Purchase your copy of IEC as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available online in. Find the most up-to-date version of IEC at Engineering IEC Edition INTERNATIONAL. STANDARD. NORME. INTERNATIONALE. Railway applications – Fixed installations.
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Standard oil-insulated or industry-proven cast-resin transformers are used that also fulfill special requirements for fire protection and safety. 61228-1 effective service concepts and innovative technologies Siemens Rail Services ensures the highest reliability and availability of your rail systems. The principles of negative grounding device operation and corresponding voltage settings will also be discussed.
Reduce your voltage with transformers and use rectifiers to convert AC to DC current. Protective provisions against electric shock This document has been re-assessed by the committee, and judged to still be up to date.
IEC 62128-1 Ed. 2.0 b(2013)
Since the shells of rail vehicles are typically at the same voltage as the wheels and rails, this voltage difference could be impressed on a passenger entering or exiting a train from a grounded platform. Proven protection for contact lines: Equipment intended to detect this condition and connect the substation negative dc bus to the substation grounding grid is gradually being incorporated into modern North American dc traction power substation design.
These withdrawable diode rectifiers are designed to supply traction power to DC-operated rail systems. Sitras LCU local charging unit Download brochure. This paper will review current American and European standards and codes for maximum permissible rail voltage on direct current traction power systems. As a DC protection unit, it protects DC switchgear and contact line systems from critical operating conditions and detects short circuits during a current rise — even before maximum short-circuit currents are reached.
Recharging occurs during dwell time by an overhead conductor rail. Sitras SCD-C compact short-circuiting device for DC traction power supply In DC traction systems, impermissible contact voltage can occur between the return circuit and the structure ground due to operational currents and short-circuit currents. Distribute energy feeds efficiently and connect them reliably with the rectifier group, regardless of whether you select a gas- or air-insulated indoor installation. Intermodal Solutions Intermodal Solutions comprise a range of innovative IT-based solutions that improve passenger comfort and travel.
Sitras MDC modular digital controller Download brochure. A Review of Current Standards and Codes for Maximum Permissible Rail Voltage Rise on Direct Current Traction Power Systems The negative return portion of a modern direct current dc traction power system, which includes the tracks the running railsis normally isolated from earth to the maximum extent practical.
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Sitras PRO combined protection unit and controller Download brochure. Follow these links to find other Ice similar to the one you are viewing. Designed especially for highly dynamic rectifier loading, our rectifier transformers have power ratings that iex from approximately one MVA for stations supplying trolley cars and trams to approximately seven MVA for operating heavy subways.
Although we endeavour to maintain an up-to-date catalogue, on occasion we may not have the latest version of a document, including where it has not yet been provided through an international feed. It protects DC switchgear and contact line systems from critical operating conditions and detects short-circuits during a current rise — even before maximum short-circuit currents are reached.
For our DC substations, we use the same proven standard medium-voltage switchgear used by utilities and industrial plants. The purpose of this isolation is to prevent stray dc currents from flowing through the earth and potentially causing corrosion of nearby metallic infrastructure. Traction power Geographic Terms: The formation of stray currents is also minimized by automatically opening the short-circuiting device.
Figures; References; Tables; Pagination: Medium-voltage switchgear for the DC traction supply system For our DC substations, we use the same proven standard medium-voltage switchgear used by utilities and industrial plants. Protection Always on the safe side Proven protection for contact lines, future-proof and easy to operate: EN includes voltage-time curves that dictate the maximum permissible magnitudes and durations for 6228-1 and dc voltages; equipment built to EN must clamp the highest voltages in no more than 20 milliseconds.
Intermodal Solutions comprise a range of innovative IT-based solutions that improve passenger comfort and travel. Rolling Stock Cost-effective operation reducing environmental impact, conserving resources — with reliable Rolling Stock.
For the best experience we suggest that you download the newest version of a supported browser:. Without a low-resistance path back to the substation, there may be a resulting low-level short circuit current flow insufficient to operate the substation protective systems. We recommend that you check the website of 62218-1 publishers of the international document before making a purchase. Modular portfolio Ief traction power 62128–1 — high-performance, efficient, and safe Reduce costs and save resources using efficient, resilient traction power supply systems.
Sitras SCD short-circuiting device for DC traction power supply In DC traction systems, impermissible jec voltage can occur between the return circuit and the structure ground due to operational currents and short-circuit currents. Sitras SCD reduces excessively high voltage by reliably ied the return circuit and structure ground temporarily. The negative return portion of a modern iex current dc traction power system, which includes the tracks the running railsis normally isolated from earth to the maximum extent practical.
Rectifier group Achieve maximum cost-effectiveness A secure power supply for your contact lines: