1、BRITISH STANDARD BS 4553-2:1998 Incorporating Amendments Nos. 1 and 2 Specification for 600/1 000 V single-phase split concentric electric cables Part 2: Cables having thermosetting insulation ICS 29.060.20 BS 4553-2:1998 This British Standard, having been prepared under the direction of the Electro
2、technical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 August 1998 BSI 29 April 2005 First published, February 1970 Second edition, January 1988 Third edition, February 1992 The following BSI references relate to the work on this standard: Commit
3、tee reference GEL/20/2 Draft for comment 97/201035 DC ISBN 0 580 29575 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee GEL/20, Electric cables, to Subcommittee GEL/20/2, Mains cables, 1 kV and above, upon which the foll
4、owing bodies were represented: Association of Consulting Engineers British Approvals Service for Cables British Cables Association British Plastics Federation Electricity Association ERA Technology Ltd. London Underground Ltd. UK Steel Association Amendments issued since publication Amd. No. Date Co
5、mments 14193 5 February 2004 See foreword 15642 29 April 2005 Certification text in foreword changedBS 4553-2:1998 BSI 29 April 2005 i Contents Page Committees responsible Inside front cover Foreword ii 1S c o p e 1 2 Normative references 1 3 Definitions 1 4V o l t a g e d e s i g n a t i o n 2 5 Ph
6、ase conductor 2 6I n s u l a t i o n 3 7 Identification of phase core 3 8B e d d i n g 3 9 Concentric layer 3 10 Binders 4 11 Oversheath 4 12 Cable marking 4 13 End sealing 5 14 Schedule of tests 5 15 Test conditions 6 16 Routine tests 6 17 Sample tests 6 18 Type tests 6 Annex A (informative) Recomm
7、endations for the selection and operation of cables 9 Annex B (informative) Recommendations for installation of cables 9 Annex C (informative) Information to be provided with enquiry or order 10 Annex D (normative) Measurement of thickness 11 Annex E (normative) Voltage tests on completed cables 11
8、Annex F (Spare) 11 Annex G (normative) Compatibility test 11 Annex H (informative) Notes on type tests 11 Annex J (informative) Guide to use 12 Bibliography 15 Table 1 Schedule of tests 7 Table 2 Compatibility requirements 8 Table 3 600 / 1 000 V XLPE-insulated single-phase split concentric cables w
9、ith stranded copper phase conductors 8 Table 4 600 / 1 000 V XLPE-insulated single-phase split concentric cables with solid aluminium phase conductors 8BS 4553-2:1998 ii BSI 29 April 2005 Foreword This British Standard has been prepared by Subcommittee GEL/20/2. It is one of three parts of a full te
10、chnical revision of BS 4553:1992, which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Tags indicating changes to text carry the number of the amendment. For example, text altered by amendment No. 1 is indicated by !“. BS 4553-2 spe
11、cifies a range of thermosetting insulated split concentric cables. In addition, the standard contains the option of solid aluminium conductors or stranded copper conductors, as well as option of using a separate extruded bedding to build up the core to a diameter suitable for applying the split conc
12、entric layer. BS 4553-1 specifies a similar range of split concentric cables but which have PVC insulation. BS 4553-3 specifies a similar range of split concentric cables but which have thermosetting insulation and non-halogenated sheaths and a low emission of smoke and acid gas when affected by fir
13、e. Amendment No. 1:2004 implements the changes to the identification of cores by colours, in accordance with HD 308 S2. The principal identification colours are now: Single phase Green-and-yellow (Earth); blue (Neutral); brown (Live); Three phase Green-and-yellow (Earth); blue (Neutral); brown, blac
14、k, grey (Live). Users should ensure that any interconnection between cables with these new colours and those with the pre-existing ones is carried out safely. BS 7671, as amended in parallel with this standard, gives some guidance in this respect, but does not cover all installation conditions or ca
15、ble users. The provisions introduced by amendment No. 1:2004 are effective from 1 stApril 2004. The original version of this standard remains current until 31 stMarch 2006. Product certification/inspection/testing. Users of this British Standard are advised to consider the desirability of third-part
16、y certification/inspection/testing of product conformity with this British Standard. Users seeking assistance in identifying appropriate conformity assessment bodies or schemes may ask BSI to forward their enquiries to the relevant association. WARNING. This standard calls for the use of substances
17、and/or procedures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. Annex D, Annex E and Annex G are normative. Annex A, Annex B, Annex C, Ann
