Normal Conditions; Mains Failure - GE Digital Energy LP 31 Series Product Description

2.2 Normal Conditions

Under normal input conditions (see section 4.2) energy from the mains is channelled through the input
converter, which supplies the output converter and, together with the battery charger, keeps the
battery fully charged.
Surges and spikes are blocked completely at the input converter and very unstable mains can be
supported.
The output converter synthesises a completely new AC output sine wave to supply the load (electrical
equipment).

2.3 Mains Failure

In the event of a mains power failure (i.e. absent or outside tolerance) the output converter uses the
energy reserve stored in the battery to continue to produce AC power, ensuring unbroken output
Figure 2 - Block diagram of the LP 31 Series / 8-10-15-20 kVA UPS, mains failure
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
failures.
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PRD_LPS_31E_8K0_20K_1GB_V021.doc Product Description LP 31 Series