GE Industrial Solutions LP 33U Series 10 & 20 kVA Installation Guide - Manual (Page 32)

Modifications reserved Page 32/40
OPM_LPS_3UI_10K_20K_1US_V010.doc Installation Guide LP 33U Series 10 & 20 kVA / S1
3.9.6 UPS FUNCTIONING as FREQUENCY CONVERTER
When the UPS LP 33U Series 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 P1 – 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 follows the standard procedure described in Section 3.9.1.
Notices for start up procedures:
•
Follow the standard procedure indicated in Operating Manual.
Notices for shutdown procedures:
•
Follow the standard procedure indicated in Operating Manual.
NOTE !
The inverter can be turned off only by pressing the “Total Off” key.