DASS Tech SOLEAF DSP-3320i-ODS Instruction manual

DASSTECH Solar Photovoltaic
DSP-3320i-ODS
DSP-3325i-ODS
DSP-3333i-ODS
Version 1.1
www.dasstech.com
Customer Ser vice Center
Main Phone of Headquarter
(FAX)
E-mail
The specifications of the product are subject to change without notice due to quality improvement, etc.
Headquarter: 109, Yangcheongsongdae-gil, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungcheongbuk-do,
28118, Republic of Korea (in Science Park of Ochgang)
http://www.dasstech.com
Ver 1.1
Manual for Use and Installation
DASS Tech Co., Ltd.
1588-7468
043-218-5670
043-218-5671
[e-mail]

Notice
The product , service and features that you purchased are bound by DASS TECH's commercial
contract and terms,The product, service and features(or part of them) described in this
document may not be in your purchase or usage range. DASS TECH does not declare or
guarantee any content in this document except there are other contractual stipulation.
Save these instructions!
This manual must be considered as an integral part of the equipment, and must be available
at all times to everyone who interacts with the equipment. The manual must always
accompany the equipment, even when it is transferred to another user or field.
Copyright Declaration
The copyright of this manual belongs to DASS Tech Co., Ltd Any corporation or
individual should not plagiarize, partially copy or fully copy it (including software, etc.),
and no reproduction or distribution of it in any form or by any means. All rights
reserved. DASS TECH reserves the right of final interpretation. This manual is subject to
change according to user’s or customer’s feedback.
I
Preface
Please read the product manual carefully before installation, operation or maintenance. This
manual contains important safety instructions and installation instructions that must be
followed during installation and maintenance of the equipment.
This manual is for qualified person (support person, service person are qualified mentioned in
this manual).
Outline
Scope
Target Group
Symbols Used
This manual provides safety operation information and uses the symbol in order to ensure
personal and property security and use the inverter efficiently when operating the inverter.
You must understand these emphasized information to avoid the personal injury and
property loss. Please read the following symbols which used in this manual carefully.
This product manual describes the assembly, installation, commissioning, and maintenance of
the following inverters.
DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
Keep this manual where it will be accessible at all times.
Danger indicates a hazardous situation which, if not avoided, will result
in death or serious injury.
Warning indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
Caution indicates a hazardous situation, if not avoided, could result in
minor or moderate injury.
Attention indicates there are potential risks. If fail to prevent, may lead
to equipment cannot run normally or property damage.
Note provides tips that are valuable for the optimal operation of the
product. It can solve your problem and save your time if you read it
carefuly.
Danger
Warning
Caution
Attention
Note
II
DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
User manual
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1 Basic safety information
III IV
Table of contents
1
1
1.1
1.2 Symbols and signs
Safety instructions
3
Preface
II
5
5
2 Product characteristics
2.1
2.2 Function description
2.3 Protection modules
2.4 Efficiency and derating curve
Product identification
10
13
13
3 Installation
3.1
3.2 Checking Before Installation
3.3 Tools
3.4 Determining the Installation Position
3.5 Moving the DASS TECH inverters
3.6 Installing the DASS TECH inverters
Installation Process
15
16
16
18
20
21
22
4 Electrical Connections
4.1
4.2 Connecting PGND Cables
4.3 Connecting AC Output Power Cables
4.4 Connecting Communications Cables
4.5 Connecting DC Input Power Cables
4.6 Safety check
Electrical connection
24
25
25
27
29
33
39
5 Commissioning of inverter
5.1
5.2 Start inverter
Safety inspection before commissioning
40
40
40
41
41
6 Operation interface
6.1
6.2 Standard Interface
6.3 Main Interface
Operation and Display Panel
42
44
55
55
7
Trouble shooting and maintenance
7.1
7.2 Maintenance
Trouble shooting
59
8 Decommissioning
8.1
8.2 Package
8.3 Storage
8.4 Disposal
Decommissioning steps
60
60
60
60
60
9 Technical data
9.1
9.2 Output parameter (AC)
9.3 Efficiency, Safety and Protection
9.4 General Data
Input parameter (DC)
61
61
62
62
63
10 Quality Assurance 64
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Basic safety information
1
Outlines of this chapter
safety instruction
It mainly introduce the safety instruction when install and operate the . DASS TECH inverters
1.1 Safety instructions
If you have any question or problem when you read the following information,
please contact DASS Tech Co., Ltd.
Note
Symbols and signs
It mainly introduce the safety symbols on . DASS TECH inverters
DASS TECH inverters must be installed according to the national and local grid standard and
law. Read and understand the instruction of this manual ,and be familiar with relevant safety
symbols in the paragraph, then start to install and debug the equipment.According to the
national and state requirements, before connect the grid ,you must get power department
permission, and perform the operation only by qualified electrical engineer.Before installing
and maintaining the equipment, you should cut off the high voltage application of PV array.
