Critical Power
Modifications reserved
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GE_UPS_ISG_LPS_3UL_20K_30K_2US_V010.docx
Installation Guide
LP33 Series 20 & 30 UL S2
4.9.5
UPS functioning as frequency converter
NOTE !
The set-up for
LP33 Series 20 & 30
when functioning as frequency converter requires
a partic
ular installation and adequate setting of some parameters (accessible
only through password), and can therefore only be done by a
GE QUALIFIED
SERVICE ENGINEER
.
The
LP33 Series 20 & 30
can run as frequency converter only with a connected
battery, as a standard UPS.
When the UPS
LP33 Series 20 & 30
is delivered as frequency converter (different output frequency with
respect to the input frequency),
the automatic bypass and manual bypass functions are disabled
.
Therefore the
load
cannot be transferred to mains in case of overload, short circuit, or inverter failure.
In cases where the UPS needs to be powered down for maintenance purposes, the critical load must
also be powered down during this time.
When the set-up parameters of the UPS are set for
frequency converter
, the
ECO Mode
operation is
automatically disabled.
The UPS delivered as
frequency converter
has the following differences:
Automatic
bypass disabled
by setting of dedicated parameter (access protected by password
reserved to service engineer).
The handle of the switch
Q2 - manual bypass
is removed to avoid accidental wrong manipulations.
Mains bypass
disabled by removing the fuse
F3
fitted on the board
P2 – Power Supply
.
WARNING !
In case a UPS delivered as frequency converter should be set on site for UPS
standard version, the operation must be performed by a QUALIFIED SERVICE
ENGINEER.
Notices for installation:
For UPS with
common AC input
follow the standard procedure described in
Section 4.9.1
.
Notices for start-up procedures:
Follow the standard procedure indicated in
User Manual
.
Notices for shut-down procedures:
Follow the standard procedure indicated in
User Manual
.
NOTE !
The inverter can be turned off only by pressing the
“Load Off”
key.