1、BRITISH STANDARD BS3454:1995 Specification for 1.9/3.3 kV, 300 A bolted flameproof cable couplers and adaptors (including380/660V and640/1100V,300A adaptors) for use in coal mines UDC 622.005:621.315.687213.34BS3454:1995 This British Standard, having been prepared under the direction of the Engineer
2、ing SectorBoard, was published underthe authority of the Standards Board and comesintoeffect on 15 November1995 BSI 06-1999 First published April 1962 Second edition May 1984 Third edition November 1995 The following BSI references relate to the work on this standard: Committee reference MRE/14 Draf
3、t for comment 92/76794 DC ISBN 0 580 22638 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee MRE/14, Cable glands, sealing boxes, couplers, plugs and sockets, upon which the following bodies were represented: Association
4、of British Mining Equipment Companies Association of Mining Electrical and Mechanical Engineers BEAMA Transmission and Distribution Association Electric Cable Makers Confederation Health and Safety Executive Institution of Mining Engineers National Coal Board National Union of Mineworkers Rotating E
5、lectrical Machines Association (BEAMA) Amendments issued since publication Amd. No. Date CommentsBS3454:1995 BSI 06-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Definitions 1 4 Information to be documented 2 5 Design and construction 2 6 Dimen
6、sions 7 7 Cable glands and cable sealing boxes 7 8 Type tests 7 9 Routine tests 10 10 Marking 12 Figure 1 3.3kV,300A cable half coupler 13 Figure 2 Alternative front face for mouldings 14 Figure 3 Contact pin 15 Figure 4 Pilot contact pins 16 Figure 5 Sealing ring 17 Figure 6 Straight adaptor 18 Fig
7、ure 7 Angle adaptor 19 Figure 8 Branch adaptor (for gate end boxes) 20 Figure 9 Adaptor pin 21 Figure 10 Insulated end cover 22 Figure 11 Electrical creepage distances and clearances for cable coupler 23 Figure 12 Electrical creepage distances and clearances for adaptors to enclosures 24 Figure 13 C
8、reepage distances and clearances 26 Figure 14 Coupler glandsets for pliable wire armoured cables 26 Figure 15 Coupler glandsets for single and double wire armoured cables 27 Figure 16 Gland for single or double wire armoured cable for non-metallic cable sealing box 27 Table 1 Properties of electrica
9、l insulating materials 3 Table 2 Properties of sealing ring 6 Table 3 Minimum creepage distances and clearances 7 Table 4 Details of coupler glandsets 9 Table 5 Tensile load 9 Table 6 Bending forces 11 Table 7 Test voltages 11 List of references 28BS3454:1995 ii BSI 06-1999 Foreword This British Sta
10、ndard has been prepared by Technical Committee MRE/14. It supersedes BS3454:1984 which is withdrawn. Previously the flameproof enclosures were required to conform to BS4683-2:1971; in this revision the opportunity has been taken to update the standard to the requirements of BS5501-5:1977, which is i
11、dentical with the European Standard EN50018:1977. The1984 edition of this standard allowed an arrangement with a centre pilot contact tube but did not specify requirements. As a result two British manufacturers each developed their own design of pilot contact tubes. This revision allows these to be
12、accommodated. This is a companion standard to BS3905:1995, which covers3.8/6.6kV couplers and adaptors. Attention is drawn to the Health and Safety at Work etc. Act1974 1, the Mines and Quarries Act1954 2, the Regulations made under these Acts, and also any other appropriate statutory requirements o
13、r byelaws. These place responsibility for complying with certain specific safety requirements on the manufacturer and the user. The addresses of the recognized certification authorities in the UK for Group I (mines susceptible to firedamp) apparatus for flameproof purposes are as follows. Health and
14、 Safety Executive Mining Equipment Certification Service Harpur Hill Buxton Derbyshire SK179JN SIRA Certificate Service Saighton Lane Saighton Chester CH36EG A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for thei
15、r 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 and ii, pages1 to28, an inside back cover and a back cover. This standard has been updated (see c
16、opyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS 3454:1995 BSI 06-1999 1 1 Scope This British Standard specifies requirements for300A bolted flameproof cable couplers and adaptors of semi-screened three-phase, or unsc
17、reened three-phase with centre pilot tube type, with the following voltage ratings: 1.9/3.3kV; 380/660V and640/1100V. The couplers are designed to enable two cables to be coupled together or to enable a cable to be coupled to apparatus by use of adaptors, in both cases the electrical connections bei
