American Power Conversion Smart-UPS VT Power Supply User Manual


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22 Smart-UPS® VT 10-30 kVA, 208/220 V and XR Battery Enclosure Operation Manual 990-1599B
Total-Power-Off Procedure
Set the DC disconnect switch on the XR Enclosure (if available) to the OFF position.
Remove all batteries from the system, or, alternatively, pull out all batteries to the red
disconnect line shown on the battery. To ensure sufficient stability, do not pull batteries out
beyond the red disconnect line unless completely removing them from the Enclosure.
Set the utility breaker to the OFF or LOCKED-OUT position. If the UPS has dual mains supply,
set both supplies to the OFF or LOCKED-OUT position.
WARNING!
Risk of electric shock – parts inside the UPS and XR Batterty Enclosure are energized
from the battery supply even when the AC power is disconnected. Before electrical
installation begins, follow the Total-Power-Off procedure to completely de-energize the
system.
WARNING!
Correct lock-out procedures at utility breaker must be followed. If necessary, install a
padlock.
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ON
OFF
XR Battery Enclosure
UPS
Utility/
Mains
breaker
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