Install Manual

Connecting the Strings to the Safety Switch
YoucanconnectsystemswithmultipleDCstringsinparalleltotheDCinputterminalsoftheswitch.
Invertershaveone,twoorthreepairsofDCinputterminals,dependingontheinverterpowerrating.If
morestringsarerequired,theycanbeconnectedinparallelusinganexternalcombinerboxbefore
connectingtotheswitch.Whenconnectingmultiplestrings,itisrecommendedtorunseparatecircuits
totheSafetySwitchortopositionthecombinerboxneartheswitch.Thissimplifiescommissioningby
allowingtestingandservicingneartheinverter.
To connect the strings to the safety switch:
1. Strip5⁄16''(8mm)oftheDCwireinsulation.
2. InserttheDCconduitintotheDC-sidedrillguidethatwasopened.
3. Equipmentgrounding:ConnecttheDCequipmentgroundconductortotheequipmentgrounding
terminalblockintheSafetySwitch.
NOTE
Functional Electrical Earthing of DC-side negative or positive is prohibited because the inverter has no
transformer. Equipment grounding of exposed conductive surfaces in the array is required per the NEC.
4. ConnecttheDCwires:
CAUTION!
Ensure that the Plus (+) wire(s) is connected to the (+) terminal and that the Minus (-) wire is connected
to the Minus (-) terminal connector.
ATTENTION!
Veillez à ce que le câble(s) Plus (+) soit connecté au terminal (+) et que le câble (-) soit connecté au (-)
terminal.
NOTE
For systems with four PV strings per unit or more, fuses may need to be installed in
both the positive and negative conductors as required by NEC Article 690.9. For more
information, refer to the Technical Note “String Fusing Requirements in SolarEdge
Systems” at http://www.solaredge.com/files/pdfs/string_fusing_requirements.pdf.
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.
l Forthreephaseinverters9kW,10kWand20kW-ConnecttheDCwiresfromthePVinstallationtothe
DC+andDC-terminalblocks,accordingtothelabelsontheterminals:
a. Useastandardflat-bladescrewdrivertoconnectthewirestothespring-clampterminals.The
screwdriverbladeshouldfitfreelyintheterminalopening.Toolargeabladecancracktheplastic
housing.SeeFigure25
b. Insertthescrewdriverandfirmlytiltittopressthereleasemechanismandopentheclamp.
c. Insertthewireintothefrontopening.
d. Removethescrewdriver–thewireisautomaticallyclamped.Checkthatthewireisfullyinserted
andcannotbepulledouteasily.
Chapter 4: Connecting the AC and the Strings to the Safety Switch
-Three Phase System Installation Guide MAN-01-00527-1.1
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