1、BSI Standards PublicationBS 6867:2013Maintenance of electricalswitchgear and controlgearfor voltages above 36 kV Code of practicePublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the documentwas last issued. The British Standards Institution 2013P
2、ublished by BSI Standards Limited 2013ISBN 978 0 580 61300 5ICS 29.130.10The following BSI references relate to the work on this document:Committee reference PEL/17/1Draft for comment 13/30174947 DCPublication historyFirst published October 1987Second (present) edition, September 2013Amendments issu
3、ed since publicationDate Text affectedBS 6867:2013 BRITISH STANDARDContentsForeword iiiSection 1: General 11 Scope 12 Normative references 13 Terms and definitions 14 Maintenance policy 35 Operational policy 46 Competence 4Section 2: Safety 57 Personal protective equipment and treatment of persons s
4、uffering fromelectric shock 58 Operational experience 59 Safety rules and procedures for safe systems of work 510 Equipment location 611 Isolation and access for maintenance 612 Preparing for maintenance work 813 Fire extinguishing equipment 814 Testing 915 Disposal of scrap 9Section 3: Common recom
5、mendations relating to maintenance 1016 Manufacturers instructions 1017 Newly commissioned equipment 1018 Frequency of maintenance 1019 Records and drawings 1320 Replacement parts 1421 Cleanliness 1522 Marking of covers and connections 1523 Quality of connections 1524 Maintenance and testing of insu
6、lation 1625 Maintenance of safety earthing continuity 2026 Shutters, locking devices, etc. 2027 Interlocks 2028 Ventilation 2129 Equipment heating and lighting 2130 Lifting devices 2131 Mechanisms 2232 Tripping and closing supplies 2433 Equipment tools, spares and test instruments 2434 Conclusion of
7、 maintenance 24Section 4: Additional recommendations relating to the maintenance of specificitems 2535 Circuit breakers 2536 Switches and switch disconnectors 4037 Disconnectors and earthing switches 4038 Busbars and busbar chambers 4039 Relays 4140 Protective, measuring and control transformers 424
8、1 Cable boxes and terminations 4442 Compressed air plant 4443 Ancillary and auxiliary circuits 4444 Capacitive charged motor drive mechanisms 44BRITISH STANDARD BS 6867:2013 The British Standards Institution 2013 iAnnexesAnnex A (informative) Statutory requirements and related documents 45Annex B (i
9、nformative) Example of items to be covered in safety rules 46Bibliography 52List of tablesTable 1 Recommended test voltages 16Table 2 Maintenance of ancillary and auxillary circuits 44Summary of pagesThis document comprises a front cover, an inside front cover, pages i to iv,pages 1 to 54, an inside
10、 back cover and a back cover.BRITISH STANDARDBS 6867:2013ii The British Standards Institution 2013ForewordPublishing informationThis British Standard is published by BSI Standards Limited, under license fromthe British Standards Institution and came into effect on 30 September 2013. Itwas prepared b
11、y Subcommittee PEL/17/1, High-voltage switchgear andcontrolgear, under the authority of Technical Committee PEL/17, High-voltageswitchgear and controlgear and HV-LV co-ordination. A list of organizationsrepresented on these committees can be obtained on request to their secretary.SupersessionThis Br
12、itish Standard supersedes BS 6867:1987, which is withdrawn.Information about this documentThis is a full revision of the standard, and introduces the following principalchanges. The various types of maintenance approach are discussed, includingpreventative and condition based maintenance. Maintenanc
13、e policies using PAS 55 philosophy have been introduced. Maintenance considerations for modern plant and equipment, like gasinsulated switchgear (GIS) and capacitive charged motor drive mechanisms,have been added. The standard has been restructured to create a dedicated clause onmechanisms (Clause 3
14、1). Text on use and handling of sulphur hexafluoride has been brought up todate. Recommendations for hard-gas interrupters are not given.The purpose of this British Standard is to provide, in a convenient form,recommendations and guidance on those matters which technical knowledgeand experience have
15、 shown to be important in keeping electrical switchgear andcontrolgear in an acceptable condition. It is intended for the guidance of thoseactually carrying out the maintenance work, as well as for administrativepersonnel.The normally quiescent state of electrical switchgear and some controlgear doe
