Mersen – Conventional Energy – Electrical Equipment Safety and Reliability

Mersen is the world leader for carbon brushes, brush-holders and slip ring assemblies.
Mersen works with electrical utilities and the critical original equipment manufacturers (OEMs) that support them around the world.
Mersen designs and manufactures high-technology innovative solutions to address its clients’ specific needs (such as reliability or long service life).
We provide our customers with technological solutions to optimise the performance of their equipment, making them more competitive and contributing to safe and continuous power generation.
Carbon brushes, brush-holders and slip ring assemblies
Mersen offers complete technical solutions for all motor and generator applications, including carbon brushes (graphite brushes), brush-holders, slip-ring assemblies, power and signal transfer systems and antistatic brushes.
Mersen’s LFC554 carbon grade (for turbo generators) is currently regarded as the benchmark around the world. Our LFC554 carbon brushes withstand very high speeds.
Our multiple solutions make us a leading supplier to the energy segment, in both the original equipment and replacement markets. We also offer customised reengineered solutions to retrofit our customers’ equipment, in order to increase their performance, as well as reduce maintenance and downtime.
Our range of high-quality engineered solutions
Whatever your electricity source (fuel oil, coal, nuclear, cogeneration), our knowledge of the market has enabled us to develop adapted solutions for current transmission, power and data transmission and related areas of expertise:
DC motor brushes
Power carbon brushes
Grounding carbon brushes
Brush-holders and brush rocker brackets
Plug set brush-holders guarantee full safety when replacing carbon brushes under load
Carbon dust collection systems remove all carbon dust at its source to refrain dust dispersion all over the machine. They are supplied within complete packages including the dust collection system, assembly of the system and generator maintenance
Slip ring assemblies
Signal transfer systems
Power transfer systems
Brush gear and brush gear systems (complete collector assemblies including ventilation box, ensuring optimum enclosure protection, together with easy access and safe maintenance)
Carbon seals (Papyex® gaskets, segmented seals)
Circuit protection (fuse and fusegear, power distribution blocks and surge protection devices)
Low voltage and high power switches
Cooling of power electronics (cold plates, air cooled heatsinks)
Power interconnection
Retrofit capabilities, leading to improved parts with better designs, functionalities and construction
Motor and maintenance services (in-situ commutator and slip ring machining, motor inspection and technical support)
Full range of maintenance tools
Specifically designed measuring devices
Testing facilities for power and signal transfer
Our testing facilities for power and signal transfer (environmental chamber, slip ring test bench, turbo generator test bench) are equipped with state-of-the-art equipment to perform tests according to industry standards and bespoke customer requests.
Mersen has an outstanding capability attracting product development from international OEMs in the energy sector:
Generation of characteristic curves in controlled atmospheres
High speed performance simulation
Test with controlled temperature
6m³ environmental chamber
Thermal fatigue test
Multiple signal protocol injection
An expert in electrical equipment, safety and reliability
Mersen (formerly known as Carbone Lorraine) is a global expert in electrical equipment safety and reliability. We have developed an industrial and commercial network enabling us to build close relationships with leading industrial groups right around the world. Our 7,000 employees put their skills and passion to serve you in 60 manufacturing facilities distributed over 40 countries.
Our solutions are based on 120 years of experience gained in the field. Working in different countries, applications and environments, we know what works and how to improve performance.

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