Chint Power CPS Series User manual

CPS Series Photovoltaic Grid Connection
Inverter CPS SC100KT
Installation and Operation Manual
Shanghai CHINT Power Systems Co., Ltd.

Table of Contents
Chapter 1 Safety Instructions............................................ 1
Chapter 2 Overview........................................................... 3
2.1 Photovoltaic system for grid connection .............. 3
2.2 Inverter circuit structure....................................... 4
2.3 Illustration for front and top views........................ 5
Chapter 3 Installation........................................................6
3.1 Basic requirements.............................................. 6
3.2 Mechanical installation ........................................ 6
3.3 Electrical installation ........................................... 9
3.3.1 DC connection.........................................10
3.3.2 AC connection .........................................12
3.3.3 Communication connection .....................13
Chapter 4 Operation ....................................................... 15
4.1 Start-up and shut-down ......................................15
4.1.1 Start-up....................................................15
4.1.2 Shutdown ................................................15
4.2 Operation mode..................................................16
4.3 Grid connection and power generation...............18
4.4 Fault shutdown ...................................................19

2
Chapter 5 Human Machine Interface ...............................28
5.1 Description of LCD display ..............................28
5.2 Operation State ..................................................29
5.3 Interface and menu functions .............................30
5.3.1 Interface types ........................................30
5.3.2 Main operation interface..........................32
5.3.3 Operation information..............................33
5.3.4 Present fault............................................34
5.3.5 History.....................................................34
5.3.6 System setup ..........................................36
5.3.7 System protection parameter setup ........37
Chapter 6 Technical Data ................................................40
Chapter 7 Quality Assurance ...........................................42
7.1 Warranty.............................................................42
7.2 Disclaimer ..........................................................42
7.3 Quality clause (Warranty clause)........................42

Chapter 1 Safety Instructions
1
Chapter 1 Safety Instructions
Please read this manual carefully before installation. CPS
reserves have the right not to guarantee the quality for
equipment damage if the user fails to install the equipment
as per the instructions in this manual.
Electric shock hazard:
Make sure that all DC and AC are isolated from the
equipment to prevent electric shock hazard during
equipment maintenance or installation. At the same time,
make sure that equipment is grounded properly.
Warning:
All operations and wiring should be performed by qualified
technical personnel.
When the connected solar cell panel is exposed to the
sunlight, it generates DC voltage and charges the DC bus
capacitors of the inverter. Electric charges are still stored in
the capacitors even the input of the photovoltaic inverter is

Chapter 1 Safety Instructions
2
switched off. Therefore, equipment shall not be serviced or
operated until 60 minutes after all inputs are switched off.
For grid connection only!
This inverter is specially designed for directly connecting AC
power to public power grid. Do not connect the AC output of
this equipment directly to private AC power equipment.
High temperature:
This product complies with the international safety standard,
but the inverter would generate heat during operation. So do
not touch the metal surfaces of the radiator and inverter
during the operation of the inverter.

Chapter2 Overview
3
Chapter 2 Overview
2.1 Photovoltaic system for grid connection
CPS SC100KT grid connection photovoltaic inverter
applies to all kinds of commercial roof grid connected system
or grid connected power station system. Normally, the
system consists of solar cell modules, DC power distribution
unit, grid connection inverter and AC power distribution unit
(Figure 2-1). Solar energy is converted to direct current
through solar cells. The direct current is then converted to
alternative current with the same frequency and phase as
the grid through grid connection inverter. All or part of the
alternative current is supplied to the local load. The
remaining or all electricity is fed to the grid.
Figure 2-1 Grid connection photovoltaic power generation system
DC power
distribution
unit
AC power
distribution
unit
Metering
out
Metering
in
AC load
AC grid

Chapter 2 Overview
4
2.2 Inverter circuit structure
The basic schematic diagram of CPS SC100KT inverter
is shown in Figure 2-2. The output of solar cells first passes
through DC switch and DC EMI wave filter circuit. The
inverter then converts DC voltage to 3-phase AC voltage.
The output wave filter will remove high frequency component,
and is connected to LV grid through industrial frequency
transformer step-up and isolation, AC contactor, AC EMI
wave filter and circuit breaker.
Figure 2-2 Schematic diagram
DC EMI Filter
Surge Protector
Inverter
AC EMI Filter
Surge Protector
L1
L2
L3
PV+
PV-
=
3 ~
ISO Detection
Sine Wave Filter
Control
&
Monitor
G
CPS SC100T
Ipv
Upv+
Upv-
Ia
Ib
Ic
JCQ
Uab
Ubc
Uca
PWM
RS485+
RS485-

