Siemens offers different surge arrester types for AC and DC applications

3EB2 Surge arrester with silicone rubber housing

• Housing made of silicone rubber
• For DC systems up to 3 kV
• Travel speed up to 160 km/h
• Short circuit current capability 40 kA
• Classification DC-B

For use on:

• Urban transportation (light rail, metros and tram cars)
• Rail electrification

3EB3 Surge arrester with silicone rubber housing

• Housing made of silicone rubber
• For DC systems up to 3 kV
• Travel speed up to 160 km/h
• Short circuit current capability 40 kA
• Classification DC-C

For use on:

• Urban transportation (light rail, metros and tram cars)
• Rail electrification

3EB4 Silicone rubber surge arrester with composite hollow core design

Siemens’ reliable and innovative composite hollow core design uses silicone which is directly molded onto a fiberglass reinforced plastic (FRP) tube. This ensures an enormous withstand capability against mechanical forces. An excellent special sealing of the flanges at both ends of the surge arrester prevents partial discharges and moisture ingress and ensures decades of trouble-free service. In the case of an overload or the extremely rare case of an arrester short circuit, the arc escapes directly through a directional pressure relief device. This makes it possible to point the surge arrester in a direction that will minimize the risk of any damage to the equipment and passengers nearby. Internal parts are not ejected and the shatterproof housing does not break.

• Housing made of glass fiber reinforced plastic (FRP) hollow core and silicone rubber sheds
• For AC systems up to 25 kV
• For DC systems up to 3 kV
• Travel speed up to 420 km/h
• Short circuit current capability up to 50 kA

For use on:

• High-speed trains and intercity trains
• Commuter and regional trains
• Locomotives
• Urban transportation (light rail, metros and tram cars)
• Rail electrification

3EB5 Surge arrester with silicone rubber housing and Cage Design

The innovative Cage Designв„ў of Siemens 3EB5 rail surge arresters ensures high mechanical strength, safe overload performance, and maintenance-free, reliable service: The metal oxide resistors (MOVs) are enclosed by a cage made of fiber-reinforced plastic (FRP) rods. This rigid, reinforced structure ensures high mechanical strength. The self-extinguishing and flame retardant silicone rubber housing is directly molded onto the MOVs and the FRP rods for excellent sealing. All components are completely embedded, inclusions and gaps are avoided, partial discharges and moisture are prevented. The hydrophobic Silicone rubber is permanently water-repellent and stain-resistant, which results in high tracking and erosion resistance. Since the MOVs are not enclosed in a sealed mechanical shell, the arc can escape directly through the soft silicone housing in the extremely rare event of the MOVs being overloaded. Arcing cannot lead to critical internal pressure, the mechanical support structure of the enclosure remains unharmed, the ejection of internal parts that could damage other equipment nearby is prevented almost completely.

• Cage designв„ў with directly molded silicone rubber housing
• For AC systems up to 25 kV
• For DC systems up to 3 kV
• Travel speed up to 320 km/h
• Short circuit current capability up to 65 kA

For use on:

• Intercity trains
• Commuter and regional trains
• Locomotives
• Urban transportation (light rail, metros and tram cars)
• Rail electrification