Chapter 2 Single UPS Installation And Commissioning 15
Liebert
®
ITA 16kVA And 20kVA UPS User Manual
Figure 2-13 Protective cover A of the I/O terminal block
Figure 2-14 gives the terminal layout of the I/O terminal block.
3
3
3
3
oN oA oB oC
Bat +
Bat N
Bat -
PE mN bN mA bAmB bBmCbC
Note:
1. Main input: mA, mB, mC, mN; Bypass input: bA, bB, bC, bN; Output: oA, oB, oC, oN;
Battery: Bat +, Bat N, Bat -; Grounding: PE.
2. In factory, four copper shorting bars 3 have been used to short terminals between mA
and bA, mB and bB, mC and bC, mN and bN respectively.
Figure 2-14 Terminals layout of the I/O terminal block
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 2-15.
Cable entry hole
(with plate, 12 pcs)
Figure 2-15 Protective cover B of the I/O terminal block
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.
Power distribution mode
There are two modes for UPS power distribution: using the single power output distribution unit (POD, optional)
provided by Emerson, self-distribution.
According to user’s requirements, the I/O cable connections are divided into four types: 3-in 3-out, common source
configuration (factory default), 3-in 3-out, split-bypass configuration, 3-in 1-out, common source configuration, 3-in
1-out, split-bypass configuration.
1. Using single POD power distribution
For the single POD installation and power distribution, refer to
Liebert
®
ITA 16kVA And 20kVA UPS Power Output
Distribution Unit User Manual
.
