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Question
what is tertiary winding in transformer?What is its purpose?
 Question Submitted By :: Naveedpal
I also faced this Question!!     Rank Answer Posted By  
 
  Re: what is tertiary winding in transformer?What is its purpose?
Answer
# 1
Apart from the Primary & Secondary windings, there
sometimes placed a third winding in power transformers
called "Tertiary Winding".
Its purpose is to provide a cirulating path for the
harmonics (especially third harmonics) produced in the
tranfmormers along with power frequency (50Hz. third
harmonic means 150 Hz oscillations).
 
Is This Answer Correct ?    107 Yes 8 No
Prashanth Kumar Hg
 
  Re: what is tertiary winding in transformer?What is its purpose?
Answer
# 2
Its purpose is to provide a cirulating path for the
harmonics (especially third harmonics) produced in the
tranfmormers.as well as harmonics it may be use for loading
purpose.
 
Is This Answer Correct ?    34 Yes 11 No
Deepak
 
 
 
  Re: what is tertiary winding in transformer?What is its purpose?
Answer
# 3
Its purpose is to provide path for 3rd harmonic currents.
Along with that it can be used for interconnection of power
systems operating at different MVA level.
 
Is This Answer Correct ?    20 Yes 5 No
Raghu
 
  Re: what is tertiary winding in transformer?What is its purpose?
Answer
# 4
If the abnormal condition (unbalance condition) the tertiary
winding is using to give a balance load.
 
Is This Answer Correct ?    7 Yes 22 No
Manikandan
 
  Re: what is tertiary winding in transformer?What is its purpose?
Answer
# 5
tertiary winding , when we require low voltage in
switchyard , we use 3 -winding auto transformer
220/132/11 kV
100/125/200 mva
 
Is This Answer Correct ?    12 Yes 15 No
Mrudang
 
  Re: what is tertiary winding in transformer?What is its purpose?
Answer
# 6
tertiary winding is provided for ELIMINATION OF HARMONICS.

also it is always connected in DELTA.
bcaz in delta the harmonics are eliminated by circulation.
 
Is This Answer Correct ?    15 Yes 5 No
AbhiDewas
 
  Re: what is tertiary winding in transformer?What is its purpose?
Answer
# 7
Apart from the Primary & Secondary windings, there
sometimes placed a third winding in power transformers
called "Tertiary Winding".
Its purpose is to provide a cirulating path for the
harmonics (especially third harmonics) produced in the
tranfmormers along with power frequency (50Hz. third
harmonic means 150 Hz oscillations
 
Is This Answer Correct ?    12 Yes 4 No
Pradeepkumar
 
  Re: what is tertiary winding in transformer?What is its purpose?
Answer
# 8
IT IS A ADDITIONAL WINDING THAT USED FOR LOW VOLTAGE IN
SWITCH YEARD .
 
Is This Answer Correct ?    4 Yes 18 No
Amit Das
 
  Re: what is tertiary winding in transformer?What is its purpose?
Answer
# 9
In Δ - Δ, Δ -λ and λ - Δ transformers all voltages are
balanced and there is no floating of neutral. The floating
of neutral is developed in the case λ- λ connection only.
The transformers are sometimes constructed with three
windings. The main windings are connected to form λ- λ
connection and the third winding known as tertiary winding
is used to make a closed Δ connection to stabilize the
neutrals of both primary and secondary circuits. The
tertiary winding carries the third-harmonic currents.

HARMONICS are caused because of use of high flux densities
in the core. If the core gets saturated during part of the
sinusoidal wave, then secondary wave will be non-
sinusoidal. This may be due to inadequate core area or
characteristics of core material.

Harmonic currents result in higher copper loss, core loss,
magnetic interference and interference with communication
systems.

Harmonic voltages result in increased dielectric loss,
interference with communication systems and resonance
between inductance of the winding and capacitance of
transmission line.
 
Is This Answer Correct ?    7 Yes 8 No
Amit Sharma
 
  Re: what is tertiary winding in transformer?What is its purpose?
Answer
# 10
In delta-delta, delta-star and star-delta transformers all
voltages are balanced and there is no floating of neutral.
The floating of neutral is developed in the case star-star
connection only. The transformers are sometimes constructed
with three windings. The main windings are connected to
form star-star connection and the third winding known as
tertiary winding is used to make a closed delta connection
to stabilize the neutrals of both primary and secondary
circuits. The tertiary winding carries the third-harmonic
currents.

HARMONICS are caused because of use of high flux densities
in the core. If the core gets saturated during part of the
sinusoidal wave, then secondary wave will be non-
sinusoidal. This may be due to inadequate core area or
characteristics of core material.

Harmonic currents result in higher copper loss, core loss,
magnetic interference and interference with communication
systems.

Harmonic voltages result in increased dielectric loss,
interference with communication systems and resonance
between inductance of the winding and capacitance of
transmission line.
 
Is This Answer Correct ?    33 Yes 2 No
Amit Sharma
 

 
 
 
Other Electrical Engineering Interview Questions
 
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Difference between stepper motor & induction motor.   1
What are the commercial names of overhead conductors used in India? UPSC 2
difference between the earth mat and earth grid?   1
3) How earthing is done? How it measured? Write the method for earthing? How the earth resistance is kept low? Innovative-Energy 1
why we are called the 4-20ma transducer,not 0-20 ma transducer??   3
What will happen if primary of transformer is fed with Square wave instead of sinsoidal wave ?Will it operate or Not? Areva 3
what is use of thermistor ?   2
in three phase circuit neutral failure what happend in homes   4
What is working Priniciple of TVSS ???? Emerson 1
why the rating of dc generator is in kw where as rating of alternator is in kva?   2
what is first pole to clear factor ?   2
What is the accepted limit to increase the choosen transformer capacity over the load and why ?   1
 
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