BS-7732-1994 IEC-60652-1979.pdf
《BS-7732-1994 IEC-60652-1979.pdf》由会员分享,可在线阅读,更多相关《BS-7732-1994 IEC-60652-1979.pdf(8页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS 7732:1994 IEC 652:1979 Guide to Loading tests on overhead line towers UDC 621.315.66.001.4.001.2 620.17 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:30:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7732:1994 This British Standard, ha
2、ving been prepared under the direction of the Power Electrical Engineering Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 February 1994 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference
3、PEL/17 Draft for comment 86/21384 DC ISBN 0 580 22827 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Power Electrical Engineering Standards Policy Committee (PEL/-) to Technical Committee PEL/17, upon which the following bodies were r
4、epresented: Aluminium Federation Association of Consulting Engineers BECCAMA (BEAMA Electrical Cable Conductor Accessory Manufacturers Association British Non Ferrous Metals Federation British Railways Board Department of Trade and Industry (Electricity Division) Electrical and Electronic Insulation
5、 Association (BEAMA Ltd.) Electricity Association Overhead Transmission Line Contractors (BEAMA Ltd.) Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:30:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
6、7732:1994 BSI 09-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Object1 3General test criteria1 4Load application1 5Sequence of test loading cases2 6Check of tower mechanical strength2 7Procedure in the event of premature collapse2 8Check of quality of mate
7、rials used for prototype test2 9Presentation of test results3 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:30:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7732:1994 ii BSI 09-1999 National foreword This British Standard has been prepared under the dire
8、ction of the Power Electrical Engineering Standards Policy Committee. It is identical with IEC 652:1979 Loading tests on overhead line towers published by the International Electrotechnical Commission (IEC). This British Standard was approved for publication in November 1993 as a guide to what shoul
9、d be considered in testing overhead line towers. The graphic signs, symbols and letters used in this standard may be found in the following British Standards: BS 3939, Graphical symbols for electrical power, telecommunications and electronics diagrams; Part 1:1986 General information, general index
10、Part 2:1985 Symbol elements, qualifying symbols and other symbols having general application A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does no
11、t of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in th
12、e amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:30:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7732:1994 BSI 09-19991 1 Scope This standard is applicable to the testing of towers and structures of overhead lin
13、es for voltages above 45 kV. 2 Object The object of this standard is to codify the methods of testing towers and structures of overhead lines for voltages above 45 kV. These tests are made on the prototype prior to manufacture (prototype tests). Under certain conditions, these tests may also be made
14、 as acceptance tests on a batch of towers. 3 General test criteria 3.1 For a prototype test, the material used shall be made to the same standards as those that will apply to all towers during production. These standards will include bar size, bolt size, metal quality, connections, geometry and surf
15、ace coatings. 3.2 Responsibility for checking the conformity of the structure used for the prototype test with the corresponding production structures shall be decided before the test. 3.3 If an acceptance test on the entire tower is required, the components shall be chosen at random from the batch
16、offered for acceptance. 3.4 The test tower shall be erected on a rigid base. 3.5 The selected tower shall successfully withstand the loads specified for the various conditions stipulated by the relevant IEC standards or by the client of the testing station. 3.6 The client of the testing station is t
17、he organization, or its nominee, giving direct instructions to the testing station for the test to be undertaken. 4 Load application Loading cases (values, directions and points of application of loads) are given by the client. 4.1 Grouping of loads If, for practical purposes, some loads (i.e. due t
18、o wind on the structure) have to be grouped, the value of the resultant, its direction and its point of application shall be agreed by the client. 4.2 Application of loads in steps The test covers five steps of 50 %, 75 %, 90 %, 95 % and 100 % of the specified ultimate loads. A 25 % step may be sele
19、cted subject to the agreement of the client and the operator of the testing station. The 95 % step has been selected in order that readings may be taken just before the specified 100 % step which might not be reached. In this event, a result from the 95 % step would be useful for a decision on the r
20、eplacement of damaged components, as indicated in Clause 7. If the test station has facilities for continuous recording with simultaneous incremental application of all loads, this step could be omitted. 4.3 Dynamic effects Loads shall be applied in such a way as to avoid any dynamic effect. However
21、, bolt slips in the joints during the tower test, leading to possible dynamic stresses, shall be accepted. 4.4 Adjustment of loads per step For each step, except for the final 100 % step, the various loads shall be considered to be adjusted if the reading for each of them is within the following lim
22、its: The 100 % step is reached when the loads are equal to or greater than 100 % of the specified loads. As all loads approach 100 %, care shall be taken to avoid overloading of any point of application of these loads. 4.5 Duration of load application For each step, the time during which loads are a
23、pplied may be as short as possible: it will depend upon the facilities of the testing station, that is, upon the time necessary for the loads to be adjusted in accordance with the table in Sub-clause 4.4 and for the recording of the relevant values. For the final 100 % step, the loads shall be maint
24、ained for 1 min. The client may ask that, for the final 100 % step, loads be maintained for a longer period, with a maximum of 5 min; but should a failure occur during this period, the test shall be considered valid if the structure has held for at least 1 min. If the material employed for the struc
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BS-7732-1994 IEC-60652-1979 BS 7732 1994 IEC 60652 1979
链接地址:https://www.31doc.com/p-3737489.html