1、BRITISH STANDARD BS 7019:1989 Specification for Fully screened 400 A bolted flameproof cable couplers and adaptors for use on systems up to and including 6.6 kV, primarily for use in mines UDC 622.812.2:621.315.683-213.34BS7019:1989 This British Standard, having been prepared under the directionof t
2、he Mining and Quarrying Requisites Standards Policy Committee, was published under the authority of the Board ofBSI and comes into effect on 31August1989 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference MQE/14 Draft for comment 87/75517 DC ISBN 0 580
3、16909 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Mining and Quarrying Requisites Standards Policy Committee (MQE/-) to Technical Committee MQE/14 upon which the following bodies were represented: Association of British Mining Equi
4、pment Companies British Cable Makers Confederation British Coal Corporation Council for Electrical Equipment for Flammable Atmospheres (BEAMA Ltd.) Health and Safety Executive Institution of Mining Electrical and Mining Mechanical Engineers Institution of Mining Engineers Rotating Electrical Machine
5、s Association (BEAMA Ltd.) Transmission and Distribution Association (BEAMA Ltd.) Amendments issued since publication Amd. No. Date of issue CommentsBS7019:1989 BSI 12-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Design and construction 2 4 D
6、imensions 4 5 Cable glands and cable sealing boxes 5 6 Type tests 5 7 Routine tests 6 8 Marking 8 Appendix A Information to be supplied with enquiry or order 9 Figure 1 Coupling dimensions 10 Figure 2 Nut for fixed contact element 11 Figure 3 Key for fixed contact element nut 11 Figure 4 Separate co
7、ntact unit 12 Figure 5 Dimension of sealing ring 13 Figure 6 Straight adaptor 14 Figure 7 Angle adaptor 15 Figure 8 Insulated end cover 16 Figure 9 Methods of measuring electrical clearances 17 Figure 10 Coupler glandsets for pliable wire armoured cables 21 Figure 11 Coupler glandsets for single and
8、 double wire armoured cables (SWA illustrated) 22 Table 1 Properties of primary insulating materials 3 Table 2 Properties of the sealing ring 4 Table 3 Minimum creepage and clearance distances 5 Table 4 Details of coupler glandsets 5 Table 5 Bending forces 7 Publications referred to Inside back cove
9、rBS7019:1989 ii BSI 12-1999 Foreword This British Standard has been prepared under the direction of the Mining and Quarrying Requisites Standards Policy Committee. It was devised to rationalize the principal features of fully screened, 400A bolted flameproof cable couplers and associated adaptors fo
10、r use on system voltages up to6.6kV and designed primarily for equipment used in mines. This standard makes provision for special purpose items such as interface units for connection to adaptors and cable couplers specified in BS3454 and BS3905. A British Standard does not purport to include all the
11、 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. Attention is drawn to the Health and Safety at Work etc. Act1974, the Mines and Quarries Act195
12、4, the Regulations made under these Acts, and also any other appropriate statutory requirements or bye-laws. These place responsibility for complying with certain specific safety requirements on the manufacturer and the user. The address of the recognized certification authority in the UK for Group
13、I (coal mining) apparatus for flameproof purposes is as follows: Health and Safety Executive, HSE (M) Certification Support Unit, Harpur Hill, Buxton Derbyshire, SK17 9JN. Copyrights subsist in products made to the illustrations herein. The copyright owner has agreed with BSI to grant licences under
14、 the copyright to all applicants on reasonable and non-discriminating terms. For details apply to the Enquiry Section, BSI, Linford Wood, Milton Keynes, MK 14 6LE, enclosing a stamped addressed envelope for reply. Summary of pages This document comprises a front cover, an inside front cover, pagesia
15、ndii, pages1to22, 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.BS7019:1989 BSI 12-1999 1 1 Scope This British Standard specifies requirement
16、s for400A bolted flameproof cable couplers and adaptors of the fully screened3-phase type with a voltage rating of up to and including6.6kV primarily for use in mines. 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 adap
17、tors. The dimensional and test requirements for cable coupling units also cover conversion units that enable couplers/adaptors complying with this standard to be connected to couplers/adaptors complying with BS3454 and BS3905. In all cases the electrical connections are made by separate connecting e
18、lements. 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 couplers complying with this standard are prim
