Svenska Kraftnät s requirements for documentation in cable projects

Transcription

1 UNIT, BUSINESS AREA AD, Plant documentation OUR DESIGNATION TR08-05 DATE CONSULTATION NT, NK, NL, AS, AFL, KI TECHNICAL GUIDELINES ISSUE 3 Td APPROVED Svenska Kraftnät s requirements for documentation in cable projects - Applies for installation underground, underwater or in a tunnel This technical guideline defines Svenska Kraftnät s requirements for documentation in power cable projects. The guideline is to be applied in both new construction projects and in reconstruction projects.

2 Updates Revision Change notification Date 1 First issue of the document Chapter 2.1 Project documentation has been issued and general clarification and grammatical adjustments have taken place. 3 Parts of TR08-05:2 submarine cable and TR08-05:3 tunnel and bridge have been transferred to this TR. OF opto has been omitted and a new TR08-07 has been produced for fibre-optic cable. TR08-05:1 renamed TR The entire document has been updated throughout and partially reworked. Document lists for underground and submarine power cables as well as those laid in tunnels have been collected in the same document. (revised by Gunnar Gehlin, AFL)

3 Contents 1 Introduction General Drawing requirements Sample drawings File and folder name Document lists Division into document groups Contents Drawings Situation documentation Technical specifications Earthing presentation Soil investigations/bottom investigations Calculations Measurements List of suppliers Technical quality documentation Technical descriptions Material specifications Photographs Maintenance document Document list underground cable Explanations for document list underground cable Document list submarine cable Explanations for document list submarine cable Document list cable laid in tunnel Explanations for document list cable laid in tunnel Appendices Sample drawings... 28

4 1 Introduction 1.1 General This technical guideline (TR08-05) itemises the documents, drawings and other documents which are to be supplied to Svenska Kraftnät (Svk) in connection with projects that involve new construction or reconstruction of power cable installations in ground, water, tunnels or bridge structures. The documentation according to this technical guideline shall include all plant components and all equipment included in relevant cable projects. Project boundary to adjacent projects is normally in terminal clamp for top bolt on the respective cable termination. Racks for installation of cable terminations are normally included in the cable project. Every cable project will be unique with respect to design and scope. The requirements for documents according to document lists in this TR must therefore be read as applicable where appropriate. A cable project can be either a purely underground, submarine or tunnel cable project, or a combination of them. In the latter case, the specific requirements for the documentation for the respective part is derived from the appropriate section 2.2, 2.4 or 2.6 below. 1.2 Drawing requirements All drawings produced in the project with Svenska Kraftnät s drawing number shall be delivered in file format according to the document list further down in this TR. Furthermore, all drawings for final documentation produced in the project shall also be delivered in the file format Portable Document Format (PDF). All drawings are to be supplied in a scale suitable for the respective drawing, so that the plant sections, components or equipment that the drawing presents are clearly set out and the drawing is reasonably legible. Standard scales according to Svenska Kraftnät s technical guideline for drawings TR08-02 shall be used. An appropriate standard scale shall be selected so that the plant sections, components or equipment that the drawing presents are clear and legible. All drawings are to be of the As built type. All drawings described in this technical guideline where the file format is DWG, shall have Svenska Kraftnät s drawing frame and drawing number in accordance with TR The requirements for some drawings are clarified in section 2.3 below. 1.3 Sample drawings To ensure that the drawings contain the information which Svenska Kraftnät intends, a number of sample drawings have been produced. The sample drawings only show how the documentation of the technical content should be configured, and not how actual designs should be configured. Sample drawings are shown in appendices. For detailed requirements for drawings see TR08-02.

5 1.4 File and folder name The document list in chapter 2 presents the documents which are to be delivered to Svenska Kraftnät. The documents are to be delivered in a folder structure which corresponds with the order in the document list. The table headings constitute folder level 1, the section designations constitute folder level 2, and so on. The file names shall comprise an informative text which makes it possible to determine the file s contents without the file having to be opened and read. Below is an example of a limited part of the folder structure. 2 Document lists 2.1 Division into document groups The document lists below list the drawings and other documents which are to be supplied as final technical documentation from the project. The following groups of documents apply: Contents Shall provide a summary of what is included in the technical documentation Drawings Drawings shall be supplied presenting the built plant s design and construction both in outline and in detail. The drawings can be general plans, detailed drawings, design drawings or construction drawings. Drawings shall be dimensioned to the extent required for the respective drawing s interpretation and legibility. Construction drawings shall be provided with bills of materials Situation documentation The aim of the situation documentation is to present the built plant s geographic location (coordinates) based on data entered. The situation documentation shall include both x/y coordinates and z coordinate. TR Technical specifications Document which shall present detailed technical data for plant section, apparatus, component, equipment or similar supplied. The document is usually a data sheet, but can also comprise an equivalent brief summary. The content can be electrical, mechanical, thermal data/performance/requirement, material, dimensions, weights, etc.

