Superseded Standard

IEEE C37.93-1987

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

Superseded.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.

Sponsor Committee
PE/PSRCC - Power System Relaying and Control
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Status
Superseded Standard
Superseded by
C37.93-2004
Board Approval
1987-09-10
History
ANSI Approved:
1987-11-04
Published:
1987-12-28
Reaffirmed:
1999-09-16

Working Group Details

Society
IEEE Power and Energy Society
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Sponsor Committee
PE/PSRCC - Power System Relaying and Control
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No Active Projects
No Active Standards
No Superseded Standards
No Inactive-Withdrawn Standards
No Inactive-Reserved Standards
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