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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Erasmo

26 days ago

Wait, so do I need a beefy 3X generator for my delta conversion UPS, or a puny 1.3X for my double conversion? This is giving me a headache already.

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Shala

2 months ago

Ah, the age-old battle of double vs. delta conversion. It's like the Coke vs. Pepsi of the UPS world. Option C has the refreshing truth that I'm looking for.

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Sunny

15 hours ago

User 1: I think the primary difference is in how the power is converted.

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Aileen

5 days ago

User 4: Definitely, less power wasted in the conversion process.

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Lauran

14 days ago

User 3: Delta conversion seems more efficient.

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Cordelia

24 days ago

User 2: I agree, double conversion sounds like a lot of unnecessary power conversion.

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Kris

1 months ago

User 1: Option C is the way to go.

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Miles

2 months 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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Marge

26 days ago

Definitely, in 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.

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Lashanda

30 days ago

Option C for the win!

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Avery

2 months ago

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

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Joni

2 months 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

2 months 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

2 months ago

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

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Jovita

2 months ago

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

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Karma

2 months 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

2 months 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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