Liebert UHA1R-0100 User Manual page 25

After the cable connection, install the protective cover B of the I/O terminal block to protect the I/O terminal block. The
protective cover B of the I/O terminal block is shown in Figure 2-17.
Cable entry hole
(6 pcs,with plate )
Before installing the protective cover B of the I/O terminal block, remove the iron plates on the cable entry holes, and
install the bushings (label: 21101494, accessories). After the cable connection, fix the protective cover B of the I/O
terminal block.
According to user's requirements, the I/O cable connections are divided into four types: 1-input 1-output, common
source configuration (factory default); 1-input 1-output, split-bypass configuration; 3-input 1-output, common source
configuration; 3-input 1-output, split-bypass configuration.
The I/O cable connection procedures for the four types are described in the following.
 1-input 1-output, common source configuration (factory default)
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 2-18.
6. 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 2-18.
7. Install the protective cover B of the I/O terminal block, and then restore the protective cover of the bypass terminal
block.
Chapter 2 Single UPS Installation And Commissioning
U
Input live line
V
W
Input neutral line
N
Three-pole or quadrupole
linkage breaker
E
Figure 2-16 Correct power distribution method
Figure 2-17 Protective cover B of the I/O terminal block
Liebert ITA 10kVA UPS User Manual
®
Output live line
U
Load
P
Output neutral
S line
17