1、BSI Standards PublicationBS 3288-1:2014Insulator and conductorfittings for overhead powerlinesPart 1: Performance and generalrequirementsPublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the documentwas last issued. The British Standards Instituti
2、on 2014Published by BSI Standards Limited 2014ISBN 978 0 580 83132 4ICS 29.080.10; 29.120.20; 29.240.20The following BSI references relate to the work on this document:Committee reference PEL/11Draft for comment 14/30283902 DCPublication historyFirst published November 1960Second edition, October 19
3、73Third edition, March 1997Fourth (present) edition, December 2014Amendments issued since publicationDate Text affectedBS 3288-1:2014 BRITISH STANDARDContentsForeword ii1 Scope 12 Normative references 13 Terms and definitions 14 General requirements 35 Requirements for insulator pins 66 Insulator se
4、t fittings and earth conductor fittings 77 Tension joints and tension clamps 78 Non-tension joints 159 Suspension clamps 1910 Electrical control fittings 2111 Mechanical protective fittings 22AnnexesAnnex A (informative) Diagrammatic representation of electrical type testsequence 26Annex B (normativ
5、e) Mathematical acceptance criterion 26Annex C (informative) Information to be supplied by the purchaser 29Bibliography 30List of figuresFigure1Tension clamp and tension joints Mechanical damage and failureload test of the attachment point used during erection: diagram showing thetypical application
6、 of load 8Figure 2 Example of potential points 11Figure 3 Measuring electrical resistance between points 12Figure A.1 Diagrammatic representation of electrical type test sequence 26List of tablesTable1Tolerances 5Table 2 Longitudinal slip 24Table B.1 Designation of resistance measurements 27Summary
7、of pagesThis document comprises a front cover, an inside front cover, pages i to ii,pages 1 to 30, an inside back cover and a back cover.BRITISH STANDARD BS 3288-1:2014 The British Standards Institution 2014 iForewordPublishing informationThis part of BS 3288 is published by BSI Standards Limited, u
8、nder licence fromThe British Standards Institution, and came into effect on 31 December 2014. Itwas prepared by Technical Committee PEL/11, Overhead lines. A list oforganizations represented on this committee can be obtained on request to itssecretary.SupersessionThis part of BS 3288 supersedes BS 3
9、288-1:1997, which is withdrawn.Information about this documentBS 3288 applies primarily to fittings for overhead electric power lines. Thevarious parts of BS 3288 specify the performance, general requirements anddimensional requirements for insulator and conductor fittings. The general anddimensiona
10、l requirements may be applied to similar fittings used on overheadrailway electrification systems and in substations. This British Standard is notapplicable to fittings exclusively intended for use on aerial bundled conductorsystems or to low voltage connectors.BS 3288-1 is part of a series that con
11、tains the following current parts: Part 2: Specification for a range of fittings; Part 3: Dimensions of ball and socket couplings of string insulator units.The original suite of standards also contained BS 3288-4 but this has beensuperseded by BS EN 60372.Use of this documentIt has been assumed in t
12、he preparation of this part of BS 3288 that theexecution of its provisions will be entrusted to appropriately qualified andexperienced people, for whose use it has been produced.Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) type. Itsrequirements are
13、expressed in sentences in which the principal auxiliary verb is“shall”.Commentary, explanation and general informative material is presented insmaller italic type, and does not constitute a normative element.Requirements in this standard are drafted in accordance with Rules for thestructure and draf
14、ting of UK standards, subclause J.1.1, which states,“Requirements should be expressed using wording such as: When tested asdescribed in Annex A, the product shall .”. This means that only those productsthat are capable of passing the specified test will be deemed to conform to thisstandard.Contractu
15、al and legal considerationsThis publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legalobligations.BRITISH STANDARDBS 3288-1:2014ii The British Standards
16、Institution 20141 ScopeThis British Standard specifies performance and general requirements forinsulator and conductor fittings for use on overhead power lines. It defines therelevant tests and test procedures together with the acceptance criteria.The tests and test procedures may also be applied to
17、 similar fittings, outside thescope of this standard, intended for use in: the overhead equipment of electric traction lines; substations.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in thisdocument and are indispensable for its application. For date
