Transcription of PRC-027-1 — Coordination of Protection Systems for ...
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PRC-027-1 — Coordination of Protection Systems for ...
PRC-027-1 Coordination of Protection Systems for Performance During Faults A. Introduction 1. Title: Coordination of Protection Systems for Performance During Faults 2. Number: PRC-027-1 . 3. Purpose: To maintain the Coordination of Protection Systems installed to detect and isolate Faults on Bulk Electric System (BES) Elements, such that those Protection Systems operate in the intended sequence during Faults. 4. Applicability: Functional Entities: Transmission Owner Generator Owner Distribution Provider (that owns Protection Systems identified in the Facilities section below). Facilities: Protection Systems installed to detect and isolate Faults on BES. Elements. 5. Effective Date: See the Implementation Plan for PRC-027-1 , Project 2007-06 System Protection Coordination . B. Requirements and Measures R1. Each Transmission Owner, Generator Owner, and Distribution Provider shall establish a process for developing new and revised Protection System settings for BES Elements, such that the Protection Systems operate in the intended sequence during Faults.
50 – Instantaneous overcurrent . 51 – AC inverse time overcurrent . 67 – AC directional overcurrent if used in a non -communication-aided protection scheme . Notes: 1. The above Protection System functions utilize current in their measurement to initiate tripping of circuit breakers. Changes in
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