6 2.1.5 Earthing presentation The document group shall show how the built cable installation's earthing system is designed and constructed. This applies to both so-called "functional" and "protective" earthing. Design and earth electrode resistances measured are to be presented. Svenska Kraftnät s earth electrode protocol shall be used and adjusted when necessary Soil investigations/bottom investigations Shall present implementation and results of any soil investigations (cable underground or in a tunnel) or bottom investigations (submarine cable). Can apply to, for example, geotechnical investigations with the aim of examining the ground's character, soil type, stability etc., thermal surveys, or investigations of underground water levels. For submarine cables it entails documenting bottom conditions and finding a suitable route etc Calculations Any electrical, thermal or mechanical calculations that the cable supplier or contractor in the project has performed with the aim of ensuring the function and/or dimensioning a part of the plant supplied are to be presented here Measurements This document group comprises the results from the measurements performed within the framework of the project. It might involve measurements of thermal resistivity in the ground, measurements of earth electrode resistance or something else. The results from the impedance measurement of the cable system which take place after completion shall also be presented here. However, measurements that are included in the supplier s final testing after installation are not referred to under this heading, Site Acceptance Test (SAT) List of suppliers Information about suppliers of different materials and equipment is presented here. It might involve material included in the cable system per se, but also material in contracts Technical quality documentation Records of tests performed according to relevant standards are presented here. This concerns both qualification tests (Type Test) and tests during manufacturing/production (Factory Acceptance Test, FAT) and tests after installation (Site Acceptance Test, SAT). Inspection records and similar from surveys and inspections during the course of the project are also presented here Technical descriptions Documents produced which have the aim of providing a technical account of the cable system, and/or parts of it. The documents can also provide a technical description of assembly, laying or installation of the plant or parts of it Material specifications Documents that present composition/content of certain materials used in cable systems, components, equipment, filling material or similar. It might involve environmentally-

7 related declarations, or quality/performance-related declarations (e.g. the composition of thermal protective filling) Photographs Photographs are primarily to be used to document plant sections which are not normally visible, but which for various reasons it is beneficial to show in a photograph, e.g. equipment for and design of joint locations in the ground. Photographs can also be used to advantage to document elements in the production process, or to document tests and checks performed on equipment delivered Maintenance document Examples of what is presented here are the supplier s method descriptions for cable splicing and assembly of cable terminations, recommendations for maintenance and service of equipment delivered, as well as recommendations for storage of spare parts. 2.2 Document list underground cable In this technical guideline, underground power cable refers to power cable that is designed to be laid on land, and which is either laid directly in the ground (excavated or blasted cable trench), in a pipe in a cable trench, in a concrete-encased pipe or equivalent, in a culvert at ground level, or through laying without excavating, e.g. guided drilling. In exceptional cases, cable designed to be laid on land (provided that it is equipped with secure radial water barriers), may be laid in shallow lakes or equivalent. Such laying is also included in this document list. MK Underground cable Document/Item Description MK00 Contents MK00.01 Document list Complete list of all documents and other items included in the documentation. Document name, revision number, issue/revision date shall be shown. MK01 Drawings MK01.01 Drawing list Complete list of drawings. Drawing number shall be indicated. Drawings shall be furnished with Svk drawing number MK01.02 List of cancelled drawings in the Bank File type xls/xlsx xls/xlsx xls/xlsx MK01.03 General plan cable route The drawing shall present an overview of the cable s route and geographic location. See in addition description under section 2.3. MK01.04 Plan drawing & Profile drawing The drawing shall present the power cables surveyed in plan and profile. Height scale shall be shown. Any marking poles shall be set out with surveyed positions. MK01.05 General plan station installation The drawing shall show location of cable terminations within station area. The drawing (which can be a site plan of the station) shall show other vital parts of the station. Wiring connected to the power cables shall be shown.

8 MK Underground cable Document/Item Description MK01.06 General plan joint location The drawing shall present the joint location s design and arrangement. Joint locations with different designs are to be presented in separate drawings. See in addition under section 2.3. MK01.07 Detailed drawings/cross sections with normal underground cables (Direct Buried). Where applicable, the drawings shall show trench sections, i.e. cross sections of the cables positions in the cable trench. See in addition under section 2.3. File type MK01.08 Detailed drawings/cross sections when laying piping. Where applicable, the drawings shall show cross sections of piping. See in addition description under section 2.3. MK01.09 Detailed drawings/cross sections when laying culverts. Where applicable, the drawings shall show cross sections of the cable installation when laying culverts. See in addition description under section 2.3. MK01.10 MK01.11 Detailed drawings/cross sections when intersecting other infrastructure Assembly drawing of cable termination The drawings shall show relevant cross sections of the cable installation at crossing point with other infrastructure, such as other mains or roads/railway etc. See in addition description under section 2.3. The drawing shall show the cable termination fitted on its rack, as well as cable current transformers, junction boxes, PD-measuring boxes etc. and wiring and earthings. Location of PD-sensors shall be set out. MK01.12 Detailed drawing of joint location The detailed drawing shall present the joint location s complete design in more detail than the general plan. See in addition under section 2.3. MK01.13 Design drawings concrete Drawings which show design of any base plates for joint location, or design of any concrete enclosures for junction boxes or similar. MK01.14 Design drawings steel Design drawings for racks for cable terminations shall be presented, as well as design drawings for any assembly components for junction boxes etc. If adapters or similar are required for assembly of cable terminations on racks, design drawings for these shall also be presented. MK01.15 Detailed drawings cable joints This refers to the supplier s/manufacturer s detailed drawing of the cable joint s construction. MK01.16 Detailed drawings cable termination This refers to the supplier s/manufacturer s detailed drawing of the cable termination s construction. MK01.17 Detailed drawings cable clamps This refers to the supplier s/manufacturer s detailed drawing of the design of cable clamps supplied. (Cable clamps are used for cable terminations and if necessary for securing joint location.) MK01.18 Detailed drawings junction boxes etc. This refers to the supplier s/manufacturer s detailed drawings of junction boxes/link boxes or measuring boxes supplied. MK01.19 Phase sequence diagram See description under section 2.3. MK01.20 Earthing diagram See description under section 2.3. MK02 Situation documentation MK02.01 Coordinate lists and files The entire cable installation including vital parts such as joint locations, concrete enclosures, connection chambers, fibre-optic chambers, pipe laying etc. shall be surveyed and presented according to Svk s instructions, see TR MK03 Technical specifications See TR08-06 MK03.01 Technical specification power cable This refers to the supplier s technical specification (Design Report), partly in words, of design/construction of the cable, as well as data sheets which present electrical, thermal and mechanical data, as well as information about dimensions and weight and handling the cable. MK03.02 Technical specification cable joints This refers to the supplier s technical specification in words of the design of the cable joint supplied, as well as data sheets which present electrical, thermal and mechanical data, as well as information about dimensions and weight for complete joint housings.

9 MK Underground cable Document/Item Description MK03.03 Technical specification cable This refers to the supplier s technical specification in termination words of the design of the cable termination supplied, as well as data sheets which present electrical, thermal and mechanical data, as well as information about dimensions and weight for complete cable termination. MK03.04 Technical specification ducting pipe The supplier s data sheet and drawings for product supplied. MK03.05 MK03.06 MK03.07 MK03.08 MK03.09 MK03.10 MK03.11 MK03.12 MK03.13 Technical specification cable current transformers Technical specification fibre-optic cables Technical specification junction boxes and earthing boxes Technical specification cable ties, stripes or means of attachment for cable Technical specification fibre-optic chambers or any other chambers Technical specification hoses/pipes for communication cables Technical specification equipment for temperature monitoring (DTS) Technical specification equipment for PD-measurement Technical specification and marking of pipe system in electric power installations The supplier's data sheet and drawings for component supplied The supplier s data sheet/technical specification for fibreoptic cables supplied for communication or DTS The supplier s data sheet/technical specification for component supplied The supplier s data sheet/technical specification for component supplied. Here, means of attachment refers to any cable clamps or equivalent at joint locations. The supplier s data sheet/technical specification for chambers supplied The supplier s data sheet/technical specification for pipes and/or hoses supplied The supplier s data sheet/technical specification for system solution supplied. The system s performance shall be specified. Shall be supplemented with a technical description. The supplier s data sheet/technical specification for solution supplied. Measurement performance etc. shall be specified. Shall be supplemented with a technical description Cable marking poles. AMA EL. YTB.1632 Shall be entered with coordinates in Sweref99 TM MK04 Earthing presentation MK04.01 Earthing description A comprehensive description of the earthing system s design. The description shall be sufficiently detailed to enable understanding of the technical construction. Integral components/equipment shall be specified. MK04.02 Earthing map Planimetric map in scale 1:2,000 of cable installation, earth wires and earth electrodes drawn in. MK04.03 Measuring protocol for step and touch voltages If this is required: Protocol which shows results of measurements performed of step and touch voltages incl. mapping of low voltage network File type MK05 Soil investigations MK05.01 Soil investigation records Results of soil investigations performed are to be presented. Relevant investigations are mapping of soil types, stability assessments, surveys of ground resistivity etc. Exploratory drilling is also accommodated under this heading. Where cables are laid in shallow lakes and similar, results from bottom surveys can also be included. MK06 Calculations MK06.01 Capacity calculations The supplier s calculation results for the expected thermal fan out for cable systems supplied, under given/assumed conditions. Likewise, results from calculation of the cable system s short-circuit resistance shall be presented. MK06.02 Mechanical calculations Any mechanical calculations performed within the framework of the project shall be presented here. For example, it might involve calculations due to modifications or additions to original designs. MK06.03 Geotechnical calculations Any geotechnical calculations performed within the framework of the project shall be presented here. For example, it might involve stability calculations to ensure carrying capacity. MK07 Measurements (not included in testing)

10 MK Underground cable MK07.01 MK07.02 MK07.03 Document/Item Measuring protocol ground resistivity Measuring protocol compaction control Measuring protocol sheath test after cable laying Description Provided that such measurements are performed, results of measurements of the ground s thermal resistivity in [K m/w] before excavating the cable trench are to be presented here The results of measurements taken of degree of compaction in cable foundation and protective filling (Troxler measurement or equivalent method) are to be presented here. The results from sheath tests performed in connection with laying power cables (not to be confused with sheath test included in SAT) are to be presented here. File type MK07.04 MK07.05 Measuring protocol impedance measurement Measuring protocol earth electrode measurements The results of measurements taken of cable joint s plus-, minus- and zero-sequence impedances after completion, but before commissioning, shall be presented here. To be performed by cable supplier or another party. In accordance with Svenska Kraftnät Excel template (modified for cable project). MK08 List of suppliers MK08.01 List of materials suppliers A list of qualified suppliers of critical materials, such as insulating oil, PEX-material, compound material joints etc. xls/xlsx MK08.02 List of equipment suppliers A list of suppliers of accessories/equipment, such as SVLs, DTS systems etc. MK09 Technical quality documentation MK09.01 Inspection record Records from surveys and inspections performed are to be presented here. Relevant inspections are checking cable trench, conduit foundation, protective filling, checking after laying cable, backfilling, assembly work, as well as Final inspection, Operational inspection, Guarantee inspection. MK09.02 Measuring protocol thermal protective filling The supplier s records showing that the thermal sand supplied meets the set requirements are to be presented here. MK09.03 Measuring protocol bentonite filling The supplier s records showing that the thermal filling supplied (bentonite) meets the requirements are to be presented here. MK09.04 Records Type Test Records of tests the supplier has performed on cable and all accessories included (cable joints and cable terminations). Type test of complete cable systems shall be presented. Type testing of junction boxes shall also be presented. The type test shall be performed according to applicable IEC standards. Tests for HVDC cables shall be performed according to Cigré TB 496 MK09.05 Records of Sample Test Records of sample tests performed by the supplier. According to applicable IEC standard. Tests for HVDC cables shall be performed according to Cigré TB 496 MK09.06 Routine test Records of routine tests performed by the supplier. According to applicable IEC standard. Tests for HVDC cables shall be performed according to Cigré TB 496 MK09.07 After Installation Tests Records of Sheath Tests (included in SAT) Records of sheath tests (DC) of complete cable systems the supplier has performed, as well as crossconnection systems where applicable. According to IEC MK09.08 Records of Phase Sequence Tests Records of phase sequence tests the supplier has performed. According to customary standards. MK09.09 Records of PD measurement Test records from PD measurements on all accessories fitted with PD sensors. If PD sensors are installed and performed according to the supplier s standard. MK09.10 Records Impedance measurement Test records from measurements performed by the supplier of plus-, minus- and zero-sequence impedance data. MK09.11 Records of AC or DC test (Operational test) Records of AC tests performed by the supplier. The test is to be performed according to applicable IEC standards and/or according to agreement.

