Emerson Liebert ITA User Manual page 24

16 Chapter 2 Single UPS Installation And Commissioning
2. Self-distribution
The I/O cable connection procedures of the self-distribution for the four types are as follows:
 3-in 3-out, common source configuration (factory default)
1. Remove the protective cover A of the I/O terminal block.
2. Remove the plates on six cable entry holes of the protective cover B according to the cable direction.
3. 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.
4. Connect the live lines (input phase A, input phase B and input phase C), N line and PE line respectively to the I/O
terminal block (mA, mB, mC, mN and PE terminals) of the UPS. Short connect mA and bA, mB and bB, mC and bC,
mN and bN of the I/O terminal block of the UPS using the copper shorting bar 3 respectively.
5. Connect the live lines (output phase A, output phase B and output phase C), N line and PE line respectively to the
I/O terminal block (oA, oB, oC, oN and PE terminals) of the UPS, as shown in Figure 2-16.
6. Install the protective cover B of the I/O terminal block.
UPS
 3-in 3-out, split-bypass configuration
1. Remove the protective cover A of the I/O terminal block.
2. Remove the plates on six cable entry holes of the protective cover B according to the cable direction.
3. 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.
4. Remove all the copper shorting bars 3 from the I/O terminal block of the UPS.
5. Connect the live lines (main input phase A, main input phase B and main input phase C), N line and PE line
respectively to the I/O terminal block (mA, mB, mC, mN and PE terminals) of the UPS.
6. Connect the live lines (bypass input phase A, bypass input phase B and bypass input phase C) and N line
respectively to the I/O terminal block (bA, bB, bC and bN terminals) of the UPS.
7. Connect the live lines (output phase A, output phase B and output phase C), N line and PE line respectively to the
I/O terminal block (oA, oB, oC, oN and PE terminals) of the UPS, as shown in Figure 2-17.
8. Install the protective cover B of the I/O terminal block.
UPS
UPS output
N A B
oN oN
Figure 2-16 3-in 3-out, common source configuration cable connection
UPS output
N A B C
oN oN oA oB oC
Figure 2-17 3-in 3-out, split-bypass configuration cable connection
Liebert ITA 16kVA And 20kVA UPS User Manual
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C PE
PE
oA oB oC PE PE mN
PE
PE
mN
PE PE
Main input
N A B C
3 3 3 3
bN mA bA mB bB mC bC
Main input / Bypass input
mN mA mB mC
bN bA bB bC
bN mA bA mB bB mC bC