You can also open the switch of Solar Array Combiner to cut off the high voltage. Otherwise,
serious injury may be caused.
Qualified persons
The customer must make sure the operator have the necessary skill and training to do his/her
job. Staff in charge of using and maintaining the equipment must be skilled, aware and
mature for the described tasks and must have the reliability to correctly interpret what is
described in the manual. For safety reason only a qualified electrician, who has received
training and / or has demonstrated skills and knowledge in construction and in operation of
this unit, can install this inverter. DASS Tech Co., Ltd does not take any responsibility for the
property destruction and personal injury because of any incorrect use.
Assembly situation requirements
Please install and start inverter according to the following sections. Put the inverter in
appropriate bearing capacity objects(such as wall and components and so on), to ensure that
inverter vertical placed. Choose suitable place for installing electrical equipment. And assure
enough fire exit space, convenience for maintenance. Maintain proper ventilation, and
ensure that have the enough air cooling cycle.
Transport requirements
If you find packing problems that may cause the damage of the inverter, or find any visible
damage, please immediately notice the responsible transportation company. You can ask
solar equipment installation contractor or DASS Tech Co., Ltd for help if necessary. Transport
of the equipment, especially by road, must be carried out with by suitable ways and means
for protecting the components (in particular, the electronic components) from violent shocks,
humidity, vibration, etc.
Electric connection
Please comply with all the current electrical regulations about accident prevention in dealing
with the current inverter.
Before the electrical connection, make sure to use opaque material to cover the
PV modules or to disconnect PV array DC switch. Exposure to the sun, PV array
will produce a dangerous voltage!
Danger
Warning
Attention
All installation accomplished only by professional electrical engineer!
Only get permission by the local power department and complete all electrical
connection by professional electrical engineer then connect inverter into grid!
must be trained;
Completely read the manual operation and understand relevant matters.
Electrical installation and maintenance shall be conducted by qualified
electrician and shall comply with national wiring rules.
1 2
Body sign and protection
There are warring signs on the body of DASS TECH inverters ,which has important safety
operation information, it is forbidden to damage these signs.
There is nameplate on side body of DASS TECH inverters, which has important information of
product parameters, it is forbidden to damage these signs.
Please read the safety notice in this manual carefully, if not it may cause serious
injure or death.
,
DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
User manual
DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
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Danger
Attention
Touching the power grid or the terminal of equipment may lead to die of electric
shock or fire!
Don’t touch the terminal or conductor which connect to the power circuit;
Pay attention to anything about grid connection and security document.
Signs on the inverter
There are some symbols which are related to security on the inverter. Please read and
understand the content of the symbols, and then start the installation.
IP65
Operation
Maintenance and repair
EMC / noise level of inverter
Danger
Attention
Disconnected with the PV components array and electricity grid before any
repair work;
After turn off AC breaker and DC switch for 5 minutes later, the maintenance
or repair of the inverter can be carried out!
Some internal components will be very hot when inverter is working. Please wear
protective gloves!
Inverter should work again after removing any faults. If you need any repair
work, please contact with the local authorized service center;
Can’t open the internal components of inverter without authorized. DASS
Tech Co., Ltd does not take any responsibility for the losses from that.
Electromagnetic compatibility (EMC) refers to that one electrical equipment functions in a
given electromagnetic environment without any trouble or error, and impose no
unacceptable effect upon the environment. Therefore, EMC represents the quality characters
of electrical equipment.
The inherent noise-immune character: immunity to internal electrical noise.
External noise immunity: immunity to electromagnetic noise in external system.
Noise emission level: influence of electromagnetic emission upon environment.
Danger
Electromagnetic radiation from inverter may be harmful to health!
Please keep away from the inverter more than 20 cm when inverter is working.
1.2 Symbols and signs
There is residual voltage in the inverter! Before open the equipment,
operator should wait for five minutes to ensure the capacitance discharge
completely.
Be careful of high voltage.
Be careful of high temperature.
Conformity with CE.
Point of connection for grounding.
This indicates the allowed temperature range.
This indicates the degree of protection of the equipment according to
IEC standard 70-1 (EN 60529 June 1997).
Positive pole and negative pole of the input voltage (DC).
3 4
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Transformer
L1
L2
L3
PE
IT
Product characteristics
2
2.1 Product identification
DASS TECH inverter
(DC) coming from a photovoltaic generator (PV) into an alternating electric current (AC)
Suitable for being fed into the national grid.
is a multi-string inverter designed to: transform a direct electric current
The inverter can only be used with photovoltaic modules for on-grid PV power generation. It
can not be used as other or extra purposes, Device manufacture or supplier does not have
responsibility to any loss caused by other purpose usage. And customer should take
responsibility to risk and loss of other purpose usage.Customer should follow this manual for
PV on-grid power generation usage. The input of inverter can only be PV panel ,if user usess
DC source or battery to test the inverer ,it may cause device damage , product damage or
human injure, device manufacture/supplier does not have responsibility for these.