11 MK Underground cable MK09.12 Document/Item Records TDR (Time Domain Reflectometry) Description Where appropriate: Records of TDR measurements performed by the supplier. MK09.13 ITP (inspection and test plan) Information test and quality control shall be implemented File type MK09.14 NCR (non conformance report) Deviation reports, ISO9001 MK10 Technical descriptions MK10.01 Technical description cable systems MK10.02 Technical description cable installation The supplier s overall technical description of cable systems installed. The description shall present the system s fundamental structure and function, including main integral components and screen connection. Description of cable installation s construction, based on AMA MK10.03 Technical description DTS system The supplier s overall description of structure and function of system supplied for measurement of the cable temperature, DTS system (if installed). The description shall set out functional principle, as well as how and where measurement/monitoring takes place, installation of measurement fibre etc. MK11 Material specifications MK11.01 MK11.02 Material specification protective filling Material specification filling material for pipe laying The supplier s data sheet/technical specification for thermal material supplied. Screening curve shall be presented. The supplier s data sheet for bentonite mixture or equivalent supplied MK11.03 List of materials (MSDS) The supplier s summary of content declarations for relevant material included in cable and accessories. Primarily applies to insulating oils, any compound materials, plastics. MK12 Photographs MK12.01 Photographic documentation of joint locations The photographs shall document all joint locations. The photographs shall be taken when the joint location is fully completed technically, but before protective filling/backfilling has been implemented. A sketch with a north arrow to show where north is, is to be placed in the trench when photographing the joints in the trench. MK13 Maintenance document MK13.01 Maintenance manual Cable system The supplier s specific advice and instructions for operation and maintenance of cable system supplied. MK13.02 Instructions cable laying The supplier s specific advice and instructions for cable laying and handling of power cable supplied. MK13.03 Method description cable splicing The supplier s description as a basis for correct assembly of cable joints (spare parts) supplied MK13.04 Method description Assembly of cable terminations The supplier s description as a basis for correct assembly of cable terminations (spare parts) supplied. MK13.05 Repair agreement Cable splicing A repair agreement shall be signed with the cable supplier to ensure rapid access to repair staff and resources in the event of a cable fault. MK13.06 List of spares The supplier shall compile a list of all spare parts (cable, joints, end parts etc.) which have been supplied. The document shall also include instructions for storage and handling of the spare parts, as well as information about the predicted useful service life. MK13.07 Operation and Maintenance Instruction for DTS system Where appropriate: The supplier s specific advice and instructions for operation and maintenance of DTS equipment supplied. The instruction shall include operation of the system. MK13.08 Traceability documentation Protocol presenting which cable lengths (unique number) are installed where, ID no. of all joints, cable terminations, etc. installed shall be set out. JPEG

12 2.3 Explanations for document list underground cable Explanations and clarifications of certain of the points in the document list according to the above are provided below. MK01.03 General plan cable route A general plan shall function as an overall document which clearly shows the cable installation's route. The general plan shall refer to underlying drawings. The type and number of the various underlying drawings shall be clearly set out on the general plan. The general plan shall be according to scale and drawn up in such a way as to clearly set out the cable connection s geographic location. Roads, buildings etc. in the vicinity of the cable route shall be shown. Any pipe installations, intersections with other mains structures and similar shall be marked on the drawing. If legibility requires it, the general plan shall be divided into a number of drawings. For example, see appendix 1. MK01.06 General plan joint location The drawing shall present the joint location s design and arrangement. The locations of the joint housings shall be set out, as well as other equipment such as junction boxes, boxes for PD measurement etc. Any concrete enclosures or chambers for these boxes shall also be shown. If a concrete slab or equivalent has been placed in the jointing pit, this shall be shown. MK01.07 Cross sections with normal cable laying in the ground Sectional drawings which show the cable trench s dimensions and the power cables positions in the cable trench shall be produced for the different installation configurations that occur along the cable route. Sectional drawing with direct burial in the ground shall as a minimum show: Trench depth Trench bottom width Dimensions of protective filling (cable sand or equivalent) Depth of filling above the cables The power cables positions, with reciprocal distance between cables. Location of cable protection and warning mesh or equivalent Type of backfill/cable sand Type of surrounding ground (moraine, earth, clay, etc.) Any surface layer over the cable installation Location of earth wires. Location of any fibre-optic cables/empty pipes for communication Location of any fibre-optic cables for temperature measurement (DTS) Other mains structures (electricity, sewage, water, district heating, telecoms, fibre-optic) parallel to the cable installation which are located at a distance of 5 m from outer cable. Each sectional drawing shall be marked with coordinates (starting point) according to Svenska Kraftnät s technical guideline for surveying, TR08-06, and shall also be given an ID-number. Coordinates shall agree with coordinates entered for the cable installation. The sectional drawing s starting point and ID shall be set out in the general plan. Each sectional drawing shall apply until reference to another sectional drawing is made. Direction in relation to the next sectional drawing that applies is governed by the surveying.

