LIVOLTEK GT3-50K User manual
GT3 50K-60K
Ver 00.
Contents
Forward
Application Model
Intended Audience
Symbol Conventions
1 Safety Precautions
1 1 Personnel Safety.
1 2 The PV Inverter Protection.
1 3 Installation Safety.
1 4 Electrical Connections.
1 5 Operating and Commissioning.
1 6 Maintenance.
1 7 Additional Information.
2 Overview of the Inverter
2 1 Functional Models.
2 2 Network Application.
2 3 Outline and Dimensions.
2 4 Working Modes.
2 1 1 Function. .
2 1 2 Model Description. .
2 3 1 Outline. .
2 3 2 Dimensions. .
2 2 1 Grid tied PV Power Systems. . -
4 1 Checking the Outer Packing.
4 2 Moving the 50K 60K. /
4 3 Identify the PV Inverter.
4 4 Installation Requirements.
4 3 1 Nameplate. .
4 3 2 Compliance and Safety Symbols. .
3 Storage
4 Installation
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5 Electrical Connections
5 1 Connecting Protection Ground PGND Cables. ( )
5 2 Connecting AC Output Cables.
5 3 Connecting the PV Strings.
5 4 Connecting Communication Cables.
5 5 Installation Verification.
5 1 1 Preparation. .
5 1 2 Wiring Procedures. .
5 4 1 Communication Mode Description. .
5 4 2 Connecting RS485 Communication Cables. .
5 4 3 Setting RS485 Communication Address. .
5 3 1 Preparation. .
5 2 1 Preparation. .
5 2 2 Procedure of Connecting AC Cables. .
6 System Operation
6 1 Powering ON the Inverter.
6 2 Powering OFF the Inverter.
7 User Interface
8 Maintenance
10 Disposal of the Inverter
11 Technical Specifications
8 1 Routine Maintenance.
8 2 The Inverter Troubleshooting.
8 3 Removing the Inverter.
4 5 Support mounting the Inverter. -
4 6 Installation Self check. -
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4 4 1 Determining the Installation Position. .
4 4 2 Installation Mode Requirements. .
1
GT3-50K
GT3-60K
Forward
Dear User,
Thank you so much for your choosing GT3 50K/60K, the latest generation of grid-tied PV
Strings inverter (hereinafter referred to as the inverter) designed and developed by our
company.
This user manual introduces the inverter in terms of its installation, electrical connections,
operation, commissioning, maintenance, and troubleshooting. Please read through the manual
carefully before installing and using the inverter, and keep the manual well for future reference.
Application Model
Grid-tied PV string inverter
This user manual is intended for photovoltaic (PV) inverter operating personnel and qualified
electrical technicians.
Intended Audience
This user manual is subject to change specific please in kind prevail without prior notice( ) .
Notes:
2
Indicates an imminently hazardous situation which if not correctly,
followed will result in serious injury or death, .
Indicates a potentially hazardous situation which if not correctly,
followed could result in serious injury or death, .
Indicates a potentially hazardous situation which if not correctly,
followed could result in moderate or minor injury, .
Indicates a potentially hazardous situation which if not correctly,
followed could result in equipment failure to run or property damage, , .
Calls attention to important information best practices and tips, :
supplement additional safety instructions for your better use of the
PV inverter to reduce the waste of your resource.
Refer to documentation (Remind operators to refer to the
documentation shipped with the inverter).
Symbol Conventions
Safety symbols used in this manual which highlight potential safety risks and important safety,
information are listed as follows, :
Symbol Description
WARNING
CAUTION
DANGER
NOTICE
NOTE
3
1 Safety Precautions
Before beginning your journey please read these safety precautions in User Manual carefully, .
a. The PV inverter must be installed electronically connected operated and maintained through, ,
specially trained technician;
b The qualified technician must be familiar with the safety regulations of electrical system. ,
working process of PV power generation system, and standards of local power grid;
c. The technician must read through this User Manual carefully and master it before any operation.
1 1 Personnel Safety.
a Do not tamper with any warning signs on the inverter enclosure because these signs contain.
important information about safe operation.
b Do not remove or damage the nameplate on the inverter’s enclosure because it contains.
important product information.
c Do not remove the anti dismantle label on the inverter’s enclosure because it is the basis for. -
product warranty.
