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Exin Exam CDCS Topic 3 Question 8 Discussion

Actual exam question for Exin's CDCS exam
Question #: 8
Topic #: 3
[All CDCS Questions]

You are allowed to use a calculator for this question. A battery bank is rated at a total capacity of 600 Ah. Calculate how much charging current the rectifier should be able to supply as charging current.

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Suggested Answer: B

To determine the charging current for a battery bank, a general rule of thumb is that the charging current should be 5% of the total battery capacity. For a battery rated at 600 Ah, this calculation would be:

600Ah0.05=30Amperes600 , text{Ah} times 0.05 = 30 , text{Amperes}600Ah0.05=30Amperes

This ensures the battery is charged efficiently without overloading the rectifier or risking battery damage.

Detailed Explanation:

Battery charging current is typically set as a percentage of the battery's capacity to balance effective charging with longevity and safety. A 5% charging rate is standard for lead-acid batteries, which would be 30 Amperes for a 600 Ah battery bank.

EPI Data Center Specialist References:

EPI standards recommend calculating charging currents based on a percentage of the battery capacity to ensure safety and efficiency, aligning with best practices for battery management in data centers.


Contribute your Thoughts:

Patrick
20 days ago
I calculated it as 600 Ah divided by 20 hours, which gives 30 Amperes. So, I think the answer is B) 30 Amperes.
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Herman
20 days ago
I bet the person who wrote this question has a battery bank that can power a small village. 80 Amperes? That's overkill!
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Fatima
21 days ago
I'm not sure, but I think the answer might be B) 30 Amperes.
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Edgar
22 days ago
I agree with Huey, because 600 Ah divided by 10 hours gives 60 Amperes.
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Chan
23 days ago
Wait, did they say we can use a calculator for this? I've been trying to do it in my head. No wonder I'm so confused!
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Genevieve
13 days ago
A) 12 Amperes
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Denny
1 months ago
Wow, this is a tough one. I'm going to go with D) 80 Amperes just to be on the safe side. Better to have too much charging current than not enough!
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Zack
9 days ago
I agree, it's always better to have more charging current than not enough.
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Elenore
10 days ago
I think D) 80 Amperes is a good choice. It's better to be safe than sorry.
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Moira
1 months ago
I think B) 30 Amperes is the correct answer. You don't want to overcharge the battery bank, right? Better to play it safe.
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Destiny
1 months ago
The answer is clearly C) 60 Amperes. It's basic math - the battery bank is rated at 600 Ah, so the charging current should be able to supply that capacity.
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Laquita
14 days ago
Oh, I see. Thanks for clarifying.
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Lezlie
19 days ago
Actually, the correct answer is C) 60 Amperes.
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Bettina
21 days ago
No, it's not B. I believe it's D) 80 Amperes.
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Tamra
22 days ago
I think the answer is B) 30 Amperes.
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Huey
1 months ago
I think the answer is C) 60 Amperes.
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