13 Breakpoint for production of new sectional drawing is when there is a significant change in the particular cross section. Examples of significant changes are when trench depth and/or filler depth changes by more than 20 cm, if the power cables (or groups of cables) reciprocal distance changes by more than 10 cm, if protective filling or surrounding soil type changes, or if a change occurs in the location of cable protection/warning mesh. There is also a breakpoint if a change occurs in the installation of earth wires or fibre-optic/telecoms lines, or in a jointing chamber. For example, see appendix 3. Sectional drawings for joint locations and intersections with another infrastructure are dealt with separately. MK01.08 Cross sections for pipe laying Pipe laying here refers to all pipe laying, i.e. normal pipe laying in an excavated cable trench, pipe laying after guided drilling, hammer drilling or similar, or e.g. ducting pipe embedded in concrete or similar. In this context, pipe laying also includes crossing water courses or other catchment areas, where the installation cannot be regarded as submarine cables. Sectional drawing for pipe laying shall as a minimum show: Installation depth The pipes positions, with reciprocal distance between them. Pipe diameter and pipe thickness Pipe material and pipe filling (material) Location of any cable cover and warning mesh or equivalent Type of backfill/cable sand and/or type of surrounding soil Any surface layer over the cable installation Any reinforced cable protection, for example concrete slabs or similar. Location of earth wires. Location of any fibre-optic cables/empty pipes for communication Location of any fibre-optic cables for temperature measurement (DTS) Other mains structures (electricity, sewage, water, district heating, telecoms, fibre-optic) parallel to the cable installation which are located at a distance of 5 m from outer cable. Each sectional drawing shall be marked with coordinates according to the same principle described under MK01-07 above. Breakpoint for production of new sectional drawing is the same as for normal laying in the ground, when significant changes occur in applicable cross sections. With, for example, guided drilling with a substantial installation depth and a substantial distance between pipe/cables, there is less sensitivity for deviations and assessment of significant changes may therefore be made from case to case here. For example, see appendix 2. MK01.09 Cross sections with culvert laying Culvert laying refers here to all cable laying in closed or open (with cover or grate) culverts/trough of concrete or equivalent, located at ground level. Sectional drawing for pipe laying shall as a minimum show: Trench depth for the culvert The culverts/trough s dimensions (width and height) Material thickness and material in the construction The power cables positions with reciprocal distance Any occurrence of filling material and/or cable sand

14 Any spacers, brackets or cable clamps etc. Location of earth wires. Location of any fibre-optic cables/empty pipes for communication Location of any fibre-optic cables for temperature measurement (DTS) Other mains structures (electricity, sewage, water, district heating, telecoms, fibre-optic) parallel to the cable installation which are located at a distance of 2 m from outer cable. Each sectional drawing shall be marked with coordinates according to the same principle described under MK01-07 above. Breakpoint for production of new sectional drawing is the same as for normal laying in the ground, when significant changes occur in applicable cross sections. For culvert laying a change in the culvert s dimensions of more than 20 cm is counted as significant. MK01.10 Cross sections when intersecting with other infrastructure Specific sectional drawings shall be produced at points where the cable installation intersects with another infrastructure. Infrastructure here refers to roads, railways etc., as well as other mains structure (electricity, telecoms, fibre-optic, water, sewage, district heating etc.). In addition to the specifications under MK01.07, MK01.08 or MK01.09 above, sectional drawings for intersections with other infrastructure shall as a minimum also show: Positioning/location for intersecting infrastructure Distance between power cables and intersecting infrastructure With roads/railway: Dimensions of and material in roadbed resp. embankment and its substructure. Any protective or strengthening measures. With mains structure: Type of mains, mains dimension and material. Where appropriate, voltage level. Number of intersecting mains (if more than one). Each sectional drawing shall be marked with coordinates according to the same principle described under MK01-07 above. MK01.12 Detailed drawing joint location In addition to what is stipulated for general plan according to MK01.06, the detailed drawing shall also present the power cables locations, any cross-connection cables, earthing cables, measurement cables, as well as earth wires/counterpoise wires. Location of any PD sensors shall be shown. Individual cables shall be ID marked. MK01.19 Phase sequence diagram A phase sequence diagram shall be presented, where the location of phases L1, L2 and L3 is clearly set out along the entire cable route from station to station, through any pipe ducting and past joint locations. Any transposition points shall be clearly shown, and the phases location before and after such transposition points shall be presented. Linear measurement in m at each transposition point shall be given. The phases positions within the respective cable group shall be shown in the cross section. For example, see appendix 4. MK01.20 Earthing diagram A diagram of the cable system's earthing system shall be produced. The diagram shall present earth wires/counterpoise wires, earth electrode, as well as the cable shields' connections in all relevant connecting points such as station connections, jointing points and earthing points. Dimensions of earthing cables shall be specified. Earthing points

