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Which class of UPS is ideal for data centers?
Suggested Answer: C
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IEC 62040 defines UPS topologies:
VFD: Line-interactive; dependent on mains.
VI: Stabilizes voltage but not frequency.
VFI: Double-conversion online; fully isolates output from mains fluctuations.
Data centers require continuous, clean, and stable power. VFI is the only topology that protects against both voltage and frequency disturbances, meeting ANSI/TIA-942 Rated-3/4 requirements.
Thus, VFI is the ideal UPS class.
24 comments · newest first
AL
Aliza
VI could work, but not as reliable as VFI.
SH
Sheridan
5 days ago
VFD seems risky for data centers.
JO
Joseph
10 days ago
Agreed! VFI offers the best protection.
KE
Keith
15 days ago
I think VFI is the best choice.
ME
Mel
20 days ago
VFI is definitely the ideal option for data centers.
LI
Linwood
26 days ago
First class? What does that even mean?
RU
Rueben
1 month ago
VI is okay, but VFI is more reliable.
MI
Mireya
1 month ago
VFD might work, but not for critical systems.
CH
Charlena
1 month ago
Agreed! VFI handles fluctuations well.
LE
Lenna
2 months ago
I think VFI is the best choice. It offers stable power.
LO
Lon
2 months ago
Surprised to see VFD even mentioned here!
SH
Sheridan
2 months ago
Wait, is VFD really that bad?
AD
Adrianna
2 months ago
Definitely VFI, it handles fluctuations well.
ED
Edmond
2 months ago
I thought VI was more efficient?
GE
Geraldine
2 months ago
VFI is the best choice for data centers!
MU
Muriel
3 months ago
Totally agree, VFI is the way to go!
JE
Jeannetta
3 months ago
Wait, I didn’t know VFI was the top pick!
SA
Sarah
3 months ago
VFD? No way, that’s outdated!
LA
Lashandra
3 months ago
I thought VI was sufficient for most setups?
SH
Shelba
3 months ago
Definitely VFI is the best choice for data centers.
FL
Flo
3 months ago
I believe VFI is ideal because it provides the best protection against power issues, but I should double-check the definitions to be certain.
JU
Jutta
4 months ago
I’m a bit confused about the differences between VFD and VFI. I feel like I need to review their characteristics again.
NO
Nobuko
4 months ago
I remember practicing a question like this, and I think VFI was highlighted as the most reliable option for critical loads.
ST
Stephaine
5 months ago
I think the VFI class is the best choice for data centers, but I’m not entirely sure why it’s preferred over the others.