Liebert 7200 Series - Installation procedure (Common battery); Connection between UPS and “battery auxiliary distribution box”

7200 Series UPS User Manual Chapter 7 - 1+1 Parallel System
Single Module and 1+1 Parallel System Installation procedure (Common battery)
document in response to "powersure ups"
Page 7-9
Issue 6
(03/98)
7.4 Installation procedure (Common battery)
WARNING
If residual current circuit-breakers are used on the incoming side of the UPS modules, make sure to use a
common sensor for both rectifier incoming lines. At the instant of electrical connection, the current may not be
split instantaneously and this may cause the residual current circuit-breakers to trip separately.
Refer to the general diagram shown in figure 7-2.
In addition to the information described in paragraph 7.2, the 1+1 system with common batteries also
uses the ”battery auxiliary distribution box”. This box uses two isolators to connect the battery to the
two UPS modules, and thus individually isolate the two modules from the system.
The box is also designed to supply the two UPS modules with a battery current measurement (charge or
discharge).
Follow the instructions provided below to connect this option.
Use part no. 4641031 F (125 A) with the 30 kVA UPS.
Use part no. 4641032 G (250 A) with the 40 and 60 kVA UPS.
7.4.1 Connection between UPS and “battery auxiliary distribution box”
Refer to the diagram shown in figure 7-6 and the attached table.
1. POWER CABLES:
For the connection between the UPS modules and the auxiliary box use cables with the section
indicated in paragraph 3.3.2.
For the connection between the auxiliary box and the battery use 2 cables in parallel (for each of the
2 polarities) which have the section indicated in paragraph 3.3.2.
2. AUXILIARY CABLES:
Use multiple-core shielded cables with a section of 0.5 mm
2
. Connect the cables with the Fast-on
6.3x0.6 mm terminals contained in a bag inside the “auxiliary battery distribution box”.
The battery current transformer “T11”, mounted next to the battery fuse, inside the two UPS modules,
must be disconnected and removed. The cables, disconnected from the UPS wiring, must be re-
connected to cable “D1” or “D2” as illustrated in figure 7-6.
The temperature sensor, contained in a bag inside the battery auxiliary distributio box, must be mounted
in the battery cabinet next to the sensor which was previously installed, and connected to the auxiliary
box through cable “B” as illustrated in figure 7-6.