Electrical Engineering XYZ MCQs
Two transformers operating in parallel will share the load depending on their:
- Efficiency
- Ratings
- Per unit impedance
- Leakage reactance
Correct answer: 3. Per unit impedance
Explanation: Two transformers operating in parallel will primarily share the load according to their per unit impedance. Per unit impedance is a standardized way to express impedance, taking into account the size and ratings of different transformers, making it comparable across different units. It includes both the resistance and reactance of the transformers. The lower the per unit impedance of a transformer, the greater its ability to carry more load relative to other transformers in the system. This ensures that the load distribution between transformers is balanced effectively according to their impedance characteristics, preventing overload and enhancing operational efficiency and stability.