BS 6207-3-2001 Mineral insulated cables with a rated voltage not exceeding 750 V Guide to use《额定电压不超过750V的矿物绝缘电缆 使用指南》.pdf

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1、BRITISH STANDARD BS 6207-3: 2001 Mineral insulated cables with a rated voltage not exceeding 750 V P a r t 3 : G u i d e t o u s e (Implementation of HD 586.3:2001) ICS 29.060.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS 6207-3:2001 This British Standard, having been p

2、repared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 4 October 2001 BSI 4 October 2001 The following BSI references relate to the work on this standard: Committee reference GEL/20

3、/1 Draft for comment 98/263045 DC ISBN 0 580 37077 1 National foreword This British Standard implements Harmonization Document HD 586.3:2001, which was published by the European Committee for Electrotechnical Standardization (CENELEC). The UK participation in its preparation was entrusted by Technic

4、al Committee GEL/20, Electric cables, to Subcommittee GEL/20/1, Wiring cables, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publi

5、cations referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary prov

6、isions 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. aid enquirers to understand the text; present to the responsible European committee any enquiries on the inter

7、pretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the HD title page, pages 2 to 10, an inside back cover and a b

8、ack cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsHARMONIZATION DOCUMENT HD 586.3 S1 DOCUMENT DHARMONISATION HARMONISIERUNGSDOKUMENT July 2001 CENELEC European Committee for Electrotechn

9、ical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. HD

10、586.3 S1:2001 E ICS 29.060.20 English version Mineral insulated cables with a rated voltage not exceeding 750 V Part 3: Guide to use Cbles isolant minral de tension assigne ne dpassant pas 750 V Partie 3: Guide demploi Mineralisolierte Leitungen mit einer Nennspannung bis 750 V Teil 3: Anwendungsric

11、htlinien This Harmonization Document was approved by CENELEC on 2000-12-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this Harmonization Document on a national level. Up-to-date lists and bibliographical referen

12、ces concerning such national implementation may be obtained on application to the Central Secretariat or to any CENELEC member. This Harmonization Document exists in three official versions (English, French, German). CENELEC members are the national electrotechnical committees of Austria, Belgium, C

13、zech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.BS 6207-3:2001 2 Foreword This Harmonization Document was prepared by the Technical Committee CENELEC TC 20, Electric cables. It

14、 was submitted to the Unique Acceptance Procedure and was approved by CENELEC as HD 586.3 S1 on 2000-12-01. The following dates were fixed: latest date by which the existence of the HD has to be announced at national level (doa) 2001-07-01 latest date by which the HD has to be implemented at nationa

15、l level by publication of a harmonized national standard or by endorsement (dop) 2002-01-01 latest date by which the national standards conflicting with the HD have to be withdrawn (dow) 2003-01-01 Annexes designated “informative“ are given for information only. In this standard, annex A is informat

16、ive. _BS 6207-3:2001 3 Contents Page Introduction . 4 1 Scope. 4 2 References. 4 3 Definitions 4 4 Safety. 4 4.1 Fundamental considerations 4 4.2 General . 4 4.3 Support and fixing. 5 5 Limiting conditions . 5 5.1 General . 5 5.2 Voltage 5 5.3 Current carrying capacity 5 5.4 Thermal effects. 6 5.5 M

17、echanical stress. 7 5.6 Compatibility . 7 5.7 Dynamic stresses . 7 5.8 Flexing 7 5.9 Corrosion protection and direct burial 7 6 Installation 8 7 Initial and periodic verification 8 8 Packaging, storage and handling / transportation. 8 8.1 Packaging. 8 8.2 Storage . 8 8.3 Handling / transportation. .

