About us

About us

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.

Our locations

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ASIA EUROPE BRAZIL CANADA

TRENCH Limited Canada / Instrument Transformers

71 Maybrook Drive
M1V 4B6 Scarborough, Ontario
Canada

T +1 416 298 8108
F +1 416 298 2209

About the location

Located in Pickering, Ontario, Trench Limited’s Instrument Transformer Division (ITD) is the leading manufacturer of oil insulated instrument transformers for voltage and current measurement. All products are designed to the highest standards of high accuracy revenue metering and protection applications, and also conforms to all ANSI/IEEE, CSA and IEC requirements. The new instrument transformer factory is sprawled over 190,000 sq ft (17,000 sq meter) and includes a manufacturing plant, a 2-storey office and world-class R&D facilities. With a strong market position in North America and global reputation on many world markets, Trench Canada is one of the leading factories worldwide for instrument transformers.

TRENCH Limited Canada / Coil Products

71 Maybrook Drive
M1V 4B6 Scarborough, Ontario
Canada

T +1 416 298 8108
F +1 416 298 2209

About the location

For more than 50 years, Trench has supplied air core reactors to the electric power industry. Founded by Tony Trench in 1962, 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.

Siemens Ltda. Brazil

Avenida Eng. Joao Fernandes
Gimeneses Molina, 1745
13213-080 Jundiaí, Sao Paulo
Brazil

T +1 416 298 8108
F +1 416 298 2209

About the location

Trench Brazil was established in Contagem, Minas Gerais State, Brazil in 1999 and moved to Jundiai, Sao Paulo State, Brazil in 2014. Manufacturing of the first reactors and line traps began in July of 2000. 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 345 kV, 50 KVA to 60 MVA and Line Traps from 72 kV to 800 kV 0,1 to 2 mH.

Trench High Voltage Products Ltd., Shenyang, (THVS)

No. 2 Jingshenxisan Street, Daoyi Economic
Development Zone, Shenbei New District
110136 Shenyang
P. R. China

T +86 24 8892 3722/27
F +86 24 8973 7200

About the location

Trench High Voltage Products Ltd., Shenyang, (THVS) successor of Trench Fushun Bushing Co., Ltd., was established in 2005 and is a member of the global Trench Group. Being a member of Trench Group, THVS benefits from strong technical support and global R&D activities and innovations from group to serve local and oversea customers for various HV applications. The factory is well equipped with advanced manufacturing, assembly, testing equipment and HV test labs. A dedicated team of experienced engineers and skilled workers is working hard to meet customers’ satisfaction. THVS is certified for ISO 9001, ISO 14001 & OHSAS 18001. THVS is not only a market leader for bushings in China and various export markets, but also a successful manufacturer of oil insulated instrument transformers with customer references worldwide. The Instrument Transformers product portfolio includes: • Oil insulated Current Transformers (up to 550 kV) Oil insulated Capacity Voltage Transformer (up to 550 kV) The Bushings product portfolio includes: • Oil Impregnated Paper Bushings (from 40.5 kV – 1100 kV up to 5,000 A) • Epoxy Resin Impregnated Paper Bushings (from 17.5 kV – 800 kV up to 40,000 A)

Siemens Limited India

E-76 Waluj MIDC Area
431133 Aurangabad
India

T +91 (240) 255 4008
F +91 (240) 255 4007

About the location

Siemens Limited, launched manufacturing of High Voltage Instrument transformers in 2008, in the existing HV products factory at Aurangabad in India. The state-of-the-art facility is producing CVTs with Oil insulation and CT/PTs with SF6 insulation and is the only factory in India manufacturing SF6 CT/PTs with Composite insulators with technology support by Trench Germany. The factory also supplies GIS components (Instrument Transformers and Bushings) and Grading Caps to Siemens India. With a total area of 6000 Sq. Meters, Siemens Instrument Transformers is the market leader for CVTs in the domestic market. For SF6 CT/VTs, the facility has its own set up of Composite insulators. There are some key utilities/ industries from Power Generation in India, who have completely switched their CT/PT requirements to SF6 technology. Siemens India is also working continuously together with Global R&D on new generation and digitalized products to serve the customers with advancements further.

TRENCH Germany GmbH

Nürnberger Straße 199
96050 Bamberg
Germany

T +49 951 1803 0
F +49 951 1803 224

About the location

Trench Germany, the former MWB Messwandler-Bau – founded in 1946 – is located in the world-heritage city Bamberg. Based on the long-time experience with the production of high voltage equipment with epoxy-resin and oil-paper insulation, the company pioneered the design and production of gas insulated instrument transformers and developed in 1965 the first GIS SF6 insulated voltage transformer for encapsulated switchgear (GIS). In 2001 Trench Germany completed its 800 kV portfolio in supplying the first 800 kV combined current and voltage instrument transformer for outdoor installation (AIS). Today it is the competence center for gas insulated equipment in the Trench Group and offers plant and office space totaling 45.000 m². With the introduction of SF6 free instrument transformers with Clean Air insulation, Trench Germany once again demonstrates its technological leadership for gas insulated equipment.