18、ex H and Annex J are informative. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document c
19、omprises a front cover, an inside front cover, pages i and ii, pages 1 to 15 and a back cover. BS 4553-2:1998 BSI 29 April 2005 1 1 Scope This British Standard specifies requirements for construction and gives methods of test for XLPE-insulated single-phase split concentric cables for operation on a
20、n earthed neutral system at nominal voltages up to and including 1 000 V between phases and 600 V to earth. The cables specified in this part of BS 4553 have a central phase conductor insulated with XLPE and a concentric layer comprising bare copper wires (earth continuity conductor) and copper wire
21、s covered with extruded polymer (neutral conductor). The cables are intended for use in fixed installations in industrial areas, buildings and similar applications. They are suitable for use in situations where the combination of ambient temperature and temperature rise due to loading current result
22、s in a conductor temperature not exceeding 90 C and for a maximum short-circuit conductor temperature of 250 C. NOTE 1 Limitation on the temperature of the cables may be imposed in situations where they may be touched. NOTE 2 Due to the relatively high conductor temperature, there is a risk of dryin
23、g out the surrounding soil causing an increase in thermal resistivity which in turn would lead to the cable temperature rising to a higher value than anticipated. For cable laid directly in the ground, a suitable de-rating factor should be applied or a lower maximum sustained conductor operating tem
24、perature should be assumed to take into account the possible effects of soil drying out. NOTE 3 In installations which include cable joints and terminations, the performance of these accessories should be taken into account in deciding the maximum operating temperature of the cable. Guidance concern
25、ing selection, installation and usage is given in Annex A, Annex B and Annex J respectively. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of this British Standard. For dated references, subsequen
26、t amendments to, or revisions of, any of these publications do not apply. For undated references, the latest edition of the publication referred to applies. !Text deleted. “ BS 4727-2-08, Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms Part 2: Terms par
27、ticular to power engineering Group 08: Electric cables. BS 5099, Specification for spark testing of electric cables. BS 6360, Specification for conductors in insulated cables and cords. BS 7655-3.1, Specification for insulating and sheathing materials for cables Part 3: PVC insulating and sheathing
28、materials for cables Section 3.1: Harmonized types. BS 7655-4.2, Specification for insulating and sheathing materials for cables Part 4: PVC sheathing compound Section 4.2: General application. !BS EN 50265-2-1, Common test methods for cables under fire conditions Test for resistance to vertical fla
29、me propagation for a single insulated conductor or cable Part 2-1: Procedures 1 kW pre-mixed flame. “ BS EN 60811-1-1, Insulating and sheathing materials of electric cables. Common test methods Part 1: General application Section 1-1: Measurement of thickness and overall dimensions. Tests for determ
30、ining the mechanical properties. BS EN 60811-1-2:1995, Insulating and sheathing materials of electric cables. Common test methods Part 1: General application Section 1-2: Thermal ageing methods. BS EN 60811-1-3, Insulating and sheathing materials of electric cables. Common test methods Part 1: Gener
31、al application Section 1-3: Methods for determining the density. Water absorption tests. Shrinkage test. 3 Definitions For the purposes of this British Standard the terms and definitions given in BS 4727-2-08 apply, together with the following: BS 4553-2:1998 2 BSI 29 April 2005 3.1 rated voltage U
32、0 nominal power-frequency voltage between phase conductor and earth, for which the cable is suitable 3.2 rated voltage U nominal power-frequency voltage between phase conductors for which the cable is suitable 3.3 maximum voltage U m maximum sustained power-frequency voltage between phase conductors
33、 for which the cable is suitable 3.4 nominal value value by which a quantity is designated and which is often used in tables NOTE In this standard, nominal values usually give rise to values to be checked by measurements taking into account specified tolerances. 3.5 approximate value value which is
34、only indicative NOTE In this standard, values described as approximate do not constitute requirements to be checked by measurement. 3.6 type tests (symbol T) tests required to be made before supplying, on a general commercial basis, a type of cable covered by this standard, in order to demonstrate s
