BS 2562-1979 Specification for cable boxes for transformers and reactors《变压器与电抗器用电缆箱规范》.pdf

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1、BRITISH STANDARD BS2562:1979 Specification for Cable boxes for transformers andreactors UDC 621.315.687:621.314.2+621.318.43BS2562:1979 This British Standard, having been prepared under the directionof the Power ElectricalEngineering StandardsCommittee, waspublished under the authorityof the Executi

2、ve Boardand comes intoeffecton 31December1979 BSI 06-1999 First published in Parts, as BS2562-1:1955 BS2562-2:1959 First published as one standard December1979 The following BSI references relate to the work on this standard: Committee reference PEL/113 Draft for comment74/28844DC ISBN 0 580 10831 7

3、 Cooperating organizations The Power Electrical Engineering Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee Associa

4、tion of Short Circuit Testing Authorities British Electrical and Allied Manufacturers Association (BEAMA) British Railways Board* British Steel Corporation Department of Energy (Electricity) Electrical Contractors Association Electrical Contractors Association of Scotland Electrical Research Associa

5、tion Electricity Supply industry in England and Wales* Engineering Equipment Users Association* Institute of Purchasing and Supply Institution of Electrical Engineers Ministry of Defence National Coal Board* National Economic Development Office The organizations marked with an asterisk in the above

6、list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Association of Consulting Engineers Bureau of Engineer Surveyors Electric Cable Makers Confederation London Transport Executive Transmission and Distribution Associa

7、tion (BEAMA) Amendments issued since publication Amd. No. Date of issue CommentsBS2562:1979 BSI 06-1999 i Contents Page Cooperating organizations Inside front cover Foreword iv Section 1. General 1 Scope 1 2 References 1 3 Definitions 1 Section 2. Performance and design requirements for cable boxes

8、4 Electrical requirements and clearances 2 5 Electromagnetic considerations 3 6 Provision for receiving cables 3 7 General design requirements 3 Section 3. Tests for cable boxes 8 Type tests 4 9 Routine tests 5 Section 4. Requirements for a range of single-pole, three-pole and four-pole cableboxes 1

9、0 Basis of range of boxes specified 5 11 Bushings 5 12 Cast resin bushing assemblies 6 13 Shell dimensions 7 Appendix A Information to be given with enquiry and order 50 Appendix B Wiping glands for metallic sheathed cables 50 Figure 1 Standard porcelains 20 Figure 2 Bushing clamps 21 Figure 3 Assem

10、bly of250A and400A porcelain bushingsforuseupto12kVrated voltage 22 Figure 4 Assembly of250A and400A epoxide resin bushingsforuseupto12kV rated voltage 23 Figure 5 Assembly of800A porcelain bushingforuseupto12kVratedvoltage 24 Figure 6 Assembly of800A epoxide resin bushingforuseupto12kVratedvoltage

11、25 Figure 7 Assembly of1 600A porcelain bushingforuseupto12kVratedvoltage 26 Figure 8 Assembly of1600A epoxide resin bushing for use up to12kV rated voltage 27 Figure 9 Assembly of2 500A porcelain bushing for use up to12kV rated voltage 28 Figure 10 Assembly of2 500A epoxide resin bushing for use up

12、 to12kV rated voltage 29 Figure 11 Assembly of250A porcelain bushing for use up to24kV rated voltage 30 Figure 12 Assembly of525A and800A porcelain bushings for use up to24kV rated voltage 31 Figure 13 Assembly of250A porcelain bushing for use up to36kV rated voltage 32 Figure 14 Assembly of800A por

13、celain bushing for use up to36kV rated voltage 33 Figure 15 Assembly of800A condenser bushing for use up to36kV rated voltage 34BS2562:1979 ii BSI 06-1999 Page Figure 16 800A and1 400A cast resin bushing assemblies for use up to1.1kV rated voltage 35 Figure 17 Bushing mounting plates for single-pole

14、 boxes (for use up to3.6kV rated voltage) 36 Figure 18 Bushing mounting plates for three-pole boxes (for use up to3.6kV rated voltage) 37 Figure 19 Bushing mounting plates for four-pole boxes (for use up to3.6kV rated voltage) 38 Figure 20 Copper based alloy bushing end caps, designations A, B, C an

15、d D 39 Figure 21 Copper based alloy cable connectors and ferrules 40 Figure 22 Copper based alloy bushing end caps, designations1to7 41 Figure 23 Facings for single-pole boxes 42 Figure 24 Facings for three-pole boxes 43 Figure 25 Facings for four-pole boxes 44 Figure 26 Typical arrangement of gland

