1、BRITISH STANDARD BS 5126-1: 1993 Mining type flameproof supply and control units for use on systems up to 1100 V Part 1: Specification for direct-on-line motor startersBS5126-1:1993 This British Standard, having been prepared under the directionof the Mining RequisitesStandards Policy Committee, was
2、 published underthe authority of the Standards Board and comesintoeffect on 15December1993 BSI 09-1999 First published August1974 Second edition December1993 The following BSI references relate to the work on this standard: Committee reference MRE/16 Draft for comment 89/79377 DC ISBN 0 580 22421 X
3、Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Mining Requisites Standards Policy Committee (MRE/-) to Technical Committee MRE/16, upon which the following bodies were represented: Association of British Mining Equipment Companies Briti
4、sh Coal Corporation Health and Safety Executive Amendments issued since publication Amd. No. Date CommentsBS5126-1:1993 BSI 09-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Definitions 1 4 Information and requirements to be agreed and to be doc
5、umented 2 5 Service conditions 3 6 Rated values 3 7 Design and construction 3 8 Verification and tests 10 9 Marking 11 Figure 1 Outline of enclosures showing arrangements for earthing terminals and skid couplings 12 Figure 2 Busbar chamber end flange 13 Figure 3 Busbar interconnecting trunk with cov
6、er plate 14 Figure 4 650/1 100 V busbar interconnecting adaptor trunk 15 Figure 5 650/1 100 V skid coupling plate 16 Figure 6 End cover for busbar chamber 17 Figure 7 Example of outgoing cable fittings 18 Figure 8 Envelope dimensions for padlocks 19 Table 1 Creepage distance and clearance 10 List of
7、 references 20BS5126-1:1993 ii BSI 09-1999 Foreword This Part of BS5126has been prepared under the direction of the Mining Requisites Standards Committee. It supersedes BS5126-1:1974, which is withdrawn. This revision updates the standard to reflect todays usage of1100V mining type flameproof supply
8、 and control units (commonly known in the UK as “gate-end boxes”) and takes account of expected future development. This Part of BS5126covers units in which the essential apparatus are direct-on-line motor starters, whilst Parts2, 3 and4 cover circuit breaker units, lighting transformer units and un
9、its to power drilling machines, respectively. All have standard busbar and other fixing dimensions, enabling the different units to be fastened together to form a switchboard. This standard is arranged to be in close alignment with IEC (InternationalElectrotechnical Commission) criteria for various
10、electrical features. 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. Attention is drawn t
11、o 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 or byelaws. These place responsibility for complying with certain specific safety requirements on the manufacturer and the us
12、er. The addresses of the recognized certification authorities in the United Kingdom for Group I (mines susceptible to firedamp) apparatus are: Health and Safety Executive Mining Equipment Certification Service Harpur Hill, Buxton, Derbyshire, SK179JN SIRA Certification Service Saighton Lane, Saighto
13、n, Chester CH36EG Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 20, 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
14、table on the inside front cover.BS5126-1:1993 BSI 09-1999 1 1 Scope This Part of BS5126specifies requirements for flameproof supply and control units designed primarily for use in the coal mining industry on1100V three-phase a.c. circuits, and dual-voltage1100V/550V units, for direct-on-line contact
15、or starting and for the protection of coal-getting, conveying and similar machinery. Provision is also made for operation on other voltages, where required. In addition to the definitive requirements, this standard also requires the items detailed in clause4 to be documented. For compliance with thi
16、s standard, both the definitive requirements and the documented items have to be satisfied. NOTE 1To facilitate cross-reference and subject location recall between the Parts of this standard, a uniformity of clause arrangements is maintained. At subclause level, because of the different purposes and
17、 individual technical features of the four types of control unit, some differences in title and/or subclause arrangements have been unavoidable, but have been made without disturbing the general pattern. NOTE 2The figures in this standard show only those features and dimensions essential for functio
18、n and interchangeability. Dimensions are in millimetres. Untoleranced values less than100mm are 0.15mm and those greater than100mm are 0.25mm. 2 References 2.1 Normative references This Part of BS5126 incorporates, by reference, provisions from specific editions of other publications. These normativ
