Answer / manoj tyagi

1.for obtaining variable o/p voltage
2.for interconnecting power s/s having voltage ratios,npy
differing far from unity
3.for starting induction $synchronous motor

Answer / sudhir singh

For obtaining variable output voltage we need auto
transformer because in auto transformer much cupper is
saved.
The autotransformer is used as voltage regulator,in
excitation of various machine.

Answer / meenakshi

it has superior voltage regulation,higher efficiency, n
copper saving. and its mainly used to giv boost to
distribution cable for correcting voltage drop,as furnace
transformer for gettn a convenient supply to suit the
furnace winding,as interconnectng transformer n also as
control equipment.

Answer / m c gupta

To get the step down voltage economically as compared to
two winding transformer

Answer / raul

auto- transfomer is used bcoz of its efficiency n ability
to conduct by tranfomation n elecrically and wide range of
voltage variations available ............it is used in
starting 3-phase induction motor..........variac in
laboratory, for voltage control in power system etc

what is the earth resistance ?

5 Answers   Bhel, Cummins,

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what happens when a power transformer neutral earthing broken???

11 Answers   MacLellan,

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why open-delta core of 11kv Potential Transformer is 11000v/1.732/110/3?

1 Answers  

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The unit of quantity of electricity is the:(a) volt(b) coulomb(c) ohm(d) joule

1 Answers  

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what are fluorescent lamps (fluorescent fixtures) & what are incandescen lamps (incandescents fixtures) ? differences between these two ?

1 Answers  

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is IS says that neutral should be brought to switch box. and this one is a recomended practice

0 Answers   Sterling Wilson,

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what is a starter ??

2 Answers   NPTC,

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solar inverters was not connected to the nuteral link .this nutwral possible to any other systems

0 Answers  

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what is frequency transformer?

2 Answers  

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Pl. share your experience about industrial-electronics repair of machine tool.

0 Answers  

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How can calculate HT side VCB? For example I have 1250 KVA load what will be HT side VCB Amp.range and what size XLPE cable I use for HT side.

2 Answers   NASSA, Orchid, SB Automation,

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can anybody find out the result. I am lil bit confused about my equation.

1 Answers   Student,

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