22-1952 - AIEE Standard for Air Switches, Insulator Units, and Bus Supports (Supersedes AIEE No 22- 1942 and 22A- 1949).pdf
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1、 No. 22 July 1952 Standard for AIR SWITCHES, INSULATOR UNITS, and BUS SUPPORTS (Effective July 31, 1952) (Supercedes AIEE No. 221942 and 22A1949) Published by AMERICAN INSTITUTE OF ELECTRICAL ENGINEERS 33 West Thirty-ninth Street, New York 18, N. Y. Development of the Standards of the American Insti
2、tute of Electrical Engineers Recognizing the importance in the development of electrical engineering, of standardiza tion in the electrical field, the AIEE in 1898 appointed a Committee on Standardization, consisting of seven members having qualifications and experience from designing, manufac turin
3、g and operating standpoints. The report of this Committee was accepted at a meeting of the Institute in June 1899. Experience gained in appHcations of the standards and further developments in electric apparatus and methods showed the necessity of revision, and a committee was appointed which after
4、consultation with manufacturing and operating engineers presented the first revised report on Standardization Rules of the AIEE in June 1902. The next revision was undertaken by a committee of ten, which presented its report in May 1906. In September 1906, a Standards Committee of eleven members was
5、 appointed for further revision, and its report was presented in June 1907. The appreciation of the importance and value of standardization resulted in the forma tion of a Standing Committee, with the title of Standards Committee of the AIEE. This became effective in the Constitution of June 1907. T
6、he scope and amount of work necessitated increasing the number of members from time to time until in 1922 there were 37 members divided into a number of subcommittees specializing on various subjects. AIEE Standards published in a single volume as each revision was adopted were generally accepted as
7、 standards of the electrical industry of the United States since the adoption of the first report in 1899. Subsequent reports on standards were made and pub lished, in some cases in several editions. The dates of adoption by the Board of Directors of such reports are as follows: June 20, 1902; June
8、21, 1907; June 27, 1912; July 10, 1914; June 30, 1915; June 28, 1916; November 8, 1918; October 8, 1920, and June 29, 1922. On June 29, 1922, in view of the increasing complexity of the work, a reorganization of the Standards Committee was effected, and a working organization established which pro v
9、ided for an increase in standardization work and for the appointment on Working Commit tees of the Standards Committee of non-Institute members. The present plan under which the Institute Standards are being issued involves the sepa ration of the complete body of standards into more than forty secti
10、ons, each published as a separate pamphlet and dealing with a specific subject. Each section of the standards has been formulated either by a subcommittee of the Standards Committee which was made as rep resentative as possible for the work in hand, by an AIEE Technical Committee or subcom mittee, o
11、r by a Sectional Committee organized according to the procedure of the American Standards Association. The division of the standards into a number of separate publications simplifies the process of keeping the standards revised to conform with the latest develop ment and enables those interested in
12、a particular field to obtain in concise form the material relating to that field. In framing the Institute Standards the chief purpose has been to define terms and conditions which characterize the rating and behavior of electric machinery and apparatus, with special reference to the conditions of a
13、cceptance tests. The AIEE Standards Committee takes this occasion to draw attention to the value of suggestions based upon experience gained in the application of the standards to general practice. Any suggestions looking toward improvements in the standards will be welcomed for the guidance of the
14、Committee in preparation of future editions, and should be communicated to the Secretary of the AIEE Standards Committee, 33 West 39th Street, New York 18, N. Y. TABLE OF CONTENTS Scope 5 Service Conditions S Definitions 6 GeneralProperties and Characteristics 6 Classification 7 Construction Arrange
15、ments and Parts 7 Classes of Operation 9 Rating 10 Classification of Insulation Materials 11 Tests 2 General 1Temperature Rise Tests 13 Interrupting Tests on Air Interrupter Switches 13 Nameplate Markings 14 Appendix A Recommended Methods for Determining the Rms Value of a Sinusoidal Current Wave 15
16、 Appendix Simplified Calculation of Fault Currents 19 INTRODUCTION The AIEE standards on certain related devices have been grouped into this one standard. This saves duplication and serves to set off important differences when they exist. Essential data from Reports and Standards of AIEE, as well as
17、 definitions from the American Standard Definitions of Electrical Terms, C42 have been incorporated for ready reference. These terms are fol lowed by their C42 designating number in parentheses. Specific defini tions have also been included. If there is need for further clarification, reference shou
18、ld be made to the following: AIEE Standards Manual AIEE 1 Introduction to AIEE Standards General Principles Upon Which Temperature Limits are Based in The Rating of Electric Machines and Apparatus. AIEE IB Report on Guiding Principles for the Specification of Service Conditions in Electrical Standar
19、ds. AIEE 3 Guiding Principles for the Selection of Reference Values for Electrical Standards. AIEE 4 Measurement of Test Voltage in Dielectric Tests. AIEE 29 Wet Tests ASA C29.1 - Insulator Tests ASA C42 Definitions of Electrical Terms EEI-NEMA Report on Preferred Voltage Ratings There are other com
20、mittees of the AIEE working on various reports and standardization problems such as impulse ratings, simplified calcu lation of short-circuit currents, definitions, etc. When they are_ com pleted and approved some changes in this standard may be advisable. ACKNOWLEDGMENT The Institute wishes to ackn
21、owledge its indebtedness to those who have so freely given their time and knowledge, and have conducted experimental work on which many of the AIEE Standards are based. The work of preparing this standard was carried out by members of the Subcommittee on Switches, Fuses and Insulators of the AIEE Co
22、mmittee on Switchgear. The members of the subcommittee are: K. J. Falck, Chairman R. H. Amundson T. E. Curtis H. W. Graybill G. L. Hill J. B. Owens A. H. Powell J. C. Woods C. P. Zimmerman Standard of the American Institute of Electrical Engineers AIR SWITCHES, INSULATOR UNITS, AND BUS SUPPORTS SCOP
23、E This standard applies to the following types of devices designed for operation above 600 volts whether for indoor or outdoor service. (a) Air switches such as disconnecting, grounding, etc., for manual or automatic oper ation. (See 22-73, 75 and 79) (b) Air interrupter switches. (See 22-79.3) (c)
24、Insulator units and bus supports. (See 22-119 and 71) SERVICE CONDITIONS 22-1 Usual Temperature and Altitude Service Condi tionsEquipment conforming to this standard shall be suitable for operation at its standard rating, provided that: (a) The temperature of the cooling air (am bient temperature) d
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