The Trench 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 instrument transformers, bushings and coil products.

We offer a broad product range and solutions covering various applications and voltage levels in order to meet our customer’s expectations.

Trench products are installed in every corner of the world and have proven their reliability over decades.

Our product portfolio

Trench and the companies forming the Trench Group have always been pioneers in all three fields of the business setting the standards of the industry.

The portfolio of instrument transformers, bushings and coil products is one of the broadest and most proven in the market. It is based on the experience of decades but constantly improved to meet new requirements. The intense R&D activities enable Trench to introduce new products in the market such as Clean Air instrument transformers, dry type bushings or air core HV shunt reactors.

Instrument Transformers

The Trench Group has a full portfolio of instrument transformers that is capable to meet any customer’s needs worldwide and can be installed in any environmental condition. It includes current transformers, voltage transformers and combis in oil, gas and Clean Air insulation as well as special instrument transformers e.g. for HVDC.


Trench bushings for transformers, generators, switchgears or special applications are available in a wide variety of internal insulation technologies including Oil Impregnated Paper (OIP) and Resin Impregnated Paper (RIP). The huge variety of products and the high end customer acceptance makes Trench the partner of choice for all OEMs.

Coil Products

With over 50 years of field experience, Trench is the leader in the design and manufacture of air-core, dry-type, power reactors for all utility and industrial applications such as current limiting reactors or HVDC reactors. A unique custom design approach and the global production network are the basis for a high customer satisfaction.