16、snot automatically draw attention to incipient faults, deterioration or dangerresulting from neglect and the consequent need for maintenance. It follows,therefore, that an organized system of maintenance is important to facilitatecontinued safe and acceptable operation of an electrical system with t
17、heminimum risk of failure and consequent interruption of supply.Use of this documentAs a code of practice, this British Standard takes the form of guidance andrecommendations. It should not be quoted as if it were a specification andparticular care should be taken to ensure that claims of compliance
18、 are notmisleading.Any user claiming compliance with this British Standard is expected to be able tojustify any course of action that deviates from its recommendations.It has been assumed in the preparation of this British Standard that theexecution of its provisions will be entrusted to appropriate
19、ly qualified andexperienced people, for whose use it has been produced.BRITISH STANDARD BS 6867:2013 The British Standards Institution 2013 iiiHazard warningsWARNING. Older switchgear might contain asbestos. Attention is drawn tothe Control of Asbestos Regulations 2012.Presentational conventionsThe
20、provisions in this standard are presented in roman (i.e. upright) type. Itsrecommendations are expressed in sentences in which the principal auxiliaryverb is “should”.Commentary, explanation and general informative material is presented insmaller italic type, and does not constitute a normative elem
21、ent.Contractual 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.In particular attention is drawn to the st
22、atutory regulations listed in Annex A.BRITISH STANDARDBS 6867:2013iv The British Standards Institution 2013Section 1: General1 ScopeThis British Standard gives recommendations and guidance for the maintenanceof electrical switchgear and controlgear having a rated a.c. or d.c. voltageabove 36 kV.NOTE
23、 This standard is not applicable to explosion protected switchgear andcontrolgear. Inspection and maintenance of electrical apparatus in explosive gasatmospheres is covered in BS EN 60079-17.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in thisdocumen
24、t and are indispensable for its application. For dated references, onlythe edition cited applies. For undated references, the latest edition of thereferenced document (including any amendments) applies.BS 6423:1983+A1:1992, Code of practice for maintenance of electrical switchgearand controlgear for
25、 voltages up to and including 1 kVBS EN 13306:2010, Maintenance Maintenance terminologyBS EN 50110-1:2013, Operation of electrical installations Part 1: GeneralrequirementsBS EN 60422, Mineral insulating oils in electrical equipment Supervision andmaintenance guidanceBS EN 60480, Guidelines for the
26、checking and treatment of sulphur hexafluoride(SF6) taken from electrical equipment and specification for its re-usePD CLC/TR 62271-303, High voltage switchgear and controlgear Part 303: Useand handling of sulphur hexafluoride (SF6)3 Terms and definitionsFor the purposes of this British Standard the
27、 terms and definitions given inBS EN 13306:2010, BS EN 50110-1:2013 and the following apply.3.1 acceptable conditioncondition in which an item is able to meet the requirements of the relevantspecification and perform its required functions3.2 controlgeara general term covering switching devices and
28、their combination with associatedcontrol, measuring, protective and regulating equipment, also assemblies of suchdevices and equipment with associated interconnections, accessories, enclosuresand supporting structures, intended in principle for the control of electricenergy consuming equipment IEC 6
29、0050-441:1984+A1, 441-11-033.3 dead workingwork activity on electrical installations, which are neither live nor charged,carried out after having taken all measures to prevent electrical dangerBS EN 50110-1:2013, 3.4.83.4 diagnostic testcomparative measurement carried out to monitor the condition of
30、 an itemBRITISH STANDARD BS 6867:2013 The British Standards Institution 2013 13.5 examinationinspection with the addition of partial dismantling as required, supplemented bymeans such as measurement and non-destructive tests in order to arrive at areliable conclusion as to the condition of an item3.
