Catalog

8 Result(s)

  • Earthing contacts for Metro and Tram
  • 1 Gaine Standard Radial 10X25 (65Amp)

    The flow of electric current through the axle box roller bearing of railway vehicles is one major problems for the safety and reliability of rolling stock. The electrification of networks, the increase of power installed on board vehicles and higher speeds lead to an increase of risks of bearings damaged by electric current flow. As a result, the use of Earth Return Current Units, already indispensable on electric locomotives, is being extended to other vehicles by the large European railway companies. Since 50 years, Mersen devices by virtue of their effectiveness (low contact resistance, permanence of contact), are very well suited for the protection of such bearings. On all the vehicles of a train, the currents that can flow through the axle box roller bearing have various origins and their magnitude varies from the first to the last vehicles. The origins are: - The electric locomotive or power car: Traction current in the return current path and current supplied in the return path from trailer vehicles. This latter origin also applies to diesel electric traction. - The trailer vehicles equipped with generators supplying power to several trailers of a train where the return path is formed by earthing of the vehicles. - The track: return current of trains running on the same track; signalling currents; stray currents emanating from industrial trackside installations. In the 3 cases above, train and track are parallel conductors. - Accidental: faulty insulation on one or more pieces of electrical equipment on board any of the vehicles; overhead line falling onto the train. The flow of current through roller bearings while the vehicles are stationary or running, produces damages characterized by craters or scoring (washboarding) respectively and whose development is dangerous. This result in substantial overheating leading to the destruction of the roller bearing or seizure of the axles. To avoid such damages, it is necessary to use devices shunting the greatest part of the current through the axles and wheels without flowing through the roller bearings. Some references : Metro Toronto (CA) NYCTA 142 (US) Singapore Tramway : Genoa, Torino (IT) Nantes, Grenable, Bobigny, Rouen (FR) The Hague (NL) Read more

  • 2 Gaines Standard Radial 20X25 (250Amp)

    The flow of electric current through the axle box roller bearing of railway vehicles is one major problems for the safety and reliability of rolling stock. The electrification of networks, the increase of power installed on board vehicles and higher speeds lead to an increase of risks of bearings damaged by electric current flow. As a result, the use of Earth Return Current Units, already indispensable on electric locomotives, is being extended to other vehicles by the large European railway companies. Since 50 years, Mersen devices by virtue of their effectiveness (low contact resistance, permanence of contact), are very well suited for the protection of such bearings. On all the vehicles of a train, the currents that can flow through the axle box roller bearing have various origins and their magnitude varies from the first to the last vehicles. The origins are: - The electric locomotive or power car: Traction current in the return current path and current supplied in the return path from trailer vehicles. This latter origin also applies to diesel electric traction. - The trailer vehicles equipped with generators supplying power to several trailers of a train where the return path is formed by earthing of the vehicles. - The track: return current of trains running on the same track; signalling currents; stray currents emanating from industrial trackside installations. In the 3 cases above, train and track are parallel conductors. - Accidental: faulty insulation on one or more pieces of electrical equipment on board any of the vehicles; overhead line falling onto the train. The flow of current through roller bearings while the vehicles are stationary or running, produces damages characterized by craters or scoring (washboarding) respectively and whose development is dangerous. This result in substantial overheating leading to the destruction of the roller bearing or seizure of the axles. To avoid such damages, it is necessary to use devices shunting the greatest part of the current through the axles and wheels without flowing through the roller bearings. Some references : Metro Toronto (CA) NYCTA 142 (US) Singapore (SG) Tramway : Genoa, Torino (IT) Nantes, Grenoble, Bobigny, Rouen (FR) The Hague (NL) Read more

  • 2 Gaines Standard Radial 20X40 (400Amp)

