Mains Failure; Autonomy Time - GE LP 31 Operating Manual

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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.

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
25 %
50 %
100 %
Units connected to battery cabinets will have longer autonomy times.
See section 6 - Options.
OPM_LPS_31E_8K0_20K_1GB_V010.doc
Figure 2 - Block diagram, mains failure
LP 31 LP 31
8 kVA 10 kVA
75 minutes 51 minutes
35 minutes 24 minutes
14 minutes 10 minutes
9/40
LP 31 LP 31
15 kVA 20 kVA
80 minutes 56 minutes
30 minutes 24 minutes
13 minutes 10 minutes
Operating Manual LP 31 / 8-10-15-20 kVA
GE