Circulating Current - Single Phase Transformer - Electrical Machines 2

TL;DR

Circulating current flows in transformers connected in parallel due to unequal voltages, causing increased copper loss and overloading.

Transcript

hello friends in previous video we have studied the parallel operation of transformer for the unequal voltage ratios in that video we had derived the equation for the current of both the transformer that is ia and IB in this video we are going to study about the circulating product so basically circulating current can be defined as it is the curren... Read More

Key Insights

• ⚡ Circulating current occurs in parallel transformers due to unequal voltages, impacting system performance.
• ⚡ The circulating current formula considers transformer impedance and voltage differences for accurate calculations.
• 🌸 Undesirable effects of circulating current include increased copper loss and transformer overloading.

Questions & Answers

Q: What causes circulating current in parallel transformers?

Circulating current in parallel transformers is caused by the imbalance in voltages between the transformers, leading to additional current flow and undesirable effects like increased copper loss and overloading.

Q: How does the circulating current formula account for transformer characteristics?

The circulating current formula incorporates transformer impedances and voltages to calculate the current that flows when transformers are connected on no load, impacting system performance.

Q: What are the effects of circulating current on transformer operation?

Circulating current in parallel transformers results in increased copper loss, reduced permissible output, and the risk of overloading, negatively affecting the overall efficiency and reliability of the system.

Q: When does circulating current flow in parallel transformers?

Circulating current flows in parallel transformers only when they are connected on no load, due to the imbalance in voltages between the transformers.

Summary & Key Takeaways

• Circulating current in parallel transformers occurs due to unequal voltages, leading to increased copper loss and transformer overloading.

• The circulating current formula involves a complex equation with terms related to transformer impedance and voltages.

• This current flows only when transformers are connected on no load, impacting overall system performance.