18、ng made by separate connecting pins. Provision is also made for insulated end covers. The use of other forms of intermediate box, with coupling arrangements as specified in this standard, are not precluded provided that all other relevant requirements of this standard are met. The semi-screened cabl
19、e couplers are primarily intended for use with three or four-core wire armoured cables where the fourth conductor is earthed. The cable couplers incorporating a centre pilot are primarily intended for use with three-core wire armoured cables having an additional pilot core(s). Couplers and adaptors
20、conforming to this standard are not intended to be coupled or uncoupled when the circuit is energized. The dimensions necessary to provide for the connection of enclosures of different manufacture and some electrical and mechanical requirements are specified. This standard does not, however, purport
21、 to specify a fully detailed design. NOTEThe figures in this standard show only those essential features and dimensions for function and interchangeability. Dimensions are in millimetres. 2 References 2.1 Normative references This standard incorporates, by dated or undated reference, provisions from
22、 other publications. These normative references are cited at the appropriate points in the text and the publications are listed on page28. Subsequent amendments to, or revisions of, any of these publications apply to this standard only when incorporated in it by updating or revision. 2.2 Informative
23、 references This standard refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 3 Definitions For the purposes of this B
24、ritish Standard, the following definitions apply. 3.1 cable half coupler a detachable cable sealing box utilizing contact tubes and pins to facilitate ready connection to, or disconnection from, a similar unit or other apparatus 3.2 bolted flameproof cable coupler two cable half couplers together wi
25、th contact pins and a sealing ring that, when bolted together to form a straight-through connecting box, conforms to the relevant requirements of BS5501-5:1977 3.3 cable gland a device designed to secure the end of the cable to the cable sealing box, by means appropriate to the type of cable, includ
26、ing provision for making electrical connection to the armouring and lead sheath of the cable, where applicable 3.4 cable sealing box a device designed to receive and protect the end of the cable, with provision for sealing the conductors and the insulating material of the cable with filling medium a
27、nd having a cable gland for attaching the cable to the box, together with any terminals provided for connection to the conductors of the cable within the box 3.5 adaptor a device used to connect a cable half coupler to apparatus, which can either be separate from, or be integral with, the enclosure
28、of the apparatus and which can include live-line indication 3.6 intermediate box a box that can be inserted between two cable half couplers or between a cable half coupler and an adaptor, to perform a specific function, e.g.live-line indication or metering 3.7 insulated end cover a metal cover, suit
29、ably insulated, that, when bolted to the coupling face of a cable half coupler or adaptor (with a sealing ring interposed), completes the flameproof enclosure of the cable half coupler or adaptor and enables full working voltage to be appliedBS3454:1995 2 BSI 06-1999 3.8 filling medium a bituminous-
30、based compound conforming to BS1858:1986 or a resin-based compound conforming to BS7383:1990 that is suitable for the electrical stresses imposed in service CAUTION. Because of the increased fire risk, bituminous-based compounds are not accepted by the Health and Safety Executive as a filling medium
31、 in new cable couplers certified for use in British coal mines. 4 Information to be documented The following information to be supplied by the purchaser shall be fully documented. Both the definitive requirements specified throughout the standard and the following documented items shall be satisfied
32、 before a claim of compliance with the standard can be made and verified. a) General 1) The number and date of this British Standard, i.e.BS 3454:1995. 2) The working voltage of the system on which the equipment is to be used. 3) The group number, or group numbers, of the gases or vapours in which t
33、he cable half couplers or adaptors are to be used. b) Cable half couplers 1) The nominal size of conductors (in square millimetres), also under the armour diameter and the overall diameter of cable. 2) The type of the cable to be used. NOTE 1The number of an appropriate British Standard or other rec
34、ognized specifications should be quoted, or for non-standard cables complete details of the cables construction and dimensions should be given. 3) The number of contact pins and/or tubes (phase and pilot) required. 4) The type of contact tube cable termination required (compression or clamping). 5)
