Keyword list

Detailed engineering – Within all our subject areas, we perform detailed engineering that forms the basis for how a project is to be carried out. Methodology will be somewhat different from service to service, but common to all our assignments is that thorough calculations and analyzes form the basis for all assessments and choices. We provide a declaration of conformity for all our projected facilities.

The transmission lines department performs mechanical calculations of lines, fittings, foundations and masts in steel, composite, aluminum, wood and glulam. Detailed engineering is performed in PLS-Cadd, PLS-Tower, PLS-Pole, ProLIN, SAP 2000, Autocad, Mathcad and in-house developed programs.

We also perform electromechanical design, including assessments of magnetic fields and creep current path depending on degree of contamination, corona effect and voltage coordination. Drawings are prepared in Tekla and AutoCad, including self-developed components for efficient modeling of steel masts in Tekla.

The Department of Energy guidance carries out detailed engineering with calculations in Paladin Designbase and its own programs. We perform electrical calculations of transformers, 0-point transformers, earth fault coils, reactors, switchgear and capacitor batteries.

The department for Substations projects cable and device systems in detail based on drawing in 2D Autocad or 3D Tekla Structures. An assessment is made of optimal line guides, and control of requirements for regulatory distances. Detailed engineering involves load calculations such as wind, ice, short circuit for rails, simplex, duplex or triplex liner. Line calculations are made in Prolin / PlsCadd.

Mechanical calculations of steel structures are made in SAP2000 and Idea Statica. Production material for steel structures is prepared in 2D Autocad / 3D Tekla Structures. We also make luminaire drawings and perform dimensioning based on creeping current path and mechanical loads. We also do quantity calculations and specifications for construction.

For building and station area, stability and strength calculations are made for the foundation. 2D and 3D construction drawings in Autocad / Tekla Structures are used for foundation work and concrete, including situation plan, foundation, drainage, cable routing, earthing network and smaller access roads. Design of concrete cells for transformer / coil / reactor. Quantity calculations and specifications for construction according to NS3420.

Pre-project – In a pre-project, we consider the choice of cable route and optimal location of the station system. This is done based on map material, public registers, climate loads, transport conditions, ground conditions, avalanche danger, flood danger, as well as safety during construction and operation. We have good partners for assessment of landslides and geotechnics. Common aids are ArcGis and PLSCadd.

Landowner agreements – We prepare landowner agreements, area calculations, maps and remuneration calculations.

High voltage electricity for industrial facilities – We have extensive experience with planning and design of energy-intensive industrial plants. This involves everything from impact and capacity assessments to environmental studies and detailed engineering.

Innovation – We contribute to the development of new equipment and solutions for the industry.

Earthing studies – We conduct earthing studies and prepare a grounding report for transmission connections and station facilities. Analyzes are performed in Paladin Designbase according to NEK 440: 2015, NEK 445: 2016 and possibly REN as a separate requirement from the customer.

Underground cable – In connection with the planning and design of ground cables, we assist with the optimization of route selection and ditch section mtp. transmission capacity and spatial conditions.

Overhead cable – When laying cable in air on steel structures, we perform mechanical dimensioning as a result of loads due to short circuit, dead weight and thermal expansion. We draw steel structures based on the necessary clamping, bending radius and availability for assembly, and calculate stability and draw a foundation. We also assess grounding conditions. We also assist with follow-up during the construction period with site-adapted measures.

Surveying – We have our own, very experienced surveyors for setting up mast sites, profiling on mast sites and controlling critical terrain points using a total station. We prepare maps, and the surveyors also assess ground conditions, safety and transport alternatives.

We also offer special services such as control of executed line stretches, arrow height for special spans, coordinate fixing of points for input to calculation programs, etc.

Land surveying is also used for assessments of the optimal location of transformer stations. The assessments are made based on ground conditions and mass balance. The competence is also used for assessment of foundation method – slabs on ground, foundation wall or piling.

Checking final documentation – We contribute with updating of technical documentation according to changes during the construction process.

Pegging of layout for foundation – Release of piles for mast placement. GPS and / or total station are used for this.

Competitive tender procedures – We conduct tender competitions with both request, evaluation, negotiations and contract. We ensure that the Public Procurement Act and the Supply Regulations are complied with. KGV tool – Tend Sign. When applicable, we also follow up delivery from order to FAT.

Control measurements – Accurate measurement of terrain, masts, line heights etc. To verify that the substrate is correct. Measurement is done using GPS, total station and / or laser scanner.

Laser scanning – An invaluable tool for collecting large amounts of data, such as mast and line data at transformer stations. And that it is easy to retrieve new measurements without the need for further trips out into the field.

With laser scanning, a point cloud is created which, if necessary, can be used to create 3D models with the desired level of detail. A point cloud can consist of several million points where all the points have x-, y-, and z-coordinates, the point clouds can be used to create a terrain model which in turn is used for projecting line routes, mass balance, construction pits etc.

For this purpose, Jøsok uses a Trimble SX12 with a range of up to 600m.

Mass calculation – Measurement and calculation of volume of masses to be moved for use in planning, temporary or permanent storage. For this, the integral and / or cross-profile method in Gemini terrain is used.

Cartography – The doctrine of making and using maps. It is an art to create maps that easily convey a message in an understandable way, regardless of whether you are talking to landowners or contractors. We use maps to produce data collected from fields, various digital map databases and the administration.