19、e references are cited at the appropriate points in the text and the publications are listed on the page 20. Subsequent amendments to, or revisions of, any of these publications apply to this British Standard only when incorporated in it by updating or revision. 2.2 Informative references This Part
20、of BS5126refers 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 page 20, but reference should be made to the latest editions. 3 Definitions For the purposes of this Part of BS5126, the followin
21、g definitions apply 1) . 3.1 supply and control unit (gate-end box) a flameproof enclosure containing electrical apparatus, such as transformers, control gear, switchgear and/or protective gear, designed primarily for use underground NOTE 1In this Part of BS5126, the term “unit” has in many instance
22、s been used in abbreviation of “supply and control unit”. NOTE 2For the purposes of this Part of BS5126, the enclosed apparatus is essentially a contactor with associated equipment. 3.2 switch disconnector (isolating switch) a switch which isolates a circuit and is capable of breaking not less than
23、its rated current at rated voltage 3.3 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 3.4 cable half coupler (flit plug) a detachable cable sealin
24、g box utilizing contact tubes and pins to facilitate ready connection to, or disconnection from, a similar unit or other apparatus 3.5 cable coupler adaptor a device used to connect either a cable half coupler or other type of cable termination to apparatus. If used to connect a cable half coupler i
25、t may either be separate from, or be integral with, the enclosure of the apparatus 3.6 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 a filling compound and having a cable gland
26、for attaching the cable to the box, together with any terminals provided for connection to the conductors of the cable within the box. The box may form part of, or be detachable from, the apparatus with which it is associated 3.7 detachable cable sealing box a cable sealing box that can be detached
27、from associated apparatus without disturbing the sealing of the cable 3.8 dual-voltage unit a unit capable of operating from either of two selected supply voltages, the preferred values of which are1100V and550V 1) The terms in brackets are those commonly used in practice.BS5126-1:1993 2 BSI 09-1999
28、 3.9 restrained plug and socket a plug and socket in which the two portions are engaged, retained and disengaged by means of a manually operated device 3.10 bolted cable plug and socket a plug and socket designed to be held together by two or more bolts or screws, or studs and nuts in such a way tha
29、t the plug cannot be disengaged from the socket without the use of a tool 3.11 sequence interlocking means by which operation is made dependent on the fulfilment of other prescribed conditions 3.12 overcurrent protection a device that causes the circuit being protected to be automatically disconnect
30、ed from the supply when the current exceeds the predetermined value NOTEThe preferred term “overcurrent” is used throughout this standard, but in certain other British Standards to which reference is made, the term “overload” may be used when referring to these devices. 3.13 inverse time lag overcur
31、rent release a device that retards the tripping of the contactor by a time inversely dependent upon the magnitude of the overcurrent 4 Information and requirements to be agreed and to be documented 4.1 Information to be supplied by the purchaser The following information to be supplied by the purcha
32、ser shall be fully documented. Both the definitive requirements specified throughout the standard and the following documented items shall be satisfied before a claim of compliance with the standard can be made and verified. a) the number and date of this British Standard, i.e. BS5126-1:1993; b) the
33、 service conditions, if other than those specified in Clause5; c) information relating to the motor to be controlled, where known: 1) the full load current or rated output of the motor in kilowatts; 2) the starting current of the motor; 3) any information concerning special conditions likely to affe
34、ct the performance of the contactor; d) any information concerning special conditions likely to affect the performance of the unit; e) whether the unit is to have dual-voltage and, if so, the rated supply voltages (see6.1); f) the rated frequency of the supply system and its deviation if greater tha