DASS TECH inverter
For the TT type of electricity grid，the voltage between neutral and earth should be less than
30V.
are compatible with TN-S、TN-C、TN-C-S、TT、IT grid configurations。
Components of the inverter:
Intended grid types:
Outlines of this chapter
Product identification
It introduces the field of use, and how to indentify different types of DASS TECH inverter.
Function description
It introduces how the inverter works and the function modules inside.
Protection modules
It introduce the protection modules in the inverter.
Field of use
Figure2-1 PV Grid-tied System
Figure2-2 Overview of the grid configurations
Figure2-3 Two parts of the inverter
1 power converter part
5 6
DASS TECH inverter
Transformer
L1
L2
L3
N
PE
PE
Transformer
L1
L2
L3
PEN
PE
Transformer
L1
L2
L3
N
PE
PE
Transformer
L1
L2
L3
N
PE
TN-S TN-C TN-C-S TT
1
666 mm
512 mm
Efficiency and derate curve It introduces efficiency curve and input/output derating curve.
DASS TECH inverter DASS TECH inverter DASS TECH inverter
DASS TECH inverter
DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
User manual
DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
User manual

The specific models of multi-string inverter that this manual is about are divided into four
groups according to the maximum output power (DSP 3320i-ODS, DSP 3325i-ODS, DSP
3333i-ODS).
7 8
Figure2-4 Components of bottom view(1)
The choice of model of inverter must be made by a qualified technician who knows about
the installation conditions, Designer chooses the proper inverter model according to
installation site ,enviroment and whole system integration.
Inverter type identification:
DSP 3320i ODS
Overall dimensions: L×W×H=666mm×512mm×254mm。
Isolation: transformerless
Rated output power
Inverter name
Figure2-8 Front view and left view dimensions
1 Cabinet 2. Human Interface board.
254mm
1
2
666 mm
512 mm
7
2
8
35
4
16
P E N T S R
1. Anti-condensation valve
2. DC switch
3. DC positive poles connecters
4. WIFI/GPRS Interference
5. RS485 input cable gland/Dry contact
6. AC cable gland
7. Fan
8. DC Negative poles connecters
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9 10
Identification labels of the equipment：
The labels must NOT be hidden with
objects and extraneous parts (rags,
boxes, equipment, etc.); they must
be cleaned regularly and kept visible
at all times.
1. Heat sink 2. Bracket
Figure2-9 Back view and Bracket dimensions
512.0mm
1
48mm
459mm
336mm
348.3mm
14mm
10mm
10mm
135mm135mm
2
2.2 Function description
DC power generated by PV array is filtered through input board
before entering into Power board. Input board also offer functions such as insulation
impedance detection and input DC voltage / current detection. DC power is converted to AC
power by Power board. AC power is filtered through Output board then AC power is fed into
the grid. Output board also offer functions such as grid voltage / output current detection,
GFCI and output isolation relay. Control board provides the auxiliary power, controls the
operation state of inverter and shows the operation status by Display board. Display board
displays fault code when inverter is in abnormal operation conditions. At the same time,
Control board can trigger the relay so as to protect the internal components.
string detection board and
Operating Principle
Operating Principle
The string detection board detects the input voltage / current, analyses the operating status of each
PV string and alerts the user that a maintenance required if a problem occurs in the PV string;
The DC switch disconnects internal circuits from the DC input to facilitate maintenance;
The input and output electromagnetic interference (EMI) filters filter out the EMI inside the DASS
TECH inverter to ensure that the DASS TECH inverter meets electromagnetic compatibility
requirements;
The Input Board detects the insulation impedance of the PV array and ensures the maximum output
power of the PV system by measuring the voltages & currents of PV array and tracking the
maximum power point (MPPT);
The DC-AC conversion circuit converts DC power into AC power and then the AC power is fed
into the electric grid. The AC output power quality meets the requirements of the electric grid;
The output isolation relay isolates the inverter from the electric grid when the grid or the inverter is
faulty.
The LC filter filters out the high-frequency components from the AC output of DASS TECH
inverter to ensure that the AC output meets electric grid requirements;
The Communication Board enables the inverter to communicate via RS485, WIFI(optional), user
can access all the operating data via the web browser(PC) and APP(ios & android).
DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
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DSP 3320i-ODS, DSP 3325i-ODS, DSP 3333i-ODS
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Figure2-10 Electrical block diagram
11 12
MASTER DSP SLAVE DSP
DC SWITCH
Anti-graft
protection
Anti-graft protection
OVP
DC SPDIII
OVP
DC SPDIII
IN1A(-) IN1B(-)
IN1C(-)
MPPT1
DC/DC
INPUT EMI FILTER
MPPT
DC/DC
OUTPUT EMI FILTER
AC SPDIII
EARTH
PE L1 L2 L3 N
AC Output terminal station
PE L1 L2 L3 N
L1 L2 L3 N
L1 L2 L3 N1
RLY
EARTH
INVERTER
DC/AC
IN2
IN1
+ - + -
+
-
+
+
-
-
+ - + -
IN1 IN2
IN1A(+) IN1B(+)
IN1C(+)
IN1A(-) IN1B(-)
IN1C(-)
IN2A(+) IN2B(+)
IN2C(+)
IN2A(-) IN2B(-)
IN2C(-)
IN1(+) IN1(-) IN2(-) IN2(+)
IN1(+) IN1(-) IN2(-) IN2(+)
DC CABLE GLAND
PV CONNECTOR
DC Input terminal station
IN1(+) IN1(-) IN1(-) IN2(+)
IN1(+) IN1(-) IN1(-) IN2(+)
SD Card
RS485
WIFI
(OPT)
RS485
MARK MARK MARK
Upper part of the case Lower part of the case OPTIONAL
Machine typesS0/S1/S2/S3/S4/S5
REMOTE CONTROL ALARM
+T/R -T/R GND GND +R N.C N.O C
IN1A(+) IN1B(+)
IN1C(+)
IN2A(+) IN2B(+)
IN2C(+)
IN2A(-) IN2B(-)
IN2C(-)
A. Configurable relay
B.1 Remote switching on/off
Function module
The inverter has a configurable switching relay that can be used in various operating
conditions set in the dedicated menu. A typical application example is the closing of the
contact when an alarm occurs.
B. Energy management unit
This control can be used to switch the inverter on/off through an external (remote) control.
B.2 Feeding reactive power into the grid
The inverter is able to produce reactive power and can therefore feed it into the grid through the setting of the
phase shift factor. Feed-in management can be controlled directly by the grid company through a dedicated
RS485 serial interface.
B.3 Limiting the active power fed into the grid
The inverter, if enabled can limit the amount of active power fed into the grid by the inverter to the desired value
(expressed as a percentage).
B.4 Self power reduction when grid over frequency
When the grid frequency is over limited value, inverter will reduce output power which do good to the grid
stability.
B.5 Power reduction due to environmental conditions, input output voltage
The power reduction value and the inverter temperature at which it occurs depend on the ambient temperature
and on many operating para-meters. Example: input voltage, grid voltage and power available from the
photovoltaic field. The inverter can therefore reduce the power during certain periods of the day and according to
the value of these parameters.
The inverter may be monitored remotely through an advanced communications system based on an RS485 serial
interface, or remotely via the WIFI.
C. Data transmission
SD card is used for updating the firmware.
D. Software update
E. Monitoring string inputs
The inverter can monitor and display the voltage and current of each individual string input. It also checks the
status of the strings and generates a warning in the event of a fault.
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C. Grid monitoring
Continuous monitoring of the grid voltage to ensure the voltage and frequency values stay within operating
limits.
D. Inverter internal device protection
The inverter has all kinds of internal protection to protect the device inside when grid or input DC side have
abnormal situation.
E. Ground fault protection
This inverter must be used with panels connected with “floating” connections, that is, with positive and negative
terminals without ground connections，or it may damage the inverter. An advanced ground fault protection
circuit continuously monitors the ground connection and disconnects the inverter when a ground fault is detected.
The ground fault condition is indicated by a red LED on the front panel.
2.4 Efficiency and derating curve
Efficiency curve
Input voltage derating curve
13 14
2.3 Protection modules
A. Anti-islanding
In the event of a local grid outage by the electricity company, or when the equipment is switched off for
maintenance operations, the inverter must be physically disconnected safely, to ensure protection of people
working on the grid, all in accordance with the relevant national standards and laws. To prevent possible
islanding, the inverter is equipped with an automatic protective disconnection system called “Anti-Islanding”.
B. RCMU
DASS TECH inverter are equipped with a redundancy current device to monitor ground leakage current sensitive
to all components of both direct and alternating current. When the steady-state leakage current is larger than
300mA or instant leakage current is higher than 30mA/60mA /150mA, inverter will disconnect the grid in
different time delay.
Output voltage derating curve
Vpv=450V
Vpv=600V
Vpv=800V
5% 10% 20% 30% 40% 50% 60% 75% 80% 90% 100%
% of Rated Output Power
86
88
90
92
94
96
98
100
Efficiency[%]
250 350 440 500 600 700 850 900 950
0
10000
15000
20000
25000
30000
35000
40000
Output Power vs Input Voltage
Output Power(W)
Vin(V)
Output Power vs Grid Voltage
4000
8000
12000
16000
20000
24000
40000
28000
32000
36000
180 190 200 210 220
Output Power(W)
0230 240
Vgrid(V)
250 270 280260 320300
290 310
DASS TECH inverter outputs 230V AC/50Hz
DASS TECH inverter outputs 230V AC/50Hz
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After unpacking the , check whether deliverables are intact and complete. If any
damage is found or any component is missed, contact the dealer.
