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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The formation of stray currents is also minimized by automatically opening the short-circuiting device. Follow these links to find other Standards similar to the one you are viewing. The lack of an intentional connection between the tracks and earth allows voltage differences to occur along the rails, and between the rails and nearby structures. Rectifier transformers for the DC traction supply system Designed especially for highly dynamic rectifier loading, our rectifier transformers have power ratings that range from approximately one MVA for stations supplying trolley cars and trams to approximately seven MVA for operating heavy subways.
DC traction power supply – Rail Electrification – Global
Ie our experts Talk to us. EN includes voltage-time curves that dictate the maximum permissible magnitudes and durations for ac and dc voltages; equipment built to EN must clamp the highest voltages in no more than 20 milliseconds.
Rail Automation Optimum, systematic route efficiency. The principles of negative grounding device operation and corresponding voltage settings will also be discussed. Intermodal Solutions comprise a range of innovative IT-based solutions that improve passenger comfort and travel.
Traction power Geographic Terms: Nov 9 3: Rail Services Rail systems must do one thing above all: It looks like you are using a browser that is not fully supported.
If you need help with the purchase or have any queries please email enquiries standards. Reduce your voltage with transformers and use rectifiers to convert AC to DC current. For modern dc traction power systems in particular, however, this resistance is high enough for the rails to be considered essentially ungrounded with respect to local electrical ground earth. Proven protection for contact lines: We provide all the services you need from a single oec, giving you unique ifc to save.
Modular portfolio DC traction power supply — high-performance, efficient, and safe Reduce costs and 6212-81 resources using efficient, resilient traction power supply systems. For the best experience we suggest that you download the newest version of a supported browser:. As a result, the area in the vicinity of the fault may potentially be elevated to unsafe voltage levels.
Benefit from our decades of experience in the engineering, construction, and commissioning of DC traction power supply systems. American 621281- of Mechanical Engineers. 621288-1 they could be impressed on a person walking along the tracks. Ice intended to detect this condition and connect the substation negative dc bus to the substation grounding grid is gradually being incorporated into modern 62128–1 American dc traction power substation design.
Contact Experience high performance — with the DC traction power supply Benefit from our decades of experience in the engineering, construction, and commissioning of DC traction power supply systems. It is important to us that you purchase the right document.
Sitras SCD reduces excessively high voltage by reliably short-circuiting the return circuit and structure ground temporarily. Protection Always on the safe side Proven protection for contact lines, future-proof and easy to operate: The purpose of this isolation is to prevent stray dc currents from flowing through the earth and potentially causing corrosion of nearby metallic infrastructure.
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.
The main technical changes with regard to the previous edition are the restructuring of all clauses and changes in the touch voltages limits. Designed especially for highly dynamic rectifier loading, our rectifier transformers have power ratings that range from approximately one MVA for stations supplying trolley cars and trams to approximately seven MVA for operating heavy subways.
Sitras LCU can be placed at stations or stops or can be integrated into traction substations. Each track tie and insulated rail fastener assembly can be electrically represented as a resistor of high ohmic value connected between the rails and the earth. Protective provisions against electric shock This document has been re-assessed by the committee, and judged to still be up to date. These withdrawable diode rectifiers are designed to supply traction power to DC-operated rail systems.
Sitras REC diode rectifiers Download brochure. 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. Europe ; United States Subject Areas: International Classification for Standards ICS is an international classification system for technical standards.
Medium-voltage switchgear Reliable operation Distribute energy feeds efficiently and connect them reliably with the rectifier group, regardless of whether you select a gas or air-insulated indoor installation. Experience high performance An age of extreme urbanization calls for innovative and flexible mobility concepts.
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.
DC traction power supply system
Sitras SCD short-circuiting device Download brochure. 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. For our DC substations, we use the same proven standard medium-voltage switchgear used by utilities and industrial plants. The isolation of the tracks from the earth is not perfect. Sitras PRO combined protection unit and controller Download brochure.
This standard applies to all new lines and to all major revisions to existing lines. The special demands of these rail services are met by air-cooled disc-type diodes with a high blocking voltage. Please use another Browser It looks like you are using a browser that is not fully supported.
Sitras CSG is a type-tested, metal-enclosed indoor switchgear unit with an integrated diode rectifier.