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IEEE C37.93-2004

Current Revision

IEEE Guide for Power System Protective Relay Applications of Audio Tones over Telephone Channels

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Revision Standard - Inactive-Reserved. This document provides guidelines for applying audio tones over voice grade channels for power system relaying. Included are sections on transmitting and receiving equipment, leased voice grade channels, application principles, installation, and testing. The primary purpose of this document is to guide the power system user in applying, installing, and operating audio-tone protective relaying systems over voice grade channels. Secondly, it is to provide a reference for equipment manufacturers engaged in the design and application of relaying equipment and for telephone personnel engaged in providing telecommunications channels for audio-tone protective relay schemes.
Review and revise the existing standard to incorporate current industry practice and technology.
Since this document's last reaffirmation, many changes have occurred in the telecommunications industry. The purpose of this project is to bring this guide up to date with the current technology.

SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number C37.93
Publication Date Aug. 23, 2004
Language en - English
Page Count 49
Revision Level
Supercedes
Committee Power System Communications and Cybersecurity
Publish Date Document Id Type View
Aug. 23, 2004 C37.93-2004 Revision
Dec. 28, 1987 C37.93-1987 Revision