19、arily intended for use with3- or4-core, individually screened, wire armoured cables, where the fourth conductor is earthed. Couplers and adaptors complying with this standard are not intended to be coupled or uncoupled while the circuit is energized. The dimensions necessary to provide for the conne
20、ction of couplers of different manufacture and some electrical and mechanical requirements are specified. This standard does not, however, purport to specify a fully detailed design. Information to be supplied by the purchaser with the enquiry or order is given in Appendix A. NOTEThe titles of the p
21、ublications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard the following definitions apply. 2.1 cable coupling unit a detachable cable sealing box utilizing suitable connecting elements to facilitate ready connection to, or d
22、isconnection from, a similar unit or other apparatus 2.2 bolted flameproof cable coupler two cable coupling units complete with suitable contact elements and a sealing ring, that, when bolted together to form a straight-through connecting box, complies with the relevant requirements of BS4683-2, and
23、 BS5501-5 2.3 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, including provision for making electrical connection to the armouring, screens and lead sheath of the cable, where applicable 2.4 cable sealing box a device
24、 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 and having a cable gland for attaching the cable to the box, together with any terminals provided for connection to the conductors of the cabl
25、e within the box. The box may form part of, or be detachable from, the apparatus with which it is associated 2.5 adaptor a device used to connect either a cable coupling unit or other types of cable terminations to apparatus. If used to connect a cable coupling unit it may either be separate from or
26、 be integral with the enclosure of the apparatus 2.6 insulated end cover a metal cover, suitably insulated, that when bolted to the coupling face of a cable coupling unit or adaptor (with a suitable sealing ring arrangement), completes the flameproof enclosure of the cable coupling unit or adaptor a
27、nd enables full working voltage to be applied 2.7 filling medium a bituminous-based compound or an acceptable cast resin that when used in the coupler/adaptor is suitable for the electrical stresses imposed in service and prevents the ingress of moisture NOTEFor the purpose of certification in the U
28、K, where other than bituminous-based compounds are used as a filling medium, the acceptance procedure will be administered by the Health and Safety Executive until a suitable British Standard is available. 2.8 contact element a device which comprises a fixed and a separate element allowing an electr
29、ical connection between two couplers or a combination of coupler and adaptorBS7019:1989 2 BSI 12-1999 3 Design and construction 3.1 Temperature rise The temperature rise of the cable coupling unit shall comply with 6.1. 3.2 Flameproof enclosure All enclosures and insulated end covers used with coupl
30、ers and adaptors shall be of a type that has been manufactured to comply with BS4683-2 or BS5501-5 or BS6709. NOTE 1Flameproof apparatus complying with this standard and for use in those UK mines where it has to be interfaced with flameproof apparatus complying with other British Standards such as B
31、S229 or BS4683-2, should comply with BS6709. NOTE 2Where flameproof apparatus is not interfaced as in note1, to promote the increasing use of BS5501-5in parallel with the progressive phasing out of GroupI apparatus in accordance with earlier standards, such apparatus should comply with BS5501-5. The
32、 external components shall either be of a corrosion resistant ferrous alloy, or of non-ferrous metal other than aluminium, magnesium or titanium or any alloy containing aluminium and/or magnesium and/or titanium unless the total content of these constituents does not exceed15% by mass and in which t
33、he content of magnesium and titanium together does not exceed6% by mass. No component part shall be painted or coated with preparations containing, in metallic form, aluminium, magnesium or titanium. NOTE 3These limits have been imposed to avoid the hazards of incendive sparking due to friction betw
34、een rusted steel or iron and the metals referred to. NOTE 4Where the body of an adaptor forms part of the main flameproof enclosure of other apparatus, it may be of the same metal as that of the main enclosure. 3.3 Cables Bolted flameproof cable couplers shall be capable of receiving cables with con
