Discussion
Ranking the three reactances of a synchronous machine from smallest to largest gives
Answer: B
Correct answer: subtransient, transient, synchronous
Immediately after a fault the damper windings and the rotor body screen the flux, giving the very small subtransient reactance; as those currents decay the field winding continues to screen, giving the transient value; and finally the steady state synchronous reactance applies. So \( X_d'' < X_d' < X_d \), and the fault current is largest at the first instant.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development