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HSP & Trench Bushing Group - Premium High Voltage Bushings

HSP & Trench Bushing Group is your partner of choice when looking for premium high voltage bushings. The Group develops and produces quality tailor-made products and services such as bushings for transformer, switchgear, generator, HVDC and SF6-applications up to the highest service voltage. Furthermore, they offer service, maintenance and customer training expertise for HSP & Trench equipment as well as for bushing from other manufacturers.


Customers substantially benefit from the close cooperation in terms of innovation, joint research & development and common designs for AC and DC bushings up to 1200 kV. By consistently maintaining the highest quality standards, HSP & Trench bushing group has become a leader on the world market for high voltage bushings in recent decades.

Technologically highly qualified bushings

HSP & Trench bushings are developed and manufactured in all technologies available on the market. According to your needs, the bushings are made of resin impregnated paper (RIP), oil impregnated paper (OIP), resin impregnated fiberglass (RIG) or resin impregnated synthetic (RIS).

Bushings are available with a variety of external insulation materials including porcelains in brown or grey, epoxy-resin for indoor applications and composite silicone insulator for heavy pollution or high seismic areas. Technologies for RIP and OIP bushings have been successfully in service for more than 60 years.

In addition to standardised products, the bushing group also offers individual customized products. All products are manufactured using state-of-the-art production methods, most of which they have developed internally and tested in fully equipped, internationally accredited test facilities.

The bushings are designed and manufactured according to the latest issue of IEC 60137 and other international standards for transformers application, e.g. IEEE.


HVDC Transformer bushings

Due to the rising demand of electricity all over the world, high voltage transmission systems are needed more than ever. For this reason the bushing group provides outstanding products as condenser graded bushings for HVDC transmission up to 1100 kV and for seismic applications with composite insulators and silicone rubber sheds.

Reliability: Certificated according DIN EN ISO 9001, ISO 14001 and OHSAS 18001

The bushing group's reputation for product quality has never changed, something that has been appreciated all over the world. This has resulted from the application of specialist know-how, modern production methods adapted to suit specific material requirements and a staff commitment to high quality and the extensive test programs in their works. The bushing group offers reliability and security of its products and also guarantees their future. This is evidenced by the Certificate according DIN EN ISO 9001 and 14000.

Furthermore, Group objectives are to preserve the health and the safety of their workers. For this reason safety management under OHSAS 18001 has been introduced. The Group commitments are founded on the basis of the regulations, all other applicable requirements and on continuous improvement initiative in the areas of the safety.


Production locations and sales offices

With more than 650 employees the bushing group operates globally from their production and sales locations in Troisdorf (Germany), St. Louis (France), Shenyang (China) and Pickering (Canada). Additionally, the bushing group is working with several sales providers, agents and distributors worldwide.



HSP Hochspannungsgeräte GmbH (Headquarters)
Camp-Spich-Str. 18
53842 Troisdorf, Germany
Tel.: +49 2241/2526-0

Trench France S.A.S.
16, Rue du Général Cassagnou
68302 Saint-Louis Cedex, France
Tel.: +33 3 89 70 23 23

Trench High Voltage Products Ltd., Shenyang
No. 2 Jingshenxisan Street,
Daoyi Economic Development Zone,
Shenbei New District,
110136 Shenyang, P.R. China
Tel.: +86 24 8892 3722

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