Rating of Single Phase Transformer — Lesson 6

This lesson covers the concept of equivalent circuits of transformers, their ratings, and how to specify them. The lesson also discusses the voltage rating of the primary and secondary side, and the current carrying capacity of the coils on both sides. The lesson further explains how to calculate the rated current of the HV and LV side, and the importance of not exceeding the rated current. It also touches on the concept of transformer impedance and how it can be manipulated.

Video Highlights

00:29 - Explanation of the equivalent circuit model
04:09 - Explanation of the KVA rating of transformers
14:17 - Explanation of the full load condition of transformers
23:15 - Explanation of the equivalent circuit referred to the source
25:40 - Explanation of the equivalent circuit referred to the load

Key Takeaways

  • The product of voltage and current on the primary and secondary side of a transformer remains constant.
  • The voltage rating of the primary and secondary side, and the current carrying capacity of the coils on both sides, are crucial in specifying a transformer.
  • The rated current of the HV and LV side can be calculated using the KVA rating.
  • It's important not to exceed the rated current when connecting a load to a transformer.
  • Transformer impedance can be manipulated, and the equivalent circuit can be calculated with respect to the source.