Senergy 12K User Manual

Ver. 01
6-15K
Contents
Forward
01
Application Model
01
Intended Audience
01
Symbol Conventions
02
1 Safety Precautions
03
1.1 Personnel Safety
03
1.2 The PV Inverter Protection
03
1.3 Installation Safety
03
1.4 Electrical Connections
04
1.5 Operating and Commissioning
04
1.6 Maintenance
04
1.7 Additional Information
05
2 Overview of the Inverter
06
2.1 Functional Models
06
2.1.1 Function
06
2.1.2 Model Description
06
2.2 Network Application
2.2.1 Grid-tied PV Power Systems
2.3 Outline and Dimensions
06
06
07
2.3.1 Dimensions
07
2.3.2 Outline
08
2.4 Working Process
09
2.4.1 Basic principle Description
09
2.4.2 Circuit Diagrams
09
2.5 Working Modes
10
3 Storage
11
4 Installation
12
4.1 Checking the Outer Packing
12
4.2 Moving the inverter
13
4.3 Identify the PV Inverter
4.3.1 Nameplate
13
13
4.3.2 Compliance and Safety Symbols
14
4.4 Installation Requirements
14
4.4.1 Determining the Installation Position
14
4.4.2 Installation Mode Requirements
18
4.5 Wall-mounting the Inverter
18
5 Electrical Connections
22
5.1 Connecting Protection Ground (PGND) Cables
22
5.1.1 Preparation
22
5.1.2 Wiring Procedures
23
5.2 Connecting AC Output Cables
24
5.2.1 Preparation
24
5.2.2 Procedure of Connecting AC Cables
25
5.3 Connecting the PV Strings
5.3.1 Preparation
5.4 Connecting Communications Cables
27
28
31
5.4.1 Communications Mode Description
31
5.4.2 Connecting RS485 Communications Cables
33
5.4.3 Setting RS485 Communications Address
34
5.5 Installation Verification
6 System Operation
35
36
6.1 Powering ON the Inverter
36
6.2 Powering OFF the Inverter
36
7 User Interface
37
8 Maintenance
41
8.1 Routine Maintenance
41
8.2 Inverter warning and exception handling
42
8.3 Removing the Inverter
44
9 Quality Guarantee
46
9.1 Quality Terms
46
9.2 Liability Waiver
46
10 Disposal of the Inverter
47
11 Technical Specifications
48
Forward
Dear User,
Thank you so much for your choosing 6K-15K, the latest generation of grid-tied PV Strings
inverter (hereinafter referred to as the inverter) designed and developed by Senergytec.
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
6K/8K/10K
12K/15K
Intended Audience
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.
The latest version of user manual and other more information about the product are
available from http://www.senergytec.com, and/or by consulting your dealer.
1
Symbol Conventions
Safety symbols used in this manual, which highlight potential safety risks and important safety
information, are listed as follows:
Symbol
Description
DANGER
Indicates an imminently hazardous situation which, if not correctly
followed, will result in serious injury or death.
WARNING
Indicates a potentially hazardous situation which, if not correctly
followed, could result in serious injury or death.
CAUTION
Indicates a potentially hazardous situation which, if not correctly
followed, could result in moderate or minor injury.
NOTICE
Indicates a potentially hazardous situation which, if not correctly
followed, could result in equipment failure to run, or property damage.
NOTE
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).
2
1 Safety Precautions
Before beginning your journey, please read these safety precautions in User Manual carefully.
1.1 Personnel Safety
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.
1.2 The PV Inverter Protection
NOTICE
As soon as receiving the PV inverter, please check if it is damaged
during its transportation. If yes, please contact your dealer immediately.
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.
1.3 Installation Safety
NOTICE
Please read the User Manual carefully before installing the PV inverter;
warranty or liability will be void from Senergy if damage is caused by
installation faults.
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)
3
1.4 Electrical Connections
DANGER
Before installing the inverter, check all electrical ports to ensure no
damage and no short circuit. Otherwise personal casualty and/or fire
will occur.
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.
1.5 Operating and Commissioning
DANGER
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.
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.
1.6 Maintenance
DANGER
Power OFF all electrical terminals before the inverter maintenance;
strictly comply with the safety precautions in this document when
operating the inverter.
4
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
NOTICE
To avoid any other unforeseeable risk, contact Senergy immediately, if
there is any issue found during operation.
5
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 Functional Models
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.
WARNING
The inverter is transformerless. Add an isolation transformer before
grounding the positive/ negative terminal of PV modules (like Thin
Film module) for operation.
WARNING
Do not connect PV modules in parallel to several PV inverters for
operation.
2.1.2 Model Description
Figure 2.1 shows a model number of the inverter, using 6K as an example.
