SIST EN 45510-2-7:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Guide for procurement of power station equipment - Part 2-7: Electrical equipment - Switchgear and controlgearLeitfaden für die Beschaffung von Ausrüstungen für Kraftwerke -- Teil 2-7: Elektrische Ausrüstung - SchaltanlagenGuide pour l'acquisition d'équipements destinés aux centrales de production d'électricité -- Partie 2-7: Equipements électriques - AppareillageGuide for procurement of power station equipment -- Part 2-7: Electrical equipment - Switchgear and controlgear29.130.10Visokonapetostne stikalne in krmilne napraveHigh voltage switchgear and controlgear27.100Elektrarne na splošnoPower stations in generalICS:Ta slovenski standard je istoveten z:EN 45510-2-7:2002SIST EN 45510-2-7:2003en01-februar-2003SIST EN 45510-2-7:2003SLOVENSKI
STANDARD
EUROPEAN STANDARDEN 45510-2-7NORME EUROPÉENNEEUROPÄISCHE NORMAugust 2002
CEN Management Centre:CENELEC Central Secretariat:rue de Stassart, 36
B-1050 Brusselsrue de Stassart, 35
B-1050 Brussels©
2002 CEN/CENELEC -All rights of exploitation in any form and by any means reservedworldwide for CEN national members and for CENELEC members.Ref. No. EN 45510-2-7:2002 EICS 27.100; 29.160.30English versionGuide for procurement of power station equipmentPart 2-7: Electrical equipment –Switchgear and controlgearGuide pour l'acquisition d'équipementsdestinés aux centrales de productiond'électricitéPartie 2-7: Equipements électriques –AppareillageLeitfaden für die Beschaffung vonAusrüstungen für KraftwerkeTeil 2-7: Elektrische Ausrüstung -SchaltanlagenThis European Standard was approved by CEN and CENELEC on 2001-03-06.CEN and CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate theconditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists andbibliographical references concerning such national standards may be obtained on application to the CENEELEC CentralSecretariat or to any CEN or CENELEC member.This European Standard exists in three official versions (English, French, German). A version in any other language madeby translation under the responsibility of a CEN or CENELEC member into its own language and notified to the CENELECCentral Secretariat has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France,Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerlandand United Kingdom.CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark,Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and United Kingdom.SIST EN 45510-2-7:2003

- 3 -EN 45510-2-7:200211Maintenance requirements. 2111.1Planned maintenance. 2111.2Personnel safety. 2111.3Requirements for access. 2111.4Lifting requirements. 2111.5Special tools. 2111.6Test equipment. 2211.7Spare parts strategy. 2211.8Special precautions. 2212Technical documentation requirements. 2212.1Tender documentation. 2212.2Contract documentation. 2213Applicable legislation, regulations, standards and further requirements. 2313.1Legislation and regulations. 2313.2Standards. 2313.3Further requirements. 2314Evaluation criteria. 2314.1General. 2314.2Technical criteria. 2315Quality measures. 2415.1General. 2415.2Approvals procedure. 2415.3Inspection requirements. 2415.4Non-conformity. 2516Site factors. 2516.1Access. 2516.2Facilities. 2516.3Site specific requirements. 2517Verification of specified performance. 2617.1General. 2617.2Works tests. 2617.3Tests during installation and commissioning. 2617.4Technical conditions for trial run. 2717.5Functional and performance tests. 27Annex A (informative) Bibliography. 28SIST EN 45510-2-7:2003

- 5 -EN 45510-2-7:2002Part 6-1: Turbine auxiliaries - DeaeratorsPart 6-2: Turbine auxiliaries - Feedwater heatersPart 6-3: Turbine auxiliaries - Condenser plantPart 6-4: Turbine auxiliaries - PumpsPart 6-5: Turbine auxiliaries - Dry cooling systemsPart 6-6: Turbine auxiliaries - Wet and wet/dry cooling towersPart 6-7: Turbine auxiliaries - Moisture separator reheatersPart 6-8: Turbine auxiliaries - CranesPart 6-9: Turbine auxiliaries - Cooling water systemsPart 7-1: Pipework and valves - High pressure piping systemsPart 7-2: Pipework and valves - Boiler and high pressure piping valvesPart 8-1: Control and instrumentationEN 45510-1 contains those clauses common to all the above Guides giving the provisions of a non equipmentspecific nature for use in the procurement of power station plant. EN 45510 is the responsibility of JTFPE. Theso called “common clauses”, as appropriate, also appear in italics in the documents specific to particularequipment.Where paragraphs of “common clauses” are omitted, each paragraph omitted is indicated by the symbol *****.In this Guide, words in bold type indicate that they have the meaning given in the definitions, clause 3.In this Guide, words and sentences not in italics are specific to this Guide and refer to the particular equipmentcovered.SIST EN 45510-2-7:2003

