why we use star connection on the primary side of a
Answers were Sorted based on User's Feedback
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|
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|
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|
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|
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|
how to reverse the direction of universal motor?
bsnl tta exam question
why generator is star connected ?
How to resolve if Diesel generator stop while running ?
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 ??
How to take Vector group test of Transformer?
how is the connection of a 3 phase ct trivector meter done on a pole mounted transformer
Could Please Explain briefly. Why used stabilizing resistance series with High impedance bus differential protection relay.
difference between slippring induction motor and Generator?
Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???
How to calulate Voltage Drop for perticular lentgh of busbar (Cu/ Al)?
why transformer rating comes in kva?