APC Exam DU0-001 Topic 1 Question 71 Discussion

Actual exam question for APC's DU0-001 exam

Question #: 71
Topic #: 1

What is the primary difference between double conversion and delta

conversion UPS systems?

ADouble conversion UPSs require a 1.3X generator oversizing. Delta
conversion UPSs require a 3X generator oversizing.

BDouble conversion UPSs are practical in size ranges from 0 - 20 kW.
Delta conversion UPSs are practical in size ranges of 20 kW to 1 MW.

CIn a double conversion UPS, 100% of the power is converted from AC to
DC and then again from DC to AC. In a delta conversion UPS, only the
difference between input and output power is converted.

DIn a double conversion UPS, the transformer has a special ferro-resonant
capability, which provides limited voltage regulation and output waveform
shaping. In a delta conversion UPS, a standard transformer is used.
,

Show Suggested Answer

Suggested Answer: A

by Golda at Jul 03, 2023, 08:12 PM

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Miles

5 hours ago

Haha, this question is a real 'delta' of knowledge! Although, I guess you could say it's a 'double' challenge to really understand the difference. Option C for the win!

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Avery

1 days ago

So, that means option C is the correct answer, right?

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Joni

1 days ago

Hmm, I was leaning towards option B, but now I'm not so sure. The size range details are good to know, but option C really breaks down the conversion process in a clear way.

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Dino

3 days ago

Yes, in double conversion UPSs, all the power is converted, while in delta conversion UPSs, only the difference is converted.

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Avery

5 days ago

I think the primary difference is in how the power is converted.

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Jovita

8 days ago

That's right. Whereas in delta conversion UPSs, only the difference between input and output power is converted.

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Karma

9 days ago

Yes, in double conversion UPSs, 100% of the power is converted from AC to DC and then back to AC.

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Luke

9 days ago

Option C seems to hit the nail on the head. The key difference is that double conversion UPSs fully convert the power, while delta conversion UPSs only convert the difference between input and output. That's a pretty fundamental distinction.

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Lucina

11 days ago

I think the primary difference is in how the power is converted.

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