BS 06626:2010 pdf download – Maintenance of electrical switchgear and controlgear for voltages above 1 kV and up to and including 36 kV – Code of practice 3.16 overhaul comprehensive set of examinations and actions carried out in order to maintain the required level of availability and safety of an item NOTE 1 Overhaul may be performed at prescribed intervals of time or number of operations. NOTE 2 Overhaul may require a complete or partial dismantling of the item. [BS EN 13306:2001, 8.6] 3.17 post-fault maintenance maintenance which might be necessary after a specifed number of fault clearance or making operations 3.18 preventive maintenance maintenance carried out with the objective of preventing failure NOTE It may include routine or non‑routine maintenance. 3.19 routine maintenance maintenance organized and carried out in accordance with a predetermined policy or plan to prevent failure or decide the likelihood of an item failing to be in an acceptable condition 3.20 servicing work carried out to ensure that the equipment is kept in an acceptable condition, which usually does not involve any dismantling, and is typically limited to cleaning, adjustment and lubrication 3.21 switchgear a general term covering switching devices and their combination with associated control, measuring, protective and regulating equipment, also assemblies of such devices and equipment with associated interconnections, accessories, enclosures and supporting structures, intended in principle for use in connection with generation, transmission, distribution and conversion of electric energy [IEC 60050-441:1984+A1, 441-11-02] 4 Maintenance policy It is the asset owner’s responsibility to ensure that there is an effective maintenance policy. An example of this is described in PAS 55. Whilst there is no legal requirement for maintenance at any particular interval, there is a legal requirement that the system and its parts continue to be safe. NOTE Attention is drawn to the Electricity at Work Regulations 1989. See the Health and Safety Executive (HSE) publication HSR 25 Memorandum of guidance on the Electricity at Work Regulations 1989 [2]. There are several aspects of the risk assessment concerning the scope, content and timing of the maintenance. Evidence is necessary to make a judgement of what maintenance is required ranging from functional checks to complete replacement. The performance of the system, operational history, environmental exposure, physical condition, age and consequences of failure all provide evidence. Experience from similar systems gives useful guidance on potential performance. Manufacturers can be expected to provide guidance about maintenance, but...
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