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6.
Electrical Installation
CAUTION
1)
Electrical risks must be prevented during installation, distribution, generation, and maintenance of PV module.
2)
During installation of PV module, system voltage should not exceed. [IEC 1000V]
3)
When installing the system, use same rate of model. [If you use a electrically and physically different type of module, output
capacity or system performance may be reduced due to fire.]
4)
When wiring, you should connect polarity appropriately, and if not, it can cause abnormal generation performance and PV
module degradation by fire.
5)
For the reverse current value, refer the Fuse rating value specified in '11. Detailed module specification'. If exceed its value
, connect the rated overcurrent protective device(permitted by local regulation) to the module string in series wiring.
6)
Junction box is in the rear surface of the module. This box is an important device for the module generation, and never
unpack it in any circumstance in the field. [Once the junction box is opened, warranty will be invalidated.]
7)
If the PV module have any electrical problem, you should inspect the module according to the warranty term provided by
S-Energy, and return it to S-Energy for repair and replacement.
8)
The fire rating of this module is valid only when mounted in the manner specified in the mechanical mounting instructions.
9)
The module is considered to be in compliance with UL 1703 only when the module in mounted in the manner specified by
the mounting instructions below.
10)
A module with exposed conductive parts is considered to be in compliance with UL 1703 only when is electrically grounded
in accordance with the instructions presented below and the requirements of the National Electrical Code.
11)
Any module without a frame (laminate) shall not be considered to comply with the requirements of UL 1703 unless the
module with hardware that has been tested and evaluated with the module under this standard or by a field inspection
certifying that the installed module complies with the requirements of UL 1703.
In normal conditions, PV modules may produce larger current and/or voltage than reported in the standard test conditions.
Therefore, when voltage evaluations for components, capacity of conductors, size of fuses, and size of control systems connected
to the module output are determined, multiply the values of short- circuit current (Isc) and open-circuit voltage (Voc) that are
marked in SN series modules by the NEC, 1.25 (Source: American National Electrical Code)
A. Series Wiring
< SERIES WIRING [VOLTAGE ADDED] >
·
Wires may be connected in series to generate the required
voltage output.
·
Series wiring should be configured at the same rate. (current)
·
Only for UL 1703, When wires are connected in series, the
maximum voltage should be under 800Vdc that is 80% of
system Voltage 1000Vdc
· Material :
All the wire for the PV module connection should be configured with PV cable only. [Cable for PV : double insulation, UV
resistance, temperature resistant for more than minimum 90 ℃. ] Use copper wire for all wiring.
· Diameter:
At least larger than minimum 12AWG. [4mm
[wiring diameter should confirm the local regulation, and S-Energy Co., Ltd. recommends the customer use wires with a diameter
larger than the above number at minimum.]
· Module configuration[Series wiring]
[{(Min Temp ℃ – 25 ℃ ) x (Voc x -Temperature coefficient of Voc)} + Voc] x Panels per string = Maximum system Voltage
To guarantee the maximum voltage limitation condition, ensure the general temperature condition according to the National
Electric Code (690.7)
05
S-Energy PV Module Installation Manual
B. Parallel Wiring
< PARALLEL WIRING [CURRENT ADDED] >
·
Wires may be connected in parallel to generate the required
current output.
·
Even when wires are connected in parallel, the intensity of voltage
in inverter should be considered.
·
Before connected to other modules, all modules should be wired
with a fuse. For the number of additional fuses and maximum
number of module should refer and follow the related local
regulations.
2
]
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