Check the list in the table 3-1.
inverter
Installation
3
3.1 Installation Process
3.1 Installation Process
Figure3-1 Installation flowchart
Start
Outlines of this chapter
This topic describes how to install the DASS TECH inverter.
Installation notes
Caution
Danger
Attention
Do not install the DASS TECH inverter on flammable building materials.
Do not store the DASS TECH inverter in areas with flammable or explosive
materials.
Do not install the DASS TECH inverter in places prone to body contact because
the DASS TECH inverter shelf and heat sinks become hot during the DASS
TECH inverter operation.
Take the DASS TECH inverter weight into consideration when transporting
and moving the DASS TECH inverter.
Install the DASS TECH inverter in an appropriate position and surface.
Assign at least two persons to install the DASS TECH inverter.
This topic describes the process for installing the DASS TECH inverter.
3.2 Checking Before Installation
Before unpacking, check that the packing materials are intact. After unpacking, check that the
deliverables are complete and intact.
3.3 Tools
Prepare tools required for installation and electrical connections.
3.4 Determining the Installation Position
Determine an appropriate position for installing inverter.
3.5 Moving the inverter
This topic describes how to move inverter to the installation position horizontally.
3.6 Installing the inverter
Before installing inverter, secure the shipped rear panel to the wall. Then secure inverter to
the rear panel by using hexagon screws.
Check before
installation
Prepare installation
tools
Determine the
installation position
Moving the inverter
Installation the rear
panel
Installation the
inverter
End
3.2 Checking Before Installation
Checking Outer Packing Materials
Checking Deliverables
Packing materials and components may be damaged during transportation. Therefore, check
the outer packing materials before installing the inverter. Checking the surface of packing
materials for damage, such as holes and cracks. If any damage is found, do not unpack the
inverter and contact the dealer as soon as possible. You are advised to remove the packing
materials within 24 hours before installing the inverter.
15 16
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No.
1
Pictures
2
3
4
5
6
7
8
9
10
11
1PCS
1PCS
DASS TECH inverter
Rear panel
DC+ input terminal
DC- input terminal
Metal terminals secured to DC+ input
power cables
M6 Hexagon screws
M8*80 Expansion bolts used to secure the
rear panel to the wall
Manual
The warranty card
Certificate
Prepare tools required for installation and electrical connections.
Table3-1 shows the components and mechanical parts that should be delivered
Quantity Description
2PCS
6PCS
1PCS
1PCS
1PCS
Metal terminals secured to DC- input
power cables
3.3 Tools
Table3-1 Shows the components and mechanical parts that should be delivered
Tool Function
Hammer drill
Adjustable wrench
Flat-head screwdriver
Socket wrench
Rubber mallet
Removal tool
Diagonal pliers
Wire stripper
With a drill bit of Φ8.0
Model
Used to drill holes on the wall
Used to tighten expansion bolts
Used to tighten or loosen screws when
installing AC power cables.
Fix rear panel and ground bolts
Used to hammer expansion bolts into
holes
Used to remove DC connectors from the
DASS TECH inverter.
Used to remove AC connectors from
the DASS TECH inverter.
Note: The torque screwdriver and flat-head
screwdriver are alternative.
Used to cut and tighten cable ties
Used to peel cable jackets
With an open end of larger
than or greater than 32 mm
N/A
M6
N/A
N/A
N/A
N/A
17 18
R 45 crimping tool
JUsed to prepare RJ45 connectors for
Communications cables
N/A
DSP 3320i-ODS 4PCS
DSP 3325i-ODS 6PCS
DSP 3333i-ODS 6PCS
5mm
DSP 3320i-ODS 4PCS
DSP 3325i-ODS 6PCS
DSP 3333i-ODS 6PCS
DSP 3320i-ODS 4PCS
DSP 3325i-ODS 6PCS
DSP 3333i-ODS 6PCS
DSP 3320i-ODS 4PCS
DSP 3325i-ODS 6PCS
DSP 3333i-ODS 6PCS
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max 15º
80
cm
50 cm 50 cm
50
cm
OK OK NO OK
OK OK NO
NO
NO
OK NO
NO NO
Measuring tape
Minimum installation distance for single DASS TECH inverter
Determine an appropriate position for installing the DASS TECH inverter.
Comply with the following requirements when determining the installation position:
Tool Model Function
0-180º
Cable cutter
Crimping tools
Vacuum cleaner
Multimeter
Marker
Level
ESD gloves
Safety goggles
Anti-dust respirator
Used to measure distances
Used to mark signs
Used to ensure that the rear panel is
properly installed
Operators wear ESD gloves when
installing equipment.
Punch operator wearing
Punch operator wearing
Used to cut power cables
Used to crimp power cables
Used to clean up dusts after drilling
holes
Used to check grounding
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
3.4 Determining the Installation Position
Figure 3-2 Installation position requirements
19 20
R 45
J2PCS
Notice
Installation position has following requirements:
Installation position can not hinder power cutting off.
