Surge arresters for railway applications Product guide HP-AR 41 2017

Siemens surge arresters for railway applications – reliable, stable and safe overvoltage protection electrification. The comprehensive portfolio makes it possible to find the ideal surge arrester for any conceivable application and meet even specific demands, such as: • high mechanical stability to withstand vibrations and high wind speeds • extremely reliable pressure relief behavior when special protection is required • excellent pollution layer characteristics for coastal and desert regions and areas with extreme air pollution Standards and testing – reliability you can count on Siemens surge...

Product range Siemens offers different surge arrester types for AC and DC applications. 3EB4 surge arrester for rail applications • Housing made of fiber-glass reinforced plastic (FRP) hollow core and silicone rubber sheds For use on: • High-speed trains and intercity trains • Commuter and regional trains • Urban transportation (light rail, metros and tram cars) • Short circuit current capability up to 50 kA • Rail electrification 3EB5 surge arrester for rail applications • Cage Design™ with directly molded silicone rubber housing • Commuter and regional trains • Urban transportation (light rail,...

3EB4 Silicone rubber surge arrester with composite hollow core design FRP tube End fitting with directional pressure relief device and sealing system Directional pressure relief device Metal oxide resistors Silicone rubber sheds directly molded on FRP tube Arcing horn Reliable and safe: 3EB4 railway surge arresters 3EB4 railway surge arresters were designed to ensure outstanding safety and durability. They are hydrophobic and also withstand exposure to weather extremes, temperatures from –40 °C to +70 °C, and the effects of UV radiation. Resilient technology and durable materials ensure smooth...

3EB5 Surge arresters with silicone rubber housing and Cage Design™ Silicone rubber sheds directly molded on metal oxide resistors and on end-fittings Metal oxide resistors The innovative Cage Design™ 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-glass 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...

Recommendation for applications in DC systems according to VDV 525* • Rails of DC railway systems that are isolated from earth require low-resistance tower footings, driven piles, the reinforcements of concrete tracks, or separate earth rods for earth termination. • Rails without any additional isolation generally have a low leakage resistance and can be used as earth terminations. Surge currents will simply be discharged through the rails. However, this endangers electrical and electronic equipment near or on the tracks. Additional surge arresters within such equipment provide an effective remedy...

Lightning protection of supply and return lines at substations requires: • "A1" type surge arresters connected between section circuit breakers/cable terminals and the return line. • "A2" type surge arresters between return line and structure earth to limit the unavoidable potential rise in a return line caused by a lightning surge current. Even though MOV surge arresters have failure rates well below 0.1 percent per year, a failure may occur and lead to permanent conductivity of the "A1" type surge arresters, resulting in inadmissibly high fault voltage on the ground electrode for a long time....

Packing dimensions Replacement of phased-out surge arresters An overview of replacement types of phased-out surge arresters for rail systems is shown in the table below. Replacement type

Related catalogues and brochures Surge arresters Medium-voltage surge arresters Article No. EMHP-C10018-00-7600 High-voltage surge arresters Article No. E50001-G630-A249-X-4A00 Silicone rubber insulation for surge arresters Railway Electrical components for the railway industry

Published by and copyright © 2017: Siemens AG Energy Management High Voltage Products Freyeslebenstrasse 1 91058 Erlangen, Germany Siemens AG Energy Management High Voltage Products Nonnendammallee 104 13629 Berlin, Germany For more information, please contact us at Phone: +49 30 386 33 222 Fax: +49 30 386 26 721 E-mail: [email protected] siemens.com/arresters Article No. EMHP-B10024-00-7600 Dispo 30002 fb 7737 WS 08171.0 Printed in Germany All rights reserved. Trademarks mentioned in this document are the property of Siemens AG, its affiliates, or their respective owners. Subject to...