80 kVA - 130 kVA UPS
User’s and Installation Manual
1017397
Revision D (update)
32
Going to the UPS mode
Before turning the maintenance bypass switch from bypass to UPS position, verify that
the bypass LED is lit
. Verify that the UPS returns to Normal mode. It may be
necessary to transfer the UPS to normal mode by pressing the Normal pushbutton in
System Control menu.
If the rectifier input voltage is not present or within limits, the UPS will stay on bypass
mode as long as the bypass input voltage is within limits. If the bypass goes out of
limits or the rectifier input voltage returns within limits, the unit will transfer to normal
mode.
7.5 Starting up the UPS
Make sure that UPS installation has been carried out correctly and battery line, neutral
and protective earth inputs have been connected. Figures 7 and 8a show the location of
the switches and breakers.
The UPS is also provided with a battery start up possibility. When the following start-
ups are done, the UPS will also start up if the input power line is not available or
acceptable. In this case the UPS will be in battery mode supplying power from the
batteries or in the static bypass mode if the bypass line voltage and frequency are
acceptable. During the battery start-up the UPS won’t transfer to normal mode if the
bypass is within limits. The UPS will transfer to normal mode when the rectifier input
voltage returns within limits or bypass voltage is no longer acceptable.
During battery start up UPS will charge the DC link capacitors from batteries and this
causes longer start-up time.
Starting up the UPS, load energized
(bypass switch S2 is in bypass position and voltage is present in the output
terminals, see figure 8a)
•
Open the doors of the UPS
•
Check that on/off switch S1 is in OFF position
•
Check that the maintenance bypass switch S2 is in bypass position
•
Turn the circuit breakers F1 (IGBT models) and F2 to ON position
•
Close the right door
•
Start the UPS by turning the switch S1 to ON position
The UPS will now check it’s internal functions. The UPS starts after 10 – 15 s.
( Approx. 1 min. if the rectifier input voltage is not present)
•
Check that the yellow bypass LED is lit
.
•
Check that there is no active alarms that require immediate action.
•
Turn the maintenance bypass switch S2 to UPS position
•
Close the left door of UPS
