Version 20120701
Version 20120701
Electrical Installation
General installation
•
Any hardware used must be compatible with the mounting structure material to
avoid galvanic corrosion.
•
It is not recommended to use modules with different configurations (grounding,
wiring) in the same system.
•
Excessive cables must be organized or fixed in an adequate way, e.g. attached to
the mounting structure by using non-metallic cable ties.
Solar connectors should not
be exposed to water exposure and water submersion.
•
For applications requiring high operating voltage several modules can be
connected in series to form a string of modules; the system voltage is then equal to the
sum of the voltage of each module.
•
For applications requiring high operating currents several strings of modules can
be connected in parallel; the system current is then equal to the sum of the current of
each string of modules.
•
The maximum system voltage is 600 volts DC according to UL standards. However
products are rated for use up to 1000V where UL standards do not apply. (UL Only)
•
The maximum number of series connected modules depends on system design,
the type of inverter used and environmental conditions.
•
Based on the maximum series fuse rating of module and local electrical installation
code, always make sure Suntech PV modules with more than three strings in parallel
for connection need to be assembled with the appropriate string fuse for circuit
protection.
•
There is no limitation on the number of modules that can be connected in parallel,
the number of modules is determined by system design parameters such as current or
power output.
•
To prevent the cables and the connectors from overheating, the cross section of
the cables and the capacity of the connectors must be selected to suit the maximum
system short circuit current. The recommended cable is PV wire with a cross section of
at least 4mm
2
.
No.10
*
The loads of 2400 Pa, 3800 Pa and 5400 Pa are under IEC standard. The installation
methods applicable for 5400 Pa are also relevant for 3800 Pa and 2400 Pa. The installation
methods applicable for 3800 Pa are also relevant for 2400 Pa.
**
The module clamps must not come into contact with the front glass or deform the
frame in any way. Avoid shading effects from the module clamps and insertion systems.
Drainage holes in the module frame must not be closed or obscured by the clamps.
***
Measurement A stands for the distance from the module edge to the clamping zone.
Measurement A is 108 mm for W series 50mm thickness, 180mm for W series 35mm
thickness, 127 mm for V series 50mm thickness (including Vdx) and 280mm for V series
40mm thickness. The clamping zone defines the range for the middle point of the clamp.
Suntech Wdl (Made in Korea) module
No.11
No.10
2400 Pa Load *
2400 Pa Wind Load
2400 Pa Snow Load
5400 Pa Load *
5400 Pa Snow Load
2400 Pa Wind Load
5400 Pa Load *
5400 Pa Snow Load
3800 Pa Wind Load
M
oun
ting
sy
st
em
Use four mounting holes
Clamping sy
st
em
**
A
ttachmen
t t
o the long fr
ame
Lengt
h
Use four clamps
Use four clamps
Use six clamps
Clamping sy
st
em
**
A
ttachmen
t t
o the shor
t fr
ame
Widt
h
Use four clamps on short frame
Widt
h
Long Frame Centre±150mm
Long Frame Centre±150mm
Use four clamps on the short frame and
two clamps at the center of each long frame
Inser
tion S
yst
em
Insertion system
Insertion system
Use insertion system on short frame
Insertion system
Insertion system
Use insertion system on a
short frame and two
clamps at the center of
each long frame
Inse
rt
ion system
Inse
rt
ion system
Use an insertion
system on a long
frame
Clamping Zone
From Module Edge to
1/4 Length ± 50mm
Clamping Zone
(200mm)
Clamping Zone
Clamping Zone
Clamping Zone
From Module Edge to
1/4 Width ± 50mm
Clamping Zone
From Module Edge to
1/4 Width ± 50mm
Clamping Zone
(100mm)
Clamping Zone
(100mm)
200mm
200mm
200mm
200mm
