KStar KSG-10K User manual

201402 ︳ Ver 1.0
User Manual
Solar InverterSolar Inverter
KSG-10K/12K5/15K/17K/20KKSG-10K/12K5/15K/17K/20K

Installation and Opertion Manual 1
Table of Contents
1. Introduction for Signs .................................................................... 4
2. Introduction.................................................................................... 5
2.1 Preface..................................................................................... 5
2.2 PV Grid-connected Generating System .................................. 5
2.3 How to Use This Manual ........................................................ 5
3. Safety Instructions ......................................................................... 6
4. Overall Introduction....................................................................... 7
4.1 Circuit Structure ...................................................................... 7
4.2 Description for External Interface........................................... 8
5. System Operation........................................................................... 9
5.1 System Mode........................................................................... 9
5.2 Grid-connected Operation....................................................... 9
5.3 System Shutdown................................................................... 11
5.4 Error and Alarm...................................................................... 11
5.5 Type of system fault and trouble shooting ............................. 13
6. Human-machine Interface............................................................. 15
6.1 LCD controlled panel............................................................. 15
6.2 Networking for monitoring .................................................... 16
6.3 WLAN (optional) ................................................................... 17
6.4 Remote control ....................................................................... 17
7. LCD Operation Menu ................................................................... 18
7.1 Initialization ........................................................................... 18
7.2 Major cycle menu................................................................... 18
7.3 User interface ......................................................................... 20
7.4 Setting .................................................................................... 20

Installation and Opertion Manual 2
7.4.1 Input mode...................................................................... 21
7.4.2 Standard for electric network ......................................... 21
7.4.3 Remote CTRL................................................................. 21
7.4.4 Working parameters........................................................ 22
7.4.4.1 Starting-up voltage.................................................. 22
7.4.4.2 Starting-up timelag ................................................. 22
7.4.4.3 Low voltage of electric network ............................. 23
7.4.4.4 High voltage of electric network ............................ 23
7.4.4.5 Low frequency of electric network......................... 23
7.4.4.6 High frequency of electric network ........................ 24
7.4.4.7 Please starting-up again .......................................... 24
7.4.5 485 address ..................................................................... 24
7.4.6 485 baudrate ................................................................... 25
7.4.7 Display language ............................................................ 25
7.4.8 LCD backlight ................................................................ 25
7.4.9 Date/time ........................................................................ 26
7.4.10 History clearing ............................................................ 26
7.4.11 Password setting ........................................................... 27
7.5 Inquiry .................................................................................... 27
7.5.1 INV MODEL.................................................................. 28
7.5.2 MODEL SN.................................................................... 28
7.5.3 Firmware......................................................................... 28
7.5.4 RECORD........................................................................ 29
7.6 Statistics ................................................................................. 30
7.6.1 Time statistics ................................................................. 30
7.6.2 Times of paralleling in.................................................... 30
7.6.3 Power peak ..................................................................... 31

Installation and Opertion Manual 3
7.6.4 Generated energy of that day.......................................... 31
7.6.5 Generated energy of that week ....................................... 31
7.6.6 Generated energy of that month ..................................... 31
7.6.7 Generated energy of that year......................................... 32
7.6.8 Gross generation............................................................. 32
8. Installation..................................................................................... 33
8.1 Overview ................................................................................ 33
8.2 Mechanical installation .......................................................... 34
8.2.1 Installation introductions................................................ 34
8.2.2 Mechanical dimension.................................................... 34
8.2.3 Packing .......................................................................... 36
8.2.4 Installation of Inverter .................................................... 36
8.2.5 Installation Location....................................................... 37
8.2.6 Installation Procedure..................................................... 37
8.2.7 Ambient requirement...................................................... 39
8.3 Electric connection................................................................. 39
8.3.1 Requirement for electric installation .............................. 39
8.3.2 Wire for alternating current connection.......................... 40
8.3.3 Wire for direct current connection.................................. 41
8.3.4 Wire for communication connection .............................. 42
8.4 Starting and closing................................................................ 43
9. Technical Data............................................................................... 44
10. Appendix .................................................................................... 45
10.1 Quality assurance ................................................................. 45

Installation and Opertion Manual 4
1. Introduction for Signs
In order to make a better use of this manual, please read the following
sign explanation carefully.
Warning!
This sign indicates that it may cause danger to safety of
users and/or attentions or instructions for possible serious
damage to hardware.
Instruction!
This sign indicates important attentions required for good
operation of the system.

