Guide for procurement of power station equipment -- Part 2-8: Electrical equipment - Power cables

This standard gives guidance on writing the technical specification for the procurement of low voltage (LV) and medium voltage (MV) power cables for use in electricity generating stations (power stations). This Guide for procurement is not applicable to equipment for use in the nuclear reactor plant area of nuclear power stations. Other possible applications of such equipment have not been considered in the preparation of this Guide.
This Guide covers power cables only for voltages up to and including Um  = 41,5 kV.  This Guide does not cover cables for public distribution systems, control and instrumentation systems or communications systems.
For guidance on the technical specification of cables, including their installation and termination, refer to EN 45510-2-6
The equipment covered by this Guide is defined by its function rather than design type.  Therefore, the guidance to the specification is stated in performance terms rather than being specified by a detailed description 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 extent of 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.

Leitfaden für die Beschaffung von Ausrüstungen für Kraftwerke -- Teil 2-8: Elektrische Ausrüstung - Starkstromkabel

Guide pour l'acquisition d'équipements destinés aux centrales de production d'électricité -- Partie 2-8: Equipements électriques - Câbles de puissance

Vodilo za nabavljanje opreme elektrarn – 2-8. del: Električna oprema – Elektroenergetski kabli

General Information

Status
Published
Publication Date
30-Nov-2004
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Dec-2004
Due Date
01-Dec-2004
Completion Date
01-Dec-2004

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SIST EN 45510-2-8:2004SLOVENSKIdecember 2004

STANDARDVodilo za nabavljanje opreme elektrarn – 2-8. del: Električna oprema – Elektroenergetski kabliGuide for procurement of power station equipment – Part 2-8: Electrical equipment – Power cables©

Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljenoReferenčna številkaSIST EN 45510-2-8:2004(en)ICS27.100; 29.060.20

EUROPEAN STANDARD
EN 45510-2-8 NORME EUROPÉENNE EUROPÄISCHE NORM
September 2004
CEN Management Centre: CENELEC Central Secretariat: rue de Stassart, 36
B-1050 Brussels rue de Stassart, 35
B-1050 Brussels

© 2004 CEN/CENELEC - All rights of exploitation in any form and by any means reserved

worldwide for CEN national members and for CENELEC members.
Ref. No. EN 45510-2-8:2004 E
ICS 27.100; 29.060.20
English version

Guide for procurement of power station equipment Part 2-8: Electrical equipment – Power cables

Guide pour l'acquisition d'équipements destinés aux centrales de production d'électricité Partie 2-8: Equipements électriques – Câbles de puissance

Leitfaden für die Beschaffung von Ausrüstungen für Kraftwerke Teil 2-8: Elektrische Ausrüstung – Starkstromkabel

This 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 the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CENELEC Central Secretariat or to any CEN or CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN or CENELEC member into its own language and notified to the CENELEC Central Secretariat has the same status as the official versions.

CEN and CENELEC members are the national standards bodies and national electrotechnical committees, respectively, of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EN 45510-2-8:2004 - 2 -
CONTENTS

Foreword....................................................................................................................................4 1

Scope.............................................................................................................................6 2

Normative references.....................................................................................................6 3

Definitions......................................................................................................................7 3.1

Organisational terms......................................................................................................7 3.2

Technical terms..............................................................................................................8 3.3

General terms.................................................................................................................8 4

Brief overall project description.....................................................................................9 4.1

Role and organisation of purchaser...............................................................................9 4.2

Site location...................................................................................................................9 4.3

Equipment task..............................................................................................................9 4.4

Equipment to be purchased...........................................................................................9 4.5

Control and instrumentation........................................................................................10 4.6

Electrical supplies and other services..........................................................................10 4.7

Other interfaces...........................................................................................................10 4.8 Project programme......................................................................................................10 4.9 Equipment identification systems................................................................................10 5 Extent of supply...........................................................................................................10 6 Terminal points............................................................................................................11 7 Operational requirements............................................................................................11 7.1

Operating environment................................................................................................11 7.2 Manning levels.............................................................................................................11 7.3

Normal operation.........................................................................................................11 7.4

Operating hours...........................................................................................................11 7.5

