Are Smart-UPS VT rack-mount units On-Line or Off-Line design??

[Anonymous user]

I'm specifying aa couple of APC Smart-UPS. They are VT rack-mount design with 208V, 4-Wire Input and Output. Rating 20 kVA. Model # is SUVTR20KF4B5S

Nowhere in the technical literature am I able to find whether these units are true On-Line (Double Conversion) design or if they are Off-Line (switch to UPS only as necessry). Can anyone clarify where this is identified?

[upsguy_apc · Accepted solution]

http://www.apcmedia.com/salestools/ALEX-743QS3_R2_EN.pdf

The SUVT is a double conversion UPS.

+1.3 MODES OF OPERATION+
A. Normal: The input converter and output inverter shall operate in an on-line manner to
continuously regulate power to the critical load. The input and output converters shall
be capable of full battery recharge while simultaneously providing regulated power to
the load for all line and load conditions within the range of the UPS specifications.