    The flow of electric current through the axle box roller bearing of railway vehicles is one major problems for the safety and reliability of rolling stock. The electrification of networks, the increase of power installed on board vehicles and higher speeds lead to an increase of risks of bearings damaged by electric current flow. As a result, the use of Earth Return Current Units, already indispensable on electric locomotives, is being extended to other vehicles by the large European railway companies. Since 50 years, Mersen devices by virtue of their effectiveness (low contact resistance, permanence of contact), are very well suited for the protection of such bearings. On all the vehicles of a train, the currents that can flow through the axle box roller bearing have various origins and their magnitude varies from the first to the last vehicles. The origins are: - The electric locomotive or power car: Traction current in the return current path and current supplied in the return path from trailer vehicles. This latter origin also applies to diesel electric traction. - The trailer vehicles equipped with generators supplying power to several trailers of a train where the return path is formed by earthing of the vehicles. - The track: return current of trains running on the same track; signalling currents; stray currents emanating from industrial trackside installations. In the 3 cases above, train and track are parallel conductors. - Accidental: faulty insulation on one or more pieces of electrical equipment on board any of the vehicles; overhead line falling onto the train. The flow of current through roller bearings while the vehicles are stationary or running, produces damages characterized by craters or scoring (washboarding) respectively and whose development is dangerous. This result in substantial overheating leading to the destruction of the roller bearing or seizure of the axles. To avoid such damages, it is necessary to use devices shunting the greatest part of the current through the axles and wheels without flowing through the roller bearings. Some references : Railway : Juniper, Virgin (GB) Read more

  • 2 Gaines Standard Radial 25X50 (625Amp)

    The flow of electric current through the axle box roller bearing of railway vehicles is one major problems for the safety and reliability of rolling stock. The electrification of networks, the increase of power installed on board vehicles and higher speeds lead to an increase of risks of bearings damaged by electric current flow. As a result, the use of Earth Return Current Units, already indispensable on electric locomotives, is being extended to other vehicles by the large European railway companies. Since 50 years, Mersen devices by virtue of their effectiveness (low contact resistance, permanence of contact), are very well suited for the protection of such bearings. On all the vehicles of a train, the currents that can flow through the axle box roller bearing have various origins and their magnitude varies from the first to the last vehicles. The origins are: - The electric locomotive or power car: Traction current in the return current path and current supplied in the return path from trailer vehicles. This latter origin also applies to diesel electric traction. - The trailer vehicles equipped with generators supplying power to several trailers of a train where the return path is formed by earthing of the vehicles. - The track: return current of trains running on the same track; signalling currents; stray currents emanating from industrial trackside installations. In the 3 cases above, train and track are parallel conductors. - Accidental: faulty insulation on one or more pieces of electrical equipment on board any of the vehicles; overhead line falling onto the train. The flow of current through roller bearings while the vehicles are stationary or running, produces damages characterized by craters or scoring (washboarding) respectively and whose development is dangerous. This result in substantial overheating leading to the destruction of the roller bearing or seizure of the axles. To avoid such damages, it is necessary to use devices shunting the greatest part of the current through the axles and wheels without flowing through the roller bearings. Some references : Railway : Juniper, Virgin (GB) Read more

  • 3 Gaines Standard Axial 12,5X32 (300Amp)

    In the patented Earth Return Current Unit the contact is made to the axle end by means of 2 independent brushes guided in 2 boxes of rectangular section in the radial direction of the axle. Two independent pressure systems of the close coiled roller spring type without inertia, apply a constant pressure to each of the 2 brushes. The Earth Return Current unit is fitted to the axle by means of an adaptation part which replaces the axle box end cover, and is therefore easily accessible. For the inspection purposes, it is a simple matter of undoing 3 screws removing the cover/spring assembly for access to the brushes. An insulating support positioned between the Earth Return Current Unit and part ensures the effective shunting of the roller bearing by the unit. The connection lug for the electrical connection is an integral part of the unit. The rotating contact face is a disc fitted to the axle end and possibly protected against lubricants emanating from the axle box bearing by a guard. Due to the simplicity of the device and the very slow rate of brush wear (about 1 to 3mm per 100’000 km or 190’000 miles after patina creation), maintenance required is virtually zero. With the appropriate brush grade the formation of the skin on the surface of the contact disc can be observed and no evidence of hammering nor bevelling appears on the brush contact faces. The brushes are generally a metal graphite mixture grade manufactured by Mersen. Some references : Metro : Los Angeles LACMTA (US) SMRT (Singapore) Cairo (EG) Tramway : Toronto, Portland, St Jose, Bonn, Rotterdam, Los Angeles, Melbourne Read more

  • 3 Gaines Standard Axial 20X40 (600Amp)

