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In order to minimize the inrush current in a single-phase transformer, the supply switch should be closed at the instant when:
- a)supply voltage is 1/2 times the maximum voltage
- b)supply voltage is 1/√2 times the maximum voltage
- c)supply voltage is maximum
- d)supply voltage is zero
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
In order to minimize the inrush current in a single-phase transformer,...
- Magnetizing inrush current in transformer is the current which is drawn by a transformer at the time of energizing it.
- To have minimum inrush current in the transformer the switch-on instant should be at maximum input voltage
- This inrush current is transient in nature and exists for few milliseconds.
- The inrush current may be up to 10 times higher than the normal rated current of the transformer.
- Although the magnitude of inrush current is high it generally does not create any permanent fault in the transformer as it exists for a very small time.
- But still, inrush current in a power transformer is a problem, because it interferes with the operation of circuits as they have been designed to function.
- Some effects of high inrush current include nuisance fuse or breaker interruptions, as well as arcing and failure of primary circuit components, such as switches. Another side effect of high inrush is the injection of noise.
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In order to minimize the inrush current in a single-phase transformer, the supply switch should be closed at the instant when:a)supply voltage is 1/2times the maximum voltageb)supply voltage is 1/√2times the maximum voltagec)supply voltage is maximumd)supply voltage is zeroCorrect answer is option 'C'. Can you explain this answer?
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In order to minimize the inrush current in a single-phase transformer, the supply switch should be closed at the instant when:a)supply voltage is 1/2times the maximum voltageb)supply voltage is 1/√2times the maximum voltagec)supply voltage is maximumd)supply voltage is zeroCorrect answer is option 'C'. Can you explain this answer? for EmSAT Achieve 2025 is part of EmSAT Achieve preparation. The Question and answers have been prepared according to the EmSAT Achieve exam syllabus. Information about In order to minimize the inrush current in a single-phase transformer, the supply switch should be closed at the instant when:a)supply voltage is 1/2times the maximum voltageb)supply voltage is 1/√2times the maximum voltagec)supply voltage is maximumd)supply voltage is zeroCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for EmSAT Achieve 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In order to minimize the inrush current in a single-phase transformer, the supply switch should be closed at the instant when:a)supply voltage is 1/2times the maximum voltageb)supply voltage is 1/√2times the maximum voltagec)supply voltage is maximumd)supply voltage is zeroCorrect answer is option 'C'. Can you explain this answer?.
In order to minimize the inrush current in a single-phase transformer, the supply switch should be closed at the instant when:a)supply voltage is 1/2times the maximum voltageb)supply voltage is 1/√2times the maximum voltagec)supply voltage is maximumd)supply voltage is zeroCorrect answer is option 'C'. Can you explain this answer? for EmSAT Achieve 2025 is part of EmSAT Achieve preparation. The Question and answers have been prepared according to the EmSAT Achieve exam syllabus. Information about In order to minimize the inrush current in a single-phase transformer, the supply switch should be closed at the instant when:a)supply voltage is 1/2times the maximum voltageb)supply voltage is 1/√2times the maximum voltagec)supply voltage is maximumd)supply voltage is zeroCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for EmSAT Achieve 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In order to minimize the inrush current in a single-phase transformer, the supply switch should be closed at the instant when:a)supply voltage is 1/2times the maximum voltageb)supply voltage is 1/√2times the maximum voltagec)supply voltage is maximumd)supply voltage is zeroCorrect answer is option 'C'. Can you explain this answer?.
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