6K
Power class code
Figure 2.1 Model number descriptions
2.2 Network Application
2.2.1 Grid-tied PV Power Systems
This series inverter applies to grid-tied PV power systems for industrial/commercial rooftops,
fishing/farmers light complementary power generation systems, and large ground-based power
stations. Generally, these series inverters are used to low-voltage grid-tied PV power system,
as shown in Figure 2.2.
6
PV strings
inverter
AC Distribution Unit
low-voltage power grid
Figure 2.2 a low-voltage grid-tied PV power system
These series inverters support TN-S, TN-C, and TT power grids as shown in Figure 2.3.
Inverter
Inverter
TN-S
Inverter
TN-C
Inverter
TN-C-S
TT
Figure 2.3 Power grids supported by these series inverters
2.3 Outline and Dimensions
2.3.1 Dimensions
Figure 2.4 shows the dimensions of the inverter as follows:
385
490
185
Figure 2.4 The dimensions of the inverter by front & lateral views (unit: mm)
7
2.3.2 Outline
Figures 2.5 to 2.7 shows the outline of inverter as follows:
1. PV Indicator
2. Grid Indicator
3. COM Indicator
4. Warning Indicator
5. LCD (optional)
Figure 2.5 The front view and amplification effect of LED indicator area
Mounting bracket
Figure 2.6 The rear view of this series inverter
1. DC isolation breaker
2. PV Strings connectors
3. Communications interface
4. RS485
5. AC OUTPUT CONNECTORS
6. External Protection Ground interface
7. Vent valve
Figure 2.7 The bottom view of this series inverter
8
2.4 Working Process
2.4.1 Basic Principle Description
6K/8K/10K/12K/15K receive inputs from PV strings through DC switch and surge protection in
order: there are 2 groups of PV strings input terminals on DC input terminal of 6K/8K/10K; there
are 3 groups of PV strings input terminals on 12K/15K with the 2nd and 3rd routes terminals
merging into one independent MPPT. Then the inputs are grouped into two MPPT routes inside
the inverter to track the maximum power point of the PV strings. These two MPPT power is then
converted into DC Bus which is then converted to AC power through an inverter circuit. Finally
the converted AC power is fed to the Power grid through the inverter. Surge protection and EMI
filer are supported on both the DC and AC sides to reduce electromagnetic interference.
2.4.2 Circuit Diagrams
Figure 2.8 shows the circuit diagram for 6K/8K/10K.
AC EMI filter
invert circuit
DC EMI filter
MPPT
route1
MPPT
route2
relay
PV DC
Switch
DC surge protector
L1
L2
L3
N
PE
AC surge protector
Figure 2.8 circuit diagram
9
Figure 2.9 shows the circuit diagram for 12K/15K.
MPPT
route2
AC EMI filter
invert circuit
DC EMI filter
MPPT
route1
L1
L2
L3
N
PE
relay
PV DC
Switch
DC surge protector
AC surge protector
Figure 2.9 circuit diagram
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.
Modes
Description
Standby
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.
Operating
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.
Shutdown
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.
Table 2.1 Working modes description
10
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 -40℃ to +70℃ 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.
> 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.
11
4 Installation
DANGER
Do not install the inverter on flammable building materials or in an
area that stores flammable or explosive materials.
CAUTION
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.
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.
Items
Deliverables
A
The inverter
B
Rear panel
C
File package
D
DC terminal connector group
E
F
screw
Expansion screw
(reserved for tighteningthe support and rear panel)
Figures 4.1 The deliverables: The inverter and its fittings
12
NOTICE
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.
Figure 4.2 Moving the inverter
CAUTION
The inverter is relatively heavy! To prevent device damage and personal
injury, arrange two people to move the inverter and handle with care.
CAUTION
>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.
13
4.3.2 Compliance and Safety Symbols
Safety symbol
10mins
Description
Electrical shock!
There are residual voltages in the PV inverter. It needs 10 minutes
to finish discharge.
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.
Type Approved
Safety
Regular
Production
Surveillance
ZERTIFIZIERT
The PV inverter is compliant with TUV.
2000000000
4.4 Installation Requirements
According to installation position, one kind of physical installation is described below in detail:
wall-mounting.
4.4.1 Determining the Installation Position
Basic Requirements
a.
b.
The inverter is protected to IP65 and can be installed indoors or outdoors.
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.
Installation Environment Requirements
a.
The ambient temperature must be below 50℃ which ensures the inverter’s optimal
operation and extends its service life.
14
b.
The inverter must be installed in a well ventilated environment to ensure good heat dissipation.
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.
≥1000
Awning
≥500
the front view
the lateral view
Figure 4.3 Installation environment with awning (unit: mm)
Carrier Requirements
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.
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.
15
>500
>1000
>200
>200
>600
the lateral view
the front view
Figure 4.4 Installation Space Requirements (unit: mm)
c. When installing multiple inverters, 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.