Therefore, theguidance to the specification is stated in performance terms rather than being specified by a detaileddescription of the equipment to be supplied.This Guide indicates to potential purchasers how their specification should be prepared so that:- the equipment type and capacity interfaces correctly with other elements of the systems;- predicted performance is achieved;- ancillary equipment is properly sized;- reliability, availability and safety requirements are achieved;- proper consideration is given to the evaluation process and the quality measures to be applied.This Guide does not determine the type of specification (e.g. detailed, performance, functional) or the extentof supply for any given contract which is normally decided on the basis of the purchaser’s project strategy.It does not cover:- any commercial, contractual or legal issues which are normally in separate parts of an enquiry;- any allocation of responsibilities which are determined by the contract.This Guide does not prescribe the arrangement of the documents in the enquiry.NOTE
As a comprehensive European environmental policy is still under preparation, this Guide does not address the environmentalimplications of the equipment.2Normative referencesThis Guide for Procurement incorporates by dated or undated reference, provisions from other publications.These normative references are cited in the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publications applyto this Guide only when incorporated in it by amendment or revision. For undated references, the latest editionof the publication referred to applies.European StandardsEN ISO 9001Quality systems - Model for quality assurance in design, development, production,installation and servicingEN ISO 9002Quality systems - Model for quality assurance in production, installation and servicingEN 60044-1Instrument transformers - Current transformers (IEC 60044-1, mod.)EN 60071seriesInsulation co-ordination (IEC 60071 series)EN 60129Alternating current disconnectors and earthing switches (IEC 60129)EN 60265-1High-voltage switches for rated voltages above 1 kV and less than 52 kV(IEC 60265-1)EN 60265-2High-voltage switches - Part 2: High-voltage switches for rated voltages of 52 kV andabove (IEC 60265-2)SIST EN 45510-2-7:2003

- 7 -EN 45510-2-7:2002EN 60282-1High-voltage fuses - Part 1: Current-limiting fuses (IEC 60282-1)EN 60298AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV andup to and including 52 kV (IEC 60298)EN 60420High-voltage alternating current switch-fuse combinations (IEC 60420)EN 60439-1Low-voltage switchgear and controlgear assemblies - Part 1: Type-tested andpartially type-tested assemblies (IEC 60439-1)EN 60439-3Low-voltage switchgear and controlgear assemblies - Part 3: Particular requirementsfor low-voltage switchgear and controlgear assemblies intended to be installed inplaces where unskilled persons have access for their use - Distribution boards(IEC 60439-3, mod.)EN 60439-4Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirementsfor assemblies for construction sites (ACS) (IEC 60439-4)EN 60470High-voltage alternating current contactors and contactor-based motor starters(IEC 60470)EN 60517Gas-insulated metal-enclosed switchgear for rated voltages of 72,5 kV and above(IEC 60517)EN 60622Sealed-nickel-cadmium prismatic-rechargeable single cells (IEC 60622)EN 60623Vented nickel-cadmium prismatic rechargeable single cells (IEC 60623)EN 60644Specification for high-voltage fuse-links for motor circuit applications (IEC 60644)EN 60694Common clauses for high-voltage switchgear and controlgear standards (IEC 60694)EN 60865seriesShort-circuit currents - Calculation of effects (IEC 60865 series)EN 60896seriesStationary lead-acid batteries - General requirements and methods of tests(IEC 60896 series)EN 60947-1Low-voltage switchgear and controlgear - Part 1: General rules (IEC 60947-1, mod.)EN 60947-2Low-voltage switchgear and controlgear - Part 2: Circuit-breakers (IEC 60947-2)EN 60947-3Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units (IEC 60947-3)EN 60947-4-1Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters- Electromechanical contactors and motor-starters (IEC 60947-4-1)EN 60947-5-1Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and+ A12switching elements - Electromechanical control circuit devices (IEC 60947-5-1)EN 60947-6-1Low-voltage switchgear and controlgear - Part 6-1: Multiple function equipment -Automatic transfer switching equipment (IEC 60947-6-1)EN 60947-7-1Low-voltage switchgear and controlgear - Part 7-1: Ancillary equipment - Terminalblocks for copper conductors (IEC 60947-7-1)EN 61264Ceramic pressurized hollow insulators for high-voltage switchgear and controlgear+ Corr.(IEC 61264)EN 62271-100High-voltage switchgear and controlgear - Part 100: High-voltage alternating-currentcircuit-breakers (IEC 62271-100)SIST EN 45510-2-7:2003

