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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.

Protective relays --- Telephone communication channels --- Standards.

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This amendment specifies the extensions to IEEE Std 802.11® for Wireless Local Area Networks providing mechanisms for operation in the 4.9 GHz and 5 GHz bands in Japan. This amendment is based on IEEE Std 802.11™, 1999 Edition (Reaff 2003), as amended by IEEE Stds 802.11a™-1999, 802.11b™-1999, 802.11b-1999/Cor 1-2001, 802.11d™-2001, 802.11g™-2003, 802.11h™-2003, and 802.11i™-2004.

Local area networks (Computer networks) --- Metropolitan area networks (Computer networks) --- Standards.

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The basic requirements for qualifying Class 1E equipment and interfaces that are to be used in nuclear power generating stations are described in this standard. The principles, methods, and procedures described are intended to be used for qualifying equipment, maintaining and extending qualification, and updating qualification, as required, if the equipment is modified. The qualification requirements in this standard, when met, demonstrate and document the ability of equipment to perform safety function(s) under applicable service conditions including design basis events, reducing the risk of common-cause equipment failure.

Nuclear power plants --- Electric equipment --- Standards. --- Equipment and supplies

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Superseded by IEEE Std C95.1-2005 This Amendment will clarify the standard by specifically defining additional portions of the human body, e.g., the outer ear (pinna), as extremities subject to similar specific absorption rate (SAR) limits as extremities already defined, e.g., hands, feet, wrist and ankles.

Electromagnetic fields --- Radio waves --- Safety measures --- Standards.

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The basic requirements for qualifying Class 1E equipment and interfaces that are to be used in nuclear power generating stations are described in this standard. The principles, methods, and procedures described are intended to be used for qualifying equipment, maintaining and extending qualification, and updating qualification, as required, if the equipment is modified. The qualification requirements in this standard, when met, demonstrate and document the ability of equipment to perform safety function(s) under applicable service conditions including design basis events, reducing the risk of common-cause equipment failure.

Nuclear power plants --- Electric equipment --- Standards. --- Equipment and supplies