Start-up and shut-down...............................................................................................11 7.6 Abnormal conditions....................................................................................................11 7.7

Further operational requirements................................................................................11 8 Life expectancy............................................................................................................11 9 Performance requirements...........................................................................................12 10 Design and fabrication.................................................................................................12 10.1

Specific equipment features.........................................................................................12 10.2 Design justification......................................................................................................13 10.3 Material selection.........................................................................................................13 10.4 Safety...........................................................................................................................13 10.5 Interchangeability........................................................................................................14 10.6

Fabrication methods....................................................................................................14 11 Maintenance requirements...........................................................................................14 12 Technical documentation requirements.......................................................................14 12.1 Tender documentation.................................................................................................14 12.2 Contract documentation..............................................................................................14 13 Applicable legislation, regulations, standards and further requirements.....................14 13.1 Legislation and regulations..........................................................................................14 13.2 Standards.....................................................................................................................15 13.3 Further requirements...................................................................................................15 14 Evaluation criteria........................................................................................................15 14.1 General.........................................................................................................................15 14.2

Technical criteria..........................................................................................................15

- 3 - EN 45510-2-8:2004

15 Quality measures.........................................................................................................16 15.1 General.........................................................................................................................16 15.2 Approvals procedure...................................................................................................16 15.3 Inspection requirements..............................................................................................16 15.4 Non-conformity............................................................................................................16 16 Site factors...................................................................................................................16 16.1 Access.........................................................................................................................16 16.2 Facilities.......................................................................................................................17 16.3 Site specific requirements............................................................................................17 17 Verification of specified performance..........................................................................17 17.1 General.........................................................................................................................17 17.2 Works tests..................................................................................................................17 17.3 Tests during installation and commissioning..............................................................17 17.4 Technical conditions for trial run.................................................................................17 17.5 Functional and performance tests...............................................................................17 Annex A (informative)Bibliography..........................................................................................18 Annex B (informative)Information for selection of power cables.............................................19

EN 45510-2-8:2004 - 4 -
Foreword

This standard takes the form of a recommendation and is therefore entitled a “Guide”.

This Guide for procurement has been prepared by the CEN/CENELEC Joint Task Force Power Engineering (JTFPE) of which the secretariat is held by the British Standards Institution.

The text of the draft was submitted to the formal vote and was approved by CEN and CENELEC as EN 45510-2-8 on 2001-03-06.

The following dates were fixed:
- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2005-03-01
- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-03-01

This Guide for procurement has been prepared under mandates given to CEN and CENELEC by the European Commission and the European Free Trade Association.

This Guide for procurement is a part of a series of Guides mandated to cover the procurement of power station plant and equipment in conformity with European Procurement Directives. The Guides are:

EN 45510: Guide for procurement of power station equipment
Part 1: Common clauses

Part 2-1: Electrical equipment - Power transformers Part 2-2: Electrical equipment - Uninterruptible power supplies Part 2-3: Electrical equipment - Stationary batteries and chargers Part 2-4: Electrical equipment - High power static convertors Part 2-5: Electrical equipment - Motors Part 2-6: Electrical equipment - Generators Part 2-7: Electrical equipment - Switchgear and controlgear Part 2-8: Electrical equipment - Power cables Part 2-9: Electrical equipment - Cabling systems

Part 3-1: Boilers - Water tube boilers Part 3-2: Boilers - Shell boilers Part 3-3: Boilers - Boilers with fluidized bed firing

Part 4-1: Boiler auxiliaries - Equipment for reduction of dust emissions Part 4-2: Boiler auxiliaries - Gas-air, steam-air and gas-gas heaters Part 4-3: Boiler auxiliaries - Draught plant Part 4-4: Boiler auxiliaries - Fuel preparation equipment Part 4-5: Boiler auxiliaries - Coal handling and bulk storage plant Part 4-6: Boiler auxiliaries - Flue gas desulphurization ( De-SOx) plant Part 4-7: Boiler auxiliaries - Ash handling plant Part 4-8: Boiler auxiliaries - Dust handling plant Part 4-9: Boiler auxiliaries - Sootblowers Part 4-10: Boiler auxiliaries - Flue gas denitrification (De-NOx) plant

