ELECTRICAL INSTALLATION
Caution
•
Avoid all electrical hazards when installing, wiring,
operating and maintaining all panels.
•
Do not connect panels that have different electrical
properties or physical configurations in the same sy
stem.
•
Match the polarities of cables and terminals when ma
king the connections; failure to do so may result in da
mage to the panel.
•
When reverse currents can exceed the value marked
on the name plate, a properly rated and certified over
-current device(fuse or circuit breaker) must be
connected in series with each panel or string of panels.
•
The rating of the over-current device shall not exceed
the maximum series fuse rating marked on the name
plate.
•
The panel contains factory installed bypass diodes
located inside the junction box.
•
When installing the system, it is recommended to
install a lightning rod to protect the system.
•
The induced overvoltage by lightning can cause the
system damage, you should design conductor loop
connection as minimum as possible.
•
The junction box should not be opened. Opening the
junction box will void the warranty.
•
Panels with a suspected electrical problem should be
returned to LG Electronics for inspection and possible
repair or replacement as per the warranty conditions p
rovided by LG Electronics.
Electrical Connections
•
Shock hazard may occur near the solar modules
electrical connections.
•
Modules may be connected in series and/or parallel
to achieve the desired electrical output as long as it i
s within the guidelines on the product specification s
heet.
•
Please use only the same type of modules in a
combined source circuit.
•
Do not disconnect the module under when it is op
erating. Shock hazard may occur near the solar m
odules connection means.
•
When the module installing in series or in parallel (e.g.
using for extension cables, etc.), the connector of each
module should be the same products. (mated with its or
iginal female or male connector of the same supplier)
Diodes
•
All LG modules are equipped with factory installed b
ypass diodes. The factory-installed diodes provide p
roper circuit protection for the module from unexpec
ted shadows.
Series Connection
•
The solar modules may be wired in series to produce
the desired voltage output.
•
The current of each module connected in series
should be the same.
•
The maximum number of series connected modules
can be determined by basis on maximum system volt
age, the 125% safety factor, and the module Voc whi
ch can be checked in “Product Specifications” in this
document.
•
The maximum solar module configuration can be
found in “Product Specifications”.
Series connection for more voltage
………….
Diode specification and configuration
6
UKTH3045-12
I
F
(AV)
30A
V
F
(max)
0.8V
V
RRM
45V
T
j
(max)
200
℃
R
TH
0.8
℃
/W
+
-
1
D 1
D 2
D 3
2
3
4
5
6
7
8
Summary of Contents for LG390N3K-V6
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