1、BRITISH STANDARD BS 4553-1:1998 Incorporating Amendments Nos. 1 and 2 Specification for 600 /1 000 V single-phase split concentric electric cables Part 1: Cables having PVC insulation ICS 29.060.20 BS 4553-1:1998 This British Standard, having been prepared under the direction of the Electrotechnical
2、 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: Committee refer
3、ence GEL/20/2 Draft for comment 97/201035 DC ISBN 0 580 29574 5 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 following bod
4、ies 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 Comments 14
5、194 4 February 2004 See foreword 15641 29 April 2005 Certification text in foreword changedBS 4553-1:1998 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 Phase condu
6、ctor 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) Recommendations
7、 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 Annex F (
8、normative) Insulation resistance test 11 Annex G (normative) Compatibility test 11 Annex H (informative) Notes on type tests 12 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 PVC-insulated single-phase spli
9、t concentric cables with stranded copper phase conductors 8 Table 4 600 / 1 000 V PVC-insulated single-phase split concentric cables with solid aluminium phase conductors 8BS 4553-1:1998 ii BSI 29 April 2005 Foreword This British Standard has been prepared by Subcommittee GEL/20/2. It is one of thre
10、e parts of a full technical 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
11、!“. BS 4553-1 specifies the range of PVC insulated split concentric cables originally incorporated in BS 4553:1992. In addition, the standard now contains the option of solid aluminium conductors or stranded copper conductors, as well as the option of using a separate extruded bedding to build up th
12、e core to a diameter suitable for applying the split concentric layer. BS 4553-2 specifies a similar range of split concentric cables but which have thermosetting insulation. BS 4553-3 specifies a similar range of split concentric cables, but which have thermosetting insulation and non-halogenated s
13、heaths and a low emission of smoke and acid gas when affected by fire. 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
14、); Three phase Green-and-yellow (Earth); blue (Neutral); brown, black, 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 i
15、n this respect, but does not cover all installation conditions or cable uses. 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 Brit
16、ish Standard are advised to consider the desirability of third-party 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 a
17、ssociation. WARNING. This standard calls for the use of substances 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
18、, Annex E, Annex F and Annex G are normative. Annex A, Annex B, Annex C, Annex 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 its
19、elf confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 15 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.BS 4553-1:1998 BSI 29 April 2005
20、1 1 Scope This British Standard specifies requirements for construction and gives methods of test for PVC-insulated single-phase split concentric cables for operation on an earthed neutral system at nominal voltages up to and including 1 000 V between phases and 600 V to earth. The cables specified
21、in this part of BS 4553 have a central phase conductor insulated with PVC and a concentric layer comprising bare copper wires (earth continuity conductor) and copper wires covered with extruded polymer (neutral conductor). The cables are intended for use in fixed installations in industrial areas, b
22、uildings and similar applications. They are suitable for use in situations where the combination of ambient temperature and temperature rise due to loading current results in a conductor temperature not exceeding 70 C, and for a maximum short-circuit conductor temperature of 160 C. Guidance concerni
23、ng 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
24、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
25、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
26、materials for cables Section 3.1: Harmonized types. BS 7655-4.1, Specification for insulating and sheathing materials for cables Part 4: PVC sheathing compound Section 4.1: Harmonized types. !BS EN 50265-2-1, Common test methods for cables under fire conditions Test for resistance to vertical flame
27、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 determinin
28、g 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. 3 Definitions For the purposes of this British Standard the terms and definitions given in BS 4727-2-08 apply
29、, together with the following: 3.1 rated voltage U 0nominal 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 mmaximum sustained
30、 power-frequency voltage between phase conductors for which the cable is suitableBS 4553-1:1998 2 BSI 29 April 2005 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 measureme
31、nts taking into account specified tolerances. 3.5 approximate value value which is 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 co
32、mmercial basis, a type of cable covered by this standard, in order to demonstrate satisfactory 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,
33、design or type of manufacturing process which might change the performance characteristics. 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
34、 (symbol R) tests made on all production lengths to demonstrate their integrity 3.9 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
35、 form U 0 /U. The rated voltage recognized for the purposes of this standard is 600/1 000 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
36、either annealed copper or solid aluminium, as given in Table 3 or Table 4, and shall 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 conductor
37、s. The phase conductor shall be either circular or circular compacted stranded copper (class 2), or circular solid aluminium (class 1), as specified in Table 3 or Table 4. BS 4553-1:1998 BSI 29 April 2005 3 6 Insulation 6.1 General The insulation shall be PVC compound type TI 1 conforming to BS 7655
38、-3.1. The insulation shall be applied by the extrusion process to form a compact and homogeneous layer. 6.2 Thickness of insulation The thickness of insulation, when determined by taking the average of a number of measurements in accordance with Annex D, shall be not less than the value given in Tab
39、le 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 mm. 6.3 Spark testing of insulation The core insulation shall conform to the requirements for spark testing specified in BS 509
40、9 when tested in accordance with the a.c. or d.c. test methods specified in that standard. 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 colou
41、r brown either throughout the insulation or on its external surface. “ Conformity shall be 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 c
42、otton wool or cloth soaked in water. 8 Bedding NOTE In order to fit the layer of concentric 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 a
43、ppropriately such that the concentric wires fit around the insulated core. Any bedding shall 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 manufact
44、urer shall, where necessary, apply a suitable tape under the extruded bedding or, in the 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 manufact
45、ured from plain annealed solid copper wires. The number of wires and the resistance of the 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
46、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. “ The extruded polymeric compound, when tested in accordance with BS EN 60811-1-1, shall have a tensile strength of not less than 4 N/mm 2and an
47、 elongation at break of not less than 50 %. NOTE The covering should not be regarded as insulation. BS 4553-1:1998 4 BSI 29 April 2005 9.2 Earth continuity conductor The earth continuity conductor shall be manufactured from bare plain annealed solid copper wires. The number of wires and the resistan
48、ce of the earth continuity conductor when measured in accordance with 16.2, shall conform to the values given in Table 3 or Table 4. 9.3 String separators Non-hygroscopic string separators shall be approximately the same diameter as the individual bare wires forming the earth continuity conductor. 9
49、.4 Application of concentric layer The concentric layer shall be applied with either a right hand or left hand direction of lay. The wires forming the neutral conductor and earth continuity conductor shall be applied in individual groups over the insulation or bedding with string separators. Either one or two string separator(s) shall be located on either side of the group of bare copper wires to separate it from the group of covered wires. 10 Bind
