Electrical Connection; Backfeed Protection - Legrand Keor Dk Rack Manuel D'installation Et D'entretien

If both the additional distribution box and battery cabinet are present, the installation order from
bottom to top is: battery cabinet, additional distribution box, UPS.

4.3 Electrical connection

4.3.1 Backfeed protection

When the Keor DK Rack UPS is installed with the additional distribution box 3 113 74, the backfeed
protection is integrated in this accessory, as shown in the picture:
ADDITIONAL DISTRIBUTION BOX 3 113 74
Distribution module
Contactor
L3
L2
L1
N
Coil
PE
Contactor
L3
L2
L1
N
Coil
PE
L3
L2
L1
N
PE
UPS
L3
L2
L1
N
PE
11