It all starts at the power plant.
The power of wind, sun or water is turned into electricity at the power plant. But this energy is not yet ready to reach your home.
Energy projects · contracting · consulting
The engineering behind the light.
The light in your home starts its journey at a power plant, kilometres away. We build the last and most critical part of that route, the part that enters your building.
It gains strength for the long journey.
Transformers at the plant output raise the voltage of the electricity. Just as water pressure carries it over long distances, the energy can cross hundreds of kilometres with little loss.
From city to city, on giant pylons.
High voltage lines connect power plants across the country to the cities. The national grid operates this energy highway and brings the energy to the edge of the city.
This is where YA-KA's work begins.
The high voltage reaching the city is stepped down at transformer substations to a level that can be distributed to neighbourhoods. We design, build and safely commission these substations.
YA-KA scope of workFrom underground, to your building's door.
Energy reaches your street through underground cables; the transformer kiosk next to the building steps the voltage down to a level your building can use. From excavation and cable pulling to the kiosk and its connection, we are on site.
YA-KA scope of workThe right amount to every flat, safely.
The main distribution board shares the energy to the floors, and from the floors to the flats; in a fault it cuts only the affected section and protects the rest. We prepare the design of these boards and carry out their installation and connections.
YA-KA scope of workAnd the light comes on.
Pressing the switch is the last step of this long journey. That it looks so easy is proof that the work behind it was done right.
YA-KA scope of workScroll to follow the path of energy
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Behind the light
Behind every switch is an infrastructure that is properly designed and safely operated.
Energy reaches the switch from the grid through a chain of six links. The part of this chain that falls to your building, from the transformer substation to the switch, is our work.
- Grid34,5 kV
- Transformer substation34,5 / 0,4 kV
- Main distribution board400 V
- Floor board400 V
- Apartment board230 V
- Switch230 V · light on
01 · About us
Your reliable partner in electrical infrastructure since 1999.
Founder and General ManagerKemal ÖztelElectrical and Electronics Engineer
Founded YA-KA Mühendislik in 1999 and now runs it as general manager.
YA-KA Mühendislik is an energy projects, contracting and consulting firm founded in İstanbul in 1999. Across Turkey and abroad, we design, install and maintain the electrical infrastructure of commercial, industrial and public buildings.
From hospitals to universities, from historic buildings to factories, we have successfully completed over 500 projects. Alongside electrical work, we carry out heating systems, air conditioning and construction contracting under the same roof.
Company profile
- Founded
- 1999, İstanbul
- Headquarters
- Ataşehir, İstanbul
- Founder and general manager
- Kemal Öztel, Electrical and Electronics Engineer
- Area of operation
- Turkey and worldwide, primarily İstanbul
- Fields of activity
- Energy projects, contracting and consultingMV/LV power distribution and transformer substations, distribution and reactive power compensation boards, lighting, generators and UPS, fire detection, security and extra-low-voltage systems, earthing and periodic inspection
- Heating systems and air conditioningCentral heating, natural gas installations, air conditioning and VRF systems
- Construction contractingRenovation, decoration and project management
- Foreign tradeSupply of electrical materials
- Trade name
- YA-KA Mühendislik Isı Sistemleri İnşaat Taahhüt ve Dış Ticaret Ltd. Şti.
Selected milestones
27 years, over 500 projects.
- 1999Founded
YA-KA Mühendislik was founded in İstanbul.
- 2008Healthcare
Türkiye Yüksek İhtisas Hastanesi: 924 fire detection elements and CCTV with 101 cameras.
- 2009Historic building
All electrical installation and lighting in the restoration of the Dolmabahçe Camii.
- 2013Infrastructure
Turnkey electrical works for the management and control offices of the 3rd Bridge construction site.
- 2014Healthcare
GATA: renewal of distribution boards and power cables, distribution board rooms and SCADA system.
- 2024Industry
Earthquake strengthening project at the Linde Gaz Gebze 1 ASU facility, tank electrical works and relocation works.
- 2025Industry
İstanbul Silah new building: 1,600 kVA transformer installation in a concrete kiosk and busbar distribution.
- 2026Today
Energy projects, contracting and consulting services continue under the management of Kemal Öztel.
We start every job on site: we measure, we listen, then we design.
- 01We measure
We measure and record existing distribution boards, cables and loads on site.
- 02We listen
We clarify your needs, plan and schedule with you.
- 03We design
Based on the measurements and your needs, we prepare an energy project that can be implemented on site.
Site survey · review of measurements, needs and plan
In design, on site, in maintenance: the same team.
02 · How we work
Our working principle. Site survey, design, installation, testing and maintenance: one team carries out every stage of the work. Information does not change hands, responsibility is not divided. From the start of the project to the end, you have the same point of contact.
