Chapter 2 Single UPS Installation And Commissioning 15
Liebert
®
ITA 10kVA UPS User Manual
UPS
Battery module
Figure 2-13 Installing UPS with battery modules
2.5 Connecting Power Cables
The I/O cables, battery cables and 10A charger cables (optional) are required for connection. When connecting the
cables, you should follow the local wiring regulations, take the environment situation into account, and refer to Table
3B of IEC60950-1.
The maximum current in different operating modes is listed in Table 2-2, the recommended minimum cable CSA is
listed in Table 2-3. Select the appropriate cables according to Table 2-2 and Table 2-3.
Table 2-2 Max. steady state AC and DC current
Model
Rated current (A)
Mains input current
1
、
2
upon battery
charging with max. ability
Total output current
2
at full load
Battery discharging current
upon min. battery voltage
220V
230V
240V
220V
230V
240V
10kVA (1-input 1-output)
55
55
55
46
44
42
64
10kVA (3-input 1-output)
19
19
19
46
44
42
64
Note:
When the battery cables are selected, according to the current value shown in this table, the max. allowable voltage drop is 4Vdc.
Do not ring the cables to avoid increasing the electromagnetic interference.
1: The input mains current of the rectifier and the bypass.
2: Non-linear load (switch mode power) affects the neutral cable design of the output and the bypass. The neutral cable current
may exceed the rated phase current, up to1.732 times as large as the rated current
Table 2-3 Single UPS cable CSA (unit: mm
2
, ambient temperature: 25°C
）
Model
Input
Output
Neutral cable
PE
Battery
10kVA (1-input 1-output)
10
10
10
10
16
10kVA (3-input 1-output)
10
10
10
10
16
The recommended I/O MCB capability of the UPS is listed in Table 2-4. Select the MCBs according to your
requirements.
Table 2-4 UPS I/O MCB selection
Model
Input interface
Recommended
capability of input
external MCB
Battery MCB
Output interface
Recommended
capability of output
external MCB
10kVA (1-input 1-output)
Terminal block
125A
DC63A
Terminal block
70A
10kVA (3-input 1-output)
Terminal block
125A
DC63A
Terminal block
70A