200
200
Figure 4.5 Installation along the same line (unit: mm)
16
100
300
Figure 4.6 Installation in triangle mode (unit: mm)
200
1000
Figure 4.7 Installation in stacked mode (unit: mm)
NOTICE
The clearance between multiple inverters must be increased to
ensure proper heat dissipation when they are installed in a hot area.
17
4.4.2 Installation Mode Requirements
Install the inverter upright or at a maximum back tilt of 15 degrees to facilitate heat dissipation.
Below are some correct / wrong installation modes, as shown in Figures 4.8&4.9.
The correct installation mode
upright
back tilt
Figures 4.8 The correct installation mode
The wrong installation mode
Horizontally
Upside-down
Figure 4.9 The wrong installation modes
NOTICE
The wrong installation will lead to failure of the inverter operation.
4.5 Wall-mounting the Inverter
Before installing, you have to prepare expansion bolts (specification: M6*60; Quantity: 3)
Step 1 Move out the rear panel from packing case.
Step 2 Determine the positions for drilling holes (as shown in Figure 4.10) using the rear panel.
18
65
320
233
125
160
365
70.5
Φ8
Figure 4.10 Positions determining (unit: mm)
Step 3 Level the hole position using a level, and mark the hole positions using a marker,
as shown in Figure 4.11.
a level
Figure 4.11 marking the hole positions
DANGER
While drilling the hole on the wall, ensure no damage on the
electric wire and /or water pipe inside the wall.
19
Step 4 Drill holes using a hammer drill and install expansion bolts, as shown in Figure 4.12.
Ø8,Depth of the hole：60-65mm
Drilling a hole on wall using a hammer drill
Installing the expansion bolt
Figure 4.12 Drilling a hole and installing expansion bolts (unit: mm)
Step 5 Align the rear panel with the holes, insert expansion bolts into the holes through the real
panel, and tighten the expansion bolts to a torque of 3 N·m using a torque wrench, as shown in
Figure 4.13.
Spec: M6; the required torque is 3 N·m
Tighten the screw into the expansion bolt
Figure 4.13 Securing a rear panel
20
Step 6 Mount the inverter on the rear panel and secure it as shown in Figure 4.14.
Figure 4.14 Mounting the inverter
Step 7 Lock the inverter with the rear panel and ensure that the inverter in secured by checking
for resistance when a slight pull is applied, as shown in Figure 4.15.
Specification：M6 ；The required torque：3 N·m
Figure 4.15 Securing the inverter
21
5 Electrical Connections
Before performing any electrical connections, ensure that both DC
DANGER
and AC Switches are OFF. Otherwise, fatal injury can occur due to
the high voltage caused from AC and DC cables.
CAUTION
Grounding the PV Strings needs below prerequisites:
An isolation transformer must be installed on the AC side of each inverter;
Ensure that the neutral wire of the isolation transformer must be disconnected from the
PGND cable.
One isolation transformer is with one PV inverter: do not install a single isolation transformer
for multiple inverters; otherwise, circulating current generated by the inverters will lead to
operation failure.
Select Isolation SET on the SE Touch APP, and set in Input Grounded, With TF.
5.1 Connecting Protection Ground (PGND) Cables
5.1.1 Preparation
The ground cable and OT terminals have been prepared.
a. Ground cable: Outdoor copper-core cables with a cross sectional area of 6 mm2 or more are
recommended.
b. OT terminal: OT6~4.
OT 6 ~ 4
Key parameter
Product series code
Terminal product series code
Good grounding for the inverter helps resist the impact of surge
NOTE
voltage and improve the EMI performance. Connect the PGND cable
before connecting the AC power cables, DC power cables, and
communications cables.
22
NOTE
It is recommended that the ground cable be connected to a nearby
ground position. For a system with multiple inverters connected in
parallel, connect the ground points of all inverters to ensure
equipotential connections.
5.1.2 Wiring Procedures
Step 1 Remove an appropriate length of the insulation layer from the PGND cable using a wire
Stripper; the length is a little bit longer than that of OT terminal’s crimping end by 2mm~3mm,
as shown in Figure 5.1.
Specification：OT6-4
Figure 5.1 Stripped length (unit: mm)
Step 2 Insert the exposed core wires into the crimping areas of the OT terminal and crimp them
using hydraulic pliers, as shown in Figure 5.2.
Figure 5.2 Crimping a cable (unit: mm)
Step 3 Secure the PGND cable (done by step 1 & 2) using the ground bolts and tighten the bolts
to a torque of 1.2 N·m using a socket wrench. Ensure that the PE wire is grounding well and
impedance between earth wire and neutral wire is no more than 10 Ω, as shown in Figure 5.3.
