1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 6485:1999 ICS 29.060.2
2、0; 29.240.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW PVC-covered conductors for overhead power linesBS 6485:1999 This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards
3、 Committee and comes into effect on 15 February 1999 BSI 02-1999 First published April 1971 Second edition May 1990 Third edition February 1999 The following BSI references relate to the work on this standard: Committee reference GEL/20/2 Draft for comment 97/262300 DC ISBN 0 580 28254 6 Amendments
4、issued since publication Amd. No. Date Text affected 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 bodies were rep
5、resented: Association of Consulting Engineers British Approvals Service for Cables British Cable Makers Confederation British Plastics Federation ERA Technology Ltd. Electricity Association London Underground Ltd. UK Steel AssociationBS 6485:1999 BSI 02-1999 i Contents Page Committees responsible In
6、side front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Conductor 2 5 PVC covering 2 6 Schedule of tests 2 7 Test conditions 2 8 Routine tests 2 9 Sample tests 3 10 Type test 3 Annex A (normative) Test methods 4 Annex B (normative) Particulars of PVC-covered condu
7、ctors 5 Table 1 Schedule of tests 2 Table 2 Spark test voltage values 2 Table B.1 PVC-covered stranded hard-drawn copper conductors (Based on BS 7884) 5 Table B.2 PVC-covered stranded hard-drawn copper alloy conductors (Based on BS 7884) 5 Table B.3 PVC-covered aluminium stranded conductors (Based o
8、n BS 215-1) 6 Table B.4 PVC-covered aluminium conductors, steel reinforced (Based on BS 215-2) 6 Table B.5 PVC-covered aluminium alloy stranded conductors (Based on BS 3242) 7ii BSI 02-1999 BS 6485:1999 Foreword This new edition of BS 6485 has been prepared by Subcommittee GEL/20/2 and supersedes BS
9、 6485:1990 which is withdrawn. This edition has updated references mainly due to the withdrawal of BS 125:1970 and BS 2755:1970 which have been replaced by BS 7884:1997. This new edition incorporates technical changes. It does not represent a full review or revision of the standard, which will be un
10、dertaken in due course. Annexes A and B are normative. It has been assumed in the preparation of this British Standard that the execution of its provisions will be entrusted to appropriately qualified and experienced people, for whose use it has been produced. This British Standard calls for the use
11、 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. A British Standard does not purport to include all the nece
12、ssary 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. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages
13、 1 to 7 and a back cover. BSI 02-1999 1 BS 6485:1999 1 Scope This British Standard specifies requirements for PVC-covered conductors for overhead power lines. Two types of PVC-covered conductor have been standardized by the designation of minimum thickness of covering as follows: a) Type 8: 0.8 mm;
14、b) Type 16: 1.6 mm. Type 8 is intended for use only where the operating voltage of the power lines does not exceed 650 V r.m.s. between any two conductors or 250 V r.m.s. between any conductor and earth. Under these operating conditions, it is suitable for: a) crossings of telecommunication lines to
15、 guard against contact; b) proximities to telecommunication lines to guard against contact; c) lines (particularly service lines) accessible from buildings. Type 16 is intended for use only where the operating voltage of the power line exceeds 650 V r.m.s between any two conductors or 250 V r.m.s. b
16、etween any conductor and earth, but does not normally exceed 11 kV r.m.s. between conductors or 6.6 kV r.m.s. between any conductor and earth. The earthing of the neutral point of the system through an arc-suppression coil is not precluded, if arrangements exist for clearing earth faults without und
17、ue delay. Under these operating conditions, type 16 is suitable for crossings of telecommunication lines and proximities to them. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard. For dat
18、ed references, subsequent amendments to, or revisions of, any of these publications do not apply. For undated references, the latest edition of the publication referred to applies. BS 215-1, Specification for aluminium conductors and aluminium conductors, steel-reinforced for overhead power transmis
19、sion Part 1: Aluminium stranded conductors. BS 215-2, Specification for aluminium conductors and aluminium conductors, steel-reinforced for overhead power transmission Part 2: Aluminium conductors, steel-reinforced. BS 3242, Specification for aluminium alloy stranded conductors for overhead power tr
