Electrical Installations Design and Consultancy

Electrical installations design and consultancy service includes determining the energy needs of a facility, designing the electrical infrastructure correctly, carrying out technical calculations, following official authority processes and engineering control of implementation and commissioning stages. As Pow-Sys Power Systems, we provide electrical installations design and consultancy services across Türkiye for industrial facilities, factories in organized industrial zones, power generation plants, transformer substations, large commercial buildings and infrastructure projects. For related context, see High Voltage Installations Engineering and Consultancy.

Proper design of electrical installations does not only mean preparing drawings. The installed power, demand power, load characteristics, production continuity, maintenance needs, capacity increase plans, voltage level and official authority requirements of the facility must be evaluated together. For this reason, in the electrical design and consultancy process, we handle technical calculations, site conditions and operational needs as a whole. For related context, see Electrical Engineering Service and Technical Consultancy.

Before starting project studies, a site survey and existing condition analysis are carried out. Transformer substations, MV switchgear, low-voltage panels, cable routes, generator systems, compensation panels, grounding installation, metering circuits and existing project documents, if available, are reviewed. This preliminary assessment is the basic step for correctly determining the existing capacity of the facility and the need for a new investment or revision. For related context, see Electrical Installation Periodic Inspection and Conformity Report.

The design process for LV, MV and HV electrical installations must be planned according to the operating conditions of the facility. In low-voltage systems, panel, cable, lighting, socket outlet, machine feeder, compensation and grounding details come to the forefront, while in medium-voltage and high-voltage installations, transformer substations, MV switchgear, circuit breakers, disconnectors, protection relays, metering systems, cable terminations, busbar connections and switching safety become more critical. For related context, see High Voltage Operation Responsibility Service.

Within the scope of electrical installations design, single-line diagrams, load lists, cable sizing calculations, voltage drop calculations, short-circuit calculations, load flow analyses, panel and transformer layout plans, MV switchgear arrangements, grounding calculations and implementation projects can be prepared. When required, different project documents such as preliminary design, final design, implementation project, revision project and as-built project can also be prepared.

Short-circuit calculation, load flow analysis and voltage drop calculations are among the most important technical steps in the electrical installations design process. These calculations are required for correct selection of transformer capacity, circuit breaker ratings, cable cross-sections, busbar systems, panel capacities and protection equipment. Equipment selected without proper calculations may cause unnecessary trips, voltage problems or safety risks during operation.

In an electrical installations design and consultancy study, each calculation is connected to the real load information and site conditions of the facility. Short-circuit, load flow, voltage drop and relay selectivity outputs are reported in a format that can be used in equipment selection, authority approval files, implementation control and commissioning planning.

Relay selectivity and protection coordination studies ensure that the system responds correctly during faults in electrical installations. The aim is to clear the fault only at the relevant point, prevent unnecessary outages and keep critical loads energized as much as possible. In this scope, short-circuit results, relay curves, circuit breaker characteristics, transformer data and facility operating scenarios are evaluated together.

In facilities with transformer substations, design and consultancy require a more comprehensive engineering approach. Selection of MV switchgear, transformer capacity, cable entries and exits, busbar connections, metering and protection circuits, grounding system, maintenance access, switching areas and safety clearances are reviewed separately. When designing a transformer substation, not only the initial investment cost but also long-term operation and maintenance convenience are considered.

Grounding, compensation and power quality studies are also important parts of the electrical installations consultancy process. The grounding system plays a critical role in life and facility safety. The compensation system affects reactive power balance and energy costs. Harmonics, voltage fluctuations and power quality problems may create risks for production continuity. Therefore, these topics should be evaluated together during the project or revision process.

Within the scope of electrical project consultancy, not only design and calculation studies are carried out; whether the implementation process proceeds in accordance with the project is also checked. Cable routes, panel connections, cable cross-sections, MV switchgear layout, transformer connections, labeling, grounding connections, metering circuits and protection equipment are inspected on site. Conditions that do not comply with the project or may create operational risks in the future are reported in writing.

