Liebert UHA1R-0100 User Manual page 26

18 Chapter 2 Single UPS Installation And Commissioning
 1-input 1-output, split-bypass configuration
1. Make sure that all the external I/O MCBs of the UPS are open.
2. Remove the protective cover of the bypass terminal block, and then remove the protective cover A of the I/O
terminal block.
3. Remove the plates on three cable entry holes of the protective cover B according to the cable direction.
4. Pass all the cables to be connected to the I/O terminal block through the cable entry holes of the protective cover B
according to the actual situation.
5. Connect the main input N line, L line and PE line respectively to the input neutral line terminal (N), input live line
terminal (U), input earth line terminal (PE) of the UPS I/O terminal block, and tighten the fixing screws, as shown in
Figure 2-19.
6. Remove the shorting cable (cable number: W09, see Figure 2-18), connect the input bypass line to the BYPASS
terminal of the bypass terminal block, and tighten the fixing screws, as shown in Figure 2-19.
7. Connect the output L line, N line and PE line respectively to the output live line terminal (L), output neutral line
terminal (N) and output earth line terminal (PE) of the UPS I/O terminal block, and tighten the fixing screws, as shown
in Figure 2-19.
8. Install the protective cover B of the I/O terminal block, and then restore the protective cover of the bypass terminal
block.
For split-bypass configuration, an upstream MCB (125A MCB is recommended) must be used at the bypass input end.
 3-input 1-output, common source configuration
The factory default power distribution mode of the UPS is 1-input 1-output. If you need to change the power distribution mode of
the main UPS to 3-input 1-output, conduct the steps described in the following to change the power distribution mode to 3-input
1-output, and then continue the installation and commissioning.
Figure 2-18 Cable connection for 1-input 1-output, common source configuration
Figure 2-19 Cable connection for 1-input 1-output, split-bypass configuration
Liebert ITA 10kVA UPS User Manual
®
Shorting cable
(cable number: W09)
N L
Input
Input bypass
N L
Input
警告 危 险
Note
警告 危 险
Warning
Shorting cable
(cable number: W10)
PE PE L N
Output
Shorting cable
(cable number: W10)
PE PE L N
Output