Part 5-1: Turbines - Steam turbines Part 5-2: Turbines - Gas turbines Part 5-3: Turbines - Wind turbines Part 5-4: Turbines - Hydraulic turbines, storage pumps and pump-turbines

- 5 - EN 45510-2-8:2004

Part 6-1: Turbine auxiliaries - Deaerators Part 6-2: Turbine auxiliaries - Feedwater heaters Part 6-3: Turbine auxiliaries - Condenser plant Part 6-4: Turbine auxiliaries - Pumps Part 6-5: Turbine auxiliaries - Dry cooling systems Part 6-6: Turbine auxiliaries - Wet and wet/dry cooling towers Part 6-7: Turbine auxiliaries - Moisture separator reheaters Part 6-8: Turbine auxiliaries - Cranes Part 6-9: Turbine auxiliaries - Cooling water systems

Part 7-1: Pipework and valves - High pressure piping systems Part 7-2: Pipework and valves - Boiler and high pressure piping valves

Part 8-1: Control and instrumentation

EN 45510-1 contains those clauses common to all the above Guides giving the provisions of a non equipment specific nature for use in the procurement of power station plant. EN 45510 is the responsibility of JTFPE. The so called “common clauses”, as appropriate, also appear in italics in the documents specific to particular equipment.

Where parts of the “common clauses” are omitted, this is indicated by the symbol *****.

Where minor changes have been made to sentences in the “common clauses” these are marked by a vertical line in the left margin.

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 equipment covered.

EN 45510-2-8:2004 - 6 -
Scope

This standard gives guidance on writing the technical specification for the procurement of low voltage (LV) and medium voltage (MV) power cables for use in electricity generating stations (power stations). This Guide for procurement is not applicable to equipment for use in the nuclear reactor plant area of nuclear power stations. Other possible applications of such equipment have not been considered in the preparation of this Guide.

This Guide covers power cables only for voltages up to and including Um
= 41,5 kV.

This Guide does not cover cables for public distribution systems, control and instrumentation systems or communications systems.

For guidance on the technical specification of cables, including their installation and termination, refer to EN 45510-2-6

The equipment covered by this Guide is defined by its function rather than design type.

Therefore, the guidance to the specification is stated in performance terms rather than being specified by a detailed description 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 extent of 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 environmental implications of the equipment.
Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

European Standards
EN ISO 9001
Quality management systems - Requirements
EN 50265
Common test methods for cables under fire conditions. Test for resistance to
vertical flame propagation for a single-insulted conductor or cable
Part 1: Apparatus
Part 2-1: Procedures - 1kW pre-mixed flame
Part 2-2: Procedures - Diffusion flame

EN 50266 Common test methods for cables under fire conditions. Tests for vertical flame

spread of vertically-mounted bunched wire or cables
Part 1: Apparatus
Part 2: Procedures
- 7 - EN 45510-2-8:2004

EN 50268 Common test methods for cables under fire conditions. Measurement of smoke

density of cables burning under defined conditions
Part 1: Apparatus
Part 2: Procedure
International standards

IEC 60050 (191) International electrotechnical vocabulary Chapter 191: Dependability and Quality of Services

IEC 60050 (461) International electrotechnical vocabulary Chapter 461: Electric cables.

IEC 60183 Guide to the selection of high-voltage cables.
Definitions
For the purposes of this Guide, the following definitions apply:
3.1
Organisational terms
3.1.1 purchaser recipient of a product and/or a service provided by a supplier.

3.1.2 supplier person or organisation that provides a product and/or a service to the purchaser.

3.1.3 specification document stating technical requirements of the purchaser. It may form part of an enquiry issued by a purchaser.

3.1.4

enquiry invitation to tender issued by a purchaser. It will normally include a specification together with the necessary contractual and commercial conditions.

3.1.5 tender offer made by a tenderer in response to an enquiry.

3.1.6 tenderer person or organisation submitting a tender for the equipment in response to the enquiry.

3.1.7 site place to which the equipment is to be delivered or where work is to be done by the supplier, together with so much of the area surrounding as the supplier may, with the consent of the purchaser, use for the purposes of the contract.

