When FERC issued Order 733, approving PRC-023-1 — Transmission Relay Loadability, it directed several changes to that standard and also directed development of one or more new standards within specified time periods. NERC filed for clarification and rehearing asking for clarity and an extension of time to address the directives, however without a response to the requests for clarification and rehearing, NERC must adhere to the deadlines established in Order 733.

 

The SAR for Project 2010-13 – Relay Loadability Order subdivides the standard development related directives into three phases. Phase I addresses the specific directives from Order 733 that identified required modifications to various elements within PRC-023-1. Phase II addresses directives associated with development of a new standard to address generator relay loadabilty. Phase III addresses directives associated with writing requirements to address protective relay operations due to power swings.