Installation wall should have enough load bearing capacity
Installation position should avoid child contact
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Figure3-4 Moving the DASS TECH inverter (2)
Step 2 Lift the DASS TECH inverter from the packing case and move it to the installation
position.
End
Step 1 To determine the position for drilling holes, level hole positions, and then mark the
hole position by using a marker, use the hammer dril to dril hole on the wall. Keeping the
hammer perpendicular to the wall, do not shake when drilling, so as not to damage the walls.
If the aperture errors, need to reposition.
Many DASS TECH inverter installation
This topic describes how to move the DASS TECH inverter to the installation position
horizontally
Step 1 Opening the packing, insert hands into the slots on both sides of the DASS TECH
inverter and hold the handles, as shown in Figure 3-3 and Figure 3-4. Two persons are
required to move the DASS TECH inverter.
Figure 3-3 Moving the DASS TECH inverter (1)
3.5 Moving the DASS TECH inverter
Procedure
Attention
To prevent device damag and personal injury, keep balance when moving the
DASS TECH inverter because the DASS TECH inverter is heavy.
Do not put the DASS TECH inverter with its wiring terminals contacting the
floor because the power ports and signal ports are not designed to support the
weight of the DASS TECH inverter. Place the DASS TECH inverter horizontally.
When placing the DASS TECH inverter on the floor, put foam or paper under
the DASS TECH inverter to protect its shell.
3.6 Installing the DASS TECH inverter
Step 2 The expansion screw is vertically inserted into the hole, pay attention to expanding
screw insertion depth (not too shallow).
Step 3 Putting the rear panel on the wall, the rear panel is fixed by the nuts.
Step 1 Step 2 Step 3
21 22
300mm
100mm
1000mm
200mm
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NOTE:
Before performing electrical connections, ensure that the DC switch is OFF.Since the stored
electrical charge remains in a capacitor long after the DC switch is turned OFF. So it’s
necessary to wait for at least 5 minutes for the capacitor to be electrically discharged.
This topic describes the DASS TECH inverter electrical connections. Read this part carefully
before connecting cables.
4.1 Electrical connection
This topic describes the electrical connection process.
4.2 Connecting PGND Cables
Connect inverter to the grounding electrode using protection ground (PGND) cables for
grounding purposes.
4.3 Connecting AC Output Power Cables
Connect inverter to the AC power distribution frame (PDF) or electrical grid using AC output
power cables after obtaining approval from local electrical grid operator.
4.4 Connecting Communication Cables
This topic describes the functions of WIFI and RS485 ports and the method of connecting
WIFI and RS485 communication cables.
4.6 Safety check
Before start the inverter, comply with the safety precautions and check AC、DC connections.
4.5 Connecting DC Input Power Cables
Connect inverter to PV arrays using DC input power cables.
Step 4 Putting the inverter hook on the rear panel.
Step 5 Using an M6 screw back and inverter bottom fastening, to ensure safety.
Step 6 Putting the rear panel and inverter to lock together, In order to ensure the safety (the
user can select lock according to the actual situation).
Step 4 Step 5
Step 6
4Electrical Connections
Outlines of this chapter
PV modules generate electric energy before exposed to sunlight and can create
an electrical shock hazard. Therefore, before connecting DC input power cable,
cover PV modules using opaque cloth.
DASS TECH inverter has 2 MPP trackers, all PV modules connected to the same
MPPT should have similar rated electrical characteristics (including Isc, Voc, Im,
Vm, Pm and temperature coefficients), have the same number of series
connected PV modules and be all in the same orientation (azimuth and tilt
angle).
Installation and maintenance of inverter, must be operated by professional
electrical engineer.
Attention
Danger
Note
23 24
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Prerequisites:
The PGND cables are prepared (8 AWG outdoor power cables are recommended for
grounding purposes).
Procedure:
Step 1 Remove the insulation layer with an appropriate length using a wire stripper, as shown
in Figure 4-3.
L2=L1+(2-3)mm
L1
Note：L2 is 2 to 3mm longer than L1
4.1 Electrical connection
Start
4.2 Connecting PGND Cables
Connect inverter to the grounding electrode using protection ground (PGND) cables for
grounding purposes.
Note:
Good grounding for the DASS TECH inverter can help resist the impact of the surge voltage and improve the
EMI performance. First connect the PGND cable before connecting the AC power cable, DC power cable, and
communication cable.
For the system with one DASS TECH inverter, connect the PGND cable to the ground. For the system with
multiple DASS TECH inverter, connect the PGND cables of all DASS TECH inverter to the grounding
electrode using equipotential bonding.
If the installation location is near the ground, first connect the PGND cable to the ground before installing the
DASS TECH inverter on the wall.
