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The installation of electrical systems, transformers, energy distribution, and compensation systems forms the core infrastructure of facilities where uninterrupted power supply is critical, such as factories, workplaces, banks, and hospitals. These projects are not only technical solutions that ensure energy transmission and distribution, but also the most critical components of safety, efficiency, and uninterrupted service. The systems to be installed in such facilities must be properly designed, compliant with national and international standards (TSE, ISO, IEC), supported by precise load analyses, and equipped with professionally designed transformer and compensation infrastructures.

Even the smallest disruption in the electrical infrastructure can lead to serious losses in factories where production must not stop, in banks where data security is critical, in offices where workflow continuity is essential, and in hospitals where human life is directly at stake.

For this reason, electrical installations, transformers, and distribution systems must be installed by expert teams. Such an approach ensures system safety, improves energy quality, reduces costs by optimizing reactive power balance, minimizes fault risks, and provides businesses with a sustainable operational infrastructure. Gazi Coşkun Elektrik explained the installation processes of electrical systems and medium-voltage (transformer) infrastructures, the operating principles of these systems, pricing structures, and frequently asked questions.

Why Are Electrical Installations and Medium Voltage (Transformer) Systems Necessary?

Factories, hospitals, banks, and large-scale commercial enterprises generally require high energy consumption. In these facilities, a standard low-voltage (LV) network alone is often insufficient. High power demand, voltage drops that may occur over long distances, and operational continuity requirements make a more advanced energy infrastructure essential. In such facilities, energy is generally supplied at medium voltage (MV) levels and converted into usable levels through transformers installed on-site. Medium-voltage transformer installations help ensure more efficient energy transmission, reduce losses, and enable safer system operation.

Safe, Efficient, and Sustainable Energy

Electrical installations cover not only energy distribution but also many important components such as lighting, power systems, backup solutions (generators and UPS systems), grounding, and protection systems. Especially in facilities such as hospitals and banks, where interruptions are unacceptable, these systems are designed in accordance with high safety and continuity standards. Medium-voltage (MV) infrastructure and properly designed electrical installations ensure that large-scale enterprises meet their energy needs safely, efficiently, and sustainably.

How Does a Medium Voltage and Transformer System Work?

Medium-voltage (MV) installations ensure that the medium-voltage energy supplied by the electricity distribution company (generally 15 kV or 34.5 kV) is safely received, controlled, protected, and converted into usable levels within the facility. The main components of this integrated system, which covers the transmission, distribution, measurement, and protection of energy, are as follows:

Energy Input and MV Switchgear Cells: Modular structures consisting of circuit breaker, disconnector, and measurement cells that receive medium-voltage energy from the grid and ensure the control and protection of energy.

Power Transformer: The main equipment that reduces medium-voltage energy (for example 34.5 kV) to low-voltage levels suitable for facility use (400V / 230V).

Concrete Kiosk or Transformer Building: Structures designed in accordance with safety, ventilation, and operational standards to protect transformers and MV switchgear equipment from environmental conditions.

Medium Voltage Cables: Generally XLPE-insulated underground power cables that ensure the safe transmission of energy from the grid to the transformer and throughout the facility.

What Is Electrical Installation and Infrastructure Setup?

Electrical installation and infrastructure setup is an integrated infrastructure that ensures the safe, orderly, and uninterrupted distribution of energy reaching the facility at low-voltage (LV) levels to all units. This installation requires a wide range of technical processes, from energy distribution and protection systems to cable infrastructure and lighting systems. The main elements of this structure are:

Main and Sub Distribution Panels: Central systems that ensure the controlled and safe distribution of electrical energy to different sections of the facility. These panels secure the system through protection equipment such as fuses and circuit breakers.

Reactive Power Compensation Systems: Systems that improve energy efficiency by balancing the reactive power drawn from the grid while also preventing possible penalty charges.

Cable Management Systems: Cable trays, ladders, and channels that contribute to the organized, safe, and accessible routing of electrical lines.

Grounding and Lightning Protection Systems: Systems that include grounding infrastructure to ensure human safety and protect electrical equipment, along with lightning protection methods such as lightning rods and Faraday cages.