18、 9 Annex A (informative) Bibliography 10BS 6207-3:2001 4 Introduction The aim in publishing this standard is to inform users of the properties and limiting conditions for mineral insulated electric cables and therefore to avoid misuse of the cables. 1 Scope This standard provides a guide to the prop

19、osed safe use of electric cables and their terminations as presently covered in the following standards. HD 586 Mineral insulated cables with a rated voltage not exceeding 750 V Part 1: Cables Part 2: Terminations 2 References This standard refers to other publications that provide information or gu

20、idance. Editions of these publications current at the time of issue of this standard are listed in annex A but reference should be made to the latest editions. 3 Definitions The meaning and sense of the terms used in this standard are as defined in the current edition of HD 384.2 unless otherwise st

21、ated. 4 Safety 4.1 Fundamental considerations 4.1.1 Safety of a cable means that the product does not present an unacceptable risk of danger to life or property whilst being used in its intended manner. 4.1.2 Unless otherwise stated, cables should not be used for any other purpose than the transmiss

22、ion and distribution of electricity. 4.1.3 The test methods, test parameters and requirements described in the standards referred to in clause 1 are only for the purpose of checking design with respect to safety and quality assurance. They should not be regarded as providing guidance that the cables

23、 are suitable for service under conditions equivalent to the test conditions. 4.2 General 4.2.1 All conductors and cables should be selected so as to be suitable for the voltages and currents likely to occur under all conditions which are or should have been anticipated in the equipment or installat

24、ion in which they are used. 4.2.2 Cables should be so constructed, installed, protected, used and maintained as to prevent danger so far as it is reasonably practical. 4.2.3 The limiting temperature conditions under which mineral insulated cables and terminations can reasonably be expected to operat

25、e safely under normal circumstances are given in Table 1. These conditions are those considered capable of ensuring a length of life in service which has been accepted as reasonable by experience of the cable and terminations and in particular conditions of use.BS 6207-3:2001 5 4.2.4 Cables should b

26、e selected so that they are suitable for the operating conditions and equipment classification. Examples of operating conditions are: a) voltage; b) overcurrent; c) protective measures; d) grouping of cables; e) method of installation; f) accessibility. 4.2.5 Cables should be selected so that they a

27、re suitable for any external influences that may exist. Examples of external influences are: a) ambient temperature; b) presence of rain, steam or accumulation of water; c) presence of corrosive, flammable, chemical or polluting substances; d) mechanical stresses (such as through holes or sharp edge

28、s in metal work); e) fauna (such as rodents); f) flora (such as mould); g) radiation (such as sunlight). NOTE In respect of item g) it should be noted that colour is important, a black covering giving a higher degree of protection. 4.3 Support and fixing Cables should be supported adequately. Recomm

29、ended maximum spacings for surface installations are given in Table 2. For inaccessible positions the weight of the cable between supports should be taken into account and the advice of the cable manufacturer obtained. 5 Limiting conditions 5.1 General The influences of all factors as outlined in 5.

30、2 to 5.9 should be considered in combination not separately. 5.2 Voltage The rated voltage of a cable is the reference voltage for which the cable is designed and which serves to define the electrical tests. 5.3 Current carrying capacity 5.3.1 The cross-sectional area of every conductor size should

31、be such that its current carrying capacity is not less than the maximum sustained current which will normally flow through it. For the purposes of this standard, the limiting temperature to which the current carrying capacity is related should not exceed that appropriate to the maximum cable termina

32、tion operating temperature, the cable covering material, if any, or any material in contact with the cable. 5.3.2 The current carrying capacities of cables for fixed wiring, to meet the requirements of HD 384.5.523, are given in CENELEC Report R064-001. The values given have been determined such tha

33、t the limiting temperatures given in Table 1 of this standard are not exceeded under particular defined conditions where the cables are continuously loaded. For current ratings for other installed conditions the cable manufacturer should be consulted.BS 6207-3:2001 6 5.3.3 In the case of soft solder

34、ed conductor joints or connections the limiting temperature for the conductor under short circuit conditions is 160 C. Account of this limitation should be taken in selecting and operating cables. 5.3.4 Defined conditions include the method of installation of the cables used. Account should be taken

35、 of these conditions in determining the current carrying capacity of a cable. Correction factors for quoted current carrying capacities are available for particular conditions such as: a) ambient temperature; b) cable grouping; c) type of overcurrent protection; d) presence of thermal insulation. 5.

