OPM_LPS_31E_8K0_20K_1GB_V010.doc 9/40 Operating Manual LP 31 / 8-10-15-20 kVA
2.3 MAINS FAILURE
In the event of a mains power failure (i.e. absent or outside tolerance) the system uses the
energy reserve stored in the battery to continue to produce AC power, ensuring unbroken
output (fig. 2). No interruption or alteration will ever be noticed in the output power.
In the event of an extended mains failure, the output converter will stop when the battery
energy has been used up.
At this point, the UPS is no longer able to power the connected equipment.
When the mains is re-established within tolerance, the output converter will be supplied again
by the input converter and the batteries will be recharged, making them ready to support future
power.
Figure 2 - Block diagram, mains failure
2.4 AUTONOMY TIME
The autonomy time, the time the output converter can operate on battery, depends on the
capacity of the battery and on the power demand of the equipment supplied by the
LP 31
UPS
.
Estimates of run-times are given.
LOAD
LP 31
8 kVA
LP 31
10 kVA
LP 31
15 kVA
LP 31
20 kVA
25 % 75 minutes 51 minutes 80 minutes 56 minutes
50 % 35 minutes 24 minutes 30 minutes 24 minutes
100 % 14 minutes 10 minutes 13 minutes 10 minutes
Units connected to battery cabinets will have longer autonomy times.
See section 6 - Options.
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