Our Electrical & High Voltage teams provide electrical services for wind turbines since the early stages, covering installation, termination, testing, commissioning, and maintenance. From port assembly through field commissioning, we ensure all systems are installed and validated in accordance with project specifications, applicable standards, and safety requirements. With experience across major wind turbine technologies, we support projects across Europe, North America, and Asia.
With multi-platform experience and structured testing procedures, we ensure all electrical systems – from turbine to substation – are installed and verified in line with safety and performance standards. We cover the full electrical lifecycle, including installation, commissioning, and fault resolution.
We execute the installation and commissioning of medium and high voltage systems in accordance with defined safety and quality requirements. Scope includes HV cable pulling and termination, switchgear installation, protection and control system testing, and commissioning of turbine–substation interfaces. In addition, we support turbine installation activities across mechanical and electrical domains, including pre-assembly, completion works, functional testing, and final commissioning, followed by supervision and technical support during early operation.
When faults occur, we respond with fast, data-driven solutions. Our troubleshooting teams perform detailed diagnostic assessments to pinpoint the issue and carry out thorough root cause analyses to prevent recurrence. From minor electrical faults to major recovery operations, we handle repairs efficiently and implement preventive actions to strengthen future turbine performance and reliability.
We provide electrical commissioning expertise directly at the manufacturing stage, supporting OEMs with on-factory assembly and pre-commissioning processes. Our technicians oversee both mechanical and electrical completion, ensuring each turbine system meets design and quality requirements before it leaves the factory. Through dedicated supervision and quality control, we help manufacturers reduce rework and accelerate project delivery.
To maintain optimal performance and prevent costly downtime, we provide comprehensive maintenance and repair services for high-voltage systems. Our capabilities include HV switching operations, oil sample analysis, and protection relay maintenance. We also perform regular transformer and converter servicing and deliver rapid troubleshooting support to resolve issues safely and efficiently in the field.
Reliable power depends on rigorous testing and inspection. We use advanced diagnostic equipment — including high-voltage test sets, partial discharge testers, and VLF testers — to verify the integrity of every component. Our teams also conduct current transformer (CT) testing, protection relay verification, and grounding tests to ensure systems meet all safety and performance requirements.
As wind turbines age, performance optimization becomes key to extending asset life. Our teams deliver repowering solutions that include electrical upgrades, retrofits, and re-commissioning to align older assets with current technology and standards. From planning to project management, we ensure each upgrade enhances turbine efficiency, safety, and long-term reliability.
Wherever the wind takes us, we deliver trusted service, skilled teams, and lasting results for the global wind industry — driving a cleaner, more sustainable tomorrow.
Our electrical capabilities are strengthened by Endiprev, an MV/HV expert that joined Muehlhan Wind Service. Since 2009, they have completed 500+ projects worldwide, delivering technically excellent services for onshore and offshore wind. Our integrated teams provide high-quality commissioning, maintenance, and engineering solutions, backed by internationally recognized certifications and a strong safety culture.
Skilled professionals trained in the latest mechanical, electrical, and HSEQ standards to ensure quality and safety.
From pre-assembly to commissioning, we deliver every phase on time, within budget, and to OEM specifications.
Scalable teams and equipment tailored to each site’s requirements for smooth coordination and minimal downtime.
We bring consistent quality and compliance to every onshore and offshore project — wherever the wind takes you.
Explore 820+ completed wind projects across three continents and find your inspiration on our interactive map.
“We’reveryhappywithourcooperationwithMuehlhanWindService.Theirteambringsstrongtechnicalknowledgeandatrulycollaborativemindset,alwaysthinkingalongwithustofindthebestsolutions.Itwasalsoagreatadvantagethattheycouldprovidethenecessaryequipmenttoperformon-sitetesting.”
With proven experience in wind turbine high voltage systems, substations, and commissioning, Muehlhan Wind Service ensures every installation is executed efficiently and in full compliance with international standards. Whether you require full-scope electrical commissioning or targeted troubleshooting support, our certified teams provide the expertise, flexibility, and structure needed to maintain reliable turbine performance across the project lifecycle. Contact us to discuss your next project.