GSHK 2K User manual

Installation and Operation Manual
Applicable model: 2K/3K/3.6K/4K/5K/6K
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User Manual - Contents
Contents
Forward - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4
Application Model - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4
Applicable Personnel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4
Symbol Conventions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5
1 Safety Precautions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6
1.1 Personnel Safety- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6
1.2 PV Inverter Protection- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6
1.3 Installation Safety- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6
1.4 Electrical Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7
1.5 Operating and Commissioning- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7
1.6 Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7
1.7 Additional Information- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8
2 Overview of the Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
2.1 Functional Models- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
2.2 Network Application- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
2.3 Outline and Dimensions- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -10
2.4 Working Process - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 12
2.5 Working Modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 13
3 Storage - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 14
4 Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15
4.1 Checking the Outer Packing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15
4.2 Moving the inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -16
4.3 Identify the PV Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 16
4.4 Installation Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -17
4.5 Installing a Rear Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 22
4.6 Installing the Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 24
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5 Electrical Connections- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 25
5.1 Connecting Protection Ground (PGND) Cables - - - - - - - - - - - - - - - - - - - - - - - - 25
5.2 Connecting AC Output Cables - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 27
5.3 Connecting the PV Strings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 30
5.4 Connecting Communication Cables - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 34
5.5 Power limit (optional) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 35
5.6 Installation Verification - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 38
6 System Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 39
6.1 Powering ON the Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 39
6.2 Powering OFF the Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 39
7 User Interface - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 40
7.1 LED specification definition - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 41
7.2 LCD automatic-page-turning display - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 42
7.3 LCD Warning display - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
8 Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -44
8.1 Routine Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -44
8.2 Inverter Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
8.3 Removing the Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -47
9 Warranty - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -48
9.1 Quality Terms - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -48
9.2 Liability Waiver - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -48
10 Disposal of the Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -49
11 Technical Specifications- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -50
User Manual - Contents
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4
Forward
Dear User,
Thank you so much for your choosing 2K-6K, the latest generation of grid-tied PV Strings inverter (hereinafter referred to as the
inverter) designed and developed by the 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
Applicable Personnel
This user manual is intended for photovoltaic (PV) inverter operating personnel and qualified electrical technicians.
Notes :
This user manual is subject to change ( specific please in kind prevail ) without prior notice .
2K/3K/3.6K
4K/5K/6K
User Manual - Forward
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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, 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
REFER
5
User Manual - Forward
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1 Safety Precautions
Before using the product, 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.
1.2 PV Inverter Protection
a. Ensure there is no electronical connections around ports of the PV inverter before installation;
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 exempted from the company if damage is caused by installation faults.
NOTICE
NOTICE
6
User Manual - Safety Precautions
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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, under good insulation, and with appropriate specification.
1.4 Electrical Connections
a. Before getting the permission of electrical power authority in the country/region, the grid-
tied PV inverter cannot start power generation.
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
7
When the photovoltaic array is exposed to light, it supplies DC voltage to the PCE.
WARNING
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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
8
User Manual - Safety Precautions
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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 single-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.
3K
Power class code
Figure 2.1 Model number descriptions
2.1 Functional Models
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
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User Manual - Overview of the Inverter
2.1.2 Model Description
Figure 2.1 shows a model number of the inverter, using 3K as an example.
2.2 Network Application
2.2.1 Grid-tied PV Power Systems
The series applies to grid-tied PV power systems for outdoor power stations. Typically, a grid-tied PV power system consists of PV
modules, grid-tied inverters, AC distribution units, and low-voltage power grid, as shown in Figure 2.2.