Chapter2 Overview
5
2.3 Illustration for front and top views
Figure 2-3 Appearance sketch
Description of main items (shown in Figure 2-3):
1、Mounting plate for lifting ring
2、Display panel (with LED indication and LCD Display)
3、Operation keys (Up, Down, Left, Right, ESC, ENT)
4、Emergency switch button
5、Switch on DC side
6、Lock
7、Switch on AC side
1
7
2
6
4
5
3

Chapter 3 Installation
6
Chapter 3 Installation
3.1 Basic requirements
The protection level of CPS SC100KT photovoltaic
inverter is IP20. Do not install it in a humid environment.
Check and make sure that the ambient temperature
of the installation location is －20 C ～＋65C;
Make sure that the commercial power grid voltage is
320～460Vac, 50Hz;
Grid connection permit has been obtained from the
power authority;
Installation personnel must be qualified electricians
or have under gone professional trainings;
Sufficient convection space;
Away from flammable and explosive substances
3.2 Mechanical installation
(1) Dimensions
Dimensions of CPS SC100KT photovoltaic inverter are
shown in Figure 3-1.The dimensions of foundation
installation are shown in Figure 3-2.

Chapter 3 Installation
7
920
726
1900
Figure 3-1 Sketch of dimensions
Figure 3-2 Sketch of foundation installation dimensions
(2) Requirements on inverter installation：
Front door: A 560mm space should be reserved to
ensure that the front door can be opened and closed freely.
Back: A 600mm space should be reserved to allow for
maintenance.
Top: A 600mm space should be reserved for heat
dissipation.

Chapter 3 Installation
8
The weight of the inverter is approximately 900kg. Make
sure that the mounting place can bear the weight. Two
approaches are recommended to lift the machine, i.e. lifting
with a crane and lifting with a hydraulic forklift:
Lifting with a crane：
Bolt the 4 lifting lugs at the 4 corners of the top the
machine. Lift the machine to the appropriate location for
installation with the crane (shown in Figure 3-3).
Figure 3-3 Sketch of handling by crane
Lifting with a hydraulic forklift:
Remove the front and back baffles at the bottom of the
machine. Insert the fork into the bottom of the machine and
lift it to the appropriate location for installation (shown in
Figure 3-4).

Chapter 3 Installation
9
Figure 3-4 Sketch of handling by forklift
3.3 Electrical installation
Open the front door of the machine. Proceed as shown
in Figure 3-5.
1、Turn the handle bar of the latch at DC side to right
toward horizontal position.
2、Turn the handle bar of the latch at AC side to right
toward horizontal position.
3、Unlock the door with the key. Turn it to the right and
horizontal position, then pull outward to open the front door.
back baffle
front baffle

Chapter 3 Installation
10
Figure3-5 Sketch of opening front door
4、Remove the transparent Plexiglas cover at the bottom
of the machine and install the external wires after the front
door is open (as shown in Figure 3-6).
Figure 3-6 Sketch of external wiring
3.3.1 DC connection
(1)The following rules must be followed to allow the
photovoltaic inverter to operate properly:
(a) First, ensure that the maximum open circuit
voltage of the photovoltaic modules is lower than
880VDC at any conditions;
All external wires must
penetrate the wire holes at
the bottom of the machine
132

Chapter 3 Installation
11
(b) Ensure that the polarity of DC input is correct, i.e.
the positive pole of photovoltaic module is
connected to the positive pole of the inverter DC
input, and the negative pole of photovoltaic
module is connected to the negative pole of the
inverter’s DC input;
(c) 35～70mm2 copper core cables can be used for
inverter’s DC input;
(d) The inverter’s maximum DC input current is 250A.
Two incoming 70mm2copper core cables are
recommended as minimum. Three incoming
50mm2copper core cables can also be used. Four
incoming 35mm2 copper core cables can be used
as maximum;
(2) Confirm that the input photovoltaic modules are of
the same specifications and types before connection of DC
input;
(3) Compress the positive and negative cable terminals
of the DC source and then connect them to the positive and
negative buses of the inverter respectively, as shown in
Figure 3-7