- One contractFrom design to maintenance
- One point of contactYou know who to call when you have a question
- The same teamThe team that prepares the project also works on site
In the fragmented modelWith YA-KA
separate parties
Four separate companies and four separate contracts for design, installation, testing and maintenance. Information is lost and responsibility blurs at every handover.
team
One contract and one point of contact from design to maintenance. When you have a question, you know who to call.
You
03 · Process
01 / 06Six steps, from site survey to after-sales.
Design
01
01 · Site surveySite
01Survey and analysis
We inspect the site, measure the existing infrastructure and define the need together with you. The site survey is free of charge.
Delivered to youSite survey report and requirements list
02 · DesignCalculation and design
02Design
Load and short-circuit calculations, single-line diagram and power installation projects in line with the standards.
Delivered to youSingle-line diagram and execution project
Installation
03
03 · ProcurementMaterials
03Material supply
We select and procure distribution boards, cables and other equipment according to the project, and plan delivery to site according to the work programme.
Delivered to youMaterials list
04 · ExecutionInstallation
04Site execution
Installation of cables, busbars and distribution boards; a tidy, labelled and documented installation.
Delivered to youAs-built drawings
Testing
05
05 · TestingCommissioning
05Testing and commissioning
After measurements and protection tests, we complete the official acceptance procedures and hand over the power safely.
Delivered to youMeasurement and test reports
Maintenance
06
06 · SupportMaintenance
06After-sales
Periodic maintenance, measurement and reporting. Technical support continues as long as the system is in operation.
Delivered to youMaintenance schedule and periodic reports
04 · Services
From power to security: all electrical systems of a facility.
From medium voltage transformer substations to lighting, from fire detection to uninterruptible power systems, we design, install, commission and maintain all electrically powered systems of the facility.
VoltageNo power
Transformer and switchgear systems
We design, install and commission the systems that step the medium voltage from the grid down to a level your facility can use.
cos φ0,72
Distribution and compensation boards
We install and commission the main distribution, floor and compensation boards as one system. The compensation working with the board balances reactive power and avoids reactive power charges on the bill.
Lighting0 / 12 on
Lighting systems
From the inside of a building to its façade, from the car park to the square, we install lighting systems that deliver the right light to the right place efficiently.
Power sourceGrid connected
Uninterruptible power systems
When the power is cut, critical areas such as operating theatres and server rooms are not left in the dark even for a moment; the generator steps in and carries the entire facility.
Fire alarm systemNormal
Fire detection and warning systems
The moment smoke is detected the alarm sounds, floor guidance shows the nearest exit and card-access doors open automatically.
Lightning protectionReady
Earthing and lightning protection systems
We channel the power of lightning from outside the facility to the ground; people and equipment inside stay safe. We report the measurements with EMO (Chamber of Electrical Engineers, Turkey) approval.
05 · References
Scroll or selectOur featured references.
- Location
- Beşiktaş, İstanbul
- Building type
- Historic building · restoration
- Scope
- Restoration electrical works
- Work carried out
- Renewal of the entire electrical installation and the indoor and outdoor lighting within the restoration; sound, camera, security and fire alarm systems.
06 · All references
Our reference map.
The distribution across cities of the 128 references we selected from over 500 projects. Start by tapping a city on the map; you can see all of them year by year in the list below.
Cities we work in
Tap a city on the map or in the list; the featured projects in that city open here. Map positions are approximate.
Chronological list
Our references, newest to oldest, year by year.
You can filter the list by sector or search by institution, city or type of work.
Service:
No reference matches this search. Try another word.
07 · Sectors
Every building has its own rules.
We have worked in six building types. Tap a sector to filter the chronological reference list by that sector.
Experience earned on site.
1999Year founded
500+Projects completed
16cities15 provinces in Turkey and Erbil abroadİstanbul Ankara Kocaeli Bursa Adana İzmir Balıkesir Tekirdağ Denizli Bilecik Kırıkkale Eskişehir Edirne Malatya Burdur Erbil
1000+Inspection and measurement
Proven references
Facilities that allow no error, such as GATA, Boğaziçi Üniversitesi, Galatasaray Lisesi and Dolmabahçe Camii.
Authorisation certificates
Authorisation certificates for electrical, construction and natural gas installation work.
Design and site together
The team that prepares the project also carries out the installation on site; there is no gap between design and execution.
Large-scale work
924 fire detection elements in a single hospital, data infrastructure for 1,300 users in a 13-storey building, 6.7 km of overhead line.
Calibrated measurement, reported inspection
We carry out the periodic inspection of LV earthing installations with calibrated instruments and report according to TS HD 60364 principles.
09 · Contact
Let's talk about your project.
Fill in the form or call; our technical team will get back to you within 24 hours.
Reply within 24 hoursSpecialist technical teamFree site survey