In September 1997, CVC Funds acquired Trench from BBA Group. Trench is a world leader in the design, manufacture and distribution of high-voltage technology products used in the power transmission and distribution industries.

Established over 45 years ago, Trench has designed and developed high quality engineered products, including air core reactors, instrument transformers, earth fault protection devices, bushing, line traps, relay communication and protection and control equipment.

Trench today employs more than 1,800 members of staff, maintaining a diverse market presence thanks to its worldwide sales network and several hundred highly qualified engineers and technicians who deliver fast and reliable technical support and expertise. The company has operates 12 production sites: four in North America, five, in Europe, two in Asia and one in South America.

In April 2004, Trench was sold to Siemens, now a part of the Siemens Power Transmission and Distribution group.

Year of investment



High voltage components