44
The main internal electrical devices have been connected to the ground copper bar
before delivery.
E
Exxtte
errn
na
all G
Grro
ou
un
nd
diin
ng
g
Two external grounding points are located at the bottoms on the left side and right side
of the inverter.
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ussttrra
attiio
on
nss
D
De
essc
crriip
pttiio
on
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Left-side view of the inverter.
The external grounding point is shown in the left figure.
Right-side view of the inverter.
The external grounding point is shown in the left figure.
The external grounding points of the inverter can be grounded in the following two
manners:
•
Connect the grounding cable to the external grounding points with M10 bolts, where
the recommended cable is of 50 mm
2
to 95 mm
2
.
•
Weld the grounding steel flat onto the external grounding point, after which anti-
corrosion processing needs to be performed.
It is recommended that two points of the inverter should be connected to the ground
system of the PV plant.
The inverter needs to be grounded on site. The following operations should
also be conducted on site:
Measure the electrical conductivity between the device ground terminals and
the total equipotential connection copper bar to ensure the effectiveness of
the internal ground connection.
Perform the external grounding according to on-site situation and instructions
of the plant staff.
The grounding resistance should be no more than 4Ω.
The grounding resistance should be determined according to local standards
and regulations.
Observe the country-specific regulations and standards at all times!
System Manual
Summary of Contents for SG3125HV-20
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