Electrical Requirements; Required Electrical Grid Configuration - ABB Terra DC Wallbox Installation Manual

3.2

Electrical requirements

3.2.1
The DC Wallbox may be ordered with either a 1-phase or 3-phase input variant. It is essential that the DC Wall-
box is installed in the proper electrical grid configuration. The allowable grid configurations are shown in the
three figures below. Please observe the 3-phase variant DC Wallbox supports only one grid configuration and
the 1-phase variant DC Wallbox supports two different grid configurations. For the 1-phase variant DC Wallbox,
ABB recommends the electrical designer to consider power distribution phase balancing design requirements.
Electrical grid configuration required for 3-phase, DC Wallbox UL variant (3ø, 480Y/277V input)
2 0 2 0 - 1 2
CAUTION
The installation company is responsible to design and install the electrical
installation according to the local regulations.

Required electrical grid configuration

Line 1
480V
Line 2
277V
Neutral
Line 3
Grounding
Electrode
Conductor
40A fused
switch or
circuit breaker
Line 1
Line 2
Line 3
Neutral
Ground
TE R R A D C WA LL B OX
3-phase
480Y/277V
Terra DC
Wallbox
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