20、ansmission. BS 4727-2, Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms Part 2: Terms particular to power engineering Group 08: Electric cables. BS 5099, Specification for spark testing of electric cables. BS 7655-3.1, Specification for insulating and sh
21、eathing materials for cables Part 3: PVC insulating compounds Section 3.1: Harmonized types. BS 7884, Specification for copper and copper-cadmium stranded conductors for overhead electric traction and power transmission systems. BS EN 60811-1-1:1995, Insulating and sheathing materials of electric ca
22、bles Common test methods Part 1: General application Section 1: Measurement of thickness and overall dimensions. 3 Terms and definitions For the purposes of this British Standard, the definitions given in BS 4727-2:Group 08 apply, together with the following. 3.1 nominal value value by which a quant
23、ity is designated and which is often used in tables NOTE Usually, in this standard, nominal values give rise to values to be checked by measurements taking into account specified tolerances. 3.2 approximate value value which is only indicative NOTE Usually, in this standard, values described as “app
24、roximate” do not constitute requirements to be checked by measurements. 3.3 routine tests tests made by the manufacturer on each manufactured length of covered conductor to check that the whole of each length meets the specified requirements2 BSI 02-1999 BS 6485:1999 3.4 sample tests tests made by t
25、he manufacturer on samples of completed product or components taken from a completed product, at a specified frequency, so as to verify that the finished product meets the specified requirements 3.5 type tests tests made before supplying on a general commercial basis a type of product covered by thi
26、s standard in order to demonstrate satisfactory performance characteristics to meet the intended application NOTE 1 These tests are of such a nature that, after they have been made, they need not be repeated unless changes are made in the materials or design or manufacturing process which might chan
27、ge the performance characteristics. NOTE 2 Tests classified as routine or sample may be required as part of any type approval schemes. 4 Conductor The material, construction and physical properties of the conductor shall, after covering, conform to either BS 215, BS 3242, or BS 7884 for the bare con
28、ductor. The conductor sizes are specified in annex B. 5 PVC covering 5.1 Material The PVC covering shall conform to the type TI 1 compound requirements of BS 7655-3.1. 5.2 Colour The colour of the covering shall be as follows: a) Type 8: Black; b) Type 16: Green. NOTE The purchaser should consult th
29、e manufacturer when ordering green material for use in tropical countries. 5.3 Thickness of covering When tested in accordance with A.3 the thickness of the PVC covering at any point shall be not less than the appropriate value given below: a) Type 8: 0.8 mm; b) Type 16: 1.6 mm. 6 Schedule of tests
30、Testing shall be carried out in accordance with the schedule of tests given in Table 1. Table 1 Schedule of tests Test Clause reference Routine tests Spark test 8.2 High voltage test (Type 16 only) 8.3 Conductor resistance 8.4 Insulation resistance test (Type 16 only) 8.5 Sample tests Thickness of P
31、VC covering 5.3 Conductor examination and test 9.2 Type test PVC material 5.1 7 Test conditions 7.1 Ambient temperature Tests shall be made at ambient temperature within the range 58Ct o3 58 C unless otherwise specified in the details of the particular test. 7.2 Frequency and waveform of power frequ
32、ency test voltages Unless otherwise specified, alternating test voltages shall have a frequency between 49 Hz and 61 Hz. The waveform shall be substantially sinusoidal. 8 Routine tests 8.1 General Routine tests shall be as given in Table 1. 8.2 Spark test When the PVC covering is tested in accordanc
33、e with BS 5099, applying the voltage given in Table 2, no breakdown shall occur. Table 2 Spark test voltage values Designation Test voltage kV a.c. (r.m.s.) d.c. Type 8 6 9 Type 16 12 18 BSI 02-1999 3 BS 6485:1999 8.3 High voltage test (Type 16 only) When tested in accordance with A.1 no breakdown o
34、f the PVC covering shall occur. 8.4 Conductor resistance The d.c. resistance of hard-drawn copper and hard-drawn copper-cadmium conductors shall be measured in accordance with BS 7884 and corrected to 208C in accordance with that standard. The results shall not exceed the appropriate maximum values