NOTE

Further definitions of useful organisational terms may be found in EN ISO 8402 (see

Annex A).
EN 45510-2-8:2004 - 8 -
3.2
Technical terms

Most technical terms applicable to the design, description, construction and performance of cables are defined in IEC 60050 International Electrotechnical Vocabulary, Chapter 461 or the normative references given in Clause 2.

The specification should define any additional technical terms not included in IEC 60050 (461) or the normative references.

For reasons of simplification, the general term ‘cables’ is used in this guide for those power cables, flexible cables and insulated wires intended to transmit electrical energy.

3.3
General terms

3.3.1 equipment plant, component, system and/or associated service to be provided in response to the enquiry.

3.3.2 conformity fulfilment of specified requirements by a product, process or service.

3.3.3 performance obligations verified by specified tests.

3.3.4 operating period time between planned outages or maintenance periods during which the equipment is in operation and/or does not restrict operational requirements of the power station.

3.3.5 life expectancy
*****
3.3.6 design life *****

3.3.7 acceptability compliance with criteria defined by the purchaser for assessing the suitability of equipment.

3.3.8 equipment margin *****
3.3.9 proven equipment *****
3.3.10 availability
as defined in IEC 60050 (191).
3.3.11 reliability as defined in IEC 60050 (191).
- 9 - EN 45510-2-8:2004
3.3.12 maintainability as defined in IEC 60050 (191).
Brief overall project description
4.1
Role and organisation of purchaser

The enquiry should define the purchaser’s role in the project, including whether the purchaser will assume responsibility for the planning and technical coordination of the project, or whether other organisations will be appointed to carry out all or part of this function. The enquiry should define all organisational interfaces and the procedures to be employed for managing the contract and the site.

4.2
Site location

The specification should describe the geographical location of the site which may include surveying points, the previous use of the site and any local features such as

impact of industrial or military activities and planning restrictions.

Where applicable, the specification should indicate site datum on specification drawings and specify site and drawing orientation and define co-ordinate axes (x,y,z) and numbering order

to ensure consistency between suppliers of connected equipment.

Where appropriate, the specification should define the permitted ground loading, dimensional and time restrictions on access routes up to but not including public roads or railways.

The specification should identify, where appropriate, the

environment of the site in which the equipment will operate. The following factors may normally be included if appropriate:

– climatic e.g. atmospheric pressure, annual variation of air and cooling water temperature, relative humidity, rain fall, icing, snow, wind velocity (normal and maximum), lightning;

– geological e.g. seismic conditions and characteristics of subsoil (e.g. caverns, gliding stratifications, load bearing capability of subsoils);

– geographic e.g. elevation, influence of local topography and structures;
– hydrological
e.g. flooding and tides.
4.3
Equipment task

The specification should describe in general terms the function, task or role of the equipment to be purchased. e.g. whether it is part of a new power generating

plant, a modification to an existing power generating plant or replacement equipment.

Where appropriate, the specification should define the function and the known limitations, if any, in the equipment connected to that which is being supplied so that the equipment may avoid imposing adverse conditions or the supplier may suggest modifications to connected equipment which would ensure satisfactory operation.

4.4
Equipment to be purchased
The specification may define the equipment type or arrangement to be purchased.

For example, either the purchaser should define the cable type, cross-section and length or, if the supplier is asked to select the cable, the specification should give the supplier all necessary information to allow the correct cable type and cross-section to be selected.

Such information may be as given in Annex B and/or IEC 60183.

The purchaser may need to define the length of cable to be supplied on each drum or, alternatively, a minimum drum length.

EN 45510-2-8:2004 - 10 -

The specification may also define preferences for equipment types (or give information) regarding compatibility with existing equipment, if required.

The specification should define the intended methods or
local practice for maintenance, inspection and operation.
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 requirements exist.

NOTE

Attention is drawn to European, national and/or local legislation which may place

restrictions in this area.
4.5
Control and instrumentation
*****
4.6
Electrical supplies and other services
*****
4.7
Other interfaces
*****
4.8 Project programme
The specification should describe the overall
programme and timescale in which the project is to be carried out.

