LG LG***N1CK-A3 Installation Instructions Manual Download Page 5

5

-

-

Parallel connection for more current

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 the same.

• When connecting plural strings of modules in

parallel every series string or solar module must be
fused prior to combining with other strings.

• Abide with all applicable federal, state, 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 : 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 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. The requirements of
the National Electrical Code (NEC) in Article 690
shall be followed to address these increased
outputs. In installations not under the requirements
of the NEC, the values of Isc and Voc marked on
this PV module should be multiplied by a 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.

• 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 provided 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 is within the guidelines on the product
specification sheet.

• Please use only the same type of modules in a

combined source circuit.

• Do not disconnect the module under when it is

operating.
Shock hazard may occur near the solar modules
connection means.

Diodes

• All LG modules are equipped with factory installed

bypass diodes. The factory-installed diodes provide
proper circuit protection for the systems within the
specified system voltage.

Series connection for more voltage

+

-

1

D1

D2

D3

2

3

4

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 max
system voltage, the 125% safety factor not
explained in specifications, and the module Voc
which can be checked in Product Specifications in
this document.

Do not exceed 80%

of maximum system voltage.

• Maximum Module configuration (recommend) :

refer to the ‘Product Specification’ in this manual.

Diode specification and configuration

[HUBER&SUHNER]

[JMTHY]

I

F

(AV)

V

F

(max)

V

RRM

T

j

(max)

R

TH

2X7.5A

0.84V

45V

175°C

1.7°C/W

I

F

(AV)

V

F

(max)

V

RRM

T

j

(max)

R

TH

25A

0.6V

50V

200°C

2.0°C/W

Summary of Contents for LG***N1CK-A3

Page 1: ...N1C W K A3 LGXXXN1C W K B3 A minimum slope of 5 in ft for installation over a roof is required to maintain the fire class ratings The array frame shall be grounded in accordance with NEC Article 250 Installation Instructions MFL68783801 ...

Page 2: ...iability Disposal 10 7 Transporting and Storage 10 8 Appendix 11 Date Version Remark Description of change 2013 08 13 2014 02 07 2014 09 24 2014 10 14 2014 10 20 2014 11 13 1 0 1st edition 2 0 3 0 4 0 5 0 6 0 Add B3 Model LGXXXN1X B3 Add 305 310W Power output Model Add Appendix Contents Edit to description of Mechanical Installation Edit to Electrical Properties Except K Model ...

Page 3: ...ty gear Contact may result in lethal spark or electric shock Do not use or install if the module is broken or torn Failure to comply may result in electric shock Perform all work in dry conditions and use only dry tools Do not handle wet panels without appropriate protection equipment Failure to comply may result in accident or death accident or death Damaged modules must be treated with safety pr...

Page 4: ... solar module After installation or repair check that the solar module are operating properly In the event that the currently used solar module or parts have been replaced the newly replaced module and parts must have the same model name and parts as the previously installed solar module Secure all necessary permits and licenses to install the solar modules Only qualified and authorized individual...

Page 5: ...PV output Depending on national directives additional safety factors might be applicable for overcurrent protection 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 provided by LG Electronics Electrical...

Page 6: ...should be performed by an authorized installer for the safety and maintenance of the system in accordance with all national state and local electrical codes and regulations and standards Specific information on the solar module dimensions and location of grounding holes is provided in Product Specifications One M4 stainless steel bolt one nut one spring washer two flat washers one cup washer one s...

Page 7: ...r from entering the junction box which could cause a safety hazard Clearance between the solar module frames and structures such as roofs or ground is required to prevent wiring damage and to allow air to circulate behind the solar module The recommended standoff height is a minimum of 100mm When installed on a roof the solar module must be mounted over a fire resistant roof covering rated for the...

Page 8: ...frame and two clamps at the center of long Frame Clamping Range 230mm Use four clamps on the Short frame This method is not tested by IEC UL This installation is allowed in the following cases 1 Slope roof If module is installed parallel to the rooftop 2 Flat roof If installed with an additional stand such as wind shield or deflector Clamping Range From module Edge to 270mm Clamping Range From mod...

Page 9: ...rcent Standard Test Condition STC Irradiation 1 000W m2 Cell temp 25 C 1 5AM Dimensions of Modules Note Relative efficiency reduction by respect to irradiance MC4 formal name PV KST4 6II UR PV KBT4 6II UR A safety locking clip MC PV SSH4 may be required per article 690 of NEC 2008 Note Holder is for the convenient connection of junction box cable but that does not warranty if it is broken after in...

Page 10: ...ervice of LG Solar Modules and if applicable from all liabilities claim Solar Modules and if applicable from all liabilities claims demands losses or damages on my account caused or alleged to be caused in whole or in part by the negligence of the LG its affiliated companies successors or assigns its administrators directors agents officers volunteer and employees Disposal Please contact us if you...

Page 11: ...amples of Rails and WEEBs are included in the following tables Torque 8 12Nm LG Model LGxxxS1C W K A3 LGxxxS1C W K B3 LGxxxN1C W K A3 LGxxxN1C W K B3 Rails and WEEBs Test sample for UL test UGC 1 Top Mounting UniRac Inc Grounding Clips No Rail Washer Clamp Compatibility UGC 1 UniRac 1 Solarmount Standard Solarmount Light Solarmount HD WEEB DMC UL file no QIMS2 E351343 IronRidge 2 Standard Rail XRS...

Page 12: ...12 Appendix No Rail Washer Clamp Compatibility WEEB KMC Everest 3 CrossRail 48 CrossRail 38 WEEB PMC UL file no QIMS2 E351343 UL file no QIMS2 E351343 ProSolar 4 Rooftrac Groundtrac ...

Page 13: ...ionally Important Notes 1 The NEC section 690 43 states Exposed non current carrying metal parts of module frame equipment and conductor enclosures shall be grounded in accordance with 250 134 or 250 136 A regardless of voltage 2 Use general purpose anti seize compound on fastener threads when installing WEEBs 3 WEEBs are intended for SINGLE USE ONLY Functionality will not be guaranteed if reused ...

Page 14: ...om http www lgsolarusa com This document is subject to change without notice LG LG logo and Life s Good are trademarks of LG Electronics Inc worldwide Trademarks and intellectual properties of LG Electronics Inc are protected by international copyright laws Document II A3 N UL V5 EN 201308 ...

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