System Grounding - Alpha ESS PWG2-50K User Manual

14 Chapter IV Device Installation
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System grounding

4.6.4
The modules in Bi-directional Hybrid Storage Inverter realize grounding connection with the cabinet through
hangers.
As for cabinet grounding, the cabinet bottom is installed with grounded cooper bars. During wiring, refer to the
following table for cable diameter. The grounding resistance should be less than 4Ω.
Rated power
50K
100K
Fig. 4-6 PWG2-50K cabinet wiring copper bars
Fig. 4-7 PWG2-100K cabinet wiring copper bars
PE line section
recommendation (mm²)
≥16
≥25
6
7
8
9
Note: The bolt is M8 with a
hole diameter of 8mm.
Position
1
2
3
8
4
7
5
6
9
6
7
8
9
Note: The bolt is M8 with a
hole diameter of 8mm.
Warning
AC output A phase
AC output B phase
AC output C phase
bar
N
Description
PV DC input
positive pole
PV DC input
negative pole
Battery input
positive pole
Battery input
negative pole
PE
AC output A phase
AC output B phase
AC output C phase
bar
N