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A 750 A circuit uses thyristor of current rating 175 A. If derating is 25%, the number of thyristors in parallel is
- a)3
- b)4
- c)6
- d)10
Correct answer is option 'C'. Can you explain this answer?
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A 750 A circuit uses thyristor of current rating 175 A. If derating is...
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A 750 A circuit uses thyristor of current rating 175 A. If derating is...
If the thyristor is derated by 25% means it will have capacity of carrying only 75% current . 75% current means 175*0.75 i.e 131.25 amps. as the thyristor are connected in parallel therefore the no of thyristor = total current /current in each thyristor = 750/131.25
i.e 5.71 or approx 6
i.e 5.71 or approx 6
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A 750 A circuit uses thyristor of current rating 175 A. If derating is...
Given:
Circuit current rating = 750 A
Thyristor current rating = 175 A
Derating = 25%
To find: Number of thyristors in parallel
Explanation:
1. Derating is a technique used to reduce the current rating of a component to ensure its safe operation. In this case, the thyristor's current rating is reduced by 25% due to derating.
2. Derating factor = 1 - (Derating % / 100)
Derating factor = 1 - (25 / 100)
Derating factor = 1 - 0.25
Derating factor = 0.75
3. The total current rating required by the circuit can be calculated by dividing the circuit current rating by the derating factor.
Total current rating = Circuit current rating / Derating factor
Total current rating = 750 A / 0.75
Total current rating = 1000 A
4. To determine the number of thyristors in parallel, divide the total current rating by the thyristor current rating.
Number of thyristors in parallel = Total current rating / Thyristor current rating
Number of thyristors in parallel = 1000 A / 175 A
Number of thyristors in parallel ≈ 5.71
5. The number of thyristors in parallel should be a whole number, so we round the calculated value up to the nearest integer.
Number of thyristors in parallel ≈ 6
Therefore, the correct answer is option C) 6.
Circuit current rating = 750 A
Thyristor current rating = 175 A
Derating = 25%
To find: Number of thyristors in parallel
Explanation:
1. Derating is a technique used to reduce the current rating of a component to ensure its safe operation. In this case, the thyristor's current rating is reduced by 25% due to derating.
2. Derating factor = 1 - (Derating % / 100)
Derating factor = 1 - (25 / 100)
Derating factor = 1 - 0.25
Derating factor = 0.75
3. The total current rating required by the circuit can be calculated by dividing the circuit current rating by the derating factor.
Total current rating = Circuit current rating / Derating factor
Total current rating = 750 A / 0.75
Total current rating = 1000 A
4. To determine the number of thyristors in parallel, divide the total current rating by the thyristor current rating.
Number of thyristors in parallel = Total current rating / Thyristor current rating
Number of thyristors in parallel = 1000 A / 175 A
Number of thyristors in parallel ≈ 5.71
5. The number of thyristors in parallel should be a whole number, so we round the calculated value up to the nearest integer.
Number of thyristors in parallel ≈ 6
Therefore, the correct answer is option C) 6.
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A 750 A circuit uses thyristor of current rating 175 A. If derating is 25%, the number of thyristors in parallel isa)3b)4c)6d)10Correct answer is option 'C'. Can you explain this answer?
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A 750 A circuit uses thyristor of current rating 175 A. If derating is 25%, the number of thyristors in parallel isa)3b)4c)6d)10Correct answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 750 A circuit uses thyristor of current rating 175 A. If derating is 25%, the number of thyristors in parallel isa)3b)4c)6d)10Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 750 A circuit uses thyristor of current rating 175 A. If derating is 25%, the number of thyristors in parallel isa)3b)4c)6d)10Correct answer is option 'C'. Can you explain this answer?.
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