Chapter 3 Installation
12
Figure 3-7 DC input wiring
3.3.2 AC connection
Connect the AC output of photovoltaic inverter to the AC
cabinet or the power grid through AC output cables and
grounding wires:
(1) Use the recommended AC output cables,
L1 (Line 1)、L2 (Line 2)、L3 (Line 3) ：70mm2
Gnd (PE)：35mm2；
(2) Connect the AC output cables to the terminals
shown in Figure 3-8

Chapter 3 Installation
13
Figure 3-8 AC output wiring
(3) Connect power grid A to terminal L1. Connect power
grid B to terminal L2. Connect power grid C to terminal L3.
Connect power grid PE cable to terminal G.
(4) Tighten terminals L1, L2, L3 and PE. Make sure that
all cables are tightened properly.
3.3.3 Communication connection
Functions corresponding to signal wiring terminals are
shown in Figure 3-9.
Figure 3-9 Sketch of functions corresponding to the signal wiring
terminals

Chapter 3 Installation
14
(1) Terminal 1 is connected to RS485+. Terminal 2 is
connected to RS485－. Twisted pair cable is connected to
485 busbar.
(2) Terminal 3 and terminal 4 can be connected to an
external 380V power supply and used as power supply of
the inverter. The selector on the signal wiring terminal should
be turned to “OUTSIDE” if an external power supply is used .
as the power supply of the inverter. Normally, the selector is
turned to “INSIDE”.
(3) Terminal 5 and terminal 6 are inverter fault alarm
(passive).

Chapter4 Operation
15
Chapter 4 Operation
4.1 Start-up and shut-down
4.1.1 Start-up
Check and make sure that input and output cables are
connected correctly. Close the DC circuit breaker at PV side
then close the AC circuit breaker at power grid side.
Manual start-up: Manual start-up is required after initial
installation or manual (failure) shut-down.
Move the cursor from the main operation interface
to“4 Setting”. Click the ENTER key and enter
submenu “1 ON/OFF”. Then move the cursor to
“ON” and pressing the ENTER key to start the
inverter.
The inverter will enter into normal operation mode if
it is ready for startup and will enter into standby
mode if it is not ready for startup.
Automatic start-up: The inverter will be started automatically
when the output voltage and output power of PV
panel meet the set points, AC power grid is normal,
and the ambient temperatuer is within allowable
operating range.
4.1.2 Shutdown
Manual shut-down: Normally, manual shutdown is not
required. It can be shut down by manual if repair

Chapter4 Operation
16
or shutdown by human is required.
(1) Move the cursor from the main operation
interface to “4 Setting”. Click the ENTER key and
enter submenu “1 ON/OFF”. The inverter is shut
down after moving the cursor to “OFF” and
pressing the ENTER key.
(2) Press the emergency button on the panel to
shut down the inverter in case of emergencies.
Automatic shut-down: The inverter will be shut down
automatically when the output voltage and output
power of PV panel are lower than the set points,
or AC power grid fails; or the ambient
temperature exceeds the normal range.
4.2 Operation mode
There are 4 operation modes. Appropriate indications
are shown for each mode.
(1) Self test for startup, as shown in Figure 4-1:
Figure 4-1 Self-Checking for inverter
This mode indicates that the inverter is checking itself
whether it is ready during the startup of the inverter.

Chapter4 Operation
17
(2) Normal operation, as shown in Figure 4-2:
Figure 4-2 Default indication interface for normal operation
In this mode, the inverter converts the power generated
by solar cell panels to AC continuously and feeds in the
power grid.
(3) Standby mode, as shown in Figure 4-3:
The inverter will enter standby mode when the voltage
of PV panel is too low or output power cannot meet the
startup condition. The inverter will check automatically
whether it meets the startup conditions in this mode until it
enters normal mode. The inverter will change from standby
mode to failure mode if it fails.
Figure 4-3 Inverter system in standby mode