IEEE C37.93 1987
$30.88
IEEE Guide for Power System Protective Relay Applications of Audio Tones over Telephone Channels
| Published By | Publication Date | Number of Pages |
| IEEE | 1987 | 43 |
New IEEE Standard – Inactive – Superseded. Superseded. This guide contains information and recommendations for applying audio tones over telephone channels for power system relaying. Included are sections on transmitting and receiving equipment, leased telephone channels, application principles, installation, and testing. Reflected in this work is the knowledge and experience of equipment manufacturers and telephone companies as well as that of power utility users. This guide is not intended to supplant specific or general instructions contained in the manufacturers’ instruction books or in any contractual agreement between a manufacturer or telephone company(s) or both and a purchaser of a given relaying system. The illustrations in 5.7 are used for illustrative purposes only and do not represent the preferred protection under all conditions.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | Title Page |
| 3 | Introduction Participants |
| 5 | CONTENTS |
| 7 | 1. Scope and References 1.1 Scope 1.2 References |
| 8 | 2. Purpose 3. Transmitting and Receiving Equipment 3.1 Relaying Requirements |
| 9 | 3.2 Basic Types of Audio-Tone Systems 3.3 Power Supplies |
| 10 | 3.4 Equipment Protection fromSurge Phenomena 3.5 Noise Suppression Circuits or Devices |
| 11 | 3.6 Frequency Translation Protection |
| 12 | 4. Leased Telephone Channels 4.1 Introduction 4.2 Need for Joint Discussions |
| 13 | 4.3 Characteristics of Telephone Channels |
| 19 | 5. Application Principles 5.1 Audio-Tone Relaying Systems |
| 23 | 5.2 Mode of Operation |
| 24 | 5.3 Signal and Channel Arrangements |
| 30 | 5.4 Signal Transmission |
| 32 | 5.5 Operating Time of Relay Systems 5.6 Noise and Noise Suppression |
| 35 | 5.7 Telephone Channel and Terminal Equipment Protection |
| 39 | 6. Installation and Testing 6.1 Installation Considerations 6.2 Testing |
| 40 | 6.3 Periodic Maintenance |
| 41 | 7. Bibliography |
| 42 | Annex—Example of Audio-Tone Circuit Considerations |
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