What is the power ratio between power in Star and Delta
circuit?




Answers were Sorted based on User's Feedback



What is the power ratio between power in Star and Delta circuit?..

Answer / karthick

in star connection
line voltage is=(3)^(1/2)*phasevoltage
line current is=phase current
in delta connection
line voltage is =phase voltage
line current is =(3)^(1/2)*phase current

power ratio=( ((3)^(1/2)*phasevoltage*phase current)/((((3)^
(1/2)*phasevoltage*phase current))
so power ratio is =1.

Is This Answer Correct ?    62 Yes 34 No

What is the power ratio between power in Star and Delta circuit?..

Answer / ganeshagraja samanta

the ratio of power in star & delta is 1:3

Is This Answer Correct ?    35 Yes 10 No

What is the power ratio between power in Star and Delta circuit?..

Answer / jothi mahalingam

power ratio b/w star and delta is 1/3.In star, total power
will be 1/3 times of delta total power.

Is This Answer Correct ?    20 Yes 10 No




What is the power ratio between power in Star and Delta circuit?..

Answer / karl

If placing 3 resistors in Delta rather than Star will end
up with 3 times more heating power. This is because you
have sq root of 3 times more voltage across each resistor
in Delta and hence end up with the sq root of 3 times more
current through each resistor. The sq root of 3 of more
voltage times the sq root of 3 of more current than, star
connected resistors means 3 times more power. Capacitor
are often connected in Delta for power factor correction as
this offers 3 times more reactive power than in Star
connection, though be aware they need to be able to cope
with line voltage across each Cap in Delta.

Is This Answer Correct ?    10 Yes 4 No

What is the power ratio between power in Star and Delta circuit?..

Answer / ganesh

Power ratio between star and delta is 1:1
because power in star=line voltage(3^1/2*Vph)*line current
(Iph)=3^1/2VphIph
power in delta =line voltage(Vph)*line current(3^1/2*Iph)
=3^1/2VphIph

Is This Answer Correct ?    22 Yes 17 No

What is the power ratio between power in Star and Delta circuit?..

Answer / alpesh surat

i think transformer just step up or step down voltage or
current only but power remains same(constant).so ratio of
p1 to p2 is 1 when same transformer connected in star or
delta.

Is This Answer Correct ?    13 Yes 11 No

What is the power ratio between power in Star and Delta circuit?..

Answer / reshi

The power transformation ratio in the transformer is
1:1.Only the voltage and currents are subjected to
change.Pri MVA=Secondary MVA. Except to compensate for some
losses.

Is This Answer Correct ?    12 Yes 11 No

What is the power ratio between power in Star and Delta circuit?..

Answer / pratik chhatbar

If placing 3 resistors in Delta rather than Star will end
up with 3 times more heating power. This is because you
have sq root of 3 times more voltage across each resistor
in Delta and hence end up with the sq root of 3 times more
current through each resistor. The sq root of 3 of more
voltage times the sq root of 3 of more current than, star
connected resistors means 3 times more power. Capacitor
are often connected in Delta for power factor correction as
this offers 3 times more reactive power than in Star
connection, though be aware they need to be able to cope
with line voltage across each Cap in Delta.
Thanks

Is This Answer Correct ?    7 Yes 6 No

What is the power ratio between power in Star and Delta circuit?..

Answer / sasi karthick a

The power is depends on the resistance of the winding. Lets
Take "R"ohm resistance of winding and connect in star
configuration.

then transform it to delta. You will see the result. It
will "R/3". So low resistance, high current, power.

Is This Answer Correct ?    0 Yes 0 No

What is the power ratio between power in Star and Delta circuit?..

Answer / priyadharsini

power = 3vicos

in delta Iphase = Iline/rt3.
Vphase = Vline

ie in delta connected ckt P= rt3VphaseIphasecos

IIly in star connected vphase=Vline/rt3,
Iline=Iphase
ie Power = rt3 vpahseIphaseCos
ie. in both star and delta power remain same
therefore the Power ratio = 1.

Is This Answer Correct ?    25 Yes 26 No

Post New Answer



More Electrical Engineering Interview Questions

what is the function of anti-pumping in circuit breaker?

20 Answers   NCC, Aditya Birla, INEL,


sir am giving jspl exam on 19th oct . i belong to eee, so plz send previous question papers ..........to dis id abhilash203@gmail.com

0 Answers  


Between Star-Delta & Star-Star Power transformer which one is efficent for Earth Fault?

10 Answers  


What is the minimum distance between taransformer (say 2000 kva)and its earth pit?

2 Answers   Bhel,


what will happen if capacitor bank is used in generation side?

2 Answers  






can we say current flows inside an atom as electron moves inside an atom?

7 Answers   Vedanta,


Logic using 1 kV or 1,1 kV grade in house wiring Low voltage cable. Explain/suggest? some use 1kV and some prefer 1.1kV grade insulation low voltage cable why??

0 Answers  


why do we prefer a 3-phase delta connected load rather than star connected?

4 Answers  


What_is_mean_by_negative_dc_voltage? why we use -48v except +48v in DC power supply systems.

2 Answers   BSES, APEL,


what will happen if dc machine are supplied by ac source??

2 Answers  


whats the necessary to correct the power factor using capacitive banks in industries?

2 Answers  


transformer is working or not with supply of DC?

2 Answers  






Categories
  • Civil Engineering Interview Questions Civil Engineering (4645)
  • Mechanical Engineering Interview Questions Mechanical Engineering (3705)
  • Electrical Engineering Interview Questions Electrical Engineering (15791)
  • Electronics Communications Interview Questions Electronics Communications (2638)
  • Chemical Engineering Interview Questions Chemical Engineering (762)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (79)
  • Bio Engineering Interview Questions Bio Engineering (30)
  • Metallurgy Interview Questions Metallurgy (95)
  • Industrial Engineering Interview Questions Industrial Engineering (199)
  • Instrumentation Interview Questions Instrumentation (2884)
  • Automobile Engineering Interview Questions Automobile Engineering (171)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (41)
  • Marine Engineering Interview Questions Marine Engineering (62)
  • Power Plant Engineering Interview Questions Power Plant Engineering (170)
  • Engineering AllOther Interview Questions Engineering AllOther (1336)