Chapter 4 : Central bypass systems
UPS/NTA GB/ DELMX_EXPC1C3C6.B
page 30
11.5.Load transfer from mains to inverter
In the central bypass cabinet :
The load transfer from mains to inverter can be achieved in the menu "UPS Commands / load
to inverter".
Title screen / UPS commands / load to inverter
UPS COMMAND : LOAD TO INVERTER
CONFIRM TRANSFER TO INVERTER
Cancel validate
'ESC' 'ENTER'
11.6. UPS shutdown with switching to the maintenance bypass
In the central bypass cabinet :
The transfer of the system to maintenance bypass should be carried out as follows :
- request a load transfer to maintenance bypass in the menu " UPS commands / Transfer to
maintenance bypass". This menu is run through an interactive procedure. Just follow the
instructions displayed and validate when "ENTER" is displayed.
In each unit :
- follow the instructions given on the control panel of the unit.
- shutdown the rectifier.
Note : at this stage the load is supplied by the maintenance bypass (no protection) and the units
are stopped.
