pdf report on auto selection of any available phase in 3 phase supply system
#1

synopsis for auto selection of any available phase in 3 phase supply system
synopsis for auto selection of any available phase in 3 phase supply system
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#2
project on auto selection of any phase from 3 phase suppy
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#3
(09-11-2012, 08:46 AM)Guest Wrote: synopsis for auto selection of any available phase in 3 phase supply system
synopsis for auto selection of any available phase in 3 phase supply system

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#4
auto selection of any available phase in 3 phase supply
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#5
I want project report of auto selection of any available phase in three phase supply system of 100 pages for BE final submission.
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#6
i want project report of "Any available phase in three phase supply system" of 100 pages for BE final report submission.
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#7
good work.......we take a help from internal guide and expert advice on how to phase change from absent phase to available phase.we take a help from internal guide and expert advice on how to phase change from absent phase to available phase.we take a help from internal guide and expert advice on how to phase change from absent phase to available phase.we take a help from internal guide and expert advice on how to phase change from absent phase to available phase..
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#8
pdf report on auto selection of any available phase in 3 phase supply system

The project is designed to provide uninterrupted AC mains supply i.e., 230 volt to a single phase load. This is achieved by automatic changeover of the load from the missing phase to the next available phase in a 3 phase system.

It is often noticed that power interruption in distribution system is about 70% for single phase faults while other two phases are in normal condition. Thus, in any commercial or domestic power supply system where 3 phase is available, it is advisable to have an automatic changeover system for uninterrupted power to critical loads in the event of missing phase.

In this system auto selection is achieved by using a set of relays interconnected in such a way that if one of the relay feeding to the load remains energized always. Under the phase failure condition the corresponding step down transformer secondary delivers zero voltage which is duly rectified to DC and then fed to the logic gates comprising of AND & OR to switch on the next relay that delivers the power to the load.

It also has a provision of connecting to an inverter source which delivers uninterrupted power to the load incase all the 3 phases go missing. The project is supplied with three transformers connected to the 3 phases supply.

Further the project can be enhanced by incorporating power semiconductor devices such as thyristors/IGBTs for instantaneous changeover to the next available phase. This overcomes the drawback of the changeover time generally witnessed by relay switching operations.

Introduction:
Industries require three phases power to run their machinery. Some of them require continuous \ uninterrupted power to maintain their data. We introduce auto phase selector unit for those equipment whose supply is single phase. The single phase supply is selected automatically from three phases supply.

The objective of the APS is to ensure that there is continued commercial power supplied to the site at all times so as to ensure that the Base Transceiver Station (BTS) runs on commercial power until all available phases are either out of electrical tolerance or completely off. This is a micro controller based unit and is used with three phase electrical supply. Whenever the supply of one or two phases of a three phase electrical line goes off, the APS system automatically distributes the electrical supply from the active phase to the failed phases. This ensures continuous power supply through all the three phases even if one phase is active.

The user can operate this system in Auto and Manual Mode. In auto mode the phase is automatically selected by the controller so there will be continuous uninterrupted supply to the unit.

In manual mode the user will select which phase he wants.

A Microcontroller based system will continuously monitor the incoming phase and accordingly display the details on an alphanumeric LCD also it will display the output phase.

Technical Specification

It monitors all three phases and pass one of them.
It displays all available phases on LCD
One LCD and Keypad with three keys are provided for input from user.
If a phase ® is disconnected. New phase (S/T) will select at once and remain connected.
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#9

sir i want the review papers of different authors about the project- auto selection of phase from any available phase in three phase system
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