CPS DPA03-800V/US User manual

Installation and Operation Manual
for CPS DPA03-800V/US AC Combiner
CHINT POWER SYSTEMS AMERICA CO., LTD.
Rev 2.0 Nov. 30, 2021

Table of Contents
2 / 27 Doc. No.: 9.0020.0589B0
Table of Contents
0Preface.....................................................................................4
1Safety.......................................................................................5
Symbols and meanings in this document..........................................5
Markings and meanings on the device..............................................5
Safety precautions of operating the Combiner ..................................6
2General Introduction..............................................................7
Overview of Grid-tied PV system.......................................................7
Appearance and dimension...............................................................7
Features of AC Combiner..................................................................8
Nameplate.........................................................................................9
2.4.1 Model No. .................................................................................9
2.4.2 Serial No.................................................................................10
Storage requirements......................................................................11
3Mechanical Installation........................................................12
Unpacking for Inspection.................................................................12
Installation requirements .................................................................12
3.2.1 Environment requirements......................................................12
3.2.2 Foundation requirements........................................................13
3.2.3 Installation requirements.........................................................13
Installation procedures ....................................................................13
Open and close the door.................................................................16
3.4.1 Open the door.........................................................................16
3.4.2 Close the door.........................................................................17
4Electrical Connection ..........................................................18
Electrical schematic diagram...........................................................18
Internal wiring terminals and cable specification .............................19
Recommended tools and torque values..........................................19
Wiring..............................................................................................20
4.4.1 Cable connection....................................................................20
4.4.2 Create conduit entry holes......................................................21
5Operation and Maintenance................................................22
Start up and shut down ...................................................................22
5.1.1 Start up ...................................................................................22
5.1.2 Shut down...............................................................................22
Maintenance....................................................................................23

Table of Contents
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5.2.1 Regular inspection...................................................................23
5.2.2 Fuse replacement....................................................................23
6Technical Data ......................................................................24
7Quality Assurance................................................................25
Warranty period ...............................................................................25
Exemption of liability........................................................................25
Warranty clause...............................................................................25
8Contact Information.............................................................26
9Appendix...............................................................................27
Appendix A: Figure list.....................................................................27
Appendix B: Table list ......................................................................27

Preface
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0 Preface
Thank you for choosing CPS DPA03-800V/US Series AC Combiner
(hereinafter referred to as "Combiner") developed by CHINT POWER
SYSTEMS AMERICA CO., LTD (hereinafter referred to as "CPS").
This Combiner is one highly reliable device, which is widely applicable in AC
combining of various PV systems.
IMPORTANT!
Please read this manual carefully and make sure that you have
understood all the contents thoroughly before you start any
operation.
Main Contents
Safety precautions, device overview, installation, operation and maintenance,
technical data as well as quality assurance are mainly introduced in this manual.
Target Reader
This manual is applicable to the work staff of wiring, installation, maintenance
and daily management of the Combiner.
Manual Management
Please store this manual together with related documents of other device
components, and make sure keep it at hand for quick reference and easy use.
Copyrights
CPS reserves all rights in this manual. Any reproduction, disclosure or copy in
whole or in part is forbidden without prior written authorization. CPS doesn’t
accept any responsibilities whatsoever for potential errors or possible lack of
information in this document.
Version
This manual is subject to technical change or contents modification without
prior notice. The actually purchased device shall prevail. Users can get the
latest manual from our sales channel or our official website:
www.chintpower.com.

Safety
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1 Safety
Please read this user manual carefully before the installation and operation of this
Combiner. CPS reserves the right to refuse warranty claims for equipment
damages if users fail to install the equipment according to the instructions in this
manual.
Symbols and meanings in this document
Markings and meanings on the device
Symbol
Meanings
HIGH VOLTAGE!
Danger to life due to high voltage!
All work on the device must only be performed by qualified
personal as described in this document.
HOT!
The equipment is designed according to international safety
standards, but surfaces can become hot during operation. DO
NOT touch the peripheral surfaces during or shortly after
operation.
EARTH GROUND!
This symbol marks the location of grounding terminal, which must
be securely connected to the earth through the PE (protective
earth) cable to ensure operational safety.
Symbol
Meanings
DANGER!
DANGER indicates a hazardous situation with highlevel of risk which,
if not avoided, will result in death or serious injury.
WARNING!
WARNING indicates a hazardous situation with medium level of risk
which, if not avoided, could result in death or serious injury.
CAUTION!
CAUTION indicates a hazardous situation with low level of risk which,
if not avoided, could result in minor or moderate injury.
NOTICE!
NOTICE indicates a hazardous situation which, if not avoided, could
result in equipment working abnormally or property loss.
IMPORTANT!
IMPORTANT indicates important supplementary information or
provides skills or tips that can be used to help you solve a problem or
save you time.