TEDAŞ, relevant distribution company processes, TEİAŞ and EMO processes form an important part of electrical installations design and consultancy services. Project files must be prepared correctly, authority revisions must be followed, application documents must be completed without deficiencies, official acceptance files must be prepared and technical checks must be carried out before acceptance. During authority approval and acceptance, the Electrical High Current Installations Regulation, distribution company practices and connection/acceptance expectations are evaluated together. Incomplete or incorrectly prepared project documents in these official processes may cause time loss and additional costs during the investment process.

Technical specifications, quantity take-off, bill of quantities, estimated cost, equipment selection and implementation control are also important for correctly managing investments in electrical installations. Especially in industrial facilities, cement plants, iron and steel facilities, mining facilities, petrochemical plants, port operations, automotive plants and production-line businesses, the electrical infrastructure directly affects production continuity.

During commissioning, tests, measurements and functional checks are carried out to verify that the system operates in accordance with the project. Transformer, MV switchgear, protection relay, grounding, continuity, metering circuits, compensation and, when necessary, power quality measurements are evaluated. These studies are important for safely putting the facility into operation and creating reference values for future periodic inspection works.

Electrical installations design and consultancy service may be required in many cases such as new facility investments, transformer capacity increases, machinery park expansion, generator integration, solar power plant connection, MV switchgear renewal, panel revision, power quality problems, frequent tripping faults, capacity increase or regulatory compliance needs.

The following example is an anonymized field scenario prepared without sharing the customer or facility name. Its purpose is to show clearly what information is collected on site, which analyses are carried out and which outputs are produced during an electrical installations design and consultancy study.

Facility type: a privately transformer-fed OIZ production facility around Bursa. The anonymized shareable field range was evaluated as 34.5 kV voltage level, 1,250-1,600 kVA transformer capacity, approximately 120-150 m cable route, 4 MV switchgear cubicles and 2 main low-voltage panels.

Problem: The existing single-line diagram was not fully aligned with the site; transformer capacity, panel feeders, cable route and authority approval requirements for the new machine loads had not been clarified. The business wanted to see the technical scope and possible risks before starting the investment.

Analysis performed: Installed power, demand power, transformer loading, MV switchgear arrangement, cable sizing, voltage drop, short-circuit level and preliminary relay selectivity were reviewed together. The single-line diagram, load list, project revision and site control headings required for the authority acceptance file were also identified.

Output: Single-line diagram headings requiring revision, technical calculation parameters, pre-implementation checklist, missing document notes for authority approval, risk priority and follow-up items were reported.

Result: The investment scope became clearer in terms of drawings, calculations and authority process; panel, cable and transformer capacity checkpoints were separated, and technical decisions before implementation became more traceable.

This content is technically reviewed by Huseyin COKAL for electrical installations design, high-current installations, authority approval and technical reporting topics. When regulations, authority practices or acceptance processes change, the relevant section is re-evaluated; if outdated information is identified, the content is updated and the service scope is clarified again through a site survey.

During the quotation process, the facility type, installed power, demand power, transformer capacity, number of MV switchgear units, panel structure, machinery list, existing single-line diagram, current project status, site distances, authority approval requirement, implementation control scope and commissioning support are evaluated together. This allows us to prepare a phased and clear engineering proposal that reflects the real technical scope of the project, rather than only a general price.

Pow-Sys Power Systems approaches electrical installations design and consultancy service not only as a drawing preparation process, but as a technical engineering study carried out to make the facility safe, sustainable and suitable for long-term operational needs. Our goal is to improve energy continuity, manage official processes correctly, reduce implementation errors and make your facility’s electrical infrastructure reliable.

For electrical installations design and consultancy, LV/MV/HV project design, transformer substation design, short-circuit analysis, load flow, relay selectivity or authority approval processes, you can share your facility information and request a project-specific comprehensive engineering evaluation.