BS 787-2-1968 Specification for mining type flameproof gate-end boxes - Gate-end boxes with air-break circuit-breakers (for use on 3-phase a c circuits up to 650 volts)《矿用式防爆电缆终端箱规.pdf
《BS 787-2-1968 Specification for mining type flameproof gate-end boxes - Gate-end boxes with air-break circuit-breakers (for use on 3-phase a c circuits up to 650 volts)《矿用式防爆电缆终端箱规.pdf》由会员分享,可在线阅读,更多相关《BS 787-2-1968 Specification for mining type flameproof gate-end boxes - Gate-end boxes with air-break circuit-breakers (for use on 3-phase a c circuits up to 650 volts)《矿用式防爆电缆终端箱规.pdf(22页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS787-2:1968 Incorporating Amendment No.1 Specification for Mining type flameproof gate-end boxes Part 2: Gate-end boxes with air-break circuit-breakers (for use on 3-phase a.c. circuits up to650volts)BS787-2:1968 This BritishStandard, having been approved by the CollieryRequisites
2、Industry Standards Committee and endorsed by the Chairman oftheEngineering Divisional Council, was published undertheauthority of the GeneralCouncil on 30August1968 BSI01-2000 The following BSI references relate to the work on this standard: Committee reference CRE/16 Draft for comment66/9630 ISBN 0
3、 580 00277 2 Co-operating organizations The Colliery Requisites Industry Standards Committee, under whose supervision this BritishStandard was prepared, consists of representatives from the following Government and scientific and industrial organizations: Association of Mining Electrical and Mechani
4、cal 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 Engineers Associatio
5、n 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. Amendments issued si
6、nce publication Amd. No. Date of issue Comments 422 February 1970 Indicated by a sideline in the marginBS787-2:1968 BSI 01-2000 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Service conditions 3 4 Ratings 3 5 Marking 3 6 Design and construction
7、 4 7 Tests 8 8 Information to be supplied to the manufacturer with the enquiry 10 Appendix A Metric values 12 Figure 1 Arrangement of busbar chamber end flange, terminals andinterconnections 13 Figure 2 Busbar interconnecting trunk 14 Figure 3 Skid coupling arrangement 15 Figure 4 Busbar end cover 1
8、6BS787-2:1968 ii BSI 01-2000 Foreword This standard makes reference to the following BritishStandards: BS88, Cartridge fuses of voltage ratings up to660volts. BS159, Busbars and busbar connections. BS229, Flameproof enclosure of electrical apparatus. BS279, 100-ampere flameproof plugs and sockets (r
9、estrained type). BS542, Cable glands and sealing boxes for association with apparatus for use at mines. BS862, Air-break circuit-breakers (including totally-enclosed and flameproof types) for voltages not exceeding660volts. BS936, Oil circuit-breakers for medium-voltage alternating-current systems.
10、BS1259, Intrinsically safe electrical apparatus and circuits for use in explosive atmospheres. BS3101, Intrinsically safe remote-control circuits associated with restrained plugs and sockets for use in coal mines. BS3454, 3.3kV300A interchangeable bolted flameproof cable couplers and adaptors (inclu
11、ding660V300A adaptors) primarily for use in mines. This BritishStandard has been prepared, under the authority of the Colliery Requisites Industry Standards Committee, to standardize the main features of gate-end boxes used primarily in coal mining in the United Kingdom. It is recognized that the te
12、rm “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 purpose for which they are to be used. BS787 was first issued in1938, and has been revised and re-issued as B
13、S787-1:1965 to cover gate-end boxes in which the essential apparatus is an air-break electrically operated contactor. This additional specification, designated as BS787-2, extends the scope of the original BS787 by covering gate-end boxes in which the essential apparatus is an air-break circuit-brea
14、ker. It is envisaged that additional parts of this BritishStandard will be issued to cover other forms of gate-end boxes, such as lighting units and drill units. NOTEWhere metric equivalents have been given (seeAppendix A), the figures in imperial units are to be regarded as the standard. The metric
15、 conversions are approximate. More accurate conversions should be based on the tables in BS350-1, “Conversion factors and tables”. 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. Comp
16、liance 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 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorpo
17、rated. This will be indicated in the amendment table on the inside front cover.BS787-2:1968 BSI 01-2000 1 1 Scope This BritishStandard specifies requirements for mining type flameproof gate-end boxes with air-break circuit-breakers for use on3-phase a.c. circuits up to650volts. 2 Definitions For the
18、 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 NOTEIn this particular instance the apparatus is essentially an a
19、ir-break circuit-breaker with associated equipment to provide control and protection of other electrical apparatus. 2.2 isolator a mechanical device capable of opening or closing a circuit, under conditions of no load or negligible current 2.3 air-break circuit-breaker a device, hand or power operat
20、ed, capable of making, carrying and breaking currents in air, at substantially atmospheric pressure, under normal circuit conditions and also making, carrying for a specified time, and breaking currents under specified abnormal conditions such as those of short-circuit 2.4 cable sealing and dividing
21、 box a box designed to receive and protect the end of the cable, with provision for sealing the conductors and the insulating material of the cable with a suitable compound, and having a cable gland for attaching the cable to the box, together with any terminals provided for connection to the conduc
22、tors of the cable within the box. The box may form part of, or be detachable from, the apparatus with which it is associated 2.5 detachable cable sealing box a cable sealing box so designed that it can be detached from associated apparatus without cutting the cable and without disturbing the sealing
23、 2.6 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; toprovide room to spread and connect the cores; to protect
24、the cores; to allow for the attachment of the cablegland; to provide for sealing the insulating materials of the cable, and to facilitate ready connection to or disconnection from a similar unit or other apparatus 2.7 cable coupler adaptor a device used to connect a cable coupling unit to apparatus.
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- BS78721968SPECIFICATIONFORMININGTYPEFLAMEPROOFGATEENDBOXESGATEENDBOXESWITHAIRBREAKCIRCUITBREAKERSFORUSEON3PHASEACCIRCUITSUPTO650VOLTS
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