31、6 failuretermination of the ability of an item to perform a required functionBS EN 13306:2010, 5.1NOTE Failure can be gradual or sudden and partial or complete.3.7 high voltagevoltage in excess of 1 kV3.8 inspectionexamination for conformity by measuring, observing, or testing the relevantcharacteri
32、stics of an item BS EN 13306:2010, 8.13.9 itempart, component, device, subsystem, functional unit, equipment or system thatcan be individually described and considered BS EN 13306:2010, 3.13.10 live workingall work in which a worker deliberately makes contact with live parts or reachesinto the live
33、working zone with either parts of his or her body or with tools,equipment or devices being handled BS EN 50110-1:2013, 3.4.43.11 low-maintenance equipmentequipment designed not to require frequent maintenance and, except whensubject to very frequent operation, intended to need minimal examination or
34、overhaul during the economic life of the equipment3.12 maintenancecombination of actions carried out to retain an item in, or restore it to, anacceptable condition3.13 manufacturers handbookwritten information issued by the manufacturer of the equipment whichincludes guidance and instructions concer
35、ning installation, commissioning,operation and maintenance of the equipment3.14 non-routine maintenanceunplanned maintenance which is not the result of a failure3.15 operational checkaction carried out to determine whether an item functions correctly3.16 overhaulcomprehensive set of preventive maint
36、enance actions carried out in order tomaintain the required level of performance of an itemNOTE 1 Overhaul may be performed at prescribed intervals of time or number ofoperations.NOTE 2 Overhaul may require a complete or partial dismantling of the item.BS EN 13306:2010, 8.63.17 post-fault maintenanc
37、emaintenance which might be necessary after a specified number of faultclearance or making operationsBRITISH STANDARDBS 6867:20132 The British Standards Institution 20133.18 preventive maintenancemaintenance carried out with the objective of preventing failureNOTE It may include routine or non-routi
38、ne maintenance.3.19 routine maintenancemaintenance organized and carried out in accordance with a predeterminedpolicy or plan to prevent failure or decide the likelihood of an item failing to bein an acceptable condition3.20 servicingwork carried out to ensure that the equipment is kept in an accept
39、ablecondition, which usually does not involve any dismantling, and is typicallylimited to cleaning, adjustment and lubrication3.21 switchgeara general term covering switching devices and their combination with associatedcontrol, measuring, protective and regulating equipment, also assemblies of such
40、devices and equipment with associated interconnections, accessories, enclosuresand supporting structures, intended in principle for use in connection withgeneration, transmission, distribution and conversion of electric energyIEC 60050-441:1984+A1, 441-11-024 Maintenance policyIt is the asset owners
41、 responsibility to ensure that there is an effectivemaintenance policy. An example of this is described in PAS 55. Whilst there is nolegal requirement for maintenance at any particular interval, there is a legalrequirement that the system and its parts continue to be safe.NOTE Attention is drawn to
42、the Electricity at Work Regulations 1989. See theHealth and Safety Executive (HSE) publication HSR 25 Memorandum of guidance onthe Electricity at Work Regulations 1989 1.There are several aspects of the risk assessment concerning the scope, contentand timing of the maintenance. Evidence is necessary
43、 to make a judgement ofwhat maintenance is required, ranging from functional checks to completereplacement. The performance of the system, operational history, environmentalexposure, physical condition, age and consequences of failure all provideevidence. Experience from similar systems gives useful
44、 guidance on potentialperformance. Manufacturers can be expected to provide guidance aboutmaintenance, but clearly different practical applications over the lifetime of thesystem can give rise to failure modes that the manufacturer might not be awareof. Further guidance is provided by competent orga
45、nizations e.g. the Healthand Safety Executive (HSE) or electrical consultants, standards and industryrecommendations. The initial maintenance interval and its content should be asadvised by this guidance unless the owner has developed technical and riskassessments which justify an alternative interv
46、al.Subsequent experience should be recorded and used to update maintenancepolicy. It is key to the continued safe operation of the system and its parts thatthere is adequate evidence to justify the maintenance policy. This may involveprogressive sampling of the equipment to assess the continuing con
47、dition ofequipment and understand potential failures. If the maintenance interval isextended and a system failure or fault can have significant consequences, thenadequate precautions should be taken to ensure that such faults can beanticipated and the consequences prevented so far as is reasonably p
48、racticable.Thus it is essential that any maintenance policy takes into consideration theapplication of the equipment, its use, environment, changes in operation andconsequences of failure.BRITISH STANDARD BS 6867:2013 The British Standards Institution 2013 3Options for maintenance can be restricted
49、by lack of available parts. Manyoriginal equipment manufacturers are no longer in business. Their equipmentmight be supported by other manufacturers, but such support can be limited.(See Clause 20.)5 Operational policyA documented overall design, operation, maintenance, examination, inspectionand testing scheme for the electrical installation, including fixed installations,switchgear, plant, machinery and equipment should be developed, withcompetent electrical workers employed to complete this work on site. Acommunications proc
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