Abstract

A proponent of sustainable mobility, Alstom provides a complete range of systems, equipment and services in the railway sector. Alstom India is comprised of four businesses: Rolling stock & Components, Systems & Infrastructure, Transport Information Solutions and Train Life Services. With a full range of highly advanced products and solutions and a strong local footprint, it is well geared to participate in the upcoming rail transportation projects in India and South Asia, including high speed train projects.

Alstom is a leading ....etc

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Overvoltage protection concept for DC railway systems

ABSTRACT

Overvoltages in electrical networks result from the effects of lightning strokes and switching actions and cannot be avoided. Furthermore, the power supply of electrical railways is endangered by direct or nearby lightning. A new device, combining protection against overvoltages and touch voltages and protection of people is introduced. Protection concepts for DC railway systems are introduced, considering the different insulation of ....etc

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This power failure alarm project is a power supply monitoring device that will trigger a buzzer when the mains supply cuts off. At the same time, the light emitting diode will be turned ON. This device is helpful to inform the loss of power supply to some critical installation such as a pump in a fish tank. Once the buzzer sound, you will know that there is a loss of power supply and actions need to be taken to rectify the situation by providing alternative power supply or relocating the installation. ....etc

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ac main phase sequence indicator is our projece so i need the diagram in it ....etc

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MAINS MANAGER



Very often we forget to switch off
the peripherals like monitor, scanner,
and printer while switching off
our PC. The problem is that there are separate
power switches to turn the peripherals
off. Normally, the peripherals are connected
to a single of those four-way trailing
sockets that are plugged into a single
wall socket. If that socket is accessible, all
the devices could be switched off from
there and none of the equipment used will
require any modificatio ....etc

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This article describes the Voltage swell and overvoltage compensation problems in a diode-bridge rectifier supported transformerless-coupled
dynamic voltage restorer (DVR). applying conventional in-phase or phase-invariant boosting method in case of condition of swell or overvoltage, may cause a a rapid rise in dc-link voltage which may ultimately lead to the damage of the storage capacitors and switching devices, and increase the switching loss. The minimum energy injection scheme is unable to solve these problems. Here, a novel unidirection ....etc

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please guide me about theory to find frequency of ac through sonometer ....etc

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A sound level meter is a hollow wodden box used in the laboratory to study the transverse vibrations of the string. It is also called monochord because it often has only one sequence. In the rectangular box of wood there are two fixed bridges, near the ends, and at one end there is a pulley. A rope, often a steel wire is attached at one end over the bridges and pulley, and attached to a weight support that hangs below the pulley. Weights may be added to the support to cause tension in the wire, and a third movable bridge may be placed below it ....etc

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i want the advantage and disadvantage of digital mains failure/resumption alarm ....etc

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to get information about the topic overvoltage protection matlab programfull report refer the page link bellow

http://seminarsprojects.net/Thread-overvoltage-protection-concept-for-dc-railway-systems?pid=63918&mode=threaded ....etc

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