Liebert UPS System User Manual page 71

Chapter 5 Operation of Display Panel
UL33-0400L
Inv. On
Mains
Bypass
Out
Local
System
Battery
Input Breaker Close
Byp. Breaker Close
Output Breaker Open
UPS in Normal Mode
Batt. Boost Charging
Start UPS capacity inadequate: When the UPS is in bypass mode, if the load
capacity is larger than that of one or more than one UPS unit, the UPS that has
already been start-up will not transfer to inverter mode and prompt a window to ask
the user to confirm.
When the load is reduced to be lower than the capacity of UPS, the Prompt window
will disappear.
UL33-0400L
Inv. On
Mains
Bypass
Out
Local
System
Battery
Input Breaker Close
Byp. Breaker Close
Output Breaker Open
UPS in Normal Mode
Batt. Boost Charging
Load capacity higher than that of single module UPS system: If the UPS is in
bypass operation mode, and the load capacity exceeds the total capacity of one or
more than one UPS units, the LCD of the UPS that start first will display a Prompt
window, as shown in Fig. 5-44. Under this condition, the user must decrease the
load until the load is lower than the UPS capacity, or switch on the remained UPS
until the total capacity exceeds the load capacity, thus the system can transfer to
inverter mode and the Prompt window disappears.
2001-11-08
Units:
A(B) B(C) C(A)
Power KW 220
221
11.8 12.3
Cap. KVA
This operation leads
to overload, Confirm
Load%
50.2 50.1 50.1
or cancel
1.41 1.40 1.41
Crestor
Factor
11£ - 0 8 12:09
11£ - 0 8 12:09
11£ - 0 8 12:09
11£ - 0 8 12:09
11£ - 0 8 12:09
Fig. 5-42 Capacity expansion
2001-11-08
Units:
B(C) C(A)
A(B)
Power KW 220
221
12.3
11.8
Cap. KVA System overload,
Turn on More UPS
Load%
50.2 50.1 50.1
1.41 1.40 1.41
Crestor
Factor
11£ - 0 8 12:09
11£ - 0 8 12:09
11£ - 0 8 12:09
11£ - 0 8 12:09
11£ - 0 8 12:09
Fig. 5-43 UPS capacity inadequate
65
12:30:20
ID 1
221
C
12.5
OK
12:30:20
ID 1
221
12.5