SolarEdge SE66.6KUS - Connecting the AC and DC Strings to the Connection Unit; Connecting the AC Grid to the Connection Unit

Chapter 4: Connecting the AC and DC Strings
to the Connection Unit
TheSafetySwitchintheConnectionUnitdisconnectsallungroundedDCconductorsincompliancewith
theNationalElectricCode(NEC;SpecificallyNEC690.35,whichaddressesungroundedPVarrays).The
ConnectionUnitisratedtothemaximumoperatingconditionsoftheinverter.
Invertersofdifferentmodelsmightbeequippedwithdifferentsizes/typesofterminalblocks.
NOTE
If connecting to a Delta Grid perform the 'To set the inverter for 208V delta grid connection' procedure
as described in Setting the Inverter to Support 208V 3-wire Grid on page 41, before connecting the AC
and strings to the Connection Unit.
Connecting the ACGrid to the Connection Unit
Figure 29: Inside the Connection Unit
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 optimisers, as long as the length of
each string is within the permitted range.
NOTE
It is recommended to connect communication connections (Setting Up Communication on page 57)
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ConnectionUnit.
NOTE
If opposite polarity DC Conductors are routed in the same conduit for 480V inverters, use 1000 rated
cables and for 208V inverters use 600VDC rated cables.
Chapter 4: Connecting the AC and DC Strings to the Connection Unit
-Three Phase Inverter with Synergy Technology Installation MAN-01-00402-1.4
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