HSP Hochspannungsgeräte GmbH

Camp-Spich-Straße 18
53842 Troisdorf
Germany

T +49 2241 2526-0
F+49 2241 2526-116

About the location

HSP Hochspannungsgeräte GmbH – known as HSP – has a long history in manufacturing bushings and high voltage equipment. Over 120 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 1989 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 1200 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.

Siemens EOOD Bulgaria

Place VII, Quarter 23
2161 Pravets
Bulgaria

T +359 (88) 7332 622

About the location

Siemens Bulgaria is the feeder plant of the Trench Group supporting several production locations with components. The modern factory setup and the efficient processes are a key lever for the Trench Group to stay competitive and reduce lead times to even better serve our customers.

TRENCH Austria GmbH

Paschinger Straße 49
4060 Leonding
Austria

T +43 732 6793-0
F +43 732 671341

About the location

In 1954 Trench Austria was established by Alois Esslinger, an electrical engineer known beyond the borders of Austria. The former name of the company until 1990 was Spezielektra Esslinger KG. From the very beginning, one focus area of the company was the development and production of reactors for electrical power system. The use of glass fiber reinforced plastic as part of the insulation of reactors was revolutionary in the 1950s . Trench Austria gained significant international reputation in the 1960s when supplying high current and high voltage test reactors for leadin test laboratories like KEMA in Arnheim/The Netherlands. In 1990 Spezielektra was merged with Trench Electric Toronto/Canada. This was also the starting point for the foundation of the Trench Group. Today Trench Austria in Leonding near Linz produces reactor/coil products for medium and high voltage electrical systems, both in dry type as well as oil immersed technology and is one of the worldwide leading companies in this special area of the electrical industry.

TRENCH Italia S.r.l.

Strada Curagnata, 37
17014 Cairo Montenotte
Italy

T +39 019 5161 111
T +39 019 5161 401

About the location

Trench Italy is located in the village of Cairo Montenotte, in the northwest of Italy near the town of Savona and approximately 80 km from Genoa harbor. The Company was founded in 1919 under the name of Scarpa e Magnano. In 1965 came the merger with Magrini and the whole enterprise was acquired by Merlin Gerin in 1984, before being integrated in the VATECH group in 2001 and finally in the Trench Group in 2006. Since the production start of oil insulated instrument transformers as early as 1919, Trench Italy has a high competence in the design and manufacturing of high voltage instrument transformers. The European production of oil insulated voltage and current transformers, capacitor voltage transformers, grading capacitors and special instrument transformers of the Trench Group is concentrated in Cairo Montenotte on a 63.500 m² total surface. Significant investments in production and testing facilties since 2015 as well as the outstanding technical expertise allowed Trench Italy to introduce state-of the art manufacturing processes that are leading to high quality products and a proven reliability.

TRENCH France S.A.S.

16. Rue du Général Cassagnou
68302 Saint-Louis Cedex
France

T +33 3 89 70 23 23
F +33 3 89 67 26 63

About the location

The company was founded in 1904 in Switzerland by Emil Haefely, an inventor who played a decisive role in the development of the electrotechnical industry at beginning of the 20th century. With the patent of the OIP Condenser type bushing in 1937 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 2017, the Trench Group decided for Trench France to focus specifically on bushings by making extensive manufacturing investments and improving all customer relevant processes.

Europe

TRENCH Germany GmbH

Nürnberger Straße 199
96050 Bamberg
Germany

T +49 951 1803 0
F +49 951 1803 224

HSP Hochspannungsgeräte GmbH

Camp-Spich-Straße 18
53842 Troisdorf
Germany

T +49 2241 2526-0
F+49 2241 2526-116

Siemens EOOD Bulgaria

Place VII, Quarter 23
2161 Pravets
Bulgaria

T +359 (88) 7332 622

TRENCH Austria GmbH

Paschinger Straße 49
4060 Leonding
Austria

T +43 732 6793-0
F +43 732 671341

TRENCH Italia S.r.l.

Strada Curagnata, 37
17014 Cairo Montenotte
Italy

T +39 019 5161 111
T +39 019 5161 401

TRENCH France S.A.S.

16. Rue du Général Cassagnou
68302 Saint-Louis Cedex
France

T +33 3 89 70 23 23
F +33 3 89 67 26 63

North America

TRENCH Limited Canada / Instrument Transformers

71 Maybrook Drive
M1V 4B6 Scarborough, Ontario
Canada

T +1 416 298 8108
F +1 416 298 2209

TRENCH Limited Canada / Coil Products

71 Maybrook Drive
M1V 4B6 Scarborough, Ontario
Canada

T +1 416 298 8108
F +1 416 298 2209

South America

Siemens Ltda. Brazil

Avenida Eng. Joao Fernandes
Gimeneses Molina, 1745
13213-080 Jundiaí, Sao Paulo
Brazil

T +1 416 298 8108
F +1 416 298 2209

Asia

Trench High Voltage Products Ltd., Shenyang, (THVS)

No. 2 Jingshenxisan Street, Daoyi Economic
Development Zone, Shenbei New District
110136 Shenyang
P. R. China

T +86 24 8892 3722/27
F +86 24 8973 7200

Siemens Limited India

E-76 Waluj MIDC Area
431133 Aurangabad
India

T +91 (240) 255 4008
F +91 (240) 255 4007

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