why we use star connection on the primary side of a

Answers were Sorted based on User's Feedback

why we use star connection on the primary side of a transformer?..

Answer / habib

Transformer primary is not in star we can say for all
transformer HV side should be in star,because in star Phase
voltage will be reduced by 1.732 times to delta,so it
reduces the insulation requirment.

Second in Generating station transformers load side that
means the side which will be connect to the grid will be in
star,because grid distubances should not circulate in
transformer if it is in delta distrubances circulate in the
transformer which reduces the transformer performance

Is This Answer Correct ?    56 Yes 7 No

why we use star connection on the primary side of a transformer?..

Answer / niranajn

since the phase voltage for star connection is 1/sqrt3
times of line voltage the insulation required is less .So
the primary side is star connected

Is This Answer Correct ?    19 Yes 4 No

why we use star connection on the primary side of a transformer?..

Answer / rakesh

in star connection the phase voltage is reduced by 1.732
times than the line voltage, since the voltage is reduced
the insulation required in the winding of the transformer
also reduces.so it economical to connect the primary side
of the step down transformer i.e the hv side,in star

Is This Answer Correct ?    7 Yes 0 No

why we use star connection on the primary side of a transformer?..

Answer / mukhesh

we cant tell always primary is star depend on riqiements
because at genareting station lv side is connected to
station and see side should be star bcz step ujp the
voltage and disubutuin side lv side always seec side is
star bcz it has nutral

Is This Answer Correct ?    3 Yes 1 No

why we use star connection on the primary side of a transformer?..

Answer / santosh

Always HT volts are the out put of a EHV transformer which is Delta-Delta connection.But in general Distribution transformer,We have HT(11kv) primary side and LT(415v) secondary side. So 11kv should be Connected with delta connection and 415v should have star connection.

Mainly LV/2ndary side connected to home appliances,which is running with 1-phase and 1-neutral.

Is This Answer Correct ?    0 Yes 0 No

Post New Answer

More Electrical Engineering Interview Questions

how to reverse the direction of universal motor?

2 Answers   Finolex, TATA, JGT,

bsnl tta exam question

0 Answers  

why generator is star connected ?

3 Answers   Voltech,

How to resolve if Diesel generator stop while running ?

0 Answers   Toyota,

an off load but energized 11/0.4 KV, 1250 KVA T/F has a power factor of 0.65(capacitive)..!! why is it so, though T/F being an inductive device ??

4 Answers  

How to take Vector group test of Transformer?

16 Answers   Sunflag Steel, Zuari Cements,

how is the connection of a 3 phase ct trivector meter done on a pole mounted transformer

0 Answers  

Could Please Explain briefly. Why used stabilizing resistance series with High impedance bus differential protection relay.

0 Answers   NCC,

difference between slippring induction motor and Generator?

1 Answers  

Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???

0 Answers  

How to calulate Voltage Drop for perticular lentgh of busbar (Cu/ Al)?

1 Answers  

why transformer rating comes in kva?

4 Answers   Tech Mahindra, HNG,

  • Civil Engineering Interview Questions Civil Engineering (4635)
  • Mechanical Engineering Interview Questions Mechanical Engineering (3700)
  • Electrical Engineering Interview Questions Electrical Engineering (15765)
  • Electronics Communications Interview Questions Electronics Communications (2636)
  • 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 (2878)
  • 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 (169)
  • Engineering AllOther Interview Questions Engineering AllOther (1334)