Version 20130301
Version 20130301
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 voltsor 1000 volts depending on the product
family 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
.
•
Caution: do not metalize the cables too tight. Any cable damage caused by cable
management system is not be covered under Suntech's warranty.
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.
No.11
*
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.
*
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.
No.11
•
Please refer to local regulations to determine the system wires size, type and
temperature.
•
Suntech modules are supplied with connectors used for system electrical
connections. The recommended connectors are H&S Radox
TM
connectors, Amphenol
H4, Multi Contact MC4. Suntech strongly recommends using the genuine connector
type specified by Suntech's product data sheet. Any choice of a different connector
type other than specified may void the warranty of the module.
•
To ensure reliable electric connection and to prevent possible intrusion of
humidity, H&S Radox
TM
integrated twist locking connectors have to be fully mated
together and then manually twisted clockwise ( a turn of around 90 shall be performed
until the gap between the 2 connectors is closed), while two Amphenol H4 or two Multi
Contact MC4 connectors must be mated and locked together until a click can be heard.
•
Long-term exposure to wet environments may cause connectors' poor
connectivity, resulting in current leakage and poor conductivity. Suntech recommends
proper connector/cable/wire management to prevent moisture intrusion. Depending
on the amount of humidity, Suntech recommends periodic inspections of the
installation system to maintain optimal module performance.
•
The DC current generated by photovoltaic systems can be converted into AC
and fed into a public Grid. As local utilities’ policies on connecting renewable energy
systems to the Grids vary from region to region. Always seek the advice from a qualified
system designer or integrator. Building permits, inspections and approvals by the local
utility are generally required.
Grounding
•
For grounding and bonding requirements, please refer to regional and national
safety and electricity standards. If grounding is required, use a recommended
connector type for the grounding wire.
•
For grounding, this guide refers to module frame grounding. If grounding is
required, make sure module frames (metal exposed to touch) are always grounded.
•
Suntech recommends always refer to local state and national code requirements
for PV module grounding. Negative system grounding may be required by local
authorities and can therefore be recommended.
•
In the event of grounding is required, the grounding wire must be properly
fastened to the module frame to assure adequate electrical connection.
•
Suntech recommends one of the following parts for grounding:
1) Use WEEB-DPF to bond solar modules to module mounting brackets (grounding
part is tested to UL467)
No.12
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