35、ductors up to a maximum size of185mm 2 . 3.4 Insulation 3.4.1 Materials. Properties of materials for insulating the primary live components shall comply with the values given in Table 1. 3.4.2 Housing for fixed contact element. The housing shall comprise a non-ferrous metallic block incorporating th
36、e primary insulating tubes, into which the fixed contact elements shall be fitted. The design of the housing shall be such that full interphase screening, extending from the front face of the housing to a point at least10mm beyond the core screen termination is achieved for all phases. The screen an
37、d its earth connections shall withstand a current of400A for500ms, the maximum temperature rise shall not exceed50K. The material forming the primary insulating tubes shall be free from voids and other defects and shall comply withTable 1 and7.3. 3.5 External body features 3.5.1 Enclosures. The case
38、 of the cable coupling unit, adaptor, or insulated end cover shall be so designed that it does not readily admit water when properly assembled, i.e. with cable coupling units complete with cable. Castings shall comply with7.1.1. 3.5.2 External earthing. Means shall be provided on the cable gland to
39、enable the fitting of an earthing bond. On coned draw type glands an extra securing nut and washer on one of the draw bolts shall satisfy this requirement. 3.5.3 Internal earthing 3.5.3.1 General. Provision shall be made within the cable sealing box for bonding to earth the earth core and/or any scr
40、eens which may be incorporated in the cable as specified in 3.5.3.2 to3.5.3.4. Any support pillar or component used for bonding shall be capable of withstanding the application of a short circuiting current as described in6.2.2. 3.5.3.2 Earth core. The earth core shall be terminated in either a bras
41、s or copper terminal (bored to accept the relevant core) with provision for attachment to either any support pillar, or the box body. 3.5.3.3 Braided-wire core screens. The braided-wire core screens shall be terminated in at least three brass or copper terminals (bored to accept the tails formed by
42、unpicking the braid screens) with provision for attachment to either any support pillar, interphase barrier, or the box body. 3.5.3.4 Copper-tape core screens. The copper-tape core screens shall be terminated on the face of the cable gland, interphase barrier, or box body by means of a stud or screw
43、 terminal. 3.6 Contact element The contact element shall have an assigned short time rating as described in6.2.2 and comply with6.1 for thermal cycling performance. 3.6.1 Fixed contact element for copper cable 3.6.1.1 The fixed contact element shall be fitted in the coupler body and if designed for
44、use with copper cables shall comply with 3.6.1.2 and3.6.1.3. It shall be manufactured from copper of grade C101 or C102 complying with BS1433 and the nose profile shall be silver plated, complying with BS2816:1973:Cu/Ag2and shall be generally in accordance withFigure 1.BS7019:1989 BSI 12-1999 3 Tabl
45、e 1 Properties of primary insulating materials 3.6.1.2 The part of the fixed contact element receiving the copper cable shall be so manufactured as to permit compression jointing of the copper conductor onto the element. The dimensions and tolerances of that part of the element shall be in accordanc
46、e with the compression tool manufacturers recommendations. Markings shall be provided to assist in the location of the compression dies. These markings shall not remove or displace material such as could affect the efficacy of the completed compression joint. 3.6.1.3 The contact element shall have:
47、a) a suitable seal to prevent migration of the filling medium from one side of the insulating tube to the other side; b) a locking ring that effectively retains the contact element in its correct location in the insulating tube (seeFigure 2), (Figure 3 gives outline details of a suitable fastening k
48、ey); and c) a device that locates and prevents rotation of the contact element in the insulating tube. 3.6.2 Fixed contact element for aluminium cable 3.6.2.1 The fixed contact element shall be fitted in the coupler body and shall be formed by the friction welding of a copper billet onto an aluminiu
49、m billet. The copper section shall be manufactured from copper of grade C101 or C102 complying with BS1433, or alternatively of grade C111 complying with BS2874, and the nose profile shall be silver plated complying with BS2816:1973:Cu/Ag2and shall be generally in accordance withFigure 1. The aluminium section shall be manufactured from aluminium of grade1050A complying with BS1474 and shall comply with 3.6.2.2 and 3.6.2.3. The weld shall comply with7.2. 3.6.2.2 The part of the fixed contact element receiving the aluminium cable shall be so manuf
