Table of Contents
Advertisement
2
PLANNING
2.3 MOUNTING OPTIONS
TB1a,
Specifications for TB1a, TB1b, TB2a and TB2b Mounting Options
TB2a
Limited area 1 [mm]
Limited area 2 [mm]
160
160
100
257
100
257
100
Fig. 3:
Definition of limited areas.
NOTE
For a requested push load maintain a minimum distance (clearance)
between the bottom module plane (level of bottom frame leg) and
closest substructure element below solar module laminate. The
minimum clearance is defined by the maximum test push load and
the limited area where the substructure element is located beneath
the module (see figure 3 and 4).
10
INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11.2 – Q CELLS
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
5
10
15
20
25
30
35
40
45
50
TB1a, TB2a
Limited Area 1
Limited Area 2
CLEARANCE [mm]
TB1b, TB2b
Limited Area 1
Limited Area 2
Fig. 4:
Push loads in relation to minimum clearance between
frame bottom edge and substructure.
2
PLANNING
2.4 ELECTRICAL LAYOUT
Module Selection
For detailed key electrical data, please refer to the product data
sheet for the respective product. (available at www.q-cells.us).
Ä
For maximum energy yields, mismatches of specified electric
current (I
MPP
connected in series.
Safety Factor
During normal operation, a module may generate a greater current
and / or higher voltage than that determined under standardized test
conditions. Accordingly, the values of I
module should be multiplied by a facot of 1.25 when determining:
the component voltage ratings,
•
conductor ampacities,
•
fuse sizes,
•
size of controls connected to the PV output.
•
Refer to Section 690-8 of the National Electrical Code for an
additional multiplying factor of 125 percent (80 percent derating)
which might be applicable.
Ä
Please follow the valid national guidelines for the installation
of electrical systems (refer to section 690-8 of the NEC for an
additional multiplying factor of 125 percent [80 percent derating]
which may be applicable).
Series Connection
Connection of modules in series is only permitted up to the maximum
55
60
65
system voltage as listed in the applicable data sheet.
Ä
Take into account all possible operating situations and all relevant
technical norms and regulations when designing the system.
This will ensure that the maximum system voltage, including all
necessary safety margins, is not exceeded.
INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G11.2 – Q CELLS
Ä
Parallel Connection
) of more than 5 % should be avoided for all modules
Modules may be damaged by the occurrence of reverse currents
(caused by module defects, ground leaks, or defective insulation).
Ä
In order to limit reverse currents that may occur, we recommend
using the following safety options:
and V
marked on the
SC
OC
1) Layout with a limited number of
Without undertaking further current blocking measures, a maximum
of two module strings may be operated in parallel on a single
inverter or MPP tracker.
2) Layout with string fuses :
Use overcurrent devices (e.g. fuses) according to the relevant
standards in each string. Use gPV-fuses according to IEC 60269-6.
Observe the maximum permitted number of strings as indicated
in the specifications provided by the respective string fuse manu-
facturer and the technical guidelines.
NOTE!
When installing different product versions, the lowest minimum
permitted reverse current load capacity applies.
Inverters
Inverters with or without transformers may be used.
Take the voltage limit of the inverter into account when deter-
mining the maximum number of modules in the string.
Ensure that the maximum reverse current load capacity indicated
in the data sheet is met.
parallel connected strings :
11
Advertisement
Table of Contents