18、d references, onlythe edition cited applies. For undated references, the latest edition of thereferenced document (including any amendments) applies.BS 3288-2, Insulator and conductor fittings for overhead power lines Part 2:Specification for a range of fittingsBS 3288-3, Insulator and conductor fit
19、tings for overhead power lines Part 3:Dimensions of ball and socket couplings for string insulator unitsBS 4727, Glossary of electrotechnical, power, telecommunications, electronics,lighting and colour termsBS 4872-1:1982, Specification for approval testing of welders when weldingprocedure is not re
20、quired Part 1: Fusion welding of steelBS EN 1562, Founding Malleable cast ironsBS EN 1563, Founding Spheroidal graphite cast ironsBS EN 60372:2004, Locking devices for ball and socket couplings of stringinsulator units Dimensions and testsBS EN 61284, Overhead lines Requirements and tests for fittin
21、gsBS EN ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles Specifications and test methodsBS EN ISO 15620, Welding Friction welding of metallic materialsPD 970, Wrought steels for mechanical and allied engineering purposes Requirements for carbon, carbon manganese and alloy
22、hot worked or coldfinished steels3 Terms and definitionsFor the purposes of this British Standard, the definitions given in BS 4727 andthe following apply.3.1 cap and pin insulatorinsulator comprising an insulating part having the form of a disc or bell, with orwithout ribs on its lower surface, and
23、 fixing devices consisting of an outside capand an inside pin attached axially3.2 clampany fitting which can be fixed onto a conductorBRITISH STANDARD BS 3288-1:2014 The British Standards Institution 2014 13.3 earth conductor fittingany component of an assembly for attaching an earth conductor to a
24、supportingstructure other than a suspension clamp, a tension termination or a mechanicalprotective fitting3.4 electrical control fittingany device for controlling the electrical characteristics of an insulator (i.e. arcinghorn, combined corona arcing device, etc.)3.5 factory formed helical conductor
25、 fittingfitting in which the force necessary to grip the conductor is provided by helicalwires which are self-tightening on the conductor3.6 insulator pinrigid fitting for attaching a pin insulator to a supporting structure3.7 insulator setassembly of one or more insulator strings suitably connected
26、 together, completewith fixing and protective devices as required in service3.8 insulator set fittingany component of a suspension or tension insulator set, other than a stringinsulator unit, a suspension clamp, a tension termination, an electrical controlfitting or a mechanical protective fitting3.
27、9 insulator stringone, or more than one string insulator units coupled together and intended togive flexible support to overhead line conductors and stressed mainly in tension3.10 long rod insulatorinsulator comprising an insulating part having an approximately cylindrical core,with or without sheds
28、, and external or internal fixing devices attached to eachend3.11 mechanical protective fittingany device attached to a conductor for its mechanical protection3.12 mid-span tension jointjoint inserted between two lengths of a conductor to provide electrical andmechanical continuity of the conductorN
29、OTE A dead end tension joint may additionally provide facilities for theconnection of droppers or jumpers. Some types, e.g. bolted and wedge type mightnot need this facility. The joint can also be used on an earth conductor.3.13 non-tension jointfitting for the connection of two consecutive pieces o
30、f conductor which are tobe held, but not at line tension3.14 non-tension T-jointfitting for the connection of the end of one conductor to a point on the lengthof a second conductorNOTE The connection is not subject to line tension although the conductor towhich the fitting is applied on its length m
31、ay be at line tension.BRITISH STANDARDBS 3288-1:20142 The British Standards Institution 20143.15 pin insulatorrigid insulator consisting of an insulating component intended to be mountedrigidly on a supporting structure by means of a pin passing up inside theinsulating component which consists of on
32、e or more pieces of insulatingmaterial permanently connected together3.16 repair sleevespecial fitting which can be installed over a damaged conductor in order torestore its electrical and mechanical properties3.17 rigid insulatorinsulator intended to give rigid support to an overhead line conductor
33、 andwhich is stressed mainly by bending and compressive loads3.18 spacerdevice which keeps apart the sub-conductors of a bundle in a given geometricalconfiguration3.19 specified minimum failing loadmechanical falling load specified by the purchaser or declared by the supplier asa design characterist
34、ic of the fitting3.20 string insulator unitcap and pin insulator or long rod insulator the fixing devices of which aresuitable for flexible attachment to other similar string insulator units or toconnecting accessories3.21 suspension clampfitting which attaches a conductor to a suspension insulator
