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HSP Hochspannungsgeräte GmbH, Troisdorf and Trench are subsidiaries of Siemens AG.
HSP is a leading company in the production of bushings. The Trench Group is a worldwide leading manufacturer of high voltage products such as instrument transformers, bushings and reactors.
This includes a wide range of bushings products for Power Transformers, Gas Insulated Substations, Breakers, Generators, Buildings, Test Equipment, Rail Road Systems, HVDC and other specialty applications.