During open circuit test of a transformer:
Correct answer: A. primary is supplied rated voltage
- A. primary is supplied rated voltage
- B. primary is supplied full-load current
- C. primary is supplied current at reduced voltage
- D. primary is supplied rated kVA
Explanation
The open-circuit test is performed at rated voltage so that the normal operating core flux and core loss are produced. Since the secondary is open, only a small magnetising current flows.
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