# Transmission Relay Loadability Reliability Standard
> **Federal Energy Regulatory Commission** · Final rule. · Published 2012-03-21 · Effective 2012-05-07 · 77 FR 16435
## Document
- **Document number:** 2012-6758
- **Category:** electric-grid
- **Sub-agency:** Federal Energy Regulatory Commission
- **Federal Register citation:** 77 FR 16435
- **CFR reference:** 18 CFR 39
- **Publication date:** 2012-03-21
- **Effective date:** 2012-05-07
- **Energy docket:** Docket No. RM11-16-000
## Abstract

Pursuant to section 215 of the Federal Power Act, the Commission approves Reliability Standard PRC-023-2 (Transmission Relay Loadability) submitted by the North American Electric Reliability Corporation (NERC), the Electric Reliability Organization certified by the Commission. The Reliability Standard requires transmission owners, generation owners, and distribution providers to set load-responsive phase protective relays according to specific criteria to ensure that the relays reliably detect--and protect the electric network from-- fault conditions, but do not limit transmission loadability or interfere with system operators' ability to protect system reliability. The Commission also approves NERC Rules of Procedure Section 1700-- Challenges to Determinations, which provides registered entities a means to challenge determinations made by planning coordinators under Reliability Standard PRC-023.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/03/21/2012-6758/transmission-relay-loadability-reliability-standard)
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