This may include the principal dates associated with tendering, placement of orders, access to site, start and completion of installation, commissioning, take-over and final acceptance.

4.9 Equipment identification systems

The 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.

5 Extent of supply
The specification should define the extent of supply of all the equipment.

This may include, in addition to the equipment identified in 4.4, installation manuals, test reports and other specified documentation.

Consideration should also be given to the Guide for procurement on Cabling systems EN 45510-2-9 where cabling installation is required.

*****

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 against deterioration due to corrosion.

*****

The specification may indicate the acceptability of alternative offers being included in the tender.

- 11 - EN 45510-2-8:2004
6 Terminal points
*****
7 Operational requirements
7.1
Operating environment

The specification should describe the operating environment in which the equipment will be required to function. Factors such as temperature, humidity, extent of weather protection, dust, vibration and electromagnetic environment (this may include both emission and immunity requirements) should be included for both normal and abnormal conditions by reference to the appropriate product standards. The type of installation, whether indoor or outdoor, should be stated.

The specification should also state the policy in the following operational areas:

- risks e.g. fire, flooding, mechanical damage.
7.2 Manning levels
*****
7.3
Normal operation

The specification should define in broad terms the expected normal operation of the power station and of the equipment.

The maximum operating temperatures in normal operation are given in the relevant cable standards.

See Annex A.
7.4
Operating hours

The specification should define the total life time required of the power station.

7.5
Start-up and shut-down
*****
Not applicable to this Guide.
7.6 Abnormal conditions

The specification should provide information on the known abnormal conditions to which the equipment might be subjected. The supplier should take these into account in the design or selection of components/materials.

The maximum short-circuit temperatures are given in the relevant cable standards.

See Annex A.
7.7
Further operational requirements
*****
8 Life expectancy
*****
EN 45510-2-8:2004 - 12 -
9 Performance requirements
*****
10 Design and fabrication
10.1
Specific equipment features
10.1.1 General

For the installation of cables in electricity generating stations, different cable types according to the references listed in Annex A may be used such as :

– LV/MV power cables, unarmoured and armoured,
– wiring cables,
– halogen-free and/or fire resistant cables,
– flexible cables,
– mineral insulated cables, etc.

The design, properties and associated test procedures and parameters are fully described in the relevant standards.

See Annex A.

If additional requirements, e.g. special thermal requirements or fire performance requirements or resistance against chemicals are demanded, other cable types according to e.g. national regulations might be taken into account.

10.1.2 Fire performance

It may be appropriate to specify the required fire performance, for example, to obtain a consistent level from all cable types in an installation as far as is practicable.

Further guidance may need to be sought from the cable manufacturers.
• Fire tests on vertically-installed, insulated wire or cable
This should preferably be in accordance with one of the following:
– single insulated wire or cable; EN 50265,
– bunched wires or cables; EN 50266.

The specification should identify the cable or wire size(s) to be tested and, for bunched wires or cables, the test category.

• Smoke density
Typical test methods and requirements are given in EN 50268-1 and EN 50268-2.
The specification may identify the samples of cables to be tested.
10.1.3 Packaging
Cables should be supplied on cable drums.
The proper direction for rolling is to be indicated on the drum.

By agreement with the purchaser, short lengths may also be transported horizontally without drums, e.g. coiled.

The minimum inner diameter of the coil or the drum barrel diameter may be given in the specification.

All cable ends should be sealed to prevent the ingress of moisture into the cable.

- 13 - EN 45510-2-8:2004

Labelling should be applied to the drums or coils and should contain complete information on the cable type, cross-section and delivery length, and be applied in such a way as to withstand exposure to the weather or transport damage.

The delivery notes should include the drum numbers, the cable type, cross-section and the delivery lengths.

The delivery drums should be in a good condition to avoid possible damage to the cable.

The barrel should be substantially smooth.

The specification or supplier should indicate, whether the delivery drums are returnable or not.

The specification should state the method of physical protection of the cable during transportation.

10.1.4
Transport and storage

For the transport of cables only suitable carriers should be used. Cable drums should preferably be transported with drum axis horizontal. The drums should be protected against movement. Loading and unloading should be made by suitable devices to avoid damage to the cables and the cable drums. Fu

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