IEEE C37.122.1-2002 pdf download IEEE Guide for Gas-Insulated Substations
1.Overview
This guide provides information of special relevance to the planning, design, testing, installation, operation.and maintenance of gas-insulated substations (GIS) and equipment. This guide is intended to supplementIEEE Std C37.122-1993.
In general, this guide is applicable to all ac GIS from 72.5-800 kV However, the importance of the topicscovered varies with circumstances. For example, issues related to advanced field test techniques and very fasttransients (VFT) are of particular interest for extra-high-voltage (EHV) GIS (345 kV and above), and are oflesser importance at lower voltage levels.
2. References
This guide shall be used in conjunction with the following references.
AA ACM 1-1986 The Aluminum Construction Manual.2
AISC S335-89, Specifications for Design, Fabrication, and Erection of Structural Steel for Buildings.ANSI/ASME 1992 Boiler and Pressure Vessel Code–Section VIll: Pressure Vessels, Division 1.4
IEC Draft 17A-339 (SECRETARIAT) (IEC Draft 17C-102 (SECRETARIAT)], Electromagnetic Compati-bility (EMC) for Secondary Systems in Gas-Insulated Metal-Enclosed Switchgear for Rated Voltages of72.5 kV and Above.
IEC68-1 (1988),Environmental Testing–Part 1: General and guidance.
IEC68-2-6(1982),Test Fc and guidance: Vibration (sinusoidal).
IEEE Std C37.98-1987 (Reaff 1991), IEEE Standard for Seismic Testing of Relays (ANSI).
IEEE Std C37.122-1993,IEEE Standard for Gas-Insulated Substations.
IEEE Std 1125-1993,IEEE Guide for Moisture Measurements and Control in S Gas-Insulated Equipment.
NEMA CC 1-1993,Electric Power Connectors Substations
Uniform Building CodeTM,1991 ed, and 1993 Accumulative Supplement, International Conference of BuildingOfficials (ICBO).
Additional references on gas-insulated substations may be found in the bibliography in clause 5
3.Definitions
The following definitions are applicable only to the subject treated in this guide. At the time this guide was approvedthere were no corresponding definitions in IEEE Std 100-1992 .
3.1 acting stress (working stress): The maximum applied or expected mechanical stress in a material duringoperation of the apparatus of which it is a part and including the stresses caused by seismic and other loading, actingindependently or simultaneously as determined by the user.
3.2 allowable stress: The maximum stress permitted by applicable standards or codes, or both3.3 amplification (mechanical): The relationship between response acceleration and ground acceleration
3.4 assembly (GIS): A collection of GlS components that are interconnected and ready for insertion as a subassemblyin a GIS, such as a breaker bay shipping assembly. The term is also used to describe a complete GIS.
3.5 auxiliary circuits: All control, indicating, and measuring circuits.
3.6 Class A seismic component: A component or system whose failure, malfunction, or need for repair prevents theproper operation of the gas-insulated substation during or after the design earthquake.
3.7 Class B seismic component: A component or system whose failure, malfunction, or need for repair does notprevent the proper operation of the gas-insulated substation during or after the design earthquake. Class B componentsare designed to mect cither normal building codes and national standards in force at the site or another lower-leveldesign earthquake. Application of further design requirements is left to the discretion of the user.
3.8 compartment (GIS): Any gas section of the gas-insulated substation assembly that provides gas isolation.3.9 continuous enclosure: A bus enclosure in which the consecutive sections of the enclosure are clectrically bondedtogether to provide a continuous current path through the entire enclosure length.
3.10 continuous monitoring: The process of sampling the state of some phenomenon at a time interval shorter thanthe time constant of the phenomenon.
3.11 damping (mechanical): A dynamic property that indicates the ability of a structure to dissipate energyNOTE — The phenomenon of damping is represented by the damping ratio, a percentage of critical damping. After being forcedto deflect and allowed to vibrae freely, structures with zero damping vibrate indefinitely, Structures with criticaldamping return to their static or neutral position in the shortest time without oscillation.
3.12 design earthquake: The greatest earthquake postulated during the life of the gas-insulated substation that theuser wishes the gas-insulated substation to survive in operating condition.
3.13 design pressure (working pressure): The maximum steady-state gas pressure to which a gas-insulatedsubstation enclosure is subjected under normal operating conditions..14 enclosure currents: Currents that result from the voltages induced in the metallic enclosure by effects of currentsflowing in the enclosed conductors
3.15 gas barrier insulator: A spacer insulator specifically designed to prevent passage of gas from one gascompartment to another.
IEEE C37.122.1-2002 pdf download
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