19
INSTALLATION AND OPERATION MANUAL SOLAR MODULES – Q.PRO L-G4.1, Q.PRO L-G4.2, Q.PLUS L-G4.1, Q.PLUS L-G4.2 – NA
18
INSTALLATION AND OPERATION MANUAL SOLAR MODULES – Q.PRO L-G4.1, Q.PRO L-G4.2, Q.PLUS L-G4.1, Q.PLUS L-G4.2 – NA
5 GROUNDING
Functional grounding
•
When using an installation tilt of < 5° a functional grounding at
the negative generator conncetion must be implemented.
Ä
Ensure that the difference of potential between the negative
generator connection and the PE(N) of every MPP tracker of the
respective inverters is 0 V.
Ä
Follow the directions of the inverter manufacturer.
Ä
Only use inverters which include lincensed grounding kits.
Protective Grounding
In order to prevent electrical shock or fire, the frame of the module
as well as any non-current-carrying metal parts of the system must
be grounded. While this section provides some information about
grounding the Q CELLS frames and modules, reference should be
made to local statutes and regulations for specific requirements
on grounding. The U.S. National Electrical Code addresses these
issues in Article 250.
Proper grounding is achieved by bonding all exposed non-current-
carrying metal equipment to the appropriately sized equipment
grounding conductor (EGC) or racking system that can be used for
integrated grounding.
Q CELLS frames are protected from corrosion with an anodized
coating, which has to be penetrated in order to ensure proper
bonding. The different methods listed below are suggested
methods for an appropriate bond between the frame and the EGC
or racking system (that will have to be properly grounded). The
method appropriate for any individual installation will depend on
multiple factors.
Option A: Use of a grounding lug
A listed grounding lug can be bonded to the frame using the
grounding holes pre-drilled in the frame. These holes are marked
•
Dimensions shown are in inches.
0.177” (+0.008/-0)
±0.08
0.79”
0.47”
±0.08
PV Laminate
Backing Nut (Stainless Steel)
Toothed Lock Washer (Stainless Steel
or tin-plated metal)
Grounding Lug (Stainless Steel)
Equipment
Grounding
Conductor
Aluminum
Frame
Screw (Stainless Steel)
with a ground symbol, as shown below on the frame section drawing:
To install the grounding lug, follow the specified instructions of
the manufacturer. The grounding lug should be made of stainless
steel or tin plated metals such as aluminum to avoid corrosion. The
grounding lug should be attached to the frame grounding hole using
a stainless steel screw, toothed lock washer or KEPS nut (in order
to penetrate the anodized layer) and backing nut. Care should be
taken to avoid the use of grounding hardware of dissimilar metals,
which may lead to corrosion
Option B: Integrated grounding methods
The Q CELLS modules can be bonded with the racking system using
UL1703 or UL2703 certified integrated grounding methods. The
racking system will then have to be grounded so that the overall system
is properly grounded. The listed racking system and grounding device
should be installed in accordance with the manufacturers’ instructions.
An example of such integrated grounding method is the use of a
washer recognized as meeting UL2703 requirements between the
module and the racking system, when mounting the module. For
example, WEEB washers are generally compatible with Q CELLS
modules, however each combination module / racking system
requires a specific WEEB washer size. Note that WEEB washers
are intended for single use only; they must not be reused after
removal or loosening. Refer to Wiley’s installation instructions for
the specific use of WEEB washers.
6
FAULTS AND DEFECTS
DANGER!
Risk of fatal injury due to electric shock!
Ä
Do not attempt to fix any problems yourself (e.g., glass
cracks, damaged cables).
Ä
Please contact an installer or Q CELLS Technical Customer
Service Department.
Ä
Do not disconnect modules yourself.
Ä
Please commission a trade specialist.
Ä
Dispose of modules in accordance with the local disposal
regulations.
7 DISPOSAL
