BS G 235-1987 Specification for electric cables for general airframe or equipment interconnect use (150 C) wrapped insulation with silver plated conductors《一般机体或设备连接用镀银导体的150℃捆扎绝缘电.pdf
《BS G 235-1987 Specification for electric cables for general airframe or equipment interconnect use (150 C) wrapped insulation with silver plated conductors《一般机体或设备连接用镀银导体的150℃捆扎绝缘电.pdf》由会员分享,可在线阅读,更多相关《BS G 235-1987 Specification for electric cables for general airframe or equipment interconnect use (150 C) wrapped insulation with silver plated conductors《一般机体或设备连接用镀银导体的150℃捆扎绝缘电.pdf(22页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD AEROSPACE SERIES BS G235:1987 Specification for Electric cables for general airframe or equipment interconnect use(150 C), wrapped insulation with silver plated conductors UDC 629.7.064.5:621.315.33-408.4BSG235:1987 This BritishStandard, having been prepared under the directionof th
2、e Aerospace Standards Committee, was published under the authority ofthe Board of BSI and comesintoeffect on 30September1987 BSI01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/6 Draft for comment85/71992 DC ISBN 0 580 15921 3 Committees responsible f
3、or this BritishStandard The preparation of this BritishStandard was entrusted by the Aerospace Standards Committee (ACE/-) to Technical Committee ACE/6, upon which the following bodies were represented: BEAMA Ltd. British Airways British Rubber Manufacturers Association Civil Aviation Authority Elec
4、tric Cable Makers Confederation Electronic Components Industry Federation Ministry of Defence National Supervising Inspectorate Society of British Aerospace Companies Limited Amendments issued since publication Amd. No. Date of issue CommentsBSG235:1987 BSI 01-2000 i Contents Page Committees respons
5、ible Inside front cover Foreword ii 1 Scope 1 2 Classification 1 3 Construction 1 4 Designation and marking 2 5 Packaging and labelling 2 6 Tests 2 7 Reference samples 6 Figure 1 Variation of resistance of copper with temperature 16 Table 1 Type01, class1: single-core unscreened interconnect cables(
6、150 C) 6 Table 2 Type02, class1: single-core unscreened airframe cables(150 C) 7 Table 3 Type01, classes2,3 and4: multi-core unscreened, twisted interconnect cables without jacket(150 C) 7 Table 4 Type02, classes2,3 and4: multi-core unscreened, twisted airframe cables without jacket(150 C) 8 Table 5
7、 Type03, classes2,3 and4: multi-core unscreened, twisted interconnect cables with jacket(150 C) 8 Table 6 Type04, classes2,3 and4: multi-core unscreened, twisted airframe cables with jacket(150 C) 8 Table 7 Type05, classes1,2,3 and4: single-core screened with jacket, and multi-core twisted and scree
8、ned with jacket, interconnect cables(150 C) 9 Table 8 Type06, classes1,2,3 and4: single-core screened with jacket, and multi-core twisted and screened with jacket, airframe cables(150 C) 10 Table 9 Test application 11 Table 10 Specific test parameters 13 Table 11 Current ratings in amperes for gener
9、al purpose150 C airframe cable 15 Publications referred to Inside back coverBSG235:1987 ii BSI 01-2000 Foreword This BritishStandard, having been prepared under the direction of the Aerospace Standards Committee, specifies requirements for a range of lightweight thin-wall insulated cables that are i
10、ndividually suitable for general airframe or equipment interconnect use. The dielectric insulation material is spirally lapped with an overall coating to provide the necessary colour coding and to provide a base for printed identification legends. The standard requires the application of the dielect
11、ric material so as to provide the minimum penalties of weight and space whilst offering reliable performance over a full airframe life of not less than50000h. Cables manufactured to this standard are not required to meet the fire resistance requirements of BS3G100:Subsection 3.13 but they are requir
12、ed to satisfy the flammability requirements of BS G230. Attention is drawn to BS G230 which specifies the general requirements for aircraft electric cables (second series). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respo
13、nsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to16, an inside back cover and a back cover. This standard has been
14、updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BSG235:1987 BSI 01-2000 1 1 Scope This BritishStandard specifies construction and performance requirements for a range of lightweight cables with wrapped ins
15、ulation and silver plated conductors suitable for general airframe use in the size range26 to0000, and for equipment interconnect in the size range26 to18. The following types of cable are specified: The cables are suitable for continuous use where the maximum stabilized conductor temperature does n
16、ot exceed150 C. They are suitable for applications involving flexing at temperatures down to65 C. The cables are suitable for use where the potential between conductors or between a conductor and screen, or the aircraft structure does not exceed600V r.m.s. and the frequency does not exceed2000Hz. In
17、terconnect cables are suitable for use in areas with some physical protection, such as behind panels or bulkheads, They also have an application for the internal wiring of equipment. Airframe cables are of sufficiently robust construction to be used for open aircraft wiring. The short-term and long
18、term current ratings for the cables are specified in this standard. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Classification Cables are classified according to the number of cores as follows: 3 Construction 3.1 General The materials and me
19、thod of construction used for the formation of the cables shall be defined and controlled to the satisfaction of the Approving Authority 1) . No change shall be made to such materials or processes unless it can be shown to the satisfaction of the Approving Authority that the performance and handling
20、 properties of the cable have not been degraded. The cable shall be made of materials such that the performance requirements of this standard are satisfied. 3.2 Conductors 3.2.1 Conductors shall comply with BS G231 before fabricating into completed cables. 3.2.2 Copper strands and copper alloy stran
21、ds shall be silver plated. 3.3 Insulation The insulation for interconnect cables shall consist of one or more overlapped tapes of insulating material, and for airframe cables, two or more overlapped tapes. An overall coating may also be provided which, for the purposes of this standard, shall be reg
22、arded as part of the cable. The insulating material shall be such that the performance requirements of this standard are satisfied. Only100% new materials that have been through only those processes essential to their manufacture and application shall be used. Type01 interconnect Single-core or twis
23、ted multi-cores only Type02 airframe Type03 interconnect Two or more cores, with anouter jacket Type04 airframe Type05 interconnect Single- or multi-core, with a screen and outer jacket Type06 airframe class1: single core class2: two core class3: three core class4: four core 1) The Approving Authori
24、ty is either: a) for UK Civil Aviation products, the Civil Aviation Authority (or their accredited representatives); or b) for UK military products, information is available from the Procurement Executive, Ministry of Defence, Directorate General of Defence Quality Assurance, Directorate of Standard
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