Dipl.-ing. H. Horstmann GmbH is a family-run electrical engineering company founded in 1946 in Heiligenhaus, near Dusseldorf, Germany.

A great willingness to innovate and invest helped Horstmann GmbH to evolve into a business now active worldwide. Its research and development department, with over 25 employees, works continuously to improve existing products and develop new ones to meet requirements in rapidly changing networks. New and refined products and system solutions are tested for durability under the most extreme climatic conditions on a multitude of state-of-the-art testing and measuring devices.

Alongside short-circuit and earth fault indicators and voltage detecting systems, also the earthing devices for medium voltage are part of the portfolio. The product range is rounded off by remote monitoring solutions. As a result, Horstmann GmbH offers its clients, not just products, but system solutions too.

The products and system solutions of Dipl.-Ing. H. Horstmann GmbH are being used successfully in more than 100 countries and are helping to plan the grids of the future.

Explore the company's products and solutions

Fault indicators for overhead lines
Fault indicators for underground cables
Voltage presence detecting and indicating systems and voltage detectors
Insulated operating rods
Earthing and short-circuiting devices