35、The number of sealing rings required. 6) Whether filling medium and jointing tapes are required. 7) The type of gland required. NOTE 2Certain types of cable core insulation, notably polyethylene, are liable to exhibit cracking when subjected to prolonged contact with some bituminous filling compound
36、s. The advice of the cable manufacturer should be sought as to the recommended grade of filling medium. c) Adaptors 1) The nominal size (in square millimetres) of conductor in the connecting leads. 2) Whether leads are stranded or flexible. 3) The number of contact tubes and/or adaptor pins (phase a
37、nd pilot) required. 4) The type of contact tubes and/or adaptor pins (compression or clamping) required. 5) The number of sealing rings required. 6) Where appropriate, whether a filling medium and jointing tapes are required (seenote2). 5 Design and construction 5.1 General The general arrangement (
38、except for the front face for insulators) and essential dimensions of both semi-screened and unscreened cable half couplers shall be as shown in Figure 1. The front face for insulators shall be as shown in either Figure 1 or Figure 2. 5.2 Temperature rise The temperature rise of the cable half coupl
39、ers shall conform to8.2.1. 5.3 Flameproof enclosure All enclosures and insulated end covers used with couplers and adaptors shall be of a type that has been manufactured in accordance with BS5501-5:1977 for Group I electrical apparatus. Only corrosion resistant ferrous alloys or non-ferrous metals p
40、ermitted by BS5501-1:1977, shall be used in the construction of the flameproof joint and the cable gland. The cable sealing box shall either be constructed from the same metals, or be an encapsulated assembly conforming to BS5501-8:1988. 5.4 Cables Cable half couplers shall be capable of receiving c
41、ables with phase conductors up to the following maximum sizes: 5.5 Insulation 5.5.1 Materials Properties of materials for insulating components shall conform to the values given in Table 1. 5.5.2 Insulators Insulators shall be free from voids and defects and each shall conform to8.1. a) copper (stra
42、nded) 185mm 2 ; b) aluminium (stranded) 185mm 2 ; c) copper (flexible) 150mm 2 .BS 3454:1995 BSI 06-1999 3 Table 1 Properties of electrical insulating materials 5.5.3 Earthed metallic screen Insulators used in semi-screened cable half couplers or adaptors shall have fitted to their front face an ear
43、thed metallic screen. The radial fins of the screen shall be located midway between the three contact spouts to provide earthed segregation. The fins of the earthed metallic screen and its earth connections shall withstand a current of300A for500ms and the temperature rise shall not exceed50K. 5.6 E
44、xternal body features 5.6.1 Enclosure Assembled cable half couplers, intermediate boxes and insulated end covers, when joined together in any combination, shall have a minimum degree of protection of IP54 conforming to BSEN60529:1992. Adaptors shall also have a minimum degree of protection of IP54 c
45、onforming to BS EN60529:1992 at the interface with a cable half coupler, intermediate box or insulated end cover. Metal castings shall conform to9.2. 5.6.2 External earthing Provision shall be made on the cable gland assemblies for the fixing of a copper earth bond. 5.6.3 Internal earthing 5.6.3.1 G
46、eneral Provision shall be made within the cable sealing box for bonding to earth the earth core and/or any screens that may be incorporated in the cable in accordance with5.6.3.2 to5.6.3.4. Any support pillar or component used for bonding shall be capable of withstanding the short circuit requiremen
47、ts specified in8.3. 5.6.3.2 Earth core The earth core shall be terminated in either a brass or copper terminal (bored to accept the relevant core) with provision for attachment to either any support pillar or the box body. 5.6.3.3 Braided wire core screens The braided wire core screens shall be term
48、inated in one or more brass or copper terminals (bored to accept the tails formed by unpicking the braid screens) with provision for attachment to either any support pillar or the box body. 5.6.3.4 Copper tape core screens The copper tape core screens shall be terminated on the face of the glandset
49、or box body by use of a stud terminal. 5.7 Separate contact pins 5.7.1 Separate phase contact pins shall be provided to afford electrical connection between the phase contact tubes of two mating cable half couplers or a cable half coupler and adaptor. The contact pin shall be as shown in Figure 3. It shall be solid and manufactured from medium-hard copper of grade C101or C102conforming to BS1433:1970or grade C111 conforming to BS2874:1986, having a hardness of not less than70HB when tested in accordance with BS240:1991and a volu