- 9 -EN 45510-2-7:20023.1.7siteplace to which the equipment is to be delivered or where work is to be done by the supplier, together with somuch of the area surrounding as the supplier may, with the consent of the purchaser, use for the purposesof the contractNOTE
Further definitions of useful organisational terms may be found in EN ISO 8402 (see annex A).3.2 Technical termsThe terms switchgear and controlgear are used in accordance with the international definitions as given inIEC 60050-441. However, for simplicity throughout this Guide, the general term switchgear covers bothswitchgear and controlgear3.2.1busbara conductor with associated connections, joints and insulated supports forming a common electrical connectionbetween a number of circuits or individual pieces of apparatus3.3 General terms3.3.1equipmentplant, component, system and/or associated service to be provided in response to the enquiry3.3.2conformityfulfilment of specified requirements by a product, process or service3.3.3performanceobligations verified by specified tests3.3.4operating periodtime between planned outages or maintenance periods during which the equipment is in operation and/or doesnot restrict operational requirements of the power station3.3.5life expectancytime period over which the equipment might be expected to operate with planned maintenance but withoutreplacement of a significant component.
For example, a switching device is a significant component3.3.6design lifeoperating hours of the equipment on which design calculations are based3.3.7acceptabilitycompliance with criteria defined by the purchaser for assessing the suitability of equipment3.3.8equipment marginsallowance for design, fabrication or operating contingency defined in the specification. These are separateto those normally included by the supplier for his own purposes3.3.9proven equipmentequipment which may be demonstrated to be similar to that offered and has operated for a sufficient time tohave demonstrated performance and availabilitySIST EN 45510-2-7:2003

e.g. flooding and tides.4.3 Equipment taskThe specification should describe in general terms the function, task or role of the equipment to bepurchased. e.g. whether it is part of a new power generating
plant, a modification to an existing powergenerating plant or replacement equipment.Where appropriate, the specification should define the function and the known limitations, if any, in theequipment connected to that which is being supplied so that the equipment may avoid imposing adverseconditions or the supplier may suggest modifications to connected equipment which would ensure satisfactoryoperation.SIST EN 45510-2-7:2003

- 11 -EN 45510-2-7:20024.4 Equipment to be purchasedThe specification may define the equipment type or arrangement to be purchased. For example, thespecification should provide a comprehensive description of the systems and services to be supplied.It is recommended that, unless forming part of the proposed contract, a conceptual design is undertaken priorto the issue of an enquiry.
The objective of this is the determination of the required ratings of the switchgearand ancillary plant consistent with the calculated fault levels and load flows.The specification should state the requirements where the standards and codes to be used permit options,together with any additional criteria with which compliance is required.The specification may also define preferences for equipment types (or give information) regardingcompatibility with existing equipment, if required.The specification should define the intended methods or local practice for maintenance, inspection andoperation.The specification should define requirements with regard to the general appearance of the equipment (e.g.dimensions, shape or colour) to meet local planning requirements or specific criteria, where such requirementsexist.NOTE
Attention is drawn to European, national and/or local legislation which may place restrictions in this area.4.5 Control and instrumentationThe specification should define the general requirements for the control and instrumentation system, the levelof operator intervention allowed or required, integration with other control systems, localised control loops,commonality and redundancy.NOTE
Guidance on the procurement of control and instrumentation systems for power stations, including advice on interfaces, can be foundin EN 45510-8-1.4.6 Electrical supplies and other servicesThe specification should define the electrical supplies available for the operation of the equipment, theirvoltages and frequencies, with their range of variation, phases available and, where appropriate, theacceptable values of maximum load (kW) and short circuit level at each voltage level and the harmonic content.Requirements for terminals and terminal boxes should be stated; these should be to a recognised Europeanor international standard.The specification should define the type and capacity of other services for the operation of the equipmentsuch as service fluids.4.7 Other interfacesThe specification should define the interfaces with existing ancillary or new ancillary equipment to be suppliedunder separate contracts which interact directly with the equipment. For example, protection, metering, bus-ducts, cabling, auxiliary electrical systems, civil works, cranage, or temporary systems.4.8Project programmeThe specification should describe the overall programme and timescale in which the project is to be carriedout. This may include the principal dates associated with tendering, placement of orders, access to site, startand completion of installation, commissioning, take-over and final acceptance.4.9Equipment identification systemsThe specification may specify the equipment identification system for use during the operating life of the plant.If applicable to the project, a recognised European or international system should be used.SIST EN 45510-2-7:2003

