LEGRAND Daker DK 4.5-6 kVA Parallel Installation Quick Start page 6

Recommended Circuit Breakers to be installed at the UPS input/output
MODEL
4,5-6KVA
10KVA
The breaker type should be "C" or "D" with the following current ratings:
• Install and connect the UPS units according to the diagrams in figure 2, 3, 4, 5.
CAUTION
The MTBS is an optional for maintenance.
Figure 1
CBi : installation input breakers
CBo : installation output breakers
CB1 : UPS utility input breaker
6
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INPUT (CBi)
2 Parallel system installation
40A
63A
OUTPUT (CBo)
30A
63A
Utility input
UPS output