1 2 The PV Inverter Protection.
a Ensure there is no electronical connections around ports of the PV inverter before installing. ;
. .b Adequate ventilation must be provided for inverter installation location Mount the inverter in
vertical direction, and ensure that no object is put on the heat sink affecting the cooling. (For
details, refer to Chapter 4 Installation)
1 3 Installation Safety.
As soon as receiving the PV inverter please check if it is damaged,
during its transportation If yes please contact your dealer immediately. , .
Please read the User Manual carefully before installing the PV inverter;
warranty or liability will be void from o if damage is causedur company
.by installation faults
NOTICE
NOTICE
4
a Input terminals of the PV inverter apply only to input terminals of PV String do not connect. ;
any other DC source to the input terminals.
b Before connecting PV modules ensure that is its voltage is within the safe range when. , ;
exposed to any sunlight, PV modules can generate high voltage.
c All electrical connections must meet the electrical standards of the country or region. .
. , ,d Cables used in electrical connections must be well fixed good insulation and with
appropriate specification.
1 4 Electrical Connections.
a Before getting the permission of electrical power sector in the country / region the grid-tied. ,
PV inverter cannot start generate power.
b Follow the procedures of commissioning described in the user manual when commissioning.
the PV inverter.
c Do not touch any other parts surface except the DC switch when the PV inverter is operating. ' ;
its partial parts will be extremely hot and can cause burns.
1 5 Operating and Commissioning.
1 6 Maintenance.
Before installing the inverter check all electrical ports to ensure no,
damage and no short circuit Otherwise personal casualty and or fire. /
will occur.
While the inverter operating high voltage can lead to an electrical,
shock hazard and even cause personal casualties Therefore, . ,
operate the PV inverter strictly according to the safety precautions in
the user manual.
Power OFF all electrical terminals before the inverter maintenance;
strictly comply with the safety precautions in this document when
operating the inverter.
DANGER
DANGER
DANGER
5
a For personal safety maintenance personnel must wear appropriate personal protective. ,
equipment (like insulation gloves and protective shoes) for the inverter maintenance.
b Place temporary warning signs or erect fences to prevent unauthorized access to the.
maintenance site.
c Follow the procedures of maintenance stipulated in the manual strictly. .
. ;d Check the relevant safety and performance of the inverter rectify any faults that may
compromise the inverter security performance before restarting the inverter.
1 7 Additional Information.
To avoid any other unforeseeable risk, contact your dealer immediately,
if there is any issue found during operation.
NOTICE
6
2 Overview of the Inverter
This chapter introduces the inverter and describes its functional model network application, ,
, , .appearance dimensions and working process etc
2 1 1 Function. .
This series is a three-phase grid-tied PV string inverter transformer less that converts the DC( )
power generated by PV strings into AC power and feeds the power into power grid.
2 1 2 Model Description. .
Figure 2 1 shows a model number of the inverter using 50K as an example. , .
2 1 Functional Models.
2.2 Network Application
2.2.1 Grid-tied PV Power Systems
This series applies to grid-tied PV power systems for industrial/commercial rooftops, fishing/
farmers light complementary power generation systems, and large ground-based power
stations. Typically, these series inverters are used in low-voltage grid-tied PV power system, as
shown in Figures 2.2&2.3
The inverter is transformerless Add an isolation transformer before.
grounding the positive negative terminal of PV modules like Thin/ (
Film module for operation) .
Do not connect PV modules in parallel to several PV inverters for
operation.
WARNING
WARNING
GT3-50K
Power class code
3：three phase
Figure 2.1 Model number descriptions
7
23 1 Outline. .
Figures 2 4 to 2 6 show the outline of the inverters as follows. . :
2 3 Outline and Dimensions.
Figure 2 2 a low-voltage grid-tied PV power system.
PV strings inverter AC Distribution Unit low-voltage power grid
Figure 2 3 Power grids supported by these series inverters.
Figure 2 4 The front view and amplification effect of LED indicator area.
Inverter
TN S-TN C-TN C S- - TT
Inverter Inverter Inverter
PV Indicator
Grid Indicator
COM Indicator
Warning Indicator
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1
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