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Zum Brook 19-21DE49661Cloppenburg
Phone:+49 (0) 4471 9494 0
Professional power generation service

As one of the leading service providers for energy and electrical engineering, we ensure the safe and smooth operation of our customers’ systems and plant.


The KOOPMANN Group is one of Germany’s leading energy and electrical engineering specialists. Our wind industry services include cable mensuration technology, power system installation, circuit breaker services, testing & diagnosis, transformer servicing, power centres, protective systems, and operational management.

Our wind energy 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 standard-compliant grounding measurements and network analyses. We have invested in technical systems and staff 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 services on any transformers on site.

Our core competencies include cable testing and diagnostics.

Our equipment inventory includes 14 medium-voltage cable measurement and diagnostic vehicles as well as a test facility with an output voltage of 260 kV AC for testing high-voltage cables. The KOOPMANN Group also operates a range of mobile metering devices for testing and diagnosing switchgear, insulation, transformation ratio, winding resistance, and dielectric frequency response measurements for transformer testing purposes.

We currently own the world’s most powerful VLF testing facility for standard-compliant on-site cable testing up to an operating voltage of 33 kV and a length of up to 100 km. We also have a high-performance fault location system housed in a seaworthy container, which is used for the precise location of on- and offshore cable faults. We can also take on the operational management of energy and electrotechnical infrastructure systems.

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

more data:
  • Founded: 1982
  • Employees: 400