Liebert UPS System - Manual (Page 44)

Chapter 4 Commissioning of UPS
38
Step 5 : After the UPS transfers from bypass to inverter, the bypass indicator turns
off, and the inverter and the load indicator turns on. The transfer may fail if the
phase rotation of bypass and inverter output are different.
During operation, if the AC power recovers after failure, the rectifier will restart
automatically after some time. If the UPS transfer to generator power, the
monitoring system will determine the quality of the generator supply. The time it
takes to determine this, ranges from 1 second to 255 seconds.
After startup, use the keypad to set the functions of the UPS.
Note
Power failure means the line to neutral voltage is lower than 120V or the Line to
Line voltage is lower than 208V over 10 msecs.
4.2 Setting the functions
The methods of setting the functions will be described in details in Chapter 5.
This chapter only introduces the setting that relates to commissioning.
The user enters the menu of “set functions” shown in the figure below.
2001-11-08 UL33-0400L 12:50:30
Inv. On Units 2/4 ID: 1
Input Breaker Closed 11£ -08 12:09
UPS in Battery Mode
Battery low
11£ -08 12:09
11£ -08 12:28
11£ -08 12:28
11£ -08 12:50
Records
Out
System
Local
Settings
Byp. Breaker Closed
Mains Volt. Abnormal
Battery
Chinese
Chinese English
Com. Adress Set 1
1
Date & Time Set
2001£ -11£ -08 12:50:30
Language
Fig. 4-1 Function Setup Menu
Language selection : select “Chinese” or “English” as shown in Figure 4-3
Address setup : set the address of this UPS in the monitoring system as shown in
Figure 4-3.
Date and Time setup : format is “YYYY-MM-DD” and “HH:MM:SS” as shown in
Figure 4-3