The company was founded in in Switzerland by Emil Haefely, an inventor who played a decisive role in the development of the electrotechnical industry at beginning of the th century. With the patent of the OIP Condenser type bushing in by Emil Haefely, the company became a pioneer in Oil type bushings. Trench France is part of the Trench & HSP Bushing group belonging to Siemens with locations in France (Trench France), Germany (HSP) and China (THVS). This close cooperation for innovation and design is supported by Siemens process and manufacturing know how. In , the Trench Group decided for Trench France to focus specifically on bushings by making extensive manufacturing investments and improving all customer relevant processes.
For more than years, Trench has supplied air core reactors to the electric power industry. Founded by Tony Trench in , Trench Canada has demonstrated versatility, confirmed capability and compliance with the most stringent quality standards to ensure that Trench maintains a worldwide leader for coil products. Located in Scarborough, Ontario, Trench has proven the effectiveness of vertically integrated operations in the manufacturing of air core reactors. Significant investments in the factory layout and process optimization over recent years makes Trench Canada a reliable partner for customers.
Trench Brazil was established in Contagem, Minas Gerais State, Brazil in and moved to Jundiai, Sao Paulo State, Brazil in . Manufacturing of the first reactors and line traps began in July of . Trench Brasil was established by the Trench Group to better serve our customer needs in South America and to improve the position in the global market. The technology and manufacturing techniques used by the company in Brazil are all from Trench Limited Canada who transferred its reactor and line trap technology to Trench Brasil during the plant construction phase. Today Siemens Brazil manufactures Air Core Reactors from up to kV, KVA to MVA and Line Traps from kV to kV , to mH.
HSP Hochspannungsgeräte GmbH – known as HSP – has a long history in manufacturing bushings and high voltage equipment. Over years ago it was founded as a division of Meirowsky & Co., was then taken over by Dielektra AG and later by Felten & Guilleaume Energietechnik AG (F&G). Since HSP is an independent company. We develop and manufacture condenser graded high voltage bushings in RIP technology (resin impregnated paper) and RIS technology (resin impregnated synthetic) up to kV rated voltage for AC applications and HVDC transmissions. Our bushings are suitable for power transformers, switchgears, generators, HVDC and for test equipment – meeting all international standards. By consistently maintaining the highest quality standards, we have become a leader on the world market for high-voltage bushings in recent decades.