What is tertiary winding? What is Three Winding Transformer? What are its advantages?

1 Answer

Answer :

A. In some high rating transformers, one winding, in addition to the primary and secondary winding, is used. This is known as Tertiary Winding of Transformer. Because of this third winding, the transformer is called Three Winding Transformer. Advantages: 1. It reduces the unbalancing in the primary due to unbalancing in three phase load. 2. It redistributes the flow of fault current 3. To supply an auxiliary load in different voltage level in addition to its main secondary load.(station lighting and power) 4. As the tertiary winding is connected in delta formation in 3 winding transformer, it assists in limitation of fault current in the event of a short circuit from line to neutral.

Related questions

Description : What is tertiary winding?

Last Answer : Some three phase transformers may have a third winding called tertiary winding apart from primary and secondary. It is also called auxiliary winding or stabilizing winding. The tertiary winding is ... ) to limit short circuit current. iv) to indicate voltage in high voltage testing transformer

Description : What is Three winding transformer?

Last Answer : Three windings are used each work as primary and secondary. Also primary and secondary windings are conductively couple. They are three phase auto transformer

Description : What are the necessary tests to determine the efficiency, voltage regulation, and temperature rise of winding & insulation of transformer?

Last Answer : 1.Direct loading test 2.Open circuit test 3. Short circuit test 4. Sumpner's or back to back test

Description : What is Six winding transformer?

Last Answer : Three windings in primary and three windings in secondary are used, They are three phase transformers.They are connected in either star-star, delta-delta, star delta or delta star.

Description : What is Two winding transformer?

Last Answer : Two separate windings one as primary and other as secondary are used. Both windings are magnetically coupled.

Description : What are the advantages of three phase transformer over three single phase transformer?

Last Answer : 1.Saving in iron material 2. Small size 3. Less transformer oil 4. Economical 5. Higher efficiency

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Last Answer : 1. Continuity of supply 2. Less Installation of cost 3. Easy transportation 4.Stand by function 5.Unbalanced load supply

Description : What are the advantages of shell type transformer over core type transformers?

Last Answer : In shell type transformers the coils are well supported on the all sides and so they can withstand higher mechanical stresses developed during short circuit conditions. Also the leakage reactance will be less in shell type transformers.

Description : 28.In a two winding transformer, the emf /turn in secondary winding is always......the induced emf power turn in primary A. equal to k times B. equal to 1/k times C. equal D. greater than

Last Answer : C. equal

Description : 27] In a transformer, the leakage flux of each winding is proportional to the current in that winding because A. Ohm's law applies to magnetic circuits B. Leakage paths do no saturate C. the two windings are electrically isolated D. mutual flux is confined to the core

Last Answer : B. Leakage path do not saturate

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Last Answer : C. In phase with each other

Description : 12] Which is not the basic element of the transformer? A. core B. primary winding C. secondary winding D. mutual flux

Last Answer : D. Mutual flux

Description : 7 The main advantage of auto transformer over a two winding transformer is A. Hysteresis losses are reduced B. Saving in winding material C. Copper losses are negligible D. Eddy losses are totally eliminated

Last Answer : A) hysteresis losses is reduced

Description : A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary?  (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts

Last Answer : A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary?  (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts

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Last Answer : In the transformer low voltage winding has got more cross-sectional area.

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Last Answer : High voltage winding in a transformer has more number of turns.

Last Answer : High voltage winding of the transformer has less cross-sectional area.

Last Answer :  Sandwich type winding is used in 3 phase shell-type transformer.

Last Answer : yes High Voltage side of Transformer winding have more number of turns. and low voltage side of Transformer winding have less number of turns.

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Last Answer : Insulating and Isolating transformers are identical. These terms are used to describe the isolation of the primary and secondary windings, or insulation between the two. A shielded winding transformer, ... are connected to each other electrically, are not of the insulating or isolating variety.

Description : In transformers, why the low voltage winding is placed near the core?

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Description : What is the supply rated o/p if two single phase transformer connect to give three phase o/p from a three phase I/p?

Last Answer : A. Each transformer is only capable of supplying 86.6%of its o/p rating

Description : How to connect two single phase transformer to give three phase o/p from a three phase I/p ?

Last Answer : A. They would have to connect in an open-delta.

Description : Can a Single Phase Transformer be used on a Three Phase source?

Last Answer : A. Any single phase transformer can be used on a three phase source by connecting the primary leads to any two wires of a three phase system, regardless of whether the source is three phase 3-wire or three phase 4 wire. The transformer output will be single phase.

Description : What are the various types of three phase transformer connections?

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Description : What is single and three phase transformer?

Last Answer : The transformer which works on single phase is called single phase transformer. The transformer which works on three phase is called three phase transformer.

Description : Explain any four advantages of amorphous transformer.

Last Answer : Advantages of amorphous core transformer: 1) Lowest hysteresis loss. 2) Low eddy current loss. 3) Low temperature rise. 4) Up to 75% energy saving using amorphous metal than conventional metal. 5 ... capacity. 9) High Reliability. 10) Excellent short circuit capacity. 11) Less maintenance cost. 

Description : Write any four advantages of instrument transformer.

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Description : Does the transformer draw any current when its secondary is open?

Last Answer : Yes, no-load primary current.

Description : What current flows in the transformer primary when its secondary is open?

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Description : What are the transformer losses?

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Description : At what power maximum efficiency of power transformer and distribution transformer is designed

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Description : During No load why the power factor of the transformer is very low ?

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Description : What is the 3 ph transformer ?

Last Answer : A. A 3ph transformer is that transformer which is equivalent to three single phase transformer but wound on one core and enclosed within one common case.

Description : What parameters or technical particulars are important to be considered while designing protection scheme of the transformer?

Last Answer : 1.Network Diagram showing the position of the transformer in the system 2.kVA or MVA rating of the transformer 3.Fault Level at the transformer 4.Voltage Ratio 5.Winding Connections 6.Per Unit ... Oil Filled 11.Length and area of cross section of the connecting leads between CTs and Relay Panel

Description : What can be the reasons for the failure of the transformer?

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Description : How Transformer Protection provided for internal faults?

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Description : How does change in frequency affect the operation of a given transformer?

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Description : WHAT is ZIG ZAG Grounding Transformer

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Description : What is Meant by Temperature Rise in a Transformer?

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Description : What is Meant by Regulation in a Transformer?

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Description : What is Polarity, When Associated With a Transformer?

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Description : During No load why the power factor of the transformer is very low ?

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Description : Explain about auto transformer?

Last Answer : A. It is type of transformer with only one winding a portion of which is shared by both primary and secondary. Advantages: It is used where transformation ratio differs little from unity. As ... voltage as per out requirements and can smoothly increase or decrease its value as per our requirement.

Description : Explain about the open and short circuit tests on transformer?

Last Answer : A. Open circuit test (No load test) and short circuit test (full load test) are performed on a transformer to determine (i) Equivalent circuit of transformer (ii) Voltage ... determine copper loss in transformer at full load and parameters of approximate equivalent circuit of transformer.

Description : EMF equation of the transformer?

Last Answer : A. E = 4.44ΦmfN Volts. If E1 & E2 are primary and secondary emf’s and N1 & N2 are primary and secondary turns then, Voltage ratio= E1/E2 and Turns ratio of transformer = N1/N2 E1/E2 = N1/N2