Electrical Connection - Preliminary Operations; Ac Low Voltage Network Configuration; External Ac Input Protections - ABB Terra 94 UL Operation And Installation Manual

Electrical connection
7.1

Electrical connection - preliminary operations

7.1.1

AC low voltage network configuration

The following WYE network configuration is allowed for the AC connection of the EVSE:
Source
Earthing at the source
• Wire L1, L2, L3
• Wire PE to the charger earthing bar without interruption
NOTE
The EVSE must be wired with a WYE input. The neutral (N) connection is not required.
7.1.2

External AC input protections

General schematic to identify the position of AC protection devices.
A
Parameter Description
A Medium voltage network
B Medium voltage breaker
C Medium voltage/Low voltage transformer
Low voltage protection devices:
- Overcurrent protection
- Surge Protection Device (SPD) Type 1
D
E EVSE
480 V
277 V
N
B
This information does not supersede any legal regulations. The installer engineer
should be aware that local regulations may impose requirements not reflected in
this document. The most stringent requirements shall be applied.
EVSE
L1
L2
L3
PE
C D
53
E