Zum Brook 19-21DE49661Cloppenburg
Phone:+49 (0) 4471 9494-0
Fax:+49 (0) 4471 84895
Professional services for all aspects of power distribution

As one of the leading service providers for energy and electrical engineering, we ensure the safe and trouble-free operation of our customers' systems.


The KOOPMANN Group is one of Germany’s leading energy and electrical engineering specialists. Our wind industry services: cable testing, power plant assembly, circuit breaker services, testing & diagnosis, transformer servicing, power centres, protection technology and operational management.

Our wind power sector services include comprehensive planning and project support, system assembly, maintenance, servicing, and repair as well as the supply of turnkey distribution and switching stations. We cover everything from the new installation of switching stations, cable lines and transformers up to 110 kV, to commissioning, repeat and protection testing to standards compliant grounding measurements and network analyses. We have invested in technical systems and personnel for our transformer service and have our own oil laboratory in which we carry out and evaluate all VDE oil analyses. Our mobile oil treatment plants enable us to carry out extensive on-site services on transformers of any size.

Our core competencies include cable testing and diagnosis.
Our equipment includes cable measurement and diagnostic vehicles, mobile systems including for pre- and post-location, PD measurement systems, HV testing systems up to 250 kV, the CPC 100 test system as well as devices for insulation, transformation ratio, winding resistance and dielectric frequency response measurements for transformer testing. Our cable test van, known as "The Beast", is equipped with the world's most powerful VLF testing facility for cables up to 100 km in length and 60 kV and includes an impact device for MV and HV cables. We also own a high-performance mensuration system housed in an ocean going container which is used for the precise location of cable faults both on- and offshore. We can also take on the operational management of energy and electrotechnical infrastructure systems.

Our team is available 24/7, is professionally and technically equipped, and will ensure the safe and long-lasting operation of your energy supply facilities.

more data:
  • Founded: 1982
  • Employees: about 340