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1. Submitted to: Submitted By Seminarppt.com Seminarppt.com Seminar on Transformers SeminarPpt.com

2. Table Contents Definition Introduction Parts of Transformer Functions of Transformer Conclusion 2

3. Definition A transformer is an important device used for stepping up or stepping down voltage or current without changing the frequency. 3

4. Introduction There are different parts of transformer . Laminated core Windings Insulating materials Transformer oil Conservator tank Buchholz Relay Breather Cooling tubes Tap Changer Explosion vent 4

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6. Parts of Transformer Laminated core The main function of a laminated core is to separate primary and secondary windings. The core is laminated in order to reduce the core losses in a transformer. The core is generally made up of Cold Rolled Grain Oriented (CRGO) steel material. ●●● 6

7. Parts of Transformer Windings Generally, copper windings are used in the transformers. The main function of windings is to produce magnetic flux and induce mutual EMFs. These windings carry high voltage and current through them. ●●● 7

8. Parts of Transformer Insulating materials The main function of insulating material is to provide insulation to windings so that it does not come in contact with the transformer core or other conducting material. The windings are wrapped in insulating paper or cloth. ●●● 8

9. Parts of Transformer Transformer oil The main function of the transformer oil is to provide insulation as well as act as a cooling agent due to its chemical properties and dielectric strength. It dissipates heat generated from the core and windings to the environment. ●●● 9

10. Parts of Transformer Conservator tank The main function of a conservator tank is to provide extra space to accommodate the transformer oil during oil expansion inside the transformer when the ambient temperature rises. ●●● 10

11. Parts of Transformer Buchholz relay The main function of the Buchholz relay is to protect the transformer from different internal faults such as inter-turn fault, short circuit fault, etc. It detects the occurrence of a fault and generates the alarm circuit. ●●● 11

12. Parts of Transformer Breather The main function of a breather is to prevent moisture to enter the transformer during the breathing cycle of a transformer. It contains the silica gel that absorbs the moisture from the air and hence prevents transformer oil to contaminate and thereby saves the internal parts. ●●● 12

13. Parts of Transformer Cooling tubes The main function of the cooling tubes is to transfer heat from the transformer core and coils to the environment. The heated transformer oil circulates through the cooling tubes where the heat radiates out by natural airflow and hence cooling the transformer oil. ●●● 13

14. Parts of Transformer Tap Changer The main function of the tap changer is to regulate the transformer output voltage by altering the number of turns in one winding and thereby changing the turn ratio of the transformer. ●●● 14

15. Parts of Transformer Explosion vent The main function of the explosion vent is to provide protection against excessive pressure build-up in the transformer during heavy internal faults. It allows releasing hot boiling transformer oil in order to avoid the explosion of the transformer. 15

16. Functions of Transformer A transformer is a device that transfers electrical energy from one circuit to another. Mutual induction connects two circuits. It is also utilized for electrical power transmission via electromagnetic induction. Electric power is transferred without even any frequency modification. 16

17. Conclusion Transformers are used in electric circuits to change the voltage of electricity flowing in the circuit. It is used to increase the voltage (called 'stepping up') or decrease the voltage ('stepping down') in AC circuits. 17

18. References Wikipedia.org Google.com Seminarppt.com Studymafia.org

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