CONSTRUCTION of TRANSFORMERS

1. CONSTRUCTION ofTRANSFORMERS

2. Construction of Transformers In order to approach the characteristics of an ideal transformer the following design features are used, • Core is made up of thin sheet ofsilicon steel laminations • to reduce eddy current lossandhysteresis loss • 2. One half of each winding on one limb to ensure tight coupling, structural symmetry • 3. Windings are made up off usually copper wires, and winding resistance must be less

3. Construction of Transformers Depending upon the manner in which primary and secondary are wound on the core transformers are two types • Core type transformer • Shell type transformer

4. Construction of Transformers • Core type transformer • Half of each winding in one limb and other half on other limb • LV wound below the HV to reduce insulation and mechanical consideration • core is surrounding by winding

5. Construction of Transformers • Core type transformer • L shaped strips are used

6. Construction of Transformers • Core type transformer • L shaped strips are used

7. Construction of Transformers • Core type transformer • L shaped strips are used

8. Construction of Transformers • Shell type transformer • Both windings are wound in central limb • LV wound below the HV to reduce insulation and mechanical consideration and it also near the core • Winding is surrounding by core • E or F shaped strips are used

9. Construction of Transformers • Shell typetransformer • Both windings are wound in central limb • E or F shaped strips are used

10. Construction of Transformers • Shell transformer • Both windings are wound in central limb • E or F shaped strips are used

11. Construction of Transformers Depending upon the manner in which primary and secondary are wound on the core transformers are two types • Core typetransformer used high voltage • Shell type transformer used low voltage