6
6.3 Grounding
Trunsun Solar modules use an anodic oxidized
aluminum frame to resist corrosion. So the
frame of modules must be connected to the
equipment grounding conductor to prevent
thunder and static injury. The grounding device
must be fully contact with the inside of the
aluminum alloy, and must penetrate the surface
of the frame oxidation film.
Please don’t drill any additional grounding hole
on the frame of the modules.
For optimal performance, Trunsun Solar
recommend the DC cathode of the modules
array is connected to ground. Failure to comply
whit this requirement may reduce the
performance of the system.
The grounding method must not result in direct
contact of dissimilar metals with the aluminum
frame of the modules that will result in galvanic
corrosion. An addendum to UL standard 1703
“Flat Plate Photovoltaic Modules and Panels”
recommends metal combinations not exceed
electrochemical potential difference of 0.6 volts.
The frame rails have pre-drilled holes marked
with is a grounding sing. These holes should
be used for grounding purpose and must not be
used for mounting the modules. The following
grounding methods are available.
There is a grounding hole 4.0mm diameter on
the edge side closer to the middle of the back
frame of module. All module frames should be
grounded for safety. The grounding
connections between modules must be
approved by a qualified electrician, the
grounding itself must be made by a qualified
electrician. The grounding clip accepts solid
uninsulated copper wire sizes 12 AWG. The
wire must not be nicked.
The module shall wire in accordance with the
standard, the grounding method of the frame of
arrays shall comply with IEC 61215. Of course,
in accordance with local laws and regulations to
carry out electrical installation is the best
choice.
Use the UL listed grounding clip manufactured
by Tyco Electronics Corp with type name
1954381-2. Place the grounding clip onto the
module frame so that the screw straddles the
grounding hole, then tighten the screw and nut
with a torque 2.3 to 2.8 Nm. The head of the
screw must be flush with the base and the base
must be flush with the frame. The copper wire
should not be compressed during the
installation.
Place a 12 AWG copper wire in the wire slot
then engage the slider. Detailed process is as
the following:
Figure 4
Trunsun solar modules can be grounded using
third party grounding devices so long as the are
certified for grounding modules and the devices
are installed according to the manufactures’s
specified instructions.
6.4 Wiring
Modules are equipped with factory installed
wires and quick connectors. Modules have
been designed to be easily interconnected in
series.
Bolt diameter is
4mm.