Figure 5.3 Securing the PGND cable
23
5.2 Connecting AC Output Cables
5.2.1 Preparation
The AC power cable and AC terminals have been prepared with below requirements.
a. AC power cable: Outdoor multi-strand copper-core cables are recommended. Single strand
cables or aluminum cable is forbidden for inverter output terminal. Table 5.1 describes the
specifications.
Cable Outer Diameter (mm)
Cross-sectional Area (mm )
2
Cable
Cable type
Range
Recommended Value
Range
AC cable
multi-core
outdoor cable
4~6
4
11~18
DC cable
common PV
cables in the
industry
(model: PV1-F)
2.5~4
4
4~5
External
PGND
cable
multi-core
outdoor cable
4~6
6
NA
Table 5.1 AC output cable specifications (recommended)
Model
Crosssectional Area
6K
8K
10K
12K
15K
4mm2
53m
40m
30m
25m
20m
6mm2
80m
58m
47m
39m
30m
Table 5.2 Cable Max length at AC terminal
b. AC wiring terminals: Leak-protective switch is not recommended in this system; if there is a
must, please install a model B switch with no less than 300mA current leakage. Neutral wire
sharing is forbidden for multi leak-protective switches in system, or tripping operation will be
resulted.
24
WARNING
An independent three-phase circuit breaker must be installed on the AC
side of each inverter to ensure that the inverter can be safely disconnected
from the power grid.
WARNING
Do not connect loads between the AC output terminals of the inverter
and circuit breaker.
5.2.2 Procedure of Connecting AC Cables
Step 1 Remove an appropriate length of the jacket and insulation layer from the AC output cable
using a wire stripper, as shown in Figure 5.4.
L2=10mm~12mm
70(recommend)
Figure 5.4 Stripped length (unit: mm)
Step 2 Crimp Euro type terminals using special crimping tool, shown in Figure 5.5.
Figure 5.5 Crimping Euro type terminals
Step 3 Insert AC output wire through waterproof terminal block to AC connector reserving
appreciate wiring length shown in Figure 5.6.
Figure 5.6 Dealing AC output cable
25
Step 4 Connect the AC output cable to L1, L2, L3, N, and E on the AC terminal block, tighten
them using screw driver and the required torque is 1.5 N·m, shown as in Figure 5.7.
Figure 5.7 Tightening AC cable
Step 5 Aligning with the hole position on the AC terminal cover, use a torque wrench to tighten
the locking cap to a torque of 1.2 N·m, as shown in Figure 5.8.
Figure 5.8 Tightening AC wiring cover
Step 6 Use a torque wrench to tighten the locking cap on the AC cable to a torque of 5 N·m,
as shown in Figure 5.8.
26
5.3 Connecting the PV Strings
DANGER
PV Strings connection needs below prerequisites; otherwise, an
electrical shock can occur.
PV modules generate electric energy when exposed to sunlight and can create an electrical
shock hazard. Therefore, when connecting the PV modules, shield them with opaque cloth.
Before connecting DC input power cables, ensure that the voltage on the DC side is within
the safe range and that the DC SWITCH on the inverter is OFF. Otherwise, high voltage
may result in electric shock.
When the inverter is grid-tied, it is not allowed to maintain DC input power cables, such as
connect or disconnect a string or a module in a string. Only after the inverter enters in
shutdown mode, it is allowable for preceding DC input power cables maintenance.
WARNING
Grounding the PV Strings needs below prerequisites; otherwise, a
fire can occur.
PV modules connected in series in each PV string must be of the same specifications.
The maximum open-circuit voltage of each PV string must be always lower than or equal
to its permitted range.
The maximum short circuit current of each PV string must be always lower than or equal
to its permitted range.
The positive and negative terminals of PV modules must be connected to the positive and
negative DC input terminals of the inverter respectively.
During the installation of PV strings and the inverter, the positive or negative terminals of
PV strings cannot be connected with short circuit.
27
5.3.1 Preparation
PV Strings DC input cable and PV Strings connectors have been prepared with below
requirements:
a.Route connecting for the installation of PV strings and the inverter is shown in Table 5.3
Input Route
Inverter model
Number of Input Route
1
Connected to any route
2
Connected to routes 1 & 2
3
Connected to routes 1,2 & 3
6K/8K/10K/12K/15K
Not applicable for 6K/8K/10K
Table 5.3 Route connecting for the installation of PV strings and the inverter
b. DC input cables of PV Strings: Table 5.4 lists the recommended outdoor copper-core DC
input cable specifications.
Cross-sectional Area (mm ) Cable Outer Diameter (mm)
2
Cable Type
Inverter model
Common PV cables in
the industry (model:
PV1-F)
6K/8K/10K
12K/15K
Range
Recommended Value
Range
2.5~4
4
4~5
Table 5.4 Recommended DC input cable recommended specifications
c. Connectors of PV Strings: Positive and negative DC input connectors are used, as shown in
Figure 5.9 and Figure 5.10.
