Understanding Efficiency and Regulation of Transformers — Lesson 7

This lesson covers the concept of estimating the efficiency of power transformers. It explains the calculation of power efficiency and introduces the concept of energy efficiency, particularly in relation to distribution transformers. The lesson also discusses how to calculate the degree of loading for transformers under different conditions. It further delves into the topic of transformer regulation, explaining how it is calculated and why it is important. For instance, a practical example is given where a transformer's regulation is calculated based on the change in voltage from no load to full load.

Video Highlights

00:35 - Explanation of power efficiency calculation
03:00 - Introduction to energy efficiency
14:37 - Explanation of transformer regulation
21:20 - Practical example of calculating transformer regulation

Key Takeaways

• Energy efficiency, also known as all-day efficiency, is particularly important for distribution transformers.
• The degree of loading of a transformer is calculated based on the rated KVA of the transformer and the KVA it is handling at a particular interval of time.
• Transformer regulation is calculated based on the change in voltage from no load to full load. A good transformer should have a small regulation value, indicating a small change in voltage.