The Trench and HSP Group is a world leader in power engineering and the design of specialized high voltage electrical products serving customers in the utility and industrial markets around the globe.
Our product portfolio includes Bushings, Instrument Transformers, and Coil Products.Trench products are installed in every corner of the world and have proven their reliability over decades.
Trench and the companies forming the Trench Group have always been front runners in all three fields of the business. With the patent on Oil impregnated paper condenser type bushings in 1937, Emil Haefele laid the foundation for the Trench Bushing business. In Instrument transformers the Trench Group is a technology leader since 100 years, when in Italy the first paper oil Instrument transformers were produced. And Tony Trench, the founder of the Trench Group was a real pioneer developing Air core reactors in the early 1960s.
In 2004 Siemens acquired Trench. The Trench and HSP Group with around 3.000 employees and 10 factories is today part of the Siemens Transmission Products business.
