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Exin Exam CDCS Topic 2 Question 10 Discussion

Actual exam question for Exin's CDCS exam
Question #: 10
Topic #: 2
[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:

Georgeanna
2 days ago
I'm not sure, but I think the answer might be B) 30 Amperes.
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Kristofer
10 days ago
I agree with Wilda, because 600 Ah divided by 10 hours gives 60 Amperes.
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Murray
11 days ago
This is easy! The answer is definitely A) 12 Amperes. I mean, come on, 600 Ah? Who needs that much power for a battery bank? 12 Amps is more than enough.
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Wilda
16 days ago
I think the answer is C) 60 Amperes.
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Hyman
16 days ago
Hmm, this one's tricky. I'm going to go with D) 80 Amperes just to be on the safe side. Better to have a bit of extra charging power, right?
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Halina
3 days ago
I agree, it's always better to have a bit of extra charging power just in case.
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Alona
11 days ago
I think you're right, D) 80 Amperes seems like a safe choice.
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Stephen
28 days ago
B) 30 Amperes sounds about right to me. The battery bank capacity is a bit high, so the rectifier might not need to supply the full 600 Ah.
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Dianne
6 days ago
A) 12 Amperes
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Verda
30 days ago
I think the answer is C) 60 Amperes. The question states the battery bank has a total capacity of 600 Ah, so the rectifier should be able to supply the full capacity as the charging current.
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Lonna
23 days ago
I agree, the answer is C) 60 Amperes.
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