36、3.5 If cables are operated for prolonged periods at temperatures above those given in Table 1 then the cable terminations, covering or surrounding material may be damaged. 5.3.6 The selection of the cross-sectional area of any conductor should not be based on current carrying capacity alone; account

37、 should be taken of the influence of the requirements for protection against: a) electric shock; b) thermal effects; c) overload and short circuit currents; d) voltage drop; e) mechanical strength. 5.4 Thermal effects 5.4.1 The limiting temperatures of cables are given in Table 1. The values given s

38、hould not be exceeded by any combination of the heating effect of the current in the conductors and the ambient conditions. Particular account should be taken of the following: a) Cables in free air should not be so installed that the natural air convection is impeded. When cables are covered or emb

39、edded in thermal insulation or when the heat dissipation is impeded by other means, it is essential that the corresponding reduction of the current carrying capacity be observed.b) The temperature of cable sheaths can be significantly higher than the ambient temperatures, where the cables are subjec

40、ted to radiation, e.g. solar or infrared. Where these situations cannot be avoided their effect should be taken into account in assessing the current carrying capacity or the temperature of the cable relative to the limiting conditions.c) Account should be taken of the temperatures occurring within

41、equipment, appliances, luminaires and at their terminals, in selecting the types of termination to be used. 5.4.2 Cables should be selected, located and installed so that their intended heat dissipation is not inhibited and they do not present a fire hazard to adjacent materials. 5.4.3 In the event

42、of a fire, cables can provide a source of fuel and a means of propagating a fire along their length. This hazard may be eliminated by using bare copper sheathed mineral insulated cable. Where covered mineral cables are used the amount of combustible material is small and the hazard may be reduced by

43、 selecting a covering material with reduced flame propagation characteristics. Where a particular hazard exists or is likely to exist in the presence of explosive or flammable atmospheres, specific regulations apply. It is essential that the requirements of these regulations be taken into account in

44、 selecting the current carrying capacity and the type of cable termination to be used. 5.4.4 When the cable is installed not exposed to touch and the current is such that the cable sheath exceeds 70 C, the cable shall be bare copper and shall be so located or guarded as to prevent contact of persons

45、 or animals therewith and it shall not be in contact with combustible material. When installed in such conditions cable need not be derated when used in groups. 5.4.5 Cable terminations should be selected such that they are operated within the temperature limits specified by the manufacture.BS 6207-

46、3:2001 7 5.5 Mechanical stress 5.5.1 General In assessing risks of mechanical damage to cables account should be taken of mechanical strains likely to be imposed during the normal process of installation. 5.5.2 Tension The tension applied to a cable should not exceed 50 N/mm 2per conductor, subject

47、to a maximum of 1 000 N unless otherwise agreed by the cable manufacturer. 5.5.3 Bending The internal radius of every bend in a cable should not cause damage to the cable. a) The internal radius of every bend should not be less than six times the cable diameter; this will allow bends to be straighte

48、ned and repositioned. Bends with a smaller radius may be permitted provided that the bend is a once only bend that is not reworked; such bends should not be less than 3 times the cable diameter.b) Cables which are installed vertically, without intermediate support, which are inaccessible and unlikel

49、y to be disturbed, should be supported at the top of the run such that the internal radius of the resultant bend is not less than 6 times the cable diameter. 5.5.4 Compression Whilst mineral insulated cables possess significant resistance to compression and deformation, the installation and use of the cable should not be designed to make use of these characteristics. 5.6 Compatibility 5.6.1 The possibility of interference between adjacent circuits either mechanical or electrical should be avoided. The solid copper sheath of miner