PC
1
2
the insulation layer
locking nut
1
the insulation layer
Figure 5.9 Positive connector compositions
2
locking nut
Figure 5.10 Negative connector compositions
Positive and negative metal connectors are packed with positive and
NOTE
negative connectors respectively when shipped out. After unpacking,
keep the positive and negative ones separate to avoid confusion.
28
Procedures of connecting the PV Strings
Step 1 Remove an appropriate length of the insulation layer from the positive and negative
power cables using a wire stripper, as shown in below Figure.
Positive metal connector
Negative metal connector
Figure 5.11 Removing insulation layer for DC cable (unit: mm)
Step 2 Insert the exposed areas of the positive and negative power cables into the metal
terminals of the positive and negative connectors respectively and crimp them using a crimping
tool, as shown in Figure 5.12.
Figure 5.12 Crimping a metal connector
Step 3 Insert the crimped positive and negative power cables into the corresponding positive
and negative connectors until a "click" sound is heard, as shown in Figure 5.13.
PC
Figure 5.13 Connecting positive and negative connectors
29
Step 4 Tighten the locking nuts on the positive and negative connectors using a removal
wrench, as shown in Figure 5.14.
Figure 5.14 Locking connectors
Step 5 Measure the voltage of every route Strings using a multimeter. Ensure that the polarities
of the DC input power cables are correct, as shown in Figure 5.15.
800 00
MAXMIN
Hz %
REL
CP
RANGE
!
hFE
10A MAX
COM
!
AMPHENOL
FUSED
!
FUSED
Figure 5.15 Checking the voltage of every route Strings
Step 6 Insert the positive and negative connectors into their corresponding terminals of the
CP
inverter until a "click" sound is heard, as shown in Figure 5.16.
PV+
PV-
Figure 5.16 Connecting to the inverter
Step 7 After connecting the PV strings, ensure that all connectors are in position by checking
for resistance when a slight pull is applied.
30
5.4 Connecting Communications Cables
5.4.1 Communications Mode Description
You can use the following communications modes to implement communications: Bluetooth,
WIFI, GPRS, and RS485, all of which are described as follows.
Bluetooth Module
You can turn on the Bluetooth function of the mobile phone, and set parameters and
monitor data of the inverter through the mobile APP SE Touch.
For details about operation, refer to APP User Manual. APP User Manual is available for
free from www.senergytec.com.
WIFI & GPRS & RS485 Modules
Following figure show inverter’s interface to connect WIFI, GPRS and RS485 accessory, please
refer user manual of accessory for connecting method and its setting.
Module
Function description
WIFI
WIFI module implements communication with Cloud server through
wireless network to monitor PV inverter's data status.
For more details, refer to WIFI Product Application Manual.
GPRS
GPRS module implements communication with Cloud server through
cellular to monitor PV inverter's data status.
For more details, refer to GPRS Product Application Manual.
RS485
RS485 switching module monitors PV inverter's data status through
collecting and uploading data to Cloud server.
For more details, refer to RS485 switching Product Application Manual.
NOTE
You can choose and buy WIFI / GPRS / RS485 communication
modules from Senergy.
WIFI / GPRS / SE Touch User Manual are available from
http://www.senergytec.com.
Table 5.5 WIFI & GPRS & RS485 Modules Description
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RS485 communications mode (for single inverter)
You can connect RS485 communications module to inverter for monitoring in two ways:
connecting to single inverter and to multiple inverters. Figure 5.17 demonstrates
connection to single inverter to implement RS485 communications.
RS485 OUT
RS485 IN
Inverter
Router/Modem
Data Logger
Cloud Sever
Terminal Device
Figure 5.17 RS485 communications mode for a single inverter
RS485 communications mode (for multiple inverters)
OUT
IN
OUT
Inverter
IN
OUT
Data Logger
Router/Modem
Cloud Sever
RS485 IN
RS485 OUT
Terminal Device
Figure 5.18 RS485 communications for multiple inverters
If multiple inverters are connected, note the following:
NOTE
1) No need for re-setting Modbus address and the address can be
allocated automatically if V1000 data logger (manufactured by
Senergytec) is used. Otherwise, you need to re-set Modbus
address manually through SE Touch APP if other brand data
logger is used. For details, refer to SE Touch Product Manual.
2) Turn RS485 Resistance to ON from the dial switch of the inverters
on the end of the chain.
3) Ensure that the appropriate length of communications cable
between every two inverters is less than 200m and communications
cable must be separated from other power cables to avoid
communications interference.
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5.4.2 Connecting RS485 Communications Cables
Step 1 Remove an appropriate length of the insulation layer from the cable using a wire
stripper, as shown in Figure 5.19.
