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Centric 3x480 Vac, Installation Guide, rel. 2.2
24
4.3.4.4
ASSEMBLING AND CONNECTING THE BATTERIES
Note: The Centric supports the use of standard lead-acid batteries, and also lithium-ion batteries. If you
plan to use lithium-ion batteries, consult with your Centric dealer to be sure that the battery setup
parameter values are appropriate for the batteries you will be using.
1.
It is recommended that the battery cabinet(s) be located as close to the UPS as is practical.
2.
Assemble the batteries within the battery cabinet.
3.
Figure 15 shows the recommended connection to the UPS, which includes two fuses inside of each
battery cabinet, one on the plus line and one on the minus line. The recommended fuse values for
one set of two cabinets of 20 x 12 Vdc each are shown in Figure 15, according to the output capacity
of the UPS.
4.
Figure 15 assumes that the battery fuses can be easily disconnected when desired.
5.
Measure the dc voltage at the main terminals of the battery cabinets. Verify that you obtain values of
at least 240 Vdc for each battery cabinet, or at least 480 Vdc across the main battery CB.
6.
Connect the battery set to the Centric’s positive (“+”) battery bus bar, negative (“–“) battery bus bar,
and Neutral bus bar. Refer to Figure 15 and Table 7.
Observe proper polarity!
7.
The fuses between the battery cabinets and the Centric (F1, F2, F3, and F4 in Figure 15 must be
FAST FUSES (SEMICONDUCTOR FUSES)
; for example, the Ferraz Shawmut A70QS fuse.
8.
For initial startup to take place the battery must be connected to the UPS and available.
Figure 15: Connecting the battery to the UPS
Note: Fuse values in Table 7 are for fuses F1 through F4 in Figure 15 and Figure 16, and are
based on 10-minute backup time at full load. If longer backup time is needed, please
consult with your dealer.
Table 7: Suggested fuse and circuit-breaker values
UPS capacity (kW)
30
60
90
120
150
180
210
240
Max. current (A)
80
160
240
320
400
480
560
620
Fast fuse (A)
60
125
200
250
300
400
450
500
Circuit breaker (A)
63-125
125-180 200-250 300-350 350-450 450-525 500-600 550-650
