ABB Conceptpower DPA 500 - Page 50

Modifications reserved
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When the UPS is operating in Eco mode, the efficiency of the system is higher (99%). In the event of a
mains failure the load will automatically be transferred from mains to inverter within 5 ms (this is valid
for single and parallel systems). The battery charger remains active in Eco mode.
Operating in Eco mode is recommended only if the load can tolerate interruptions of 3-5 ms (transfer
time from Eco mode to Online mode).
NOTE
TO HAVE THE MOST ESSENTIAL SECURITY LEVEL, WE RECOMMEND TO
RUN THE UPS ON ONLINE OPERATION MODE
6.4.8.4 Maintenance bypass mode
Before transferring the load to maintenance bypass (IA1) always check that all the UPS-modules
are in Eco-Mode (Bypass-Mode).
The Maintenance Bypass mode is performed using the
IA1 bypass switch
in the front of the UPS:
Switch
Position
Effect
Status
ON
Maintenance bypass switch closed:
(Load supplied directly from mains)
Warning symbol indicates in the display:
“Manual bypass is closed”
OFF
Maintenance bypass switch open:
Normal operating condition (Load
supplied by inverter)
Warning symbol indicates in the display:
“Manual bypass is opened”
NOTE
ON MANUAL OR MAINTANENCE BYPASS MODE, THE LOAD IS NOT
PROTECTED AGAINST ANY MAINS FAILURES OR MAINS DISTURBANCES