16、 plate mounting for compound filled boxes 45 Figure 27 Assembly of filling orifice 46 Figure 28 Shell dimensions for filled boxes (for use up to12kV rated voltage) 47 Figure 29 Shell dimensions for filled boxes (for use at24kV and36kV rated voltage) 48 Figure 30 Shell dimensions for unfilled boxes w

17、ith cast resin bushingassemblies in accordance with Figure 16 for use up to1.1kVratedvoltage and individual bushing assemblies for use upto3.6kVrated voltage 49 Figure 31 Gland size X 52 Figure 32 Gland size Y 53 Figure 33 Gland size Z 54 Figure 34 Typical arrangement of uninsulated gland assembly t

18、ypes A and B 55 Figure 35 Moulded insulator for gland assembly types C2 and D2 56 Figure 36 Typical arrangement of insulated gland assembly(utilizingmoulded insulator) types C2 and D2 57 Figure 37 Insulation for gland assembly types C1, D1, E1 and F1 58 Figure 38 Typical arrangement of insulated gla

19、nd assembly (utilizinginsulating plate and bushes) types C1 and D1 59 Figure 39 Island layers for gland assembly types E1 and F1 60 Figure 40 Typical arrangement of insulated gland assembly with islandlayer(utilizing insulating plates and bushes) types E1 and F1 61 Figure 41 Armour clamps 62 Table 1

20、 Clearances 3 Table 2 Terminal stems and nuts 5 Table 3 Cable box ratings, shell dimensions and general particulars for filledboxes with porcelain bushings; single-pole boxes1.1kV to12kV 8 Table 4 Cable box ratings, shell dimensions and general particulars for filledboxes with porcelain bushings; th

21、ree-pole boxes1.1kV to12kV 9 Table 5 Cable box ratings, shell dimensions and general particulars for filledboxes with porcelain bushings; four-pole boxes1.1kV to12kV 11BS2562:1979 BSI 06-1999 iii Page Table 6 Cable box ratings, shell dimensions and general particularsforfilledboxes with porcelain bu

22、shings; single-pole and three-pole boxes24kV and36kV 13 Table 7 Cable box ratings, shell dimensions and general particulars for filledboxes with cast resin bushing assemblies; four-pole boxes1.1kV 14 Table 8 Cable box ratings, shell dimensions and general particulars forunfilled boxes with porcelain

23、 bushings; single-pole boxes1.1kV 14 Table 9 Cable box ratings, shell dimensions and general particulars for unfilled boxes with porcelain bushings; three-pole boxes1.1kV and3.6kV 15 Table 10 Cable box ratings, shell dimensions and general particulars for unfilled boxes with porcelain bushings; four

24、-pole boxes1.1kV and3.6kV 17 Table 11 Cable box ratings, shell dimensions and general particulars for unfilled boxes with cast resin bushing assemblies; four-pole boxes1.1kV 19 Table 12 Gland sizes 50 Publications referred to Inside back coverBS2562:1979 iv BSI 06-1999 Foreword This revision of BS25

25、62-1:1955andBS2562-2:1959combined has been prepared under the direction of the Power Electrical Engineering Standards Committee. It supersedes BS2562-1:1955 andBS2562-2:1959which are therefore withdrawn. As with the previous edition it is the intention that cable boxes which comply with the requirem

26、ents of this standard produced by different manufacturers shall be interchangeable. To assist replacements dimensions of certain components are specified. This standard is the metric version of BS2562-1:1955andBS2562-2:1959. The tolerances on dimensions at that time of publication were expected to b

27、e those of normal manufacturing practice, although this was not explicitly stated. The metric dimensions in this revision take this former practice into account. The metric dimensions given are such that cable boxes to the revised standard are interchangeable with those manufactured to the imperial

28、dimensions of the previous edition. 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. Summa

29、ry of pages This document comprises a front cover, an inside front cover, pagesi toiv, pages1to62, 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 table on the inside front co

30、ver.BS2562:1979 BSI 06-1999 1 Section 1. General 1 Scope This British Standard specifies requirements for cable boxes in which the cores of cables terminate within the box and are connected to terminals fixed therein. The boxes are intended for the termination of impregnated-paper-insulated solid-ty

31、pe lead or aluminium sheathed cables having copper or aluminium conductors and for the termination of extruded insulated and sheathed unarmoured cables having copper or aluminium conductors. The boxes are suitable for operating indoors or outdoors under conditions of ambient temperature, loading, al

