Summary of "Dry type transformer vs Oil type transformer | Key differences"

Comparison of Dry Type and Oil Type Transformers

The video compares dry type transformers and oil type transformers, focusing on their key technological differences, features, advantages, and disadvantages.

Key Differences

Cooling Medium
- Dry type: Uses natural or forced air to cool the core and windings.
- Oil type: Uses mineral oil for cooling.
- Safety: Mineral oil poses fire and explosion risks due to insulation failures and oil vaporization, making oil type transformers unsuitable for public places. Dry type transformers are safer and can be installed anywhere.
Maintenance
- Dry type: Requires minimal to no special maintenance.
- Oil type: Requires regular maintenance, including oil sampling to check contamination and periodic replacement of breathers.
Noise
- Dry type: Noisier due to magnetostriction causing vibration of laminated steel core sheets and exposed windings.
- Oil type: Quieter as the oil dampens vibrations.
Efficiency and Performance
- Dry type: Less efficient, limited voltage ratings, prone to overheating under overload, and higher electrical losses.
- Oil type: More efficient with better overload handling.
Cost
- Dry type: More expensive for the same rating and basic model.
- Oil type: More economical.

Application Recommendations

Dry type transformers are preferred in public or safety-sensitive areas due to their fire safety and low maintenance requirements.
Oil type transformers are suitable for remote areas where cost and overload capability are prioritized.

Additional Notes

Transformer noise primarily results from magnetostriction.
Oil type transformers have a higher risk of failure related to internal insulation and oil vaporization.