Understanding Transformer Cooling and Tap Changers — Lesson 9

This lesson covers the cooling mechanisms and tap changers in transformers. It explains how large transformers require additional cooling methods due to their size and power, such as cooling tubes and radiators. The lesson also discusses the concept of emissivity, which is a material's ability to emit heat. It further delves into the different types of cooling methods, including air natural cooling, oil natural cooling, and forced cooling. The lesson also introduces the concept of tap changers, which are used to adjust the voltage output of a transformer. It explains how tap changers work, why they are usually located on the high voltage (HV) side of a transformer, and how they can be used to increase or decrease the voltage depending on the situation.

Video Highlights

03:10 - Explanation of the use of radiators in transformer cooling
06:32 - Discussion on the impact of transformer size on cooling needs
27:12 - Introduction to the concept of tap changers in transformers
31:14 - Discussion on the placement of tap changers in transformers
34:36 - Conclusion of the lecture and introduction to the next session

Key Takeaways

• Large transformers require additional cooling methods due to their size and power. These methods include cooling tubes and radiators.
• Emissivity, a material's ability to emit heat, plays a crucial role in transformer cooling.
• Tap changers are used to adjust the voltage output of a transformer. They are usually located on the high voltage (HV) side of a transformer.
• Tap changers can be used to increase or decrease the voltage depending on the situation.