Step 2 Insert the exposed core wires into the OT terminal and crimp them by using a crimping
tool, as shown in Figure 4-4.OT terminal is recommended The PE cable is better larger than
6m2.
L3<2mm
L4<1.5mm
Note 1: L3 is the length between the insulation layer of the ground cable and the crimped part.L4 is the distance between the
crimped part and core wires protruding from the crimped part.
Note 2: The cavity formed after crimping the conductor crimp strip shall wrap the core wires completely. The core wires shall
contact the terminal closely.
Step 3 Install the crimped OT terminal, flat washer, and spring washer on the M5 welded
stud, and tighten the nut to a torque of 5 N.m using a socket wrench.
To enhance the anti-corrosion performance of the ground terminals, apply silica gel on them after connecting the
ground cable.
Figure4-1 Shows the flowchart for connecting cables to the DASS TECH inverter
Connect PGND Cables Connect AC Output power
Cables
End Connect DC Input power
Cables
Connect Communication
Cables
The inverter is transformerless, Requires The positive pole and the negativepole
of the PV array are not grounded, Otherwise it will cause inverter failure, In the
PV power generation system, all non current carrying metal parts(such as:
Bracket, Junction box shell, inverter shell) should be connected to earth.
Attention
Figure4-2 Ground terminal composition
1. OT Terminal 2. M6 Ground Connection terminal
Note:
Figure4-4 Preparing a ground cable (2)
Figure4-3 Preparing a ground cable (1)
25 26
2
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P E NTSR
PE NTSR
55(PE)
12
55(PE)
12
AC side installation procedure
DASS TECH inverter is a three-phase output inverter, strictly comply with local grid-
connection requirements and safety standards.
Step 1 Open the AC connector cover.
Figure4-5 Open the cover schematic diagram
Step 2 Remove the insulation layer of an appropriate length according to figure 4-6, then
insert the AC output cable though the PG waterproof cable gland.
Figure4-6 AC Output Cable schematic diagram
Context
All the AC output cables used for the inverters are outdoor five-core cables. To facilitate the
installation, use flexible cables . Table 4-1 lists the recommended specifications for the cables
and the breakers.
4.3 Connecting AC Output Power Cables
Connect the DASS TECH inverter to the AC power distribution frame (PDF) or electrical grid
using AC output power cables.
The impedance of grid-tied should be less than 0.85ohm. To
insure reliable anti-islanding function,user should choose PV
specified cable to make sure the power loss less than 1% of rated
power.The grid-tied point should be less than 150m. Check the
table 4-2 for AC cable specification and maximum length for each
model.
Multi core copper wire mm²≥10
Multi core copper wire
Caution
It is not allowed for several inverters to use the same circuit breaker.
It is not allowed to connect loads between inverter and circuit breaker.
Table4-1
Note: For the sake of safety, please make sure to use correctly sized cables, otherwise the current makes the cable overheat or
overload, even cause a fire.
The leakage current of micro breaker should be 100mA≤ Ifn≤300mA,0.1S.
Step 3 Connecting the AC output power cable: The AC output cable(R,S,T,N and PE) is
connected to the terminal block, as shown in figure 4-7.
Figure4-7 Cable connection schematic diagram
Table4-2
27 28
Cable(Copper)
Breaker
DSP 3320i-ODS
10mm²
≥
40A
12mm²
≥
63A
Type
30
49
27
44
10
13
The cable
cross-sectional
area(mm²)
The maximum length(m)
DSP 3333i-ODS
DSP 3320i-ODS DSP 3333i-ODS
DSP 3325i-ODS
10mm²
≥
50A
27
44
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1. WIFI/GPRS Interface RS485 port2.
12
Zoom in communication port
P E N T S R
Connecting Communications Port
DASS TECH inverter has 3 communication ports: 2 RS485 ports, 1 WiFi/GPRS port, as shown
below
Figure 4-8 WiFi/GPRS, RS485 position
By the RS485 communication line, connecting DASS TECH inverter to communication
equipment (such as data acquisition, PC terminal).
You are recommended to use 24 AWG outdoor shielded network cables with the internal
resistance less than or equal to 1.5 ohms/10 m and external diameter of 4.5 mm to 7.5 mm
as RS485 communications cables.
A waterproof RJ45 connector has six parts: plug, screw nut, seals, housing, sealing plug and
cable screw nut , as shown as follow.
1 2 3 4 5 6
When routing communications cables, ensure that communications cables are separated from power cables and
away from interference sources to prevent communication interruptions.
Connecting RS485 Communications Cables
Figure 4 9 Waterproof RJ45 connector composition-
1. Plug 2. Screw nut 3. Seals 4. Housing 5. Sealing Plug 6. Cable Screw nut
Step 1 Remove the insulation layer of an appropriate length from the shielded network cable
using a wire stripper.
Step 2 Open DASS TECH inverter lower cover and insert the shielded network cable into the
cable screw nut, seals, screw nut.
