Connecting Battery Cables - Emerson Liebert ITA User Manual

20 Chapter 2 Single UPS Installation And Commissioning

2.5.2 Connecting Battery Cables

Notes
1. If the battery module is not configured, this product needs to be equipped with positive and negative batteries.
Each battery string ranges from 15-cell to 20-cell, and 12V for each cell.
2. Before connecting the battery cables, confirm that the actual battery cell number and capacity are consistent with
the parameter settings on the LCD menus.
3. It is prohibited to reverse the polarity of the battery cables.
4. Before replacing the battery module and connecting the battery cables, disconnect the DC battery MCB, power off
the UPS completely, and conduct isolation protection on the terminals.
5. Refer to Figure 2-25 and Figure 2-26 for the length of the battery cables. If you need longer cables, please consult
the dealer. It is recommended that the battery cable should not be longer than three meters. Otherwise, the UPS
cannot operate normally.
Installing battery
1. Before installation, you must inspect the appearance and accessories of the battery, and carefully read this manual
and the user manual provided by the battery manufactory.
2. Maintain at least 10mm clearances between the front, rear, side panels of the battery and the wall or adjacent
equipment to keep well-ventilated.
3. Maintain some clearances between the top of the battery and the upper baffle to facilitate monitoring and
maintenance of the battery.
4. Install the batteries from the bottom to the top to prevent too high center of gravity. Place the battery well to avoid
shake and impact.
Connecting external battery string
The default battery number of the UPS is 32-cell, including 16-cell positive batteries and 16-cell negative batteries.
The external battery string connection principle diagrams of the self-distribution are shown in Figure 2-23 and
Figure 2-24.
1. As shown in Figure 2-23 and Figure 2-24, one DC battery MCB must be added between the battery strings and the UPS.
2. The voltage of the battery string is DC high voltage, the capacity of the MCB and output cables is listed in Table 2-4.
First cell
＋
First cell
＋
Second cell
＋
－ －
Second cell
＋
－ －
Figure 2-23 Battery string connection principle diagram 1
Liebert ITA 16kVA And 20kVA UPS User Manual
®
Warning
Third cell Sixteenth cell
＋ ＋
......
－
Third cell Sixteenth cell
＋ ＋
......
－
Bat +
－
Bat N
UPS
－
Bat -