35、given in Tables B.1 and B.2. 8.5 Insulation resistance test (Type 16 only) When tested in accordance with A.2 the insulation resistance shall be greater than 0.5 MV/km. 9 Sample tests 9.1 General Sample tests shall be as given in Table 1. 9.2 Conductor examination and test When examined and tested i
36、n accordance with the appropriate British Standard from those listed in clause 4, the conductor shall conform to the requirements of that standard. 10 Type test The type test shall be as given in Table 1.BS 6485:1999 4 BSI 02-1999 Annex A (normative) Test methods A.1 High voltage test (type 16 only)
37、 Cut a sample of PVC-covered conductor not less than 1 m long from each manufactured drum length. Immerse the sample in water for at least 24 h, and whilst it is still immersed apply 25 kV (r.m.s.) between the conductor and the water, the latter being earthed. Raise the voltage gradually and maintai
38、n at the full value for 5 min. A.2 Insulation resistance test (type 16 only) Cut a sample of PVC-covered conductor not less than 10 m long from each manufactured drum length. Immerse the sample in water at ambient temperature for at least 4 h. Measure the insulation resistance between the conductor
39、and the water after steady electrification for 1 min using a voltage of between 80 V and 500 V d.c. A.3 Thickness of PVC coating Take a representative sample of the PVC-covered conductor, approximately 300 mm long, not less than 300 mm from the end of the selected drum lengths. At three different se
40、ctions not less than 100 mm apart measure the thickness of the covering in accordance with BS EN 60811-1-1:1995, 8.1. BSI 02-1999 5 BS 6485:1999 Annex B (normative) Particulars of PVC-covered conductors NOTE Additional information may be obtained by direct reference to the British Standard designate
41、d in each table. Table B.1 PVC-covered stranded hard-drawn copper conductors (Based on BS 7884) 1 23456789 Nominal cross-sectional area Stranding and wire diameter Approximate overall diameter of bare conductor Maximum resistance per kilometre at 208C Approximate breaking load Approximate overall di
42、ameter of covered conductor Approximate mass per kilometre of covered conductor Type 8 Type 16 Type 8 Type 16 mm 2 mm mm V kN mm mm kg kg 14 7/1.60 4.80 1.303 5.744 6.8 8.4 160 190 16 3/2.65 5.70 1.106 6.590 7.7 9.3 180 220 32 3/3.75 8.06 0.5520 12.71 10.5 12.1 350 390 35 7/2.50 7.50 0.5337 14.097 9
43、.9 11.5 360 400 70 7/3.55 10.65 0.2646 26.88 13.5 14.7 690 750 100 7/4.30 12.90 0.1810 37.64 15.7 16.9 990 1 060 Table B.2 PVC-covered stranded hard-drawn copper alloy conductors (Based on BS 7884) 1234567 Nominal cross-sectional area Stranding and wire diameter Approximate overall diameter of bare
44、conductor Maximum resistance per kilometre at 208C Approximate breaking load Approximate overall diameter of covered conductor Approximate mass per kilometre of covered conductor Type 16 Type 16 mm 2 mm mm V kN mm kg 12 3/2.30 4.95 1.780 7.20 8.2 170 22 7/2.00 6.00 1.011 12.94 9.6 270 38 7/2.60 7.80
45、 0.5983 21.69 11.8 430 75 7/3.70 11.10 0.2954 40.23 15.1 810 125 19/2.90 14.50 0.1784 68.75 18.5 1 310 150 19/3.20 16.00 0.1465 82.16 20.0 1 5706 BSI 02-1999 BS 6485:1999 Table B.3 PVC-covered aluminium stranded conductors (Based on BS 215-1) 1234567 Nominal cross-sectional area Stranding and wire d
46、iameter Approximate overall diameter of bare conductor Calculated resistance per kilometre at 208C Approximate breaking load Approximate overall diameter of covered conductor Approximate mass per kilometre of covered conductor Type 8 Type 8 mm 2 mm mm V kN mm kg 22 7/2.06 6.18 1.227 3.99 8.2 100 50
47、7/3.10 9.30 0.5419 8.28 11.7 200 100 7/4.39 13.17 0.2702 16.00 16.0 360 200 19/3.78 18.90 0.1349 32.40 21.7 690 Table B.4 PVC-covered aluminium conductors, steel reinforced (Based on BS 215-2) 12345678 Nominal cross-sectional area Stranding and wire diameter Approximate overall diameter of bare cond
48、uctor Calculated resistance per kilometre at 208C Approximate breaking load Approximate overall diameter of covered conductor Approximate mass per kilometre of covered conductor Aluminium Steel Type 16 Type 16 mm 2 mm mm mm V kN mm kg 25 6/2.36 1/2.36 7.08 1.093 9.61 10.7 190 50 6/3.35 1/3.35 10.05
49、0.5426 18.35 14.1 330 100 6/4.72 7/1.57 14.15 0.2733 32.70 18.2 550 150 30/2.59 7/2.59 18.13 0.1828 69.20 22.2 920 150 18/3.35 1/3.35 16.75 0.1815 35.70 20.8 680 175 30/2.79 7/2.79 19.53 0.1576 79.80 23.6 1 050 175 18/3.61 1/3.61 18.05 0.1563 41.10 22.1 780 200 30/3.00 7/3.00 21.00 0.1363 92.25 25.0 1 190 200 18/3.86 1/3.86 19.30 0.1367 46.55 23.3 870 BSI 02-1999 7 BS 6485:1999 Table B.5 PVC-covered aluminium alloy stranded conductors (Based on BS 3242) 1234567 Nominal cross-sectional area Stranding and wire diameter Approximate over
