BS 787-1-1969 Specification for mining type flameproof gate-end boxes - Gate-end boxes for direct-on-line motor starting (for use on 3-phase a c circuits up to 650 V)《矿用式防爆电缆终端箱规范 .pdf
《BS 787-1-1969 Specification for mining type flameproof gate-end boxes - Gate-end boxes for direct-on-line motor starting (for use on 3-phase a c circuits up to 650 V)《矿用式防爆电缆终端箱规范 .pdf》由会员分享,可在线阅读,更多相关《BS 787-1-1969 Specification for mining type flameproof gate-end boxes - Gate-end boxes for direct-on-line motor starting (for use on 3-phase a c circuits up to 650 V)《矿用式防爆电缆终端箱规范 .pdf(22页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS787-1:1969 Specification for Mining type flameproof gate-end boxes Part1: Gate-end boxes for direct-on-line motor starting (for use on3-phase a.c. circuits up to650V)BS787-1:1969 This BritishStandard, having been approved by the Mining andQuarrying Requisites Industry Standards Co
2、mmittee,was published underthe authorityof the Executive Boardon 20March1969 BSI01-2000 First published February1938 First revision March1965 Second revision March1969 The following BSI references relate to the work on this standard: Committee reference MQE/16 Draft for approval68/20838 ISBN 0 580 0
3、5077 7 Co-operating organizations The Mining and Quarrying Requisites Industry Standards Committee, under whose supervision this BritishStandard was prepared, consists of representatives from the following Government department and scientific and industrial organizations: Association of Mining Elect
4、rical and Mechanical Engineers* British Electrical and Allied Manufacturers Association* British Steel Industry Federation of Associations of Mining Equipment Manufacturers Institution of Electrical Engineers Institution of Mechanical Engineers Institution of Mining Engineers Mechanical Handling Eng
5、ineers Association Ministry of Power* National Association of Colliery Managers National Coal Board* The Government department and industrial organizations marked with an asterisk in the above list were directly represented on the committee entrusted with the preparation of this BritishStandard. Ame
6、ndments issued since publication Amd. No. Date CommentsBS787-1:1969 BSI 01-2000 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Service conditions 2 4 Ratings 2 5 Marking 3 6 Design and construction 3 7 Tests 7 8 Information to be supplied to the
7、 manufacturer with the enquiry 8 Appendix A Metric values 9 Figure 1 Arrangement of busbar chamber end flange,terminals andinterconnections 10 Figure 2 Busbar interconnecting trunk 11 Figure 3 Skid coupling arrangement 12 Figure 4 Busbar end cover 13BS787-1:1969 ii BSI 01-2000 Foreword This standard
8、 makes reference to the following BritishStandards: BS88, Cartridge fuses of voltage ratings up to660 volts. BS159, Busbars and busbar connections. BS229, Flameproof enclosure of electrical apparatus. BS279, 100-ampere flameproof plugs and sockets (restrained type). BS542, Cable glands and sealing b
9、oxes for association with apparatus for use at mines. BS587, Motor starters and controllers. BS775, Contactors. BS1259, Intrinsically-safe electrical apparatus and circuits for use in explosive atmospheres. BS3101, Intrinsically-safe remote-control circuits associated with restrained plugs and socke
10、ts for use in coal mines. BS3454, 3.3kV300 A interchangeable bolted flameproof cable couplers and adaptors (including660V300 A adaptors) primarily for use in mines. This BritishStandard, prepared under the authority of the Mining and Quarrying Requisites Industry Standards Committee, was first issue
11、d in1938 and revised in1965. This new edition brings the previous standard into line with present practice, and incorporates a range of principles and requirements adopted as standard for a group of gate-end boxes used primarily in coal mining in the UnitedKingdom. Any further revision, including co
12、nversion to the metric system, will be covered in a subsequent publication. It is recognized that the term “gate-end box” is quite general and may be applied to boxes containing different essential components, such as contactors, circuit-breakers, lighting transformers, etc.,depending upon the purpo
13、se for which they are to be used. This standard, designated as BS787-1, covers boxes in which the essential apparatus is an air-break electrically operated contactor, which together with the associated equipment provides control and protection for coalface machinery. BS787-2 covers gate-end boxes in
14、 which the essential apparatus is an air-break circuit-breaker. It is envisaged that additional parts of this BritishStandard will be issued to cover other types of gate-end boxes, such as lighting units and drill units. This Part of BS787 continues to accept a30 A rated box as standard, in addition
15、 to the80 A and150 A boxes originally recognized. A distinction is made between an isolator and an isolating switch, and tests are specified for an isolating switch capable of breaking the same current as the contactor. A test position in association with the isolating switch is an optional feature.
16、 In addition to earth fault protection, earth fault electrical lockout has been included. Reference is also made to BS3101, “Intrinsically safe remote-control circuits associated with restrained plugs and sockets for use in coal mines”, which lays down boundary conditions for the operation of the ci
17、rcuit. NOTEWhere metric equivalents have been given(seeAppendix A), the figures in imperial units are to be regarded as the standard. The metric conversions are approximate. More accurate conversions should be based on the tables in BS350, “Conversion factors and tables”.BS787-1:1969 BSI 01-2000 iii
18、 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 not of itself confer immunity from legal obligations. Summary of pages This document comprises
19、 a front cover, an inside front cover, pagesi to iv, pages1to14, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankBS787-1:1969 BSI 01-20
20、00 1 1 Scope This BritishStandard specifies requirements for flameproof gate-end boxes designed primarily for use, in the mining industry, on3-phase a.c. circuits up to650V, for direct-on-line contactor starting and for the protection of coalcutters, conveyors, loaders and the like. 2 Definitions Fo
21、r the purposes of this BritishStandard, the following definitions apply: 2.1 gate-end box a flameproof enclosure containing electrical apparatus, such as control gear, switchgear and/or protective gear, designed primarily for use underground NOTEFor the purposes of this standard, the apparatus is es
22、sentially an air-break electrically operated contactor with associated equipment to provide control and protection for coalface machinery. 2.2 isolator a mechanical device capable of opening or closing a circuit, under conditions of no-load or negligible current 2.3 isolating switch a switch which i
23、solates a circuit and is capable of breaking not less than its rated current at rated voltage 2.4 contactor a device suitable for repeatedly opening and closing the circuits of electrical apparatus; it functions electro-magnetically, the speed of make and of break being independent of the operator 2
24、.5 cable coupling unit (flit plug) a unit consisting of a cable sealing box and cable gland together with means for connecting the cable conductors to insulated contact tubes within the sealing box, which is designed to receive the cable; to provide room to spread and connect the cores; to protect t
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 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:
- BS78711969SPECIFICATIONFORMININGTYPEFLAMEPROOFGATEENDBOXESGATEENDBOXESFORDIRECTONLINEMOTORSTARTINGFORUSEON3PHASEACCIRCUITSUPTO650V

链接地址:http://www.mydoc123.com/p-547099.html