Difference between Core Type and Shell Type Transformer | | Core Type | Shell Type |
1. | The core is surrounded by the winding. | The core surrounds the winding. |
2. | Natural cooling is provided. | Natural cooling cannot provide. |
3. | The path of the mutual flux magnetic flux is in series. | The outer path of the magnetic mutual flux in the yoke is in parallel. Each of the side limbs carry half of the flux, so their cross-sectional area is half that of central limb. |
4. | Used for low voltage transformers. | Used for high voltage transformer. |
5. | The length of the mean turn of the winding is less. | The length of the mean turn of the winding is more. |
6. | The core has only one magnetic circuit. | It has two magnetic circuits. |
7. | Heat distribution is comparatively less. | Heat distribution is better. |
8. | It has less mechanical protection to coil. | It has better mechanical protection to coil. |
9. | Weight is less. | Weight is more. |
10. | Comparatively not used for very high voltage and high power rating. | Preferred for high voltage and high power rating transformer. |
11. | This transformer is easy to repair. | This transformer is not easy to repair. |
12. | Cost is comparatively less. | More cost. |
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