The maps are produced in ArcGis Pro, a map program with countless functions and Norwegian adaptations.

Landowner contact – Person responsible for the contact with landowners in planning, engineering and possibly construction period.

Ground lease agreements – Agreement between grid company and landowner for construction, operation and maintenance of high voltage systems.

Site quality / ground classification – Measurement of depth to rock with light or heavy assessment equipment. Used to determine the foundation method for masts and constructions, as well as a basis for mass calculation.

Terrain model – 3D model of the terrain. May include masts, lines and structures as well as vegetation. Through the project “National detailed elevation model”, the Norwegian Mapping Authority has collected elevation data for the whole of Norway that can be used for the production of terrain models. In addition to these measurements, we use laser scanners for more details.

Feasibility studies – Within energy consulting, a feasibility study involves a screening of grid alternatives based on technical feasibility and financial assessments. It includes the preparation of professional reports as a basis for government processing.

Feasibility studies often include assessments of upgrading or new construction of power line systems, cable systems, transformer stations or a combination of these.

For upgrading / new construction of a power line, a cable system or location of a new transformer station, buildability is considered. This depends on climate loads, terrain and environment, transport options, crossings and approaches to other infrastructure, compliance with regulatory requirements, the possibility of disconnections, safety during construction, etc. We make technical and financial assessments for the choice of mast types and lines and space requirements based on regulatory requirements and extensive experience from a large number of previous projects. Risk assessment is performed in accordance with FEF 2006 §2-2.

A feasibility study for upgrading transformer stations involves an assessment of the condition of the existing station. We then look at both concrete, steel and appliances, at the same time as we make an assessment of possible measures for rehabilitation / expansion. We are also considering current solutions mtp. space requirements, and looks, among other things, at compliance with regulatory distances according to current requirements. We make an overall assessment of optimal station design adapted to location and costs.

Consideration by the authorities – Submission, license applications and MTA plan.
Consideration by the authorities is a central and important part of what we do. Following an approved area license, we prepare submissions to public authorities according to our own set-up. We also have information meetings with landowners and public agencies.

A central part of this work is licensing. We prepare a license application according to NVE’s template and hold information meetings with landowners and public agencies. We have good partners in cultural monuments and biological diversity. We also prepare technical reports for input to the license application.

We prepare an Environment, Transport and Construction Plan (MTA plan) in accordance with NVE’s guide.

Grid connection – In accordance with current industry standards, we study capacity in the power grid, plan and design optimal solutions, where both natural conditions and environmental impact are mapped.

Follow-up during construction period – We often assist the network owner as an advisor in the construction process. This means that we ensure the quality of both material and work, as well as assist with FAT of, for example, transformers, coils, reactors and switchgear. We assist in construction meetings, adapt the projected surface, and contribute to the final inspection and takeover protocol. We also have experience with construction management.

Subsea cable – We have extensive experience with assessment, dimensioning and planning of both alternating and direct current subsea cables over short and longer distances.

System analysis – We carry out analysis on existing networks to examine capacity in relation to new needs. Analysis are performed in Paladin Designbase. Results will / can be used to identify the need for network reinforcements.

Tariff-setting and installation investment contributions – We prepare forecasts for marginal loss rates for withdrawal customers and production units. This is carried out in Paladin Designbase based on the customer’s statistics for consumption / production. We also calculate construction contributions according to «Regulations on control of network businesses». We make assessments of radial and meshed grids, impact and geographical distributions.

Condition monitoring – A condition monitoring involves an assessment of the remaining life of wires, masts and other components. We also make profitability assessments and compare, among other things, new buildings with rehabilitation. In some cases, assessment of immediate measures to satisfy regulations and to reduce any risk of accident will also be relevant. In our condition checks, both drones and mast top inspections are used.

Technical and financial studies – Based on identified opportunities / alternatives to meet the customer’s needs, we establish relevant comparison bases. This is based on construction costs and future running costs such as operation / maintenance and transmission losses.

Planning of route Planning of route is performed in PLC-CADD using terrain models. A preliminary project defines a route with intended mast sites, and the model is updated later according to survey data. PLS-CADD is used to design the route and ensure that the design is in accordance with, among other things, the Regulations on electrical supply systems and NEK445. In PLC-CADD, all relevant data is entered so that the output can be used in other analysis programs, and contributes to a high accuracy in further detailed design.

Jøsok Prosjekt has a large experience base to be able to derive and recommend different alternatives for a solution on a power line. Even if the design is carried out using a terrain model, the terrain and mast sites should be checked. Our surveyors use GPS-based surveying equipment, laser-based total stations with and without prism, and theodolites. In principle, we can thus perform all types of surveying assignments. Our surveyors also carry out route planning, which provides good interaction with the project engineer in the assignments.

Third-party verification – We often operate as an independent third-party in verifying selected solutions. This concerns both capacity and solution calculations, but also whether the proposed solution is in accordance with current regulations.

Visualization / BIM – Using tools such as PLC-Cadd, PLC-Tower, PLC-Pole, Photographs, Blender and Gimp, we visualize future power lines. Alternatively, this can also be done using PLC-Cadd and terrain model.

Transformer stations / switching stations are visualized using 2D principle sketches, but we also create 3D models of equipment systems and buildings using Tekla Structures + Revit by subcontractors. Terrain model placement is done in Gemini Terrain. We also provide input to coordination models for station facilities.