15 shall be drawn in and lengths in m to earthing points shall be indicated. Any crossconnection boxes and/or earthing boxes shall be drawn in and the cable shields connections and interconnections in them shall be clearly set out. For example, see appendix Document list submarine cable In this technical guideline, submarine power cable refers to power cable which is designed to be laid in water (lake, sea, river or equivalent) and, where appropriate, on land close to the shore. Boundary for submarine cable is set at transition joints at the shoreline. The transition joints belong to the submarine cable project. SK Submarine cable Document/Item Description SK00 Contents SK00.01 Document list Complete list of all documents and other items included in the documentation. Document name, revision no., issue/revision date shall be given. SK01 Technical descriptions SK01.01 Technical description cable systems SK01.02 Technical description cable installation ( As built Report) The supplier s overall technical description of cable systems installed. The description shall present the system s fundamental structure and function, including main integral components and screen connection. The project s/contractor s description of the cable installation s design. The description shall include how the submarine cables are laid, protective measures such as flushing, ploughing, covering etc., as well as descriptions of any crossing of obstacles. SK01.03 Technical description DTS system The supplier s overall description of structure and function of system supplied for measurement of the cable temperature, DTS system (if installed). The description shall set out functional principle, as well as how and where measurement/monitoring takes place, installation of measurement fibre etc. SK02 Drawings SK02.01 Drawing list Complete list of drawings. Drawing number shall be indicated. Drawings shall be furnished with Svk drawing SK02.02 List of cancelled drawings in the Bank number SK02.03 General plan cable route The drawing shall present an overview of the cable s route and geographic location. See in addition description under section 2.5. SK02.04 Plan drawing & Profile drawing The drawing shall present the power cables surveyed in plan and profile. Height scale shall be shown. Any marking poles and warning signs shall be set out with surveyed positions. SK02.05 SK02.06 General plan for land/water intersection for location of transition joints Detailed drawings/cross sections cable trench close to shoreline The drawing shall present an outline of the land/water intersection, as well as present design and arrangement of transition joint locations. See in addition under section 2.5 The drawings shall show trench sections present, i.e. cross sections of the cables installation in any cable trench. See in addition under section 2.5 File type xls/xlsx xls/xlsx xls/xlsx SK02.07 Detailed drawings/cross sections for laying underwater. The drawings shall show normal cross sections of installation in areas close to the shoreline and at sea. See in addition description under section 2.5. SK02.08 Detailed drawings at intersections with other mains and submarine cables The drawings shall show relevant cross sections of the cable installation at crossing points with other submarine mains/cables. See in addition description under section 2.5. SK02.09 Detailed drawing of location of transition joints The detailed drawing shall present the joint location s complete design in more detail than the general plan. See in addition under section 2.5

16 SK Submarine cable Document/Item Description SK02.10 Design drawings concrete Drawings which show design of any base plates at joint location, design of any concrete enclosures for junction boxes or concrete construction for Hang-off. SK02.11 Detailed drawings cable joints This refers to the supplier s/manufacturer s detailed drawing of structure of transition joints and any submarine joints. SK02.12 Detailed drawings cable clamps This refers, where applicable, to the supplier s//manufacturer s detailed drawing of design of cable clamps supplied (can be used at transition joints). File type SK02.13 Detailed drawings junction boxes etc. This refers to the supplier s/manufacturer s detailed drawings of junction boxes/link boxes or measuring boxes supplied. SK02.14 Phase sequence diagram See description under section 2.5. SK02.15 Earthing diagram See description under section 2.5. SK03 Situation documentation SK03.01 Coordinate lists and files The entire cable installation including vital parts such as joint locations, concrete enclosures, connection chambers, fibre-optic chambers, pipe laying etc. shall be surveyed and presented according to Svk s instructions, see TR SK04 Technical specifications SK04.01 Technical specification power cable This refers to the supplier s technical specification (Design Report), partly in words, of design/construction of the cable, as well as data sheets which present electrical, thermal and mechanical data, as well as information about dimensions and weight and handling the cable. SK04.02 Technical specification cable joints This refers to the supplier s technical specification, partially in words, of the design of the cable joint supplied, data sheets which present electrical, thermal and mechanical data, as well as information about dimensions and weight for complete joint housing. Applies to both transition joints and submarine joints. SK04.03 Technical specification cable termination The supplier's data sheet and drawings for component supplied. SK04.04 Technical specification ducting pipe The supplier s data sheet and drawings for product supplied. (Where appropriate). SK04.05 SK04.06 SK04.07 SK04.08 SK04.09 SK04.10 Technical specification hoses/pipes for communication cables Technical specification fibre-optic chambers or any other chambers Technical specification fibre-optic cables Technical specification cable current transformers Technical specification junction boxes and earthing boxes Technical specification cable ties, stripes or means of attachment for cable The supplier s data sheet/technical specification for pipes and/or hoses supplied The supplier s data sheet/technical specification for chambers supplied The supplier s data sheet/technical specification for fibreoptic cables supplied for communication or DTS The supplier's data sheet and drawings for component supplied. (Where appropriate) The supplier s data sheet/technical specification for component supplied The supplier s data sheet/technical specification for product supplied. Here, means of attachment refers to any cable clamps or equivalent at joint locations. See TR08-06 SK04.11 SK04.12 SK04.13 Technical specification equipment for temperature monitoring (DTS) Technical specification equipment for PD-measurement Technical specifications equipment for laying submarine cable The supplier s data sheet/technical specification for system solution supplied. The system s performance shall be specified. Shall be supplemented with a technical description. The supplier s data sheet/technical specification for solution supplied. Measurement performance etc. shall be specified. Shall be supplemented with a technical description The contractor s/supplier s technical specifications for cable laying vessel and other laying equipment such as ROVs, flushing equipment, ploughing equipment etc. SK04.14 Technical specification equipment for locating faults SK05 Material specifications The supplier s data sheet/technical specification for equipment supplied. Measurement performance etc. shall be specified. Shall be supplemented with a technical description

