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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If an earth fault occurs broken catenary conductor falling on the ground, for 62128-11there may not be a low-resistance circuit back to the substation due to the electrical isolation between running rails 621128-1 earth ground. Europe ; United States Subject Areas: Sitras CSG is a type-tested, metal-enclosed indoor switchgear unit with an integrated diode rectifier. 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.
Experience high performance An age of extreme urbanization calls for innovative ief flexible mobility concepts. It is important to us that you purchase the right document. Turnkey Rail Solutions Integrated, reliable and sustainable rail systems. Traction power Geographic Terms: Voltage-limiting equipment that can be installed in passenger stations 621228-1 other accessible locations has been developed in response to the requirements of EN These devices quickly connect the running rails to the station structure to eliminate unsafe voltage differences.
Standard oil-insulated or industry-proven cast-resin transformers are used that also fulfill special requirements for fire protection and safety. It looks like you are using a browser that is not fully supported.
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. 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 ieec MVA for operating heavy subways.
The prefabricated type-tested equipment with air or gas insulation complies with all national and international standards and guarantees the highest level of safety for operating personnel. The negative return portion iwc a modern direct current 6212-1 traction power system, which includes the tracks the running railsis normally isolated from earth to the maximum extent practical.
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Sitras REC diode rectifiers Download brochure. The Sitras REC-W is based on the service-proven series of fixed-mounted diode rectifiers using air-cooled disc-type diodes with a high blocking voltage. Modular portfolio DC traction power supply — high-performance, efficient, and safe Reduce costs and save resources using efficient, resilient traction power supply systems.
Rail Services Rail systems must do one thing above all: 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: This standard applies to all new lines and to all major revisions to existing lines.
We recommend that you check the website of the publishers of the international document before making a purchase. For the best experience we suggest that you download the newest version of a supported browser: 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.
Sitras SCD 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.
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.
An age of extreme urbanization calls for innovative and flexible mobility concepts. Benefit from our decades of experience in engineering, construction, and commissioning of DC traction power supply systems. 662128-1
IEC 62128-1 Ed. 2.0 b(2013)
It is designed to cover every economic sector and virtually every activity of the humankind where technical standards may be used. Sitras LCU can be placed at stations or stops or can be integrated into traction substations. 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.
The purpose of this isolation is to prevent stray dc currents from flowing through the earth and potentially causing corrosion of nearby metallic infrastructure.