Grounding Systems for Railways/Traction

Reliable shaft grounding, earthing contacts and CFG systems

Vehicle operating current and high-frequency interference currents can cause irreparable damage to critical components like roller bearings or gearboxes. This, in turn, will result in shortened maintenance intervals and unplanned downtimes for repairs. Our leading technological solutions help solve this issue by reliably dissipating currents via separate current paths. Grounding contacts and shaft grounding systems can be a key part of safe and economical operation for your railway vehicles.

Grounding systems need to work reliably, for as long as possible. Schunk offers long-lasting solutions for all kinds of common installation situations and interfaces. It’s no accident that leading vehicle manufacturers in the railway/traction sector trust grounding systems from Schunk. Our technologies have revolutionized signal current transmission, changing the game when it comes to maintenance intervals.

Inverter-controlled drive systems produce currents with lower amperage, but higher frequency. These vagabond currents can cause devastating damage to railway vehicle drive systems over time. Our Carbon Fiber Grounding System (CFG system) reliably dissipates vagabond shaft currents to the vehicle mass. By doing so, they safely protect roller bearings and adjacent assemblies in engines and transmissions against damage. The unique, interwoven carbon-fiber structure ensures optimal contact and good wear resistance.


Shaft grounding and earthing contacts for continuous use

From all-carbon earthing contacts with optimal emergency running properties for currentless operation to systems for high current densities – from installation on the axle end or on the gearbox – all of our products stand out thanks to outstanding materials expertise, robust design, low wear and extremely long service lives. Our carbon brushes for earthing contacts are also available separately as spare parts.

CFG system prevents damages and reduces maintenance expenses

Vagabond shaft currents in converter-controlled AC motors cause bearing damage in motors and transmissions, produce high levels of noise, and result in greater heat production inside the affected roller bearings. Ultimately, all of these issues result expensive train downtimes. Our patented CFG systems are the right solution. They extend the service life and reliability of your trains by securely dissipating vagabond shaft currents. Our CFG systems can be adapted to the needs of the specific traction motor in the bogie. Thanks to their compact dimensions, they are also easy to retrofit. They also stand out for their resistance to heavy vibration and their ease of installation. We offer our patented solutions for installation on the transmission, engine, or according to customer-specific requirements.