why we are used D.c. voltage in L.T.side or controling side.we can use UPS als

Categories >> Engineering >> Electrical Engineering
Suggest New Category

why we are used D.c. voltage in L.T.side or controling
side.we can use UPS also ,in place d.c. voltage

Question Posted / manojverma87

5 Answers
8935 Views
ABB, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

why we are used D.c. voltage in L.T.side or controling side.we can use UPS also ,in place d.c. vol..

Answer / gangadhar shailaja bellary

Your question is not perfect.Any way UPS not suply the the
DC voltage is suply a/c only with out interupt.We use DC in
control circuit because it has free from hormonics and it
has constant.

Is This Answer Correct ?

15 Yes

0 No

why we are used D.c. voltage in L.T.side or controling side.we can use UPS also ,in place d.c. vol..

Answer / rajesh vania

Gangadhar say
absolutly right

Is This Answer Correct ?

2 Yes

1 No

why we are used D.c. voltage in L.T.side or controling side.we can use UPS also ,in place d.c. vol..

Answer / nitin bhoraokar

Gangadhar predicted rightly.

Is This Answer Correct ?

1 Yes

0 No

why we are used D.c. voltage in L.T.side or controling side.we can use UPS also ,in place d.c. vol..

Answer / dinesh kumar sharma

dc voltage is necessary for l.t pannels was because dc is
free from harmonics as well as smooth, in dc voltage no
variations are there so controlling becomes easier.
no we can not use ups takes ac to charge battery store in
dc and than when ever supply cut off than battery going to
discharge voltage is converted into dc to ac one of the
example in case of computer
and also ups can be used for smaller duration so why we
use UPS

Is This Answer Correct ?

0 Yes

1 No

why we are used D.c. voltage in L.T.side or controling side.we can use UPS also ,in place d.c. vol..

Answer / mashani

UPS is not DC it's AC....this equipment usually to support
Control system such as Computer Sentral Control....this
equipment is supplied by battery which the battery is DC
source.....and convert by inverter inside UPS to AC source
to supply the emergency equipment...
emergency equipmen is equipment where may not interrupt
even the main source is blackout....
if you mean DC source this could be battery
charger....battery charger ussualy used to operating
controoler....such as PLC, also some electrical equipment
is needed DC source...such as Circuit breaker, ACB(Air
Circuit Breaker) motor inside the breaker is using DC source

Is This Answer Correct ?

0 Yes

4 No

Post New Answer

More Electrical Engineering Interview Questions

Give idea about General Engineering. From which book i can study this topic. Pl. reply me via email. My email is ravi@bhelhwr.co.in, also give the name of book/website, from where i can prepare it.

0 Answers TATA,

why transformer impedance measure in % (percentage)

4 Answers Hindalco,

a 120 60 watt incandescent lamp has to be operated from 50 c/sec 1 phase ac supply. in order to do this a circuit element has to be connect in series with the lamp. which one of the following sries element is preferable.

1 Answers SSC,

What are the differences between single phase and three phase?

0 Answers ABB, Essar,

Name of Hydrocarbon gases.

1 Answers

how can H.V busbar in a powerstation can be protected?

1 Answers Unitech,

what is the main different between distribution transformer and power transformer ?

7 Answers Sail,

how much current carry a 3-1/2 core of 100mm size cable.explain it with solution

2 Answers ACS,

Sir, plz tell me the relation b/w KW and frequency in Variable frequency Drive?

2 Answers

In Single Phase AC Supply,If Voltage between Phase and Neutral is 230V means what will be the Voltage between Phase and Earth?

2 Answers

Upto what extent, the lagging power factor can be improved with the help of capacitors?

6 Answers

What will the effect on a motor designed at 60 HZ, and operated on 50 HZ ??

8 Answers

For more Electrical Engineering Interview Questions Click Here