Requirements forseparate or integral control, instrumentation and protection panels.Ancillary systemsCabling, batteries, compressors and cooling systems.AccessoriesHandling systems required for control and maintenance operations (e.g. gas, oil) arerequired.Maintenance equipment Special tools, handling and test devices.Spare parts and consumables.For batteries, and battery systems, the following standards should be observed: IEC 60478, EN 60622,EN 60623, EN 60896.For detailed guidance on batteries and chargers, converters and uninterruptible power supplies see theseparate Guides for procurement for these items.Consideration should also be given to HD 637 for guidance on auxiliary AC and DC supplies, compressed airsystems and SF6 gas handling plant, and to the Guide for procurement on Cabling systems EN 45510-2-9where, for example, local cabling is required.If the purchaser wishes to have a contract for control and instrumentation separate from the equipment supplycontract, the specification may require the supplier to provide information on all the necessary interfaces. Inaddition provision may need to be made in the contract to ensure the availability of information necessary toallow a satisfactory control system to be obtained.
For example, this may include a requirement for cooperationbetween the purchaser and supplier. Alternatively, the specification may define the technical information onequipment characteristics to be provided by the supplier and the programme for its delivery.If the purchaser wishes to have a contract for electrical systems, electrical equipment, cables, etc. separatefrom the equipment supply contract, the specification may require the supplier to provide information on allthe necessary interfaces (electrical loads, shaft heights, motor speeds and direction of rotation, terminal boxes,etc.). Provision may need to be made in the contract for cooperation between purchaser and supplier forsystem(s) to be developed or the specification may define the technical information to be provided by thesupplier and the programme for its delivery. Similar provisions may be made for other services, etc.The extent of supply may include training, technical and layout studies, requirements for cooperation with thepurchaser and/or other suppliers and information on necessary interfaces, if any.The specification should define the requirements with regard to weather protection, the surface finish(e.g. painting), thermal insulation, noise insulation or cladding, etc.The specification may require that all parts of the equipment should be protected at all stages of delivery,storage and installation. Subsequent to final manufacture all equipment items should be protected againstdeterioration due to corrosion.The specification may also define exclusions, for example civil works such as buildings, foundations,structures and equipment obtained separately by the purchaser.The specification may indicate the acceptability of alternative offers being included in the tender.SIST EN 45510-2-7:2003

- 13 -EN 45510-2-7:20026Terminal pointsThe specification should define the main process input and output terminal points such that the function andperformance of the equipment and its major components, as defined in the extent of supply, may bedemonstrated to meet the requirements of the purchaser.The specification should identify voltage, fault level, load current infeeds/outfeeds and other operatingconditions which apply at the terminal points.
Further guidance on the data to be provided to the supplier foreach type of equipment is given in the standards referred to in clause 10.The specification should provide information on the cabling system, where this is to be included in the supply.Where the cabling is to be provided under a separate contract, the specification should define requirementsfor cable entry, glanding and termination. This may include information on:- cable entry, from above or below;- size and types of cables being used;- gland plates for terminal boxes to be provided by the supplier;- type of terminals and termination systems being employed.The specification should indicate the type and size of other connections to the switchgear.
In the case of busducts, and generator main connections, the specification should state that the supplier identifies interfaces(e.g. enclosure and connections dimensions and fixings) and it may be necessary to liaise directly with the busduct supplier.The specification should also define terminal points for existing or proposed services, support structures orcivil works.
These may, for example, include ancillary services, control and instrumentation system, heatingand ventilation systems, cranage, general access arrangements and fire fighting systems.It may be necessary for design and analytical work to extend beyond the physical terminal points. Thespecification should define such requirements, if any.7Operational requirements7.1 Operating environmentThe specification should describe the operating environment in which the equipment will be required tofunction. Factors such as temperature, humidity, extent of weather protection, dust, vibration andelectromagnetic environment (this may include both emission and immunity requirements) should be includedfor both normal and abnormal conditions by reference to the appropriate product standards. The type ofinstallation, whether indoor or outdoor, should be stated.The specification should also state the policy in the following operational areas:- risks e.g. loss of cooling systems, dust or water ingress, earthquakes, explosions or lightning;- obligations e.g. noise limits;- restrictions e.g. waste disposal, oil spillage, leakage and/or release of gases or gas degradation by-products.7.2Manning levelsThe specification should define the power station manning levels where they may influence the equipmentsupply.7.3 Normal operationThe specification should define in broad terms the expected normal operation of the power station and of theequipment.SIST EN 45510-2-7:2003

