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PowerWAVE 9000 DPA UPS - Operation
(Issue 2.1 Oct. 2009)
IF THE UPS IS OPERATING IN THE MAINTENANCE BYPASS MODE
THROUGH THE BYPASS SWITCH THE LOAD WILL NOT BE
PROTECTED IN THE EVENT OF A MAINS FAILURE. IT IS THEREFORE
STRONGLY RECOMMENDED TO SWITCH OVER TO THE ON-LINE
MODE (INV. ON) OR BYPASS MODE (ECO MODE) AS SOON AS
POSSIBLE.
4.4.4 Parallel Isolator (IA2)
Every UPS-unit (module) is provided with an output parallel isolator (IA2)
which, when opened isolates the corresponding unit (module) from the
PARALLEL BUS and from the LOAD. Once IA2 is open there is no power
coming from its inverter.
In redundant parallel configurations it is used to isolate a unit from the
parallel system without the need of transferring the load to bypass.
4.5 Start-Up
Procedure
ALL THE OPERATIONS IN THIS SECTION MUST BE PERFORMED BY
AUTHORISED ELECTRICIANS OR BY QUALIFIED INTERNAL
PERSONNEL.
THE UPS MUST NOT BE STARTED OR PUT INTO USE WITHOUT
HAVING FIRST BEEN COMMISSIONED BY A FULLY TRAINED AND
AUTHORISED PERSON.
4.5.1 Prestart Checks:
1.
The fuses for the supply of UPS-System in the Input
Distribution Board on site are open.
2.
Make sure all the input and output cabling has been performed
correctly and check the input phase rotation.
3.
Verify that all Parallel Isolator Switches IA2-1, IA2-2 and IA2-
3 are open (Position OFF).
4.
Verify that the Maintenance Bypass Switch IA1 is open and in
Position OFF.
POSITION
EFFECT
ON
Normal Operation (Load supplied by UPS)
OFF
UPS-Module isolated from Parallel Bus for maintenance or mod-
ule replacement (UPS-Module not supplying load)
