Connecting The Ac Grid And Grounding To The Connection Unit; Grounding - SolarEdge SE50K Installation Manual

NOTE
Functional electrical earthing of DC-side negative or positive poles is prohibited because the inverter
has no transformer. Grounding (earth ground) of module frames and mounting equipment of the PV
array modules is acceptable.
NOTE
SolarEdge's fixed input voltage architecture enables the parallel strings to be of different lengths.
Therefore, they do not need to have the same number of power optimizers, as long as the length of
each string is within the permitted range.
WARNING!
Turn OFF the AC before connecting the AC terminals. If connecting equipment grounding wire,
connect it before connecting the AC Line and Neutral wires.
NOTE
It is recommended to connect communication connections (Setting Up Communication on page
52Setting Up Communication on page 52 before connecting the AC, for easier access to the
communication board.
Connecting the AC Grid and Grounding to the
Connection Unit
This section describes how to connect the AC grid and grounding to the C onnection Unit .

Grounding

For grounding the Primary unit you can:
thread a 4 wire AC cable through the AC gland and use an additional wire/cable for PE.
l
-or-
thread a 5 wire AC cable with a PE (grounding) wire through the AC gland, see the following
l
procedure. T he AC gland supports a cable of 20-38mm diameter, for larger cables use the previous
option.
To connect AC and ground:
1. Turn OFF the AC circuit breaker.
2. Open the Connection Unit cover: Release the six Allen screws and carefully move the cover
horizontally before lowering it.
CAUTION!
When removing the cover, make sure not to damage internal components. SolarEdge will not be
held responsible for any components damaged as a result of incautious cover removal.
Extended Power Commercial Inverter Installation Guide MAN-01-00402-1.0
Chapter 4: Connecting the AC and Strings to the Connection Unit
29