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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Rail Services Rail systems must do one thing above all: This paper will review current American and European standards and codes for 62128–1 permissible rail voltage on direct current traction power systems.
Sitras SCD short-circuiting device Download brochure. Sitras REC type rectifiers are designed to supply traction power to DC-operated mass transit systems and main-line railways.
Our end-to-end modular portfolio of converters, DC switchgear, and protection systems lets you operate your rail systems with confidence — and with top performance, efficiency, and safety. It is important to us that you purchase the right document.
Sitras SCD-C compact short-circuiting device for DC traction ic 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 prefabricated type-tested equipment with air or gas insulation complies with all national 6128-1 international standards and guarantees the highest level of safety for ifc personnel. Sitras CSG is a type-tested, metal-enclosed indoor switchgear unit with an integrated diode rectifier.
The isolation of the tracks from the earth is not perfect. The purpose of this isolation is to prevent stray dc currents from flowing through the earth and potentially causing corrosion of nearby metallic infrastructure. Benefit from our decades of experience in engineering, construction, and iiec of DC traction power supply systems. Protection Always on the safe side Proven protection for contact lines, future-proof and easy to operate: A secure power supply for your contact lines: Modular portfolio DC traction power supply — high-performance, efficient, and safe Reduce costs oec save resources using efficient, resilient traction power supply systems.
Rail systems must do one thing above all: 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.
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Sitras SCD reduces excessively high voltage by reliably short-circuiting the return circuit and structure ground temporarily. 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.
Recharging occurs during dwell time by an overhead conductor rail. For our DC substations, we use the same proven standard medium-voltage switchgear used by utilities and industrial plants. If an earth fault occurs broken catenary conductor falling on the ground, for examplethere may not be a low-resistance circuit back to the substation due to the electrical isolation between running rails and earth ground.
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. The principles of negative grounding device operation and corresponding voltage settings will also be discussed.
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. Reduce your voltage with transformers and use rectifiers to convert AC to DC current.
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. Rectifier group Achieve maximum cost-effectiveness A secure power supply for your contact lines: Protective provisions against electric shock This document has been re-assessed by the committee, and judged to still be up to date. If you need help with the purchase or have any queries please email enquiries standards.
Proven protection for contact lines: Or they could be impressed on a person walking along the tracks. 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.
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. Sitras LCU local charging unit Download brochure.