8mm
≤60mm
Figure 5.19 Stripping an RS485 communications cable (unit: mm)
Step 2 Remove the RS485 screws at the inverter bottom to remove the metal plate.
Step 3 Take RS485 cable out of accessory kit, and remove the locking caps from the 485 IN
and 485 OUT waterproof cable connectors. Route RS485 cables through waterproof
cable connectors and reserve appreciate wire length for wiring to the inverter.
Step 4 Connect RS485 differential positive and negative signal of data logger to terminal 1A
and 1B of inverter, and connect terminal 2A and 2B of the inverter to terminal 1A and
1B of another inverter. Figure 5.20.
Figure 5.20 RS485 Terminal block connection
Step 5 Connect RS485 male terminal with its female terminal, Tighten the locking caps to a
torque of 8 N·m as well as waterproof cable connectors.
To prevent corrosion, apply silica gel or fireproof mud to the terminal
NOTE
or interface after connecting external PGND cables, AC cables,
RS485 port, and Ethernet port.
33
5.4.3 Setting RS485 Communications Address
Step 1 Input http://www.senergytec.com in your mobile phone browser and click APP to
download SE Touch, which is also available by scanning below QR code. And then login SE
Touch and register an account for your inverter.
Figure 5.21 QR Code for downloading SE Touch APP
Step 2 Click the Extension key, and select Setting in the prompt manual, as shown in Figure 5.22.
Figure 5.22 APP homepage setting
Step 3 Check the Modbus address in Figure 5.23, the default address is 1, long click to revise
the address and save it, the inverter at same RS485 bus must be set a unique address.
Figure 5.23 Check the Modbus address
34
Step 4 You can set Mach Resistance of the end of multi-RS485 connection chain, as showed
in Figure 5.24.
Figure 5.24 Setting Mach Resistances
5.5 Installation Verification
Check the following items after the inverter is installed according to Table 5.6.
1. No other objects put on the PV inverter.
2. All screws, especially the screws used for electrical connections, are tightened
3. The PV inverter is installed correctly and securely.
4. Ground, AC, DC, and Communications cables are connected tightly/correctly and securely.
5. Check there is no open circuit or short-circuits at AC and DC terminals using multimeter.
6. Waterproof connectors at AC terminals and RS485 ports are plugged with waterproof
plugs tightly.
7. Covers at AC terminals are tightened.
8. Idle terminals are sealed.
9. All safety warning symbols are intact and complete on the inverter.
Table 5.6 Self-check items after installation
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6 System Operation
6.1 Powering ON the Inverter
Step 1: Switch ON the AC circuit breaker.
Step 2: Set the DC SWITCH of the inverter to ON.
Step 3: Observe statuses of LED indicator lights on the inverter according to Table 7.2.
NOTE
When LED status lights display the inverter has entered
grid-connecting, it means the inverter is operating well. Any query
during operating the PV inverter, call your dealer.
6.2 Powering OFF the Inverter
Step 1: Switch off the circuit breaker at AC terminal.
Step 2: Set the DC SWITCH to OFF.
WARNING
After the inverter powers off, the remaining electricity and heat may
still cause electrical shock and body burns. Please only begin
servicing the inverter ten minutes after the power-off.
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7 User Interface
Display screen of inverter is composed of LED indicator and LCD (LCD is optional for some
models of inverter). LED indicator includes PV Indicator, Grid Indicator, COM Indicator, and
Warning Indicator.
1. PV indicator
2. Grid indicator
3. COM indicator
4. Warning indicator
5. LCD (optional)
LED indicator Status
on
Description
Voltage of PV strings meets the requirements for inverter
grid-connecting to generate power.
PV Indicator
blink
Voltage of PV strings can’t meet the requirements for inverter
grid-connecting to generate power.
blink
Power grid abnormal, and can’t meet the requirements for
inverter grid-connecting to generate power.
When grid-on, the blink (every cycle last 30s) of Grid Indicator
means loading amounts: quantity of blink means power size, and
after that the Indicator keeps ON.
Grid
Indicator
on
When less than 20% rated power, blink one time;
20%~40% rated power, blink twice every 30s;
40%~60% rated power, blink three times every 30s;
60%~80% rated power, blink four times every 30s;
80%~100% rated power, blink five times every 30s.
blink
COM
Indicator
Warning
Indicator
off
on/blink
off
Communications data transmission is underway.
No external communications is connected or no communications
data transmission.
Refer LED status in warning table
No warning
Table 7.1 LED indicator
37
LCD Screen
COM
Warning
Date
Status
Meter
Output
1) COM
When WIFI/GPRS/Bluetooth is transferring data, icon
will be ON, while no data transmission,
the icon will be off after 10s. When RS485 is transferring data, icon
will be ON, while no data
transmission, the icon will be off after 10s.