17 SK Submarine cable SK05.01 SK05.02 Document/Item Material specification protective filling Material specification filling material for pipe laying etc. Description The supplier s data sheet/technical specification for thermal material supplied. Screening curve shall be presented. The supplier s data sheet for bentonite mixture or equivalent supplied SK05.03 List of materials (MSDS) The supplier s summary of content declarations for relevant material included in cable and accessories. Primarily applies to insulating oils, any compound materials, plastics. SK06 List of suppliers SK06.01 List of materials suppliers A list of qualified suppliers of critical material, such as insulating oil, PEX-material, compound-material for joints etc. SK06.02 List of equipment suppliers A list of suppliers of accessories/equipment, such as SVLs, DTS systems etc. SK07 Photographs SK07.01 Photographic documentation of joint locations SK07.02 Photographic documentation submarine cables Photographs shall document locations for transition joints. The photographs shall be taken when the joint location is completed technically, but before protective filling/backfilling takes place. Relevant photographic documentation from submarine cable installation SK08 Earthing presentation SK08.01 Earthing description A comprehensive description of the earthing system s design. The description shall be sufficiently detailed to enable understanding of the technical construction. Integral components/equipment shall be specified. SK08.02 Earthing map Planimetric map in scale 1:2,000 of cable installation, earth wires and earth electrodes drawn in. (If relevant) File type JPEG JPEG SK08.03 Measuring protocol for step and touch voltages If this is required: Protocol which shows results of measurements performed of step and touch voltages incl. mapping of low voltage network SK09 Soil investigations SK09.01 Soil investigation records The results from any soil investigations performed in connection with cable coming onto land shall be presented here. Relevant investigations are surveying soil types, stability, investigation of ground resistivity etc. SK09.02 Records and reports from surveys and bottom surveys Results shall be presented from surveys performed, bottom surveys, dredging, hydrographical surveys etc. SK09.03 Marine biology investigations SK09.04 marine biology investigations SK10 Calculations SK10.01 Capacity calculations The supplier s calculation results for the expected thermal fan out for cable systems supplied, under given/assumed conditions. Likewise, results from calculation of the cable system s short-circuit resistance shall be presented. SK10.02 Mechanical calculations Any mechanical calculations performed within the framework of the project shall be presented here. It might, for example, involve calculations for dimensioning Hangoff. SK10.03 Geotechnical calculations Any geotechnical calculations performed within the framework of the project shall be presented here. For example, it might involve stability calculations to ensure carrying capacity. SK11 Measurements (not incl. in testing)

18 SK Submarine cable SK11.01 SK11.02 SK11.03 SK11.04 Document/Item Measuring protocol ground resistivity Measuring protocol compaction control Measuring protocol impedance measurement Measuring protocol earth electrode measurements Description Provided that such measurements are performed, results of measurements of the ground s thermal resistivity in [K m/w] before excavating the cable trench are to be presented here The results from measurements taken of degree of compaction in cable foundation and protective filling are to be presented here (Troxler-measurement or equivalent method) (If relevant). The results of measurements taken of cable joint s plus-, minus- and zero-sequence impedances after completion, but before commissioning, shall be presented here. To be performed by cable supplier or another party. In accordance with Svenska Kraftnät Excel template (modified for cable project). SK12 Technical quality documentation SK12.01 Inspection record Records from surveys and inspections performed are to be presented here. Relevant inspections are ongoing checks of work carried out, assembly work, as well as Final inspection, Operational inspection, Guarantee inspection. SK12.02 Measuring protocol thermal protective filling The supplier s records showing that the thermal sand supplied meets the set requirements are to be presented here. SK12.03 Measuring protocol bentonite filling The supplier s records showing that the thermal filling supplied (bentonite) meets the requirements are to be presented here. SK12.04 Records Type Test Records of type tests the supplier has performed on cable and all accessories included (cable joints) and components. Type test of complete cable systems shall be presented. Type testing of junction boxes and similar shall also be presented. The type test shall be performed according to Cigré Electra 171, Cigré Electra 189 and applicable IEC standard. For HVDC-cables testing shall be performed according to Cigré TB 496. File type xls/xlsx SK12.05 Records of Sample Test Records of sample tests performed by the supplier. According to applicable IEC standard. For HVDCcables testing shall be performed according to Cigré TB 496. SK12.06 Routine test Records of routine tests performed by the supplier. According to applicable IEC standard. For HVDCcables testing shall be performed according to Cigré TB 496. SK12.07 After Installation Tests Records of Sheath Tests (included in SAT) Records of sheath tests (DC) of complete cable systems the supplier has performed, as well as crossconnection systems where applicable. According to IEC SK12.08 Records of Phase Sequence Tests Records of phase sequence tests the supplier has performed. According to customary standards. Records of PD measurement Test records from PD measurements on all accessories fitted with PD sensors. If PD sensors are installed and performed according to the supplier s standard. SK12.10 Records Impedance measurement Test records from measurements performed by the supplier of plus-, minus- and zero-sequence impedance data. SK12.11 Records of AC-test (Operational test) Records of AC tests performed by the supplier. The test is to be performed according to applicable IEC standards and/or according to agreement. SK12.12 Records TDR (Time Domain Reflectometry) Records of TDR measurements performed by the supplier. SK12.13 Record OTDR of fibre optic cables Test records from OTDR-measurement performed by the installation engineer. Damping measurements shall be presented. SK12.14 ITP (inspection and test plan) Information test and quality control shall be implemented SK12.15 NCR (non conformance report) Deviation reports, ISO9001 SK13 Maintenance document SK13.01 Maintenance manual Cable system The supplier s specific advice and instructions for operation and maintenance of cable system supplied.