35、n 2 Hz (see6.2); g) the rated thermal load current (see6.3); h) the rated thermal current of busbars (see6.4); i) whether two or more units are to be coupled together (see7.4); j) whether provision for incoming and throughgoing cable fittings is required at one or both ends of the unit, and the type
36、 of fitting required (see7.6.1); k) the type of outgoing cable fittings, together with the number, if any, of the auxiliary cable fittings needed and the control and interlock circuit for the restrained plug and socket of the outgoing cable, if other than one conforming to BS3101:1986 and BS7202:198
37、9(see7.6.2); l) whether provision is necessary for the fitting of auxiliary cable glands (see7.6.3); m) the type of contactor (see7.9.1); n) whether short circuit protection is to be omitted (see7.10.2); o) whether any auxiliary circuits are to be connected across the power circuit (see7.10.4); p) t
38、he type of earth fault protection (see7.10.6); q) whether remote and pilot stop functions are to be omitted and whether a telemetry stop function is to be provided (see7.11.2); r) whether local, remote and pilot start functions are to be omitted and whether a telemetry start function is to be provid
39、ed (see7.11.3); s) the instrumentation (see7.14); t) live compartment indication in the switch disconnector chamber (see7.16); u) whether voltage-free auxiliary contacts are to be fitted and whether they are to be used for control (see7.21); v) the testing authority for type tests, if other than the
40、 manufacturer (see8.1.2); w) the certifying authority, if other than a UK authority (see foreword).BS5126-1:1993 BSI 09-1999 3 4.2 Items to be agreed between the contracting parties The following items to be agreed between the contracting parties, which are specified in the clauses referred to, shal
41、l be fully documented. Both the definitive requirements specified throughout the standard and the following documented items shall be satisfied before a claim of compliance with the standard can be made and verified. a) whether a test feature for the main contactor is to be provided (see7.9.2); b) a
42、dditional protection to take account of overloading (see7.10.1); c) the value of the prospective earth fault current (see7.10.6); d) whether earth fault electrical lockout is to be omitted (see7.10.7); e) the terminals to be marked and the information to be displayed (see9.2); f) the form of the dia
43、grams (see9.5). 5 Service conditions Within the limits of their ratings, units shall be suitable for use in installations operating under the intended service conditions. Unless otherwise specified by the purchaser see4.1 b), the service conditions shall not be more severe than the following. a) Amb
44、ient temperature: a peak value not exceeding40 C with an average value not exceeding35 C over24h periods. The lower limit of the ambient temperature is 5 C. b) Altitude: an altitude at the site of installation not exceeding2000m (6600ft) above sea-level. 6 Rated values 6.1 Supply voltage The maximum
45、 rated supply voltage shall be1100V. Units shall operate normally within the limits 10 % and +6 % of the declared rated supply voltage. The purchaser shall state on the enquiry and/or order whether the unit is to have dual-voltage see4.1 e). In this case, unless otherwise specified by the purchaser,
46、 the rated supply voltages shall be1100V and550V. 6.2 Supply frequency Units shall have a rated supply frequency within the range40Hz to62Hz. The purchaser shall state the supply frequency required, and its deviation if greater than 2Hz, on the enquiry and/or order see4.1 f). NOTEThe standard freque
47、ncy is50Hz. The normal deviation is not greater than 2Hz. 6.3 Thermal load current The maximum rated thermal load current of the unit, excluding outgoing cable fittings, shall be the current rating. Unless otherwise specified by the purchaser see4.1 g), the rated thermal load current of the unit sha
48、ll be one of the following: a) 150A; b) 250A. NOTEThe duty rated current may be less than the maximum rated thermal load current depending upon the lowest rated component fitted. 6.4 Thermal current of busbars The rated thermal current of busbars shall be stated. Unless otherwise specified by the pu
49、rchaser see4.1 h), the value shall be one of the following: a) 300A; b) 400A. 7 Design and construction 7.1 General The flameproof parts of a unit shall conform to one of the following standards: a) BS4683-2:1971; b) BS5501-5:1977; c) BS6709:1986; for Group I enclosures, with fittings in accordance with7.4, 7.5 and 7.6. However, units designed and certified before the date of publication of this standard, which have been certified flameproof in accordance with BS229for Group I gas (methane/firedamp), shall be deemed to conform to this
