Single upm shutdown, Restarting a single upm, Parallel system and critical load shutdown – Powerware 9390 UPS 100160 kVA User Manual
Page 117
UPS OPERATING INSTRUCTIONS
EATON Powerware
®
9390 UPS (20–80 kVA) Installation and Operation Manual
S 164201603 Rev 2 www.powerware.com
9-9
9.2.4
Transfer Parallel System from Bypass to Normal Mode
To transfer the critical load to Normal mode:
1.
Press the CONTROLS pushbutton on the main menu bar on any UPM. The
System Control screen appears.
2.
Press the NORMAL pushbutton on the System Controls menu bar of any UPM.
The UPMs transfer to Normal mode. If the power processor is not available, the
system remains on bypass and an alarm sounds.
3.
The UPMs are now operating in Normal mode, and the NORMAL status indicator
on each UPM is illuminated.
The power module (PM) status indicates ONLINE on each UPM.
9.2.5
Single UPM Shutdown
To shut down a single UPM:
NOTE The UPM can be shut down only if remaining UPMs can support the critical load without being
overloaded.
1.
Press the CONTROLS pushbutton on the main menu bar on the UPM to be shut
down. The System Controls screen appears.
2.
Press the pushbutton to display System Controls Screen 2.
3.
Press the PM OFF pushbutton on the System Controls menu bar.
The power module (PM) status indicates SHUTDOWN. The input and output
contactors open, the battery breaker or disconnect is tripped, and the power
module is turned off.
4.
Open the input and bypass (if dual feed) feeder circuit breakers supplying the
shutdown UPM.
NOTE The monitor screen continues to be active until the UPM is isolated from the critical bus.
W
A
R
N
I
N
G
Power is present inside the shutdown UPM cabinet due to connection to the critical bus, until the UPM
output breaker is opened.
5.
If it is necessary to isolate the UPM from the critical bus, open the module
output breaker on the tie cabinet or distribution panel.
9.2.6
Restarting a Single UPM
To restart a single UPM:
1.
If the UPM was isolated from the critical bus, close the module output breaker
on the tie cabinet or distribution panel.
2.
Observe the UPM control panel display becoming active, indicating logic power.
UPM logic is being powered from the critical bus.