2) Warning
When warning is triggered, icon
(A)/
(b)/
will be illuminated: from left to right the first bit could be
(C), it stands for warning type, and the second bit is warning code, please refer
to warning code in table 7.2 for details.
3) Date
When external communications is normal and time zone is set correctly, the built-in clock of
inverter will be synchronized with server’s time.
4) Status
Icon
stands for PV strings; when inverter is standby status, MPPT voltage of the PV string
will be displayed in Meter zone.
Icon
stands for grid; when voltage and frequency of power grid is in normal range, the icon
keeps on, or else, it blinks; when there is no voltage, the icon will be off.
Icon
stands for energy flow; when inverter is in normal status, the icon will be on, or else it
will be off.
38
5) Meter
Normal status: today and total energy, MPPT
voltage and current are showed in turn.
Standby status: counter down value before
inverter start up.
Any status: setting parameters via APP, the
screen keep for 5 seconds.
6) Output
Normal status: output power, grid voltage
and current are showed in turn.
View Inverter status
The inverter operation status can be obtained from observing LED indicator status. For more
details, refer to Table 7.1 LED indicator status.
View and Set Inverter running data
The inverter operation data can be obtained from SE Touch, mobile phone APP downloaded
through Bluetooth communications. For more details, refer to SE Touch Manual.
NOTE
You can view&set data through the inverter APP, SE Touch. For
details about operation, refer to SE Touch User Manual. SE Touch
User Manual is available for free from http://www.senergytec.com.
Warning
PV
Grid
COM
Warning
code indicator indicator indicator indicator
Normal status
Starting up
WLAN/WI-FI/RS485 communication
PV normal
Grid over voltage
A0
Grid under voltage
A1
39
Grid absent
A2
Grid over frequency
A3
Grid under frequency
A4
Grid unbalance
A6
PV over voltage
B0
PV under voltage
B4
Weak radiation
B5
Strings abnormal
B3
Inverter over temperature
C5
Fan abnormal
C8
Insulation resistance abnormal
B1
Leakage current abnormal
B2
Strings reverse
B7
Control power abnormal
C0
DC bias current abnormal
C2
Inverter relay abnormal
C3
Leakage current HCT abnormal
C6
System fault
C7
DC link voltage unbalance
C9
DC link over voltage
CA
Internal Communications Fault
CB
Software version incompatibility
CC
EEPROM fault
CD
Sampling inconsistency
CE
Invert circuit abnormal
CF
Boost circuit abnormal
CG
Table 7.2 LED indicator status for common fault of the inverter
Note: ● means light ON, ○ light off
blink
40
keep original status.
8 Maintenance
WARNING
Before maintaining and commissioning inverter and its peripheral
distribution unit, switch off all the charged terminals of the inverter
and wait at least 10 minutes after the inverter is powered off.
8.1 Routine Maintenance
Maintain
content
Check Item
Check Content
inverter output
status
Statistically maintain the status of
electrical yield, and remotely monitor
its abnormal status.
PV inverter
Check periodically that the heat sink is Clean periodically
free from dust and blockage.
the heat sink.
cleaning
PV inverter
running
status
PV inverter
Electrical
Connections
Check that the inverter is not damaged
or deformed.
Check for normal sound emitted during
inverter operation.
Check and ensure that all inverter
communications is running well.
Check that AC, DC, and communications
cables are securely connected;
Check that PGND cables are securely
connected;
Check that cables are intact and there
are not wire aging;
NA
Weekly
yearly
If there is any
abnormal
phenomenon,
replace the
monthly
relevant parts.
If there is any
abnormal
phenomenon,
replace the cable
or re-connect it.
Table 8.1 Maintenance checklist and interval
41
Maintenance
Interval
Semiannually
8.2 Inverter warning and exception handling
When the inverter has an exception, its basic common warning and exception handling methods
are shown in the table 8.2.
Alarm Name
Causes
Grid
Over Voltage
Grid
Under Voltage
Over
Frequency
The grid voltage
exceeds its
allowable range.
Under
Frequency
PV Over
Voltage
Measures Recommended
1. If the alarm occurs accidentally, possibly the
power grid is abnormal accidentally. No extra
action is needed.
2. If the alarm occurs repeatedly, contact the local
power station. After receiving approval of the local
power bureau, revise the electrical protection parameters
setting on the inverter through SE Touch APP.
3. If the alarm persists for a long time, check whether
the AC circuit breaker / AC terminals is disconnected
or not, or if the grid has a power outage.
PV modules input
voltage exceeds
Check the number of PV modules and adjust it if need.
the inverter’s
allowable range.
PV Under
Voltage
Insulation
Resistance
Abnormal
PV modules input 1. When sunlight intensity weakens, PV modules
voltage is under voltage decreases. No action is needed.
