection Settings and Ride-Through for Inverter-Based Resources
> **Federal Energy Regulatory Commission** · Final rule. · Published 2025-07-29 · Effective 2025-08-28 · 90 FR 35599
## Document
- **Document number:** 2025-14304
- **Category:** electric-grid
- **Sub-agency:** Federal Energy Regulatory Commission
- **Federal Register citation:** 90 FR 35599
- **CFR reference:** 18 CFR 40
- **Publication date:** 2025-07-29
- **Effective date:** 2025-08-28
- **Energy docket:** Docket No. RM25-3-000
## Abstract

The Federal Energy Regulatory Commission (Commission) approves proposed Reliability Standard PRC-024-4 (Frequency and Voltage Protection Settings for Synchronous Generators, Type 1 and Type 2 Wind Resources, and Synchronous Condensers), Reliability Standard PRC-029-1 (Frequency and Voltage Ride-through Requirements for Inverter-Based Resources), and a definition of "Ride-through," which the North American Electric Reliability Corporation (NERC) submitted in response to a Commission directive. In addition, the Commission directs NERC to clarify documentation requirements for legacy equipment needed to support an exemption request pursuant to Reliability Standard PRC-029- 1; to consider whether, and if so how, to address a total of two exception- and exemption-related issues raised by commenters; and to submit an informational filing that assesses the reliability impact of the exemptions to Reliability Standard PRC-029-1.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/07/29/2025-14304/reliability-standards-for-frequency-and-voltage-protection-settings-and-ride-through-for)
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