19 SK Submarine cable Document/Item Description SK13.02 Method description cable laying The installation engineer's/supplier s method description, specific advice and instructions for laying and misc. handling of power cable supplied. SK13.03 Method description cable splicing The supplier s description as a basis for correct assembly of cable joints (spare parts) supplied SK13.04 Method description fault localisation equipment The supplier s operational description for fault localisation equipment supplied. SK13.05 Repair agreement Cable splicing A repair agreement shall be signed with the cable supplier to ensure rapid access to repair staff and resources in the event of a cable fault. SK13.06 List of spares The supplier shall draw up a list of all spare parts (cable, joints etc.) which have been supplied. The document shall also include instructions for storage and handling of the spare parts, as well as information about the predicted useful service life. Information about where the spare parts are stored shall also be included in the list. SK13.07 Operation and Maintenance Instruction for DTS system Where appropriate: The supplier s specific advice and instructions for operation and maintenance of DTS equipment supplied. The instruction shall include operation of the system. SK13.08 Traceability documentation Records which detail which cable lengths (unique number) are installed where, ID no. of all joints, etc. installed shall be set out. File type 2.5 Explanations for document list submarine cable Explanations and clarifications of certain of the points in the document list according to the above are provided below. SK02.03 General plan cable route A general plan shall function as an overall document which clearly shows the cable installation's route. The general plan shall refer to underlying drawings. The type and number of the various underlying drawings shall be clearly set out on the general plan. The general plan shall be according to scale and drawn up in such a way as to clearly set out the cable connection s geographic location. At abutments, any roads, buildings, etc. in the vicinity of the cable route shall be shown. At sea, any intersections with other infrastructure and similar shall be shown. If legibility requires it, the general plan shall be divided into a number of drawings. See example in appendix 1. In addition the cable route shall be entered onto the relevant nautical chart. For example, see appendix 6. SK02.05 General plan land/water intersection and transition joints The drawing shall present an outline of the areas where submarine cables meet land, as well as present design and arrangement of transition joint locations. The locations of the joint housings shall be set out, as well as other equipment such as junction boxes, boxes for PD measurement etc. Any concrete enclosures or chambers for these boxes shall also be shown. If a concrete slab or equivalent has been placed in the jointing pit, this shall be shown. Arrangement for mechanical casing (anchorage of the submarine cables reinforcement (so-called Hang-off ) shall be set out in the drawing. SK02.06 Cross sections of installation close to shoreline Sectional drawings which show the cable trench's dimensions and the power cables positions in the excavated cable trench in catchment areas close to the shoreline and in excavated trenches between shoreline and joint location for transition joints shall be produced for the different installation configurations which arise. Sectional drawing shall as a minimum show:

20 Trench depth Trench bottom width Dimensions of protective filling (cable sand or equivalent) Depth of filling above the cables The power cables positions, with reciprocal distance between cables. Location of cable protection and warning mesh or equivalent Type of backfill/cable sand Type of surrounding ground (moraine, earth, clay, sand, mud etc.) Any surface layer over the cable installation Any reinforced cable protection, for example concrete slabs or similar. Location of any earth wires. Location of any fibre-optic cables/empty pipes for communication Location of any fibre-optic cables for temperature measurement (DTS) Each sectional drawing shall be marked with coordinates (starting point) according to Svenska Kraftnät s technical guideline for surveying, TR08-06, and shall also be given an ID-number. Coordinates shall agree with coordinates entered for the cable installation. The sectional drawing s starting point and ID shall be set out in the general plan. Each sectional drawing shall apply until reference to another sectional drawing is made. Direction in relation to the next sectional drawing that applies is governed by the surveying. Sectional drawings for joint locations and intersections with another infrastructure are dealt with separately. If installation in ducting pipes takes place in connection with submarine cables meeting land, see the requirements for pipe laying under the section on underground cable above. SK02.07 Cross sections for submarine cable The cross sections shall show normal configurations for installation close to the shore and for installation at sea. Sectional drawing for pipe laying shall as a minimum show: Laying depth in sea/lake bottom (if relevant) Location of any cable protection (including reinforced) and markings Type of backfill/cable sand and/or type of surrounding bottom material Location of any fibre-optic cables/empty pipes for communication Location of any fibre-optic cables for temperature measurement (DTS) Each sectional drawing shall be marked with coordinates according to the same principle as described under SK02-06 above. SK02.08 Detailed drawings of intersections with other mains Specific sectional drawings shall be produced in points where the cable installation is crossed by other mains, submarine cables or similar installations on the lake bed. Sectional drawing of intersection with other mains and submarine cables shall, in addition to the specification under SK02.06 or SK02.07 above, as a minimum also show: Position/location for intersecting mains/submarine cable/other Distance between power cables and intersecting infrastructure Type of mains, mains dimension and material. Where appropriate, voltage level. Number of intersecting mains (if more than one).