2. If such phenomena occur when sunlight intensity
the inverter’s
does not weaken, check if there is short circuit, open
defaulted
protection value. circuit etc. in the PV strings.
A short circuit
exists between
PV strings and
1. Check the insulation resistance against the ground
for the PV strings. If a short circuit has occurred,
protection ground. rectify the fault.
PV strings are
2. If the insulation resistance against the ground is
installed in a
less than the default value in a rainy environment, set
long-term moist
environment.
Insulation resistance protection on SE Touch.
42
The insulation
resistance against
Residual
Current
Abnormal
PV Strings
Abnormal
PV Strings
Reverse
the ground at the
input side
decreases
1. If the alarm occurs accidentally, possibly the external
circuits are abnormal accidentally. The inverter
automatically recovers to the normal operating status
during the inverter after the fault is rectified.
2. If the alarm occurs repeatedly or lasts a long time,
operation, which
causes excessively check whether the insulation resistance against the
ground of PC strings is too low.
high residual
current.
PV strings have
been shielded for
a long time.
PV strings are
deteriorating.
The cables of PV
strings are
connected
Check whether the cables of PV strings are correctly
connected. If they are connected reversely, reconnect
reversely during the the cables.
inverter installation.
BUS Under
Voltage
Abnormal internal
energy control
BUS Over Voltage imbalance has
been triggered by
Invert Module
the PV Strings/grid
Fault
sharp change of
BOOST Fault
1. Check whether the PV string is shielded.
2. If the PV string is clean and not shielded, check
whether the PV modules are aging or deteriorated.
1. If the alarm occurs occasionally, the inverter can
automatically recover to the normal operating status
after the fault is rectified.
2. If the alarm occurs repeatedly, contact your dealer
for technical support.
working conditions
EEPROM
EEPROM Fault
Component
damaged
Zero power
generation and
Yellow alarm light Communications
outage
illuminating in
remote monitor
Replace the monitoring board.
If modem or other data logger is used, please reboot
it; if still does not work after rebooting, contact your
dealer.
system
43
remote monitor
displays zero
power generation
Communications
outage
remote monitor
Output switch
displays no output
tripping
voltage
Inverter off grid
If modem or other data logger is used, please reboot
it; if still does not work after rebooting, contact your
dealer.
Check if DC switch is damaged, and if not, switch it to
ON. If it still doesn’t work, contact your dealer.
1. Power grid fault; 1. Wait till power is restored;
2. DC switch
2. Turn DC switch to ON, and if DC switch trips a lot,
contact your dealer.
tripping
Table 8.2 Common troubleshooting measures
NOTE
If you cannot clear the preceding alarm according the measures
recommended, contact your dealer timely.
8.3 Removing the Inverter
Perform the following procedures to remove the inverter:
Step 1: Disconnect all cables from the inverter, including communications cables, DC input
power cables, AC output power cables, and PGND cables, as shown in Figure 8.1.
Figure 8.1 Removing DC input connector
Notes:
When removing DC input connector, insert the removal wrench to the bayonet, press the
wrench down, and take out the connector carefully.
44
Step 2: Remove the inverter from the rear panel.
Step 3: Remove the rear panel.
WARNING
Before removing DC input connector, double check DC input switch
is turned to OFF to avoid inverter damage and personal injury.
45
9 Quality Guarantee
9.1 Quality Terms
1) Where otherwise agreed to in a contract, quality warranty period of the inverter is 60 months
2) As for the PV inverter which is defective or damaged within its quality warranty period,
Senergy .shall repair or replace it for free.
3) The defective / damaged PV inverter replaced must be returned.
9.2 Liability Waiver
Warranty or liability will be void if damage is caused from below operations / situations. If
customer asks for maintenance service, Senergy can, at its discretions, provide paid service.
1) The warranty period expired;
2) The damage caused during transit;
3) The damage caused by man;
4) The damage caused by force majeure including, but not restricted to the following:
earthquake, flood, fire, explosion, debris flow etc.
5) Operation in adverse environments beyond that described in the User Manual;
6) Any installation and operation environment beyond the relevant national standards;
7) Any installing, reconfiguring, or using faulty;
8) Any revising the product or modifying its software code without authorization;
9) Maintenance faulty caused by the technician personnel unauthorized by Sernegy;
10) Any operation ignoring the safety precautions stipulated in the User Manual.
46
10 Disposal of the Inverter
The PV inverter and its packing case are made from environmental protection material. If the
inverter service life has expired, do NOT cut it away with household garbage; dispose the
inverter in accordance with local rules for disposal of electrical equipment waste.
47
11 Technical Specifications
48
Notes:
1) Grid power voltage range can be set according to national voltage standards;
2) Power grid frequency range can be set according to national grid standards
3) The preceding technical specifications are subject to change without prior notice. The
listed specifications are for your reference only.
49