As an expert technology partner, we create safe and reliable pathways for electric power worldwide – and sustainable value for our customers. Agility, enthusiasm, and expertise are the core values we bring to life with our products and services. For decades, we have been driving high-quality innovations in high-voltage technology. And we’re not slowing down.
Taking a long-range view
At HSP, we are a technical innovator in the high-voltage sector, and we are enthusiastic about this task. Our customers’ benefit is our focus – and people are the center of all we do. As a responsible employer, fair business partner, and active member of global society, we are aware of our responsibility. We live up to it by communicating and acting authentically and reliably, with transparency and respect. The results of our efforts: innovative and sustainable solutions for a shared future on our planet. Thinking ahead and saving resources, we courageously shape the world of tomorrow.
Our aim is to offer our customers future-proof solutions – for sustainable benefits.
Hans Julius Gronau
Managing Director, HSP Germany
Where the future of energy begins today
HSP: Part of the Trench Group Legacy
HSP proudly stands as a vital member of the Trench Group, a hidden champion and global leader in high-voltage component manufacturing that powers the world's energy infrastructure.
As part of Trench's technology leadership in high-voltage direct current (HVDC) transmission, HSP Bushings provide the reliable and safe connections that make the energy transition possible. Our products don't just support power grids—they stabilize them, secure them, and help build the sustainable energy future the world needs.
We are aware of the challenges faced by our customers all over the world. That’s why, in addition to holistic and classic services, we also offer innovative product and service solutions to meet every need. Outstanding quality, far beyond the industry standard, is a matter of course for us. Just like the safety, durability, and sustainability of our products. Here, you can discover the many benefits of working with HSP.
As committed to our customers as we are to our products.
We are finding solutions today for the energy technology requirements of tomorrow – for a successful future full of opportunities.
Nils von Dietman
Managing Director, HSP US
Our milestones
The history of HSP begins in 1893, with the foundation of Meirowsky & Co in Cologne-Porz. In 1906, the company started manufacturing condenser bushings. Today, we are a global technology leader.
Use the arrows to navigate the timeline and explore the milestones of our history.
1913
Initial production of condenser bushings made of resin-bonded paper (RBP)
1920
Acquired by Felten & Guilleaume (F&G)
1950
Initial production of bushings using oil-impregnated paper (OIP)
1958
380 kV oil-impregnated transformer bushing with two-part outdoor porcelain housing
1960
Production of bushings using resin-impregnated paper (RIP)
1970
1200 kV oil-impregnated outdoor test bushing for continuous operation, installation can be transported by rail
1972
Oil-impregnated HVDC bushing with outdoor oil for Cahora Bassa plant
1977
First 420 kV RIP transformer GIS bushing for Reuter power plant in Berlin
1980
Launch of RIP bushings with silicone sheds directly vulcanized on, delivery of 145 kV outdoor GIS bushings
1987
First 420 kV GIS outdoor bushings, condenser bushing with silicone sheds
1989
F&G high-voltage equipment business is spun off into the newly founded HSP Hochspannungsgeräte Porz GmbH
500 kV HVDC OIP transformer and wall bushings for the Gezhouba–Shanghai system in China
1997
First dry versions of 500 kV HVDC RIP transformer and wall bushings for the Tian–Guang system in China, with silicone composite housing
2005
Development and production of 1000 kV AC & 800 kV DC bushings
2007
Move to Troisdorf, Germany. The new location has a UHV AC & DC test facility. Company name is changed to HSP Hochspannungsgeräte GmbH
2008
1200 kV RIP test bushing, indoor/SF6
2009
First dry version of 800 kV HVDC RIP transformer and wall bushings for the Yunnan–Guangdong system in China
2012
Development and production of 1200 kV AC (RIP) & 1100-kV DC (RIP) bushings
2013
Development and production of 800 kV DC 4800A (heatpipe RIP)
2014
Initial production of bushings made from resin-impregnated synthetic (RIS)
2017
Development and production of 1200 kV DC (RIP) transformer bushings
2023
First dry version of 550 kV HVDC RIS transformer bushing
2024
HSP is part of new established Trench Group
2025
Opening of new bushing manufacturing facility in Toronto, Canada
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