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 particular 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.
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