    The flow of electric current through the axle box roller bearing of railway vehicles is one major problems for the safety and reliability of rolling stock. The electrification of networks, the increase of power installed on board vehicles and higher speeds lead to an increase of risks of bearings damaged by electric current flow. As a result, the use of Earth Return Current Units, already indispensable on electric locomotives, is being extended to other vehicles by the large European railway companies. Since 50 years, Mersen devices by virtue of their effectiveness (low contact resistance, permanence of contact), are very well suited for the protection of such bearings. On all the vehicles of a train, the currents that can flow through the axle box roller bearing have various origins and their magnitude varies from the first to the last vehicles. The origins are: - The electric locomotive or power car: Traction current in the return current path and current supplied in the return path from trailer vehicles. This latter origin also applies to diesel electric traction. - The trailer vehicles equipped with generators supplying power to several trailers of a train where the return path is formed by earthing of the vehicles. - The track: return current of trains running on the same track; signalling currents; stray currents emanating from industrial trackside installations. In the 3 cases above, train and track are parallel conductors. - Accidental: faulty insulation on one or more pieces of electrical equipment on board any of the vehicles; overhead line falling onto the train. The flow of current through roller bearings while the vehicles are stationary or running, produces damages characterized by craters or scoring (washboarding) respectively and whose development is dangerous. This result in substantial overheating leading to the destruction of the roller bearing or seizure of the axles. To avoid such damages, it is necessary to use devices shunting the greatest part of the current through the axles and wheels without flowing through the roller bearings. Some references : Railway : RATP Paris Cairo Madrid Rome Caracas Lyon Seoul Singapore Read more

  • 2 Gaines into isolated wheel Axial 16X25 (200Amp)

    The flow of electric current through the axle box roller bearing of railway vehicles is one major problems for the safety and reliability of rolling stock. The electrification of networks, the increase of power installed on board vehicules and higher speeds lead to an increase of risks of bearings damaged by electric current flow. As a result, the use of Earth Return Current Units, already indispensable on electric locomotives, is being extended to other vehicules by the large European railway companies. Since 50 years, Mersen devices by virtue of their effectiveness (low contact resistance, permanence of contact), are very well suited for the protection of such bearings. On all the vehicles of a train, the currents that can flow through the axle box roller bearing have various origins and their magnitude varies from the first to the last vehicles. The origins are : - The electric locomotive or power car : Traction current in the return current path and current supplied in the return path from trailer vehicles. This latter origin also applies to diesel electric traction. - The trailer vehicules equipped with generators supplying power to several trailors of a train where the return path is formed by earthing of the vehicules. - The track : return current of trains running on the same track; signalling currents; stray currents emanating from industrial trackside installations. In the 3 cases above, train and track are parallel conductors. - Accidental : faulty insulation on one or more pieces of electrical equipment on board any of the vehicles; overhead line falling onto the train. The flow of current through roller bearings wilst the vehicles are stationary or running, produces damages characterized by craters or scoring (washboarding) respectively and whose development is dangerous. This result in substantial oversheatings leading to the destruction of the roller bearing or seizure of the axles. To avoid such damages, it is necessary to use devices shunting the greatest part of the current through the axles and wheels without flowing through the roller bearings. Some references : Tramway : Düsseldorf, Melbourne, Budapest, ... Read more

  • 4 Gaines into the wheel Radial 12,5X25 (300Amp)

    The flow of electric current through the axle box roller bearing of railway vehicles is one major problems for the safety and reliability of rolling stock. The electrification of networks, the increase of power installed on board vehicles and higher speeds lead to an increase of risks of bearings damaged by electric current flow. As a result, the use of Earth Return Current Units, already indispensable on electric locomotives, is being extended to other vehicles by the large European railway companies. Since 50 years, Mersen devices by virtue of their effectiveness (low contact resistance, permanence of contact), are very well suited for the protection of such bearings. On all the vehicles of a train, the currents that can flow through the axle box roller bearing have various origins and their magnitude varies from the first to the last vehicles. The origins are: - The electric locomotive or power car: Traction current in the return current path and current supplied in the return path from trailer vehicles. This latter origin also applies to diesel electric traction. - The trailer vehicles equipped with generators supplying power to several trailers of a train where the return path is formed by earthing of the vehicles. - The track: return current of trains running on the same track; signalling currents; stray currents emanating from industrial trackside installations. In the 3 cases above, train and track are parallel conductors. - Accidental: faulty insulation on one or more pieces of electrical equipment on board any of the vehicles; overhead line falling onto the train. The flow of current through roller bearings while the vehicles are stationary or running, produces damages characterized by craters or scoring (washboarding) respectively and whose development is dangerous. This result in substantial overheating leading to the destruction of the roller bearing or seizure of the axles. To avoid such damages, it is necessary to use devices shunting the greatest part of the current through the axles and wheels without flowing through the roller bearings. Some references : Railway : Alstom Citadis Bordeaux, Lyon, Montpellier, Nice, Strasbourg, etc... Read more

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