The generating stationelectrical systems may include main and auxiliaries electrical systems, uninterruptible power supplies (UPS),battery-backed DC supplies and stand-by generation.The design and performance of the switchgear should be such that, in the event of malfunctions, the systemsand equipment are capable of withstanding the most onerous faults, within their assigned performance ratings,and the faulty portion of the system should automatically be disconnected.The requirement to achieve high availability levels for generating plant should be recognised.
Wherenecessary, the levels of segregation of switchgear should be such as to minimise the spread of a fault,including a fire, occurring in any defined module into adjacent modules.The switchgear provided should be safe, fit for purpose, easy to maintain and have appropriate reliability,availability and operational flexibility.The specification should identify the normal system voltage and frequency variations and their relevantduration.7.4Operating hoursThe specification should define the total life time required of the power station and the equipment (e.g. hours)and the required operating period of the equipment.7.5 Start-up and shut-downThe purchaser should identify specific duties of the plant to be controlled where these could influence selectionof switchgear (e.g. base load, peak load, start up/shut down requirements, standby, etc.).The specification should define the expected changeover strategy where standby equipment or bypassesare provided.7.6Abnormal conditionsThe specification should provide information on the known abnormal conditions to which the equipment mightbe subjected. The supplier should take these into account in the design or selection of components/materials.Switchgear should be designed to achieve and maintain satisfactory operation under such sudden variationsof load, voltage and frequency as may be met under normal service conditions, including those due to definedtransient short-circuit and other fault conditions recognised in the component standards. The designs shouldalso ensure that damage and malfunction will not occur.The specification should identify any abnormal conditions under which the switchgear may be required tofunction (e.g. non-standard time constant or DC component, load shedding, operation without cooling, fanfailure, loss of power supplies, earthquake, etc.).The requirements for electromagnetic compatibility of equipment to the appropriate standards should beobserved.7.7Further operational requirementsNot applicable to this Guide.SIST EN 45510-2-7:2003

- 15 -EN 45510-2-7:20028Life expectancy8.1Design life8.1.1GeneralThis should be a specific period which takes into account the anticipated operating regime and recommendedmaintenance and will broadly equate to the stated operating hours (see 7.4).The specification should define the design life of components which may be subject to periodic replacement.The supplier should define limitations on equipment life, if any, and these should be included in the tenderevaluation process.8.1.2Number of start-up and shut-down cyclesThe specification should include an estimate of the number of cycles to which the equipment will besubjected.8.1.3Equipment for monitoring remaining lifeThe specification may request proposals for monitoring the remaining life of components which are subjectto fatigue, wear, erosion and/or corrosion.
In some cases specific requirements may be stated.For example: facilities should be provided for switchgear condition monitoring (gas pressures, springs charged, contactwear, etc.); incorporation of means to monitor circuits controlled (e.g. motor management schemes, protection relayswith communications facility).8.2Components requiring periodic maintenanceThe specification should request the supplier to provide a schedule of components which require periodicmaintenance or replacement. This should include the frequency of these operations. This schedule shouldinclude estimates of maintenance man-hours and cost of components. The supplier should identify thosemaintenance replacement operations which require shut-down of the process more frequently than the plannedmaintenance shut-downs.9Performance requirements9.1DutyThe specification should define the performance targets for the equipment at defined operating points andat other defined conditions. These may include efficiency and margins at full load operation and availability.The specification may also define the flexibility requirements over the full range of operating conditions.The specification may define performance requirements for individual components within the supply.The specification should state the duty requirements where the standards and codes to be used permitoptions, together with any additional criteria with which compliance is required.9.2PerformanceThe specification may define the operating points and other defined conditions at which the equipmentperformance requirements are to be demonstrated immediately after commissioning and/or at other points i
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