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2.3 Outline and Dimensions
2.3.1 Outline
Figures 2.3 to 2.7 show the outline of the inverters as follows:
Figure 2.2 a low-voltage grid-tied PV power system
PV strings Inverter AC Distribution Unit low-voltage power grid
Figure2.4 4K-6K PV Inverter with Dual MPPT Input (unit: mm)
Figure2.3 2K-3.6K PV Inverter with Single MPPT Input (unit: mm)
10
320mm
344mm
137mm
350mm
347mm
137mm
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Figure 2.7 The bottom view of this series of inverter
Figure 2.5 The front view and amplification effect of LED indicator area
2K-3.6K PV Inverter with Single MPPT Input 4K-6K PV Inverter with Dual MPPT Input
Figure 2.6 The rear view of this series of inverter
11
1. PV input connectors
2. COM2(RS-485/meter/CT/DI)
3. COM1(WIFI/GPRS/Ethernet/ RS-485)
4. AC output connector
5. External protection ground interface
6. Vent valve
7. DC isolat i on switch
LED LCD(op!onal)
1234
5
6
72~3.6K 4~6K
1234
5
6
7
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Figure 2.9 shows the circuit diagram for the 4K-6K Inverter with Dual MPPT Input:
Figure 2.8 circuit diagram
Figure 2.9 circuit diagram
DC
EMI
Filter
1
MPPT
Route
Inverter circuit
AC EMI Filter
Relay
L
N
PE
AC surge
protector
PV DC
Switch
DC
EMI
Filter
1
MPPT
Route1
PV DC
Switch
Relay
L
N
PE
MPPT
Route2
AC surge
protector
DC
EMI
Filter
2
12
2.4 Working Process
2.4.1 Basic principle Description
The 4K-6K PV Inverter with Dual MPPT Input receives input from two strings of PV panel (2K-3.6K PV Inverter with Single MPPT Input
receives input from only one string of PV panel). Then the inputs are grouped into two independent MPPT routes inside the
inverter to track the maximum power point of the PV panel. The two MPPT power is then converted into DC Bus, then the DC power
is converted to AC power through an inverter circuit. Finally the AC power is fed to the Power grid. EMI filer is used on both the DC
and AC sides to reduce the electromagnetic inference; Surge protection is supported on AC side.
2.4.2 Circuit Diagrams
Figure 2.8 shows the circuit diagram for the 2K-3.6K PV Inverter with Single MPPT Input:
Inverter circuit
AC EMI Filter
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Table 2.1 Working modes description
2.5 Working Modes
Three working modes of the inverter are shown as follows: standby, operating, and shutdown. Table 2.1 shows the conditions
for the inverter to switch between working modes.
The PV inverter enters the standby mode when
>the input voltage of PV Strings can enable auxiliary power supply to run, but cannot meet the
inverter operation requirements.
>the input voltage of PV Strings can meet the inverter to-start requirements, but cannot meet its
minimum power requirements.
When the PV inverter is grid-tied and generates electricity, it
>tracks the maximum power point to maximize the PV String output.
>converts DC power from PV strings into AC power and feeds the power to the power grid.
The PV inverter will enter to the shutdown mode if detecting a fault or a shutdown command.
Modes
Standby
Operating
Description
The PV inverter switches from standby or operating mode to shutdown mode if detecting a fault or a
shutdown command.
The inverter switches from shutdown mode to standby mode if receiving a Startup command or
detecting that a fault is rectified.
Shutdown
13
instructions: if the equipment is used in a manner not specified
by the manufacturer, the protection provided by the equipment may be impaired.
NOTICE
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3 Storage
This chapter describes the storage requirements for the inverter.
The following storage instructions apply if the PV inverter will not be deployed immediately:
>Do not unpack the inverter (put desiccant in the original box if the PV inverter is unpacked).
>Store the PV inverter at a temperature range of -25℃ to +60℃ and with the relative humidity of 0% to 100% (no condensing).
>The PV inverter should be stored in a clean and dry place and be protected from dust and water vapor corrosion.
>2K-3.6K PV Inverter with Single MPPT Input a maximum of eight layers of inverters can be stacked, 4K-6K PV Inverter with Dual
MPPT Input a maximum of six layers of inverters
can be stacked.
>Do not position the inverter at a front tilt, excessive back tilt, or side tilt, or upside down.
>Conduct periodic inspection during storage. Replace the packing materials immediately if any rodent bites are found.
>Ensure that qualified personnel inspect and test the inverter before use if it has been stored for a long time.
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User Manual - Storage
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4 Installation
4.1 Checking the Outer Packing
a. When receiving the inverter, check that the packing materials are intact.
b. After unpacking, check that the deliverables are complete, intact, and consistent with your order list.
c. Examine the PV inverter and its fittings for damage such as scraps and cracks.
Do not install the inverter in a place where personnel are likely to come into contact with its
enclosure and heat sinks to avoid electrical shock/burn.