Step 3 Connect the stripped network cable to corresponding pins on the plug, as shown as
follow.
18
18
TOP
FRONT
R S485 A -, RS485 differential signal +
R S485 A -, RS485 differential signal +
R S485 A -, RS485 differential signal +
ColorNo.
White and orange
1
2
3
4
5
6
7
8
R S485 B-, RS485 differential signal-
R S485 B-, RS485 differential signal-
R S485 B-, RS485 differential signal-
NC
NC
Procedure
Function
Orange
White and green
Blue
White and blue
Green
White and brown
Brown
Figure 4 11 RS485 Connecting Communications Cables(1)-
29 30
4.4 Connecting Communications Cables
DRM0
USB
RS-485
R 485/USB
S
R 485
S
Radio ripple
control receiver
Publlc Grid
DRM0
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31 32
Step 4 Crystal plug with RJ45 crimping tool.
Step 5 Insert the plug into the RS485 port on the DASS TECH inverter.
Step 6 Insert sealing plug into housing, and tighten the screw nut.
Follow-up Procedure
To remove an RJ45 connector from DASS TECH inverter, remove the cable screw nut, press
the clip on the RJ45 connector, and then pull out the shielded RJ45 connector.
End
Figure 4 12 RS485 Connecting Communications Cables(2)-
Figure 4 13 RS485 Connecting Communications Cables(3)-
Step 1 To prepare the appropriate cable. The front of a wire stripping to will be in accordance
with the following picture size, and then through the PG waterproof joint.
Procedure
Figure 4 19 Relay Connection (1)-
Step 2 Insert sealing plug into housing, and tighten the screw nut.
Step 3 The cable stripped to the corresponding stem node hole.
Figure 4 20 Relay Connection (2)-
Figure 4 21 Connection (3)- Relay
8mm pullout
20(PE)
8
20
8
Zoom in communication port
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4.5 Connecting DC Input Power Cables
Connect the DASS TECH inverter to PV arrays over DC input power cables.
Input mode selection： has 2 MPPT, The two MPPT can run
independently, but also can be operated in parallel, According to the system design,
the user can choose the mode of MPPT operation.
DASS TECH inverter
MPPT voltage range
According to the inverter type, choose the inverter accessories (cables, fuse holder, fuse, breaker etc.), DASS TECH
inverter with PV array should be excellent performance, reliable quality. The open circuit voltage of PV must be
less than Maximum DC input voltage of DASS TECH inverter, The output voltage of the solar array must be
consistent with the MPPT voltage range.
Note
Table4-5 MPPT voltage range
Max. input voltage
33 34
1100 Vdc
230~960 Vdc
Type
If the two MPPT panels is independent, the input mode should be set as "independent
mode".
The setting method is introduced at chapter 6.3.
Independent mode (default):
If the two MPPT panels is paralleled together by combiner, the input mode should be set as
"parallel mode".
The setting method is introduced at chapter 6.3.
Parallel mode :
DSP 3320i-ODS DSP 3333i-ODS
Note
Caution
Danger
PV modules generate electric energy when exposed to sunlight and can
create an electrical shock hazard. Therefore, when connecting DC input
power cable, cover PV modules by using opaque cloth.
Before performing electrical connections, ensure that voltages of the DC
cables should be within the safe voltage range, that is, lower than 60 V
DC, and the DC SWITCH is OFF. Otherwise, the high voltage may result
in fatal danger.
PV modules connected in series in each PV array are of the same specifications.
The open-circuit voltage of each PV array is always lower than or equal to 1100 V DC.
The open-circuit voltage of each PV array is always lower than or equal to 15 A DC.
The output power of each PV array is always less than or equal to the maximum input
power of the DASS TECH inverter.
The positive and negative terminals of PV arrays connect to the positive and negative
DC input terminals respectively.
Ensure that the following conditions are met. Otherwise, fire accident may occur.
If the DASS TECH inverter connects to the power grid directly, ensure
that the PV arrays are not grounded.
If the DC voltage is a non-zero value between the positive terminal of PV
arrays and the ground, the PV arrays are subject to insulation faults.
Rectify the fault before connecting cables.
During PV array and DASS TECH inverter installation, the positive or
negative terminals of PV arrays may be grounded if power cables are
not properly installed or routed. In this case, an DC short circuit may
occur and damage the DASS TECH inverter.
If the PV arrays need to be grounded, install a three-phase four-wire
isolation transformer on the output side and disable the ISO detection
function by referring to 6.2.10 Setting Isolation Parameters. If an
isolation transformer is not installed, the DASS TECH inverter may be
damaged.
DC connection between inverter and string panel should be specified PV cable. Line voltage
drop should be less than 2% from junction box to inverter.Inverter is recommended to be
installed on or near PV panel bracket , which can save cable and reduce DC loss.
Note
Check polarity of PV array, to ensure the correct wiring of PV array;
Please don't put the positive or negative of the PV array connect to
earth.
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