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International Electrotechnical Commission, 05/01/2022
Publisher: IEC
File Format: PDF
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Published:01/05/2022
Pages:114
File Size:1 file , 1.3 MB
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This part of IEC 62271 applies to rigid HV gas-insulated transmission lines (GIL) in which the insulation is obtained, at least partly, by an insulating gas or gas mixture other than air at atmospheric pressure, for alternating current of rated voltages above 52 kV, and for service frequencies up to and including 60 Hz.
This document is applicable where the provisions of IEC 62271-203 do not cover the application of GIL (see Note 3).
At each end of the HV gas-insulated transmission line, a specific element is used for the connection between the HV gas-insulated transmission line and other equipment like bushings, power transformers or reactors, cable boxes, metal-enclosed surge arresters, voltage transformers or GIS, covered by their own specification.
Unless otherwise specified, the HV gas-insulated transmission line is designed to be used under normal service conditions.
NOTE 1 In this document, the term "HV gas-insulated transmission line" is abbreviated to "GIL".
NOTE 2 In this document, the word "gas" means gas or gas mixture, as defined by the manufacturer.
NOTE 3 Examples of GIL applications: - where all or part of the HV gas-insulated transmission line is directly buried; - where the HV gas-insulated transmission line is located, wholly or partly, in an area accessible to public; - where the HV gas-insulated transmission line is long (typically longer than 500 m) and the typical gas compartment length exceeds the common practice of GIS technology.
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