Figures 4.1 The deliverables: The inverter and its fittings
CAUTION
DANGER
15
User Manual - Installation
Do not install the inverter on flammable building materials or in an area where flammable
or explosive materials are stored.
or or
or
G
Items
A
B
C
D
E
F
G
H
Deliverables
The inverter
Rear panel
AC output connector
File package
DC terminal connector group
Screws
Removal tool for DC connector
Expansion screw group
(reserved for !ghtening the support and rear panel)
H
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Figure 4.2 Moving the inverter
>Do not place the PV inverter with its wiring terminals contacting the
floor because the power ports and signal ports at the bottom of the device are not designed
to support the weight of the inverter.
>When placing the inverter on the floor horizontally, put foam or paper under to
protect its enclosure.
4.3 Identify the PV Inverter
4.3.1 Nameplate
After moving the PV inverter from packing box, identify it by reading its nameplate labeled on the side of the inverter. The
nameplate contains important product information: the model information, communications/technical specifications, and
compliance symbols.
CAUTION
If any damage mentioned above is found, contact the dealer immediately.
4.2 Moving the inverter
After checking the outer packing, move the PV inverter to the designated installation position horizontally. Hold the handles on
both sides of the inverter, as shown in Figure 4.2.
NOTICE
16
PV modules for non-isolated inverters. Non-isolated inverters shall be provided with
installation instructions that require PV modules that have an IEC 61730 Class A rating. If the
maximum AC mains operating voltage is higher than the PV array maximum system voltage
then the instructions shall require PV modules that have a maximum system voltage rating
based upon the AC mains voltage.
NOTICE
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4.3.2 Compliance and Safety Symbols
Electrical shock!
There are residual voltages in the PV inverter. It needs 5 minutes to finish discharge.
5mins
The PV inverter must not be touched when in operation. Its enclosure and heat
sinks are extremely hot.
Electrical shock! This part is charged. Only qualified and/or trained electrical technicians are
allowed to perform operations on the inverter.
If the inverter service life has expired, dispose it in accordance with local rules for disposal
of electrical equipment waste. Do not dispose the PV inverter with household garbage.
The PV inverter is compliant with TUV.
Safety symbol Description
Applies to wall-mounting installation, as described below in detail.
Basic Requirements
a. The inverter is protected to IP65 and can be installed indoors or outdoors.
b. The installation method and position must be appropriate for the weight and dimensions of the inverter.
c. Do not install the inverter in a place where personnel are likely to come into contact with its enclosure and heat sinks because
these parts are extremely hot during operation.
d. Do not install the inverter in an area that stores flammable or explosive materials.
a. The ambient temperature must be below 50℃ to ensure the inverter’s optimal operation
and extend its service life.
Installation Environment Requirements
4.4.1 Determining the Installation Position
4.4 Installation Requirements
17
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The inverter must be installed in a well ventilated environment to ensure good heat dissipation.
b.
c. The inverter must be free from direct exposure to sunlight, rain, and snow to extend its service life.
It is recommended that the inverter be installed in a sheltered place. If no shelter is available, build an awning, as
shown in Figure 4.3.
Figure 4.3 Installation environment with awning (unit: mm)
Carrier Requirements
Installation Space Requirements
a. It is recommended that the inverter be installed at eye level to facilitate operation and maintenance.
b. Reserve enough clearance around the inverter to ensure sufficient space for installation and heat dissipation, as shown in
Figure 4.4.
a. The carrier where the inverter is installed must be fire-proof. Do not install the inverter on flammable building materials.
b. The wall must be solid enough to bear the weight of the inverter.
c. Do not install the inverter on a wall made of gypsum boards or similar materials with weak sound insulation to avoid noise
disturbance in a residential area.
the front view
Awning
the lateral view
≥500
≥1000
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the front view the lateral view
Figure 4.4 Installation Space Requirements (unit: mm)
c. When installing multiple inverter, install them along the same line (as shown in Figure 4.5) if sufficient space is available,
and install them in triangle mode (as shown in Figure 4.6) or in stacked mode (as shown in Figure 4.7) if no sufficient space is
available. The installation modes ensure sufficient space for installation and heat dissipation.
Figure 4.5 Installation along the same line (unit: mm)
>500
>500
>600
>150 >150
150 150
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150
1000
100
300
Figure 4.6 Installation in triangle mode (unit: mm)
Figure 4.7 Installation in stacked mode (unit: mm)
The clearance between multiple inverters must be increased to ensure proper heat
dissipation when they are installed in a hot area.
NOTICE
150
20
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