About us

ohv diagnostic – Expertise in high voltage diagnostic technology

Reliable data on the condition of power generation and distribution equipment is now more critical than ever. As a grid operator, you need dependable information in order to make practical decisions on maintenance and repairs. For example, you need answers to questions such as: “Is the insulation on our generators, cables, substations, and transformers operationally reliable? Do we need special inspection or handling procedures?”

This information is essential for developing maintenance strategies and for planning optimal technical and commercial investments. It also significantly reduces the risk of unplanned power supply interruptions.

Obtaining this information calls for comprehensive diagnostic measurements that allow the nondestructive assessment of grid conditions. Such measurements are technically demanding, however, and call for appropriate instrumentation, operational experience, and extensive know-how to evaluate the results. That is why you need the expertise and practical experience offered by the engineers at ohv diagnostic!

ohv diagnostic - years of experience in a young company

We founded ohv diagnostic GmbH in 2013 as a group of engineers with many years of experience in the industry. We develop and build modern measurement and testing systems, repair and upgrade existing equipment, and provide diagnostic measurements and other services.

In our young company, we manufacture testing and measurement equipment for diagnosing conditions of electrical operating equipment in medium and high voltage grids. Our top goals in development are maximum precision and easy operation.

Our product range is constantly growing, and includes DAC testing devices for medium and high voltage cables, probes, couplers, and accessories for partial discharge measurements, as well as customerspecific devices and systems. We also develop systems based upon your special requirements, build or repair OEM devices, and modify existing testing equipment.

We also support your operations with a variety of services. We perform diagnostic measurements for many types of operating equipment, and create a complete test report with recommendations for action. In commissioning projects, training courses, and seminars, your employees receive the tools they need to perform measurements on their own. Our range of services also includes calibration of instruments used for partial discharge measurement.

Training at ohv diagnostic

Since 2018, we have been an authorized training company for mechatronics technicians with support from the European Social Fund.

ESF Training support

Experience, knowledge, and creativity - our experts

With experience gained through countless on-site assignments, we understand requirements for test stations, laboratories, and high voltage substations. Our specialists have years of experience in diagnostic measurements, scientific studies, and the development of our own high voltage measurement and testing systems. At ohv diagnostic, we combine valuable knowledge from the fields of

  • manufactoring
  • power utilities and distribution
  • research institutions
  • assembly

We understand the challenges involved and can work together with you to find appropriate strategies and solutions. We integrate user experiences as we optimize our technical developments.

Our special focus is on reliable and meaningful measurement results for grid operation and asset management, combined with simple and easy-to-use designs. As practitioners, we also understand the importance of flexibility and cost-awareness in on-site service, so portability and an outstanding price-performance ratio are also vital criteria for our work. Comprehensive quality controls are an integral part of our company philosophy. ohv diagnostic is part of a network of international specialists. We do business worldwide. You too can profit from our outstanding expertise. We combine scientific know-how, technical expertise,and practical experience, all for your benefit!

Visit ohv diagnostic

  • 3 - 5 March, Middle East Energy Dubai
    Hall 1 Booth E26 (German Pavilion)


Our team

Thomas Strehl
 - Managing Director
Thilo Ihle
 - Managing Director, Director of Development
Christian Bernauer
 - Sales & Service Director