PV Module Installation Instructions
10
/
12
7．
Electrical Installation
Grounding Connection
◇
The modules needs to be grounded, although it has been confirmed that the module
meets the security level II and it meets local electrical directives and regulations.
◇
The grounding connection operation should be carried out by qualified electrician.
◇
Use the suitable grounding wire to connect the modules’ frame to each other and it
is recommended to use 4-14 (the 10mm²) mm² copper conductor (AWG 6-12) as
the grounding conductor. The grounding hole of the module uses grounding
identification. All conductive connection points must be securely connected.
◇
Stainless steel material shall be used for bolts, nuts, washers, lock washers or other
related parts unless otherwise specified.
◇
The following grounding method is recommended.
◇
Bolt + toothed nut + cup washer
垫圈
◇
In accordance with the above diagram, the copper conductor is connected to the
grounding hole of the module frame through grounding parts (M5 stainless steel
cover bolts, M5 stainless steel flat washers, M5 stainless steel cup-shaped washers,
M5 stainless steel toothed nut) and connect flat washer and cup-shaped washers by
the wire. Ensure that the cup-shaped washers are between the frame and the wire
and concave faces up to prevent current corrosion. Tighten the bolts securely by
stainless steel toothed nuts. Torque wrenches may be used during installation. The
tightening torque of the nut is 3~7nm.
◇
The modules’ installation could use grounding device registered by the third-party
to ground the metal frame of the modules. The device must be installed in
accordance with the installation instructions of grounding device manufacturer.
Test.Debugging and Troubleshooting
◇
The serial modules are connected to the test before the system. Use digital
multimeter (recommended Fluke 170 series or digital multimeter which DC range
can reach 1000V) to check open-circuit voltage of the series modules. The
Tighten bolts with toothed
nuts.
Connect the wire between
the flat washer and the
cup-shaped washer. Place
a
cup-shaped
washer
between the border and
the
wire
(concave
upward)