Installation and Opertion Manual 5
2. Introduction
2.1 Preface
Dear users, thank you for using photovoltaic grid-connected inverter
products manufactured by Kstar which is experienced in development
of photovoltaic grid-connected generating sets. We hope this product
can meet your demands and welcome you to put forward more
suggestions on performance and functions of this product.
2.2 PV Grid-connected Generating System
The photovoltaic grid-connected generating system is composed
of solar cell module, grid-connected inverter, metering devices and
power distribution system (as shown in Figure 1). The solar energy
is converted to DC electric power through solar cell module, which
is further converted to sine-wave current synchronous with grid
frequency and phase via grid-connected inverter. Such electric power
is then fed into power grid. The photovoltaic grid-connected inverter
is the key equipment in solar power system.
Figure 1: Application of Photovoltaic Grid-Connected Inverter in
Photovoltaic Generating System.
2.3 How to Use This Manual
This manual aims to provide detailed product information and
installation & use instructions for users of KSG-10K/12K5/15K/
17K/20K photovoltaic grid-connected inverter manufactured by this

Installation and Opertion Manual 6
company. Please read this manual carefully prior to use of this product
and store it properly in a place where it is convenient for installation,
operation and available for maintenance personnel.
3. Safety Instructions
Please read this manual carefully prior to installation. This►
company assumes no responsibility for quality assurance upon
equipment damage due to installation failing to follow instructions
in this manual.
All operations and wiring shall be conducted by professional►
electrical or mechanical engineer.
Do not move other parts inside the machine case except the►
binding post during installation.
All electrical installations must conform to local standards for►
electrical installation.
Please contact with local appointed personnel for system►
installation and maintenance if this equipment requires the
maintenance.
Use of this equipment for grid-connected power generation must►
be approved by local power supply departments.
When the photovoltaic array is installed in the day, it shall be►
covered with lightproof materials; otherwise the array end will
subject to high voltage under exposure of sunlight, thus causing
personal risk.
Warning! Ensure that the input DC voltage does not
exceed 900V since higher input voltage may damage
this equipment permanently and causing other losses,
under which circumstance, this company assumes no
responsibility for quality assurance and joint responsibility

Installation and Opertion Manual 7
4. Overall Introduction
4.1 Circuit Structure
Figure 2 shows main circuit of KSG-10K/12K5/15K/17K/20K
inverter by which the direct current is input via three-phase full-
bridge circuit and transformed into sine-wave current through filter
and output to power grid. To make the photovoltaic array generate
in maximum power, the new type power devices are adopted for this
machine and the advanced MPPT algorithm is used at the DC side.
Figure 2: Main Circuit of KSG-10K/12K5/15K/17K/20K Inverter

Installation and Opertion Manual 8
4.2 Description for External Interface
Figure 3: Interface of KSG-10K/12K5/15K/17K/20K Inverter
Instructions for Interface
■
1: DC Input: DC input terminal, connected to positive and negative►
electrode input of photovoltaic array respectively.
2: AC OUTPUT:AC output, spaced by three phases AC switch and►
connected to L1, L2, L3, N and GND of three-phase grid.
3: Communication Interface RS232: connected with PC via joint►
RS232.
4: Communication Interface RS485: wire RS485A/B is connected►
with PC via converter RS485/ RS232.(When two or more inverters
are in parallel communication, 2P DIP switch beside RJ45 of the
last one should be “ON”. Or else, it may cause communication
interruption.That 2P DIP switch is on, means connecting a 120Ω
communication terminal resistance between the R/T + and R/T - )
5. DC switch: can judge the►positive and negative electrode input
of photovoltaic array(option).
6. WIFI port.(option)►
The inverter is equipped with WIFI port. If you need to
use WIFI function, please choose to use the External WIFI
& Ethernet Box. WIFI communication can be single or
network used, 32 PCs at most.
5. DC-Switch
(Option)
1. DC Input 3. RS-232
6. WIFI port
4. RS-485
2. AC OUTPUT

Installation and Opertion Manual 9
5. System Operation
5.1 System Mode
The operation modes of KSG-10K/12K5/15K/17K/20K grid-
connected type inverter include the initialization, waiting, self-
checking, grid-connected operating and error modes.
Initialization mode: the internal data will be initialized upon►
power on of controller.
Waiting mode: the inverter will be under waiting mode if the►
output voltage of PV battery board is low and it has not detected
any fault.
Self-checking mode: self-checking will be conducted by inverter►
each time prior to grid-connected operation. The inspection items
include: inspection on insulation impedance at DC side, self-
checking for leakage current detection function and inspection on
AC output relay.
Grid-connected operating mode: the direct current of PV battery►
board is converted to alternating current by the inverter for grid-
connected operation. The advanced MPPT algorithm is adopted
for controller, making the inverter operating at the maximum
power point of PV arrays.
Error mode: the inverter will enter error mode when grid voltage/►
frequency is abnormal or fault arises during grid-connected
process. At this time, it will stop transformation of electric energy
and cut away from the grid.
5.2 Grid-connected Operation
Prior to grid connection of the inverter, please confirm if the wirings
among input side of inverter, PV arrays, output side and power grid
are all correct. Three kinds of modes are optional for connection
between DC input side of KSG-10K/12K5/15K/17K/20K grid-
connected inverter and PV arrays: