Sungrow SG125HX, User Manual

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The grounding screws have been anchored to the side of the inverter before
delivery, and do not need to be prepared.
There are two grounding terminals. Use at least one of them to ground the
inverter.
-- -- E En nd d
5.6 AC Cable Connection
5.6.1 AC Side Requirements
Connect the inverter to the grid only after getting an approval from the local
electric power company.
Before connecting the inverter to the grid, ensure the grid voltage and frequency
comply with requirements, for which, refer to ""T Te ec ch hn niic ca all D Da atte e"". Otherwise, contact the
electric power company for help.
A AC C C Ciirrc cu uiitt B Brre ea akke err
An independent three-pole or four-pole circuit breaker is installed on the output side of
the inverter to ensure safe disconnection from the grid.
IIn nvve errtte err M Mo od de ell
R Re ec co om mm me en nd de ed d rra atte ed d
vvo olltta ag ge e
R Re ec co om mm me en nd de ed d rra atte ed d
c cu urrrre en ntt
SG125HX 800V 125A
Never connect a load between the inverter and the circuit breaker.
Multiple inverters cannot share one circuit breaker.
M Mu ullttiip plle e IIn nvve errtte errss iin n P Pa arra alllle ell C Co on nn ne ec cttiio on n
If multiple inverters are connected in parallel to the grid, ensure that the total number of
parallel inverters does not exceed 30. Otherwise, please contact SUNGROW for
technical scheme.
M MV V T Trra an nssffo orrm me err
The MV transformer used together with the inverter should meet the following
requirements:
•
The transformer may be a distribution transformer, and it must be designed for the
typical cyclical loads of a PV system (load in the day and no load at night).
•
The transformer may be of the liquid-immersed type or dry type, and shield winding
is not necessary.
5 Electrical Connection User Manual