Lighting and Socket Installations: Includes energy-efficient lighting systems suitable for the facility’s needs, as well as socket and power lines that supply machines and equipment.

What Are the Installation Processes of Medium Voltage (Transformer Substation) Systems?

Medium-voltage (MV) transformer substation installation is a comprehensive engineering process that ensures grid electricity is reduced to the appropriate voltage level and distributed safely and efficiently in facilities with high energy demand. This process consists of multidisciplinary technical and administrative stages, from project design to commissioning.

• Power Analysis and System Design

The facility’s current and future energy needs are determined. The transformer capacity is selected by calculating the maximum demand power (kVA). The MV connection point, short-circuit levels, and grid compatibility are evaluated. MV/LV single-line diagrams and project drawings are prepared by electrical engineers.

• Official Procedures and Project Verification

Official procedures are carried out to ensure the legal and technical implementation of the project. Within this framework, applications are submitted to the distribution company to obtain the required power allocation (connection approval). Electrical projects are reviewed and approved by the relevant local electricity distribution company if found suitable.

• Infrastructure Preparation and Site Construction

The areas where the equipment will be installed are physically prepared. The construction of the concrete kiosk or transformer building is completed. Channels (trenches) for underground cables are excavated and installed. Basic grounding and equipotential bars are established for facility safety.

• Procurement and Installation of System Equipment

Switchgear equipment (circuit breaker and measurement cells, etc.), power transformers, and main distribution/compensation panels to be used in the system are transported to the site and installed in accordance with technical standards.

• Quality Control Tests and Energization

Electrical tests are carried out to ensure the system operates safely and efficiently. Cables and equipment are checked. Overcurrent and earth leakage relays are adjusted. Dielectric strength tests (AC or DC) are performed on oil-filled transformers. After all inspections are completed, the facility is connected to the grid.

• Operational Responsibility and Periodic Inspections

After installation is completed, an operational supervisor is appointed as a legal requirement. It is mandatory to have an operational supervisor in high-voltage (HV) facilities. Annual periodic inspections, switching operations, and supervision of safety measures in the transformer substation are carried out by the responsible engineer.

What Does Industrial Electrical Infrastructure Include?

In industrial facilities, electrical energy is distributed at low-voltage (LV) levels from the transformer substation and safely transmitted to different units. This infrastructure consists of the following main systems:

• Main and Sub Distribution Panels

Main systems that ensure the safe distribution of electrical energy to different sections of the facility and include protection elements such as fuses and circuit breakers.

• Reactive Power Compensation Panels

Systems that balance the reactive energy drawn by industrial facilities from the grid, preventing penalty charges and relieving the grid load.

• Cable Management Systems

Provide organized and safe cable routing through cable trays, ladders, and channels.

• Grounding and Lightning Protection

Includes grounding systems for human safety and equipment protection, as well as lightning rod and Faraday cage solutions.

• Lighting and Socket Installations

Consists of energy-efficient lighting systems and socket lines that meet power requirements in industrial areas.

How Are Medium Voltage and Electrical Installation Prices Determined?

Medium-voltage (MV) and electrical installation prices are determined based on several key factors according to the facility’s energy needs and the project scope. The most important factor in pricing is the facility’s total installed power (kVA) and, accordingly, the technical capacity and quality level of main equipment such as transformers, MV cells, circuit breakers, and generators. In addition, the physical conditions of the project site directly affect costs.

Ground structure, cable route lengths, excavation, and infrastructure works can significantly alter the total budget. Engineering services also make up an important portion of the pricing. Processes such as project design, electrical calculations, schematic drawings, and system design, as well as approvals from EDAŞ/TEDAŞ and related institutions and EMO procedures, are included in the cost. Furthermore, tests, acceptance procedures, and on-site inspections carried out during system commissioning are also among the total cost items.

In Which Cities Does Gazi Coşkun Elektrik Provide Medium Voltage and Electrical Installation Services?

Adana-based Gazi Coşkun Elektrik provides medium-voltage distribution, installation, and electrical contracting services for factories, hospitals, banks, and workplaces throughout all provinces of Türkiye.