LG LG N1C-G4 Series, Руководство по установке

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Parallel connection for more current
5
Electrical Installation
Parallel Connection
• The solar modules may be combined in parallel to
produce the desired current output.
• When modules are combined in parallel, the total
current is equal to the sum of currents from each
module.
• The voltage of each module connected in parallel
should be same.
• When connecting plural strings of modules in
parallel every series string or solar module must be
fused prior to combining with other strings.
By pass diodes are factory installed in the solar
modules.
• Please refer to the applicable regional and local
codes for additional fusing requirements and
limitations on the maximum number of solar
modules in parallel.
• Maximum parallel strings without proper measures,
e.g. fuse 20A and/or blocking diode : 1 string
Parallel configuration is not limited if proper
measures are taken to block the reverse current
flow, e.g. fuses for the protection of the module
and cables from over-current and/or blocking
diodes for prevention of unbalanced string voltage.
• A multiplying factor is required for increased output
of the PV modules. Under normal conditions, a PV
module is likely to experience conditions that
produce more current and/or voltage than reported
at standard test conditions. Accordingly, the values
of Isc and Voc marked on this PV module should
be multiplied by a factor of 125% when
determining component voltage ratings, conductor
ampacities, fuse sizes, and size of controls to the
PV output.
• Depending on national directives additional safety
factors might be applicable for overcurrent
protection.
Caution
• Avoid all electrical hazards when installing, wiring,
operating and maintaining a panel.
• Do not use panels of different electrical or physical
configurations in the same system.
• Match the polarities of cables and terminals when
making the connections; failure to do so may result
in damage 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 the lightning rod to protect the system.
• The junction box should not be opened. Opening
the junction box may 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 provided by LG Electronics.
Electrical Connections
• Modules may be connected in series and/or
parallel to achieve the desired electrical output as
long as certain requirements are met.
• Please use only the same type of modules in a
combined source circuit.
• Do not disconnect the module under load.
Shock hazard can occur near the solar modules
connection means.
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 same.
• The maximum number of series connected
modules can be determined by basis on max.
system voltage, the 125% safety factor, and the
module Voc which can be checked in “Product
Specifications” in this document.
• Do not exceed 80% of maximum system voltage.
• The maximum solar module configuration can be
found in “Product Specifications”.
Series connection for more voltage
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