35、atisfactory performance characteristics to meet the intended application NOTE These tests are of such a nature that, after they have been made, they need not be repeated unless changes are made in the cable material, design or type of manufacturing process which might change the performance characte
36、ristics. 3.7 sample tests (symbol S) tests made on samples of completed cable, or components taken from a completed cable adequate to verify that the finished product meets the design specifications 3.8 routine tests (symbol R) tests made on all production lengths to demonstrate their integrity 3.9
37、tests after installation tests intended to demonstrate the integrity of the cable and its accessories as installed 4 Voltage designation The cables shall be designated by the rated voltages U 0and U, expressed in the form U 0 /U. The rated voltage recognized for the purposes of this standard is 600/
38、1 000 V. The maximum designated voltage (U m ) for the purposes of this standard is 1 200 V. NOTE Guidance on the selection and operation of cables is given in Annex A. 5 Phase conductor The phase conductor shall be either annealed copper or solid aluminium, as given in Table 3 or Table 4, and shall
39、 conform to the requirements detailed in Table 1 and to BS 6360. Where the manufacturer deems it necessary to use tinned copper conductors, they shall conform to the requirements of BS 6360 for metal coated conductors. BS 4553-2:1998 BSI 29 April 2005 3 The phase conductor shall be either circular o
40、r circular compacted stranded copper (class 2), or circular solid aluminium (class 1) as specified in Table 3 or Table 4. 6 Insulation 6.1 General The insulation shall be cross-linked polyethylene compound GP 8 conforming to BS 7655-1.3. The insulation shall be applied by the extrusion process to fo
41、rm a compact and homogeneous layer. The manufacturer shall, where necessary to meet the compatibility requirements specified in 18.2, apply a protective barrier between the conductor and the insulation and/or over the insulation. 6.2 Thickness of insulation The thickness of insulation, when determin
42、ed by taking the average of a number of measurements in accordance with Annex D, shall be not less than the value given in Table 3 or Table 4, as appropriate, and the smallest of the measured values shall not fall below the value given in Table 3 or Table 4, as appropriate, by more than 10 % + 0.1 m
43、m. Any optional protective barrier (see 6.1) shall not be included in this measurement. 6.3 Spark testing of insulation The core insulation shall conform to the requirements for spark testing specified in BS 5099 when tested in accordance with the a.c. or d.c. test methods specified in that standard
44、 The voltage levels shall be determined by reference to the value of insulation thickness given in Table 3 or Table 4. 7 Identification of phase core 7.1 General !The phase core shall be identified by the colour brown either throughout the insulation or on its external surface. “ Conformity shall b
45、e checked by visual examination. 7.2 Clarity and durability The colour used for core identification shall be clearly identifiable and durable such that it cannot be removed when rubbed 10 times with a piece of cotton wool or cloth soaked in water. 8 Bedding NOTE In order to fit the layer of concentr
46、ic wires around the core, the diameter of the core may be built up by applying an extruded layer of bedding material. As an alternative to applying a separate bedding, the insulation thickness may be increased appropriately such that the concentric wires fit around the insulated core. Any bedding sh
47、all be an extruded polymeric compound, which, when tested in accordance with BS EN 60811-1-1, shall have a tensile strength of not less than 4 N/mm 2and an elongation at break of not less than 50 %. The manufacturer shall, where necessary, apply a suitable tape under the extruded bedding or, in the
48、absence of a bedding, over the insulation. It shall be possible to remove the bedding without damaging the insulation of the core. 9 Concentric layer 9.1 Neutral conductor The neutral conductor shall be manufactured from plain annealed solid copper wires. The number of wires and the resistance of th
49、e neutral conductor, when measured in accordance with 16.2, shall conform to the values given in Table 3 or Table 4. !To distinguish the neutral conductor from the earth continuity conductor each wire shall be covered by extrusion with a blue polymeric compound to a diameter approximately the same as that of the individual wires in the earth continuity conductor. “BS 4553-2:1998 4 BSI 29 April 2005 The extruded polymeric compound, when tested in