32、titude, etc., envisaged by BS171. The standard box is arranged for cables approaching vertically from below and is not bi-directional. Where cables approach vertically from above, alternative parts are required (seeFigure 28). Details of the range of boxes are given in Table 3 to Table 11. The objec

33、tives of this standard are to specify standard envelope dimensions and fixing dimensions of cable boxes to achieve interchangeability whatever type of filling medium is to be used, and also to specify dimensions of components, e.g.bushings, glands, for interchangeability of such parts. The boxes are

34、 suitable for rated voltages up to36kV and currents up to2 500A. This standard does not purport to specify complete details of design and construction but some observations on these aspects are given in clause7. NOTEThis standard does not apply to boxes where the cable cores pass through to the tran

35、sformer without a joint or are joined to cable tails in the box by sleeves or thimbles. Section2 and 3 deal with design principles, general considerations and tests for a range of cable boxes up to and including36kV rated voltage. Section4 specifies the essential dimensions and component details for

36、 the range of cable boxes. Appendix A lists the information to be given with enquiry and order. Appendix B specifies wiping glands for metallic sheathed cables. 2 References The titles of the standards publications referred to in this standard are listed on the inside back cover. 3 Definitions For t

37、he purposes of this British Standard the following definitions apply. 3.1 cable box (Generally referred to in the text as a box.) a metallic box designed for the purposes of receiving and protecting the end of a cable or cables, and containing a suitable insulating medium where necessary so that the

38、 dielectric of the cable may be effectively sealed against the ingress of moisture a cable box may be arranged for one or more cables of either single or multicore construction and is complete with the requisite number of glands to provide entry for the cable or cables, and the necessary fittings to

39、 afford the connection between the cables and the terminals of the transformer NOTE 1An unfilled box is a box having air as the insulating medium. NOTE 2Boxes are defined by the numbers of poles and glands. 3.2 open-backed cable box a cable box generally as defined in3.1 except that the bushing asse

40、mblies defined in3.3 and3.4 or3.5, as appropriate, are detachable 3.3 bushing a structure carrying one or more conductors through a partition such as a wall or tank and insulating it therefrom, including the means of attachment (flange or other fixing device) to the partition. The conductor may be a

41、n integral part of the bushing or be drawn into the central tube of the bushing 3.4 bushing mounting plate a plate in which the bushings between the cable box and the transformer are mounted. It may be an integral part of the box or it may be a separate plate secured to the transformer tank by screw

42、ed studs which can also serve to secure an open-backed box shell 3.5 cast resin bushing assembly a bushing assembly, employing cast resin instead of porcelain as the insulating medium NOTEThe bushing assembly may be: a) a bushing only, as referred to in the note to11.1; b) a combined bushing and mou

43、nting plate, for one or more poles, cast as a single unit.BS2562:1979 2 BSI 06-1999 3.6 cable box shell the casing of a box, including the bushing mounting plate and the gland plate, but excluding the bushings, cable glands and armour clamps 3.7 open-backed cable box shell a cable box shell supplied

44、 without a bushing mounting plate 3.8 cable a length of single insulated conductor (solid or stranded) or two or more such conductors each provided with its own insulation which are laid up together. The insulated conductor or conductors may or may not be provided with an overall mechanical protecti

45、ve covering 3.9 metal sheathed cable a cable provided with a metal sheath for the purpose of excluding moisture from the conductors and insulation thereof 3.10 armoured cable a cable provided with a wrapping of metal (usually tape or wire) for the purpose of mechanical protection 3.11 number of pole

46、s the number of insulated conducting paths between the interior of the box and the transformer, which may be one, two, three or four dependent on the number of bushings 3.12 cable gland a device to seal and secure the sheath and to secure the armour of an electric cable, where provided, to the termi

47、nal equipment by means suitable for the type and description of cable for which it is designed, including provision for making electrical connection to the sheath and to the armour 3.13 cable wiping gland a cable gland having a wiping gland body 3.14 wiping gland body a non-ferrous metal bush to whi

48、ch the metal sheath of the cable is plumbed, to which the armour is clamped and which seals and secures the cable to the equipment 3.15 insulated wiping gland a wiping gland with insulation to insulate the metal sheath and armour of the cable from the equipment 3.16 island layer a metal insert betwe

49、en the cable box shell and the wiping gland body and insulated from both so as to provide an isolated reference point to enable the gland insulation to be tested after cable jointing has been completed 3.17 mechanical (compression) cable gland a non-ferrous bush which secures and seals the cable to the box by mechanical means 3.18 armour clamp a fitting for gripping the armour of a cable, at its termination, to the gland body 3.19 box base cleat an insulating cleat for