35、set or an earthconductor fitting3.22 tension setinsulator set complete with all fittings and accessories to secure a conductor or abundle of conductors in tension3.23 vibration damperdevice attached to a conductor in order to suppress or minimize vibrations dueto wind4 General requirements4.1 Genera
36、lAll insulator fittings, unless otherwise specified by the purchaser see item b) ofAnnex C, shall conform to the coupling dimensions specified in BS 3288-3 andBS EN 60372.When conductor fittings are installed for test as specified in Clause 7,Clause 8 and Clause 9, the fittings shall not damage the
37、conductor except forany deformation necessary to attach the fitting. Fittings shall be made ofmaterial of sufficient ductility that the fittings can withstand the dynamicmechanical loads to which they are likely to be subjected in service. The fittingshall not give rise to the generation of visible
38、or audible corona discharge at thespecified test voltage.The selection of materials and the design of security devices shall conform toBS EN 60372:2004, 10.3.BRITISH STANDARD BS 3288-1:2014 The British Standards Institution 2014 34.2 Protection against corrosionAll parts of insulator, conductor and
39、earth wire fittings shall be either inherentlyresistant to atmospheric corrosion or be suitably protected against corrosion,such as can occur in transport, storage and in service. All ferrous parts which willbe exposed to the atmosphere in service, except those made of appropriatestainless steel, sh
40、all be protected by hot dip galvanizing in accordance withBS EN ISO 1461 or other means giving equivalent protection.Moreover, unless special measures are taken, there shall never be contactbetween metals for which the difference in electrochemical potential can giverise to galvanic corrosion capabl
41、e of impairing the efficiency of the wholeequipment.NOTE This applies especially to those parts of the fittings that are in direct contactwith the conductor.All external threads shall be cut or rolled before hot dip galvanizing.Internal threads can be cut before or after hot dip galvanizing but if c
42、ut aftergalvanizing, they shall be oiled or greased.4.3 Classification of testsIn the following clauses, in which the requirements for the various types offittings are given, the tests are divided into three groups:a) Type tests. Type tests are intended to establish design characteristics. Theyare n
43、ormally made once only and repeated only when the design or thematerial of the fitting is changed.b) Sample tests. Sample tests are intended to verify the quality of materialsand workmanship. They are made on fittings taken at random from batchesoffered for acceptance.c) Routine tests. Routine tests
44、 are intended to eliminate defective fittings.They are made on every fitting for which routine tests are specified in laterclauses.4.4 General requirements for testsCOMMENTARY ON 4.4Additional non-destructive testing may be agreed between purchaser and supplier.Tests might include: magnetic, eddy cu
45、rrent, radiograph, ultrasonic, proof load, dyepenetrant and hardness.4.4.1 Type testsTest certificates giving the results of the appropriate type tests, made on not lessthan three fittings identical in all essential details with those to be supplied,shall be regarded as evidence of conformity.NOTE I
46、f alternative arrangements apply, this should be stated by the purchaser atthe time of enquiry and order see item c) of Annex C.4.4.2 Sample testsWhen the order is for one hundred or more identical fittings, the number ofsamples for these tests shall be p or the nearest whole number greater than p,a
47、s given by the following formulae, in which n is the number of fittings in thebatch offered for inspection.p 5 4 when 100 n 20000For batches of fewer than one hundred identical fittings, four samples shall besubmitted to the specified non-destructive sample tests.The samples shall be selected at ran
48、dom from fittings which have passed theappropriate routine test (if any).NOTE 1 The purchaser has the right to make the selection.If these samples meet the test requirements, the batch shall be deemed toconform to the requirements of the standard. In the event of a sample notmeeting the test require
49、ments, twice the original number of new samples shallbe tested. If all these new samples meet the test requirements, the batch shallbe deemed to conform to the requirements of the standard, but if any fail to doso the batch shall be deemed not to conform to the requirements of thestandard.NOTE 2 Any sampling tests not defined in this standard should be agreed betweenthe purchaser and supplier.4.4.3 Routine testsWhere routine tests are specified in the following clauses, they shall be appliedto every fitting.4.5 Verification of dimen
