Discussion
While conducting a short-circuit test on a transformer, if the LV winding is shorted, what is the approximate voltage required to circulate the full-load current?
Answer: A
In the short circuit test of a transformer one winding is shorted and a low voltage is applied to the other, raised until the rated full-load current flows. The voltage required is only the voltage drop across the transformer's own impedance, which is a small fraction of the rated voltage, about 5 to 8 percent. Values of 20 to 33, 45 to 60 and 90 to 100 percent would drive a current far above the rated one through the short circuit. The answer is 5-8% of rated voltage, option (A).
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