UPS for 400 Vac Grid, Installation Guide, doc. rel. 3.0
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Figure 13: Connecting multiple battery sets, using CBs
Figure 13 shows how two battery sets can be connected to the UPS. This example includes two
circuit breakers (DC SW #1 and #2), one for each battery pole.
Fuses F5 and F6 in Figure 13 have the same values as those specified in Figure 12.
The rating in Figure 13 of Fuses F1 through F4, and of DC SW #1 and #2 (for each battery set
Figure 12), depends on the number of battery sets. The greater the number of battery sets, the
lower the rating required for fuses F1 through F4. Fuses F5 and F6 and DC SW# 1 and #2 (Figure
13) must be rated according to the DC current rating of the system to safely disconnect the
batteries.
Protect the batteries from moisture, dampness, and foreign substances.
The temperature of the battery's surroundings influences the batteries' useful lifetime.