TERRA DC WALLBOX
2020-12
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3.2
Electrical requirements
CAUTION
The installation company is responsible to design and install the electrical
installation according to the local regulations.
3.2.1
Required electrical grid configuration
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 (3
ø
, 480Y/277V input)
3-phase
480Y/277V
Terra DC
Wallbox
Neutral
Grounding
Electrode
Conductor
277V
480V
Line 1
Line 2
Line 3
Neutral
Ground
Line 1
Line 2
Line 3
40A fused
switch or
circuit breaker
