This guide covers three-phase unit substations for step-down operation in the range of 112.5 kVA or greater at primary voltages of 601 V through 38 kV. This guide does not cover the following installations: a) Substations in which the transformer section is described and defined as "network," "subway," "vault," or "underground" in IEEE Std C57.12.24 and IEEE Std C57.12.40. b) Substations in which the transformer section is described and defined as "pad-mounted" in ANSI C57.12.22 and IEEE Std C57… read more .12.27. c) Gas-insulated substations as described in IEEE Std C37.122. d) Rectifier-type substations. e) Mobile unit substations. f) Installations in ships, watercraft, railway rolling stock, aircraft, or automotive vehicles. g) Installations for mines. h) Installations of railways for generation, transformation, transmission, or distribution of power used exclusively for operation of rolling stock, or for installations used exclusively for signaling and railway communication purposes. i) Installations of communication equipment that is under the exclusive control of communication utilities, located outdoors or in building spaces used exclusively for such installations. j) Installations under the exclusive control of electric utilities for the purpose of communication, or metering; or for the generation, control, transformation, transmission, and distribution of electric energy located in buildings used exclusively by utilities for such purposes or located outdoors on property owned or leased by the utility or on public highways, streets, roads, etc; or outdoors by established rights on private property. read less

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This guide covers three-phase unit substations for step-down operation in the range of 112.5 kVA or greater at primary voltages of 601 V through 52 kV. This guide does not cover the following installations: a) Substations in which the transformer section is described and defined as "network," "subway," "vault," or "underground" in IEEE Std C57.12.24 [B13] and IEEE Std C57.12.40 [B15]2 b) Substations in which the transformer section is described and defined as "pad-mounted" c) Rectifier-type substations d) Mobile unit substations e) Installations in ships, watercraft, railway rolling stock, aircraft, or automotive vehicles f) Installations for mines g) Installations of railways for generation, transformation, transmission, or distribution of power used exclusively for operation of rolling stock, or for installations used exclusively for signaling and railway communication purposes h) Installations of communication equipment that is under the exclusive control of communication utilities, located outdoors or in building spaces used exclusively for such installations i) Installations under the exclusive control of electric utilities for the purpose of communication, or metering; or for the generation, control, transformation, transmission, and distribution of electric energy located in buildings used exclusively by utilities for such purposes or located outdoors on property owned or leased by the utility or on public highways, streets, roads, etc.; or outdoors by established rights on private property

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Define a standard for the communications interface between the telephone network and the device at the customer premise. The device at the customer premise is identified as a Telemetry Interface Unit (TIU) and may provide an interface between the network and devices at the customer premise such as utility meters, alarm devices, control switches and other devices to be determined.

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This document standardizes terminology and indexes for reporting electric generating unit reliability, availability, and productivity performance measures that recognize the power industry’s needs, including marketplace competition. This standard also includes consideration of VER units and Resource unavailability, and new indexes appropriate for that purpose. This document does not address common mode or dependent outages.

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This standard defines an exchange format, utilizing Extensible Markup Language (XML), for both the static description of a UUT and the specific description of UUT instance information.

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Since rotating electrical machines convert mechanical energy to electrical energy, or electrical energy to mechanical energy, base values for each kind of energy appear desirable in formulating a per-unit system. However, the relationship between these energies involves power factor and efficiency, which are not fundamental quantities and which vary considerably between different designs. Traditionally, designers of generators considered rated apparent output power as base power, and designers… read more of synchronous motors considered rated apparent input power as base power. Designers of synchronous motors used rated apparent input power as the base even though it was necessary to estimate efficiency. This permitted the use of the same design equations for both synchronous generators and synchronous motors. Designers of induction motors generally have used rated output power as base apparent power, eliminating assumptions of power factor and efficiency. This was particularly desirable when working with small machines or machines with many poles, where accurate estimates of power factor and efficiency were difficult to make. However, some induction machines are used as induction generators, so that the definitions of input power and output power depend on the mode of operation. read less

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This standard specifies a communication layer, Flexible Optical Service Unit (OSUFlex), to provide small service channels in optical transport networks. The main features of the OSUFlex communication layer are providing massive OSUflex connections to directly carry power services (e.g., E1 or IEEE Std C37.94) into the optical transport network, enabling the flexible bandwidth (e.g., n ×2 Mbit/s) and hitless bandwidth adjustment for each OSUflex connection, directly mapping of service into… read more OSUflex with the capabilities of high bandwidth efficiency, low latency, low latency jitter, and high-precision clock synchronization for power system applications. read less

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