Safety
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RoHS SYMBOL
In accordance with 2011/65/EU regulations, the inverter imposes
restrictions on the use of specific hazardous substances in
electrical and electronic equipment.
TUV Certification
This inverter has passed TUV Certification.
Safety precautions of operating the Combiner
Symbol
Meanings
DANGER!
Touching the wiring terminals inside the device may result in
death by electric shock!
DO NOT touch the terminals or conductors connected with PV
modules or PV inverters, which may result in death by electric
shock!
WARNING!
All the installation and wiring connections should be performed
only by qualified technical personnel.
Make sure both the AC and DC sources are disconnected, and
the shell of device is securely grounded to avoid electric shock
during maintenance or installation.
DO NOT touch live or exposed parts of the input and output sides
to avoid electric shock when checking or maintaining the device.
CAUTION!
Handle the Combiner carefully to prevent falling off due to its
weight!
Check the device and make sure there is no problem with the
installation before putting it into operation!
Connect the wires labeled L1/L2/L3/PE of the device to avoid
short circuit hazard, to ensure personal safety and the normal
operation of the device.
Although the Combiner is certified to international safety
standards, it will become hot during operation. DO NOT touch
the hot parts of the device during operation.
NOTICE!
Follow all the wiring and safety instructions of the Combiner.
All the wiring and operation must conform to the related local
standard requirements of the device.
IMPORTANT!
The device nameplate contains important information of the
device, such as model, serial number and detailed parameters.
If there is any problem or malfunction of the device during
operation, please contact our after-sales center and provide the
serial number. Our service personnel can provide timely service
for you.
Please keep the nameplate intact.

General Introduction
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2 General Introduction
Overview of Grid-tied PV system
The Grid-tied PV system is generally made upof PV modules, string PV inverter
and AC Combiner, etc. The solar energy is converted by PV modules to DC
power and distributed to string PV inverter as the first level of current
combination, and then connected to AC Combiner for second level of current
combination. Now the AC power has the same frequency and phase with the
grid, which can be supplied in all or in part to local loads, with the remaining
power fed to the grid.
This AC Combiner shall be used in combination with the new generation of
CPS SCH275KTL-DO/US-800 series string PV inverter developed by CPS.
For the position and function of the AC Combiner in the Grid-tied PV system,
refer to Figure 2-1.
Figure 2-1 Grid-tied PV system
Appearance and dimension
Figure 2-2 Product Dimension

General Introduction
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Figure 2-3 Product Appearance
Item No.
Component Name
1
Hasp locks (refer to Open the door)
2
Operation handle
3
Hooks
4
Handrails
Table 2-1 Component Name
Features of AC Combiner
High reliability
- High-voltage switch equipped with TYPE3R outdoor operation
handle, which is designed especially for PV system;
- Door cannot be opened once the machine is powered on;
- A transparent protection board made of PC material is installed
on front of the live components, protection function will be
triggered once the door is opened, to avoid your finger touch live
conductor.
Powerful protection performance
- Equipped with high-current, high-breaking and high-voltage AC
fuse.
- It is also possible to place a padlock on the disconnect switch for
Lockout/Tagout purposes.
Convenient installation and maintenance
- Be installed on mounting bracket;
- No locking screws are required.

General Introduction
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Nameplate
The device nameplate contains important information of the device, including
model number, serial number and detailed parameters, etc.
You can find the nameplate of Combiner on the left side of its enclosure, as
shown in Figure 2-4.
Figure 2-4 Nameplate
2.4.1 Model No.
You can find out the model number of the Combiner on the nameplate, as
shown in figure 2-4. Each character included in the model has its special
meanings, as shown in Figure 2-5.
Figure 2-5 Naming convention of the model

General Introduction
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2.4.2 Serial No.
The serial No. can be found out at the bottom left corner in the back side of the
door, as shown in Figure 2-6 (for reference).
Figure 2-6 Serial No.
The serial no is a list of 11 numbers and each number has its special meanings,
the bar code is made up of 128 codes, as shown below (just for reference).
Figure 2-7 Naming convention of the serial no.
IMPORTANT!
If there is any problem or malfunction of the device during operation
in the future, you can contact after-sales service center and provide
the device serial number.
Our service personnel can find out the date of production and other
necessary information quickly and provide service for you in time.
Therefore, please keep the nameplate complete and intact.

General Introduction
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Storage requirements
Close the door tightly, to avoid from opening accidentally.
Storage space shall be clean and dried and be free from dust or
moisture.
The temperature of the storage space shall be kept between -40℃
and +70℃as shown below.
The relative humidity of the storage space shall be kept between 5%
and 95% as shown below.
Figure 2-8 Temperature and relative humidity of the storage space

Mechanical Installation
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3 Mechanical Installation
Unpacking for Inspection
Check the product for any obvious damages or if the items in the delivery list
are complete before performing installation. Contact your supplier immediately
if any problem is found.
The delivery list of the Combiner is as below:
No.
Images
Accessories
QTY (pcs)
1
AC Combiner
1
2
M12*50 screw
42
3
M12 nut
42
4
M12 Flat washer
84
5
M12 Spring washer
42
6
M4*12 comb. screw
6
7
Fixed bracket
2
8
One manual and one warranty
card, one certification
3
Table 3-1 Delivery list
Installation requirements
3.2.1 Environment requirements
Inflammable and explosive materials inside and around the inverter
are strictly prohibited
Good ventilation around the equipment shall be kept.
The temperature shall be kept within -30°C ~ +60°C. If the
environment temperature is more than 55°C, please choose
installation sites with shelters, or sunshades shall be built for outdoor
locations.
It is not recommended to expose the device directly to heavy rain, to
avoid water from entering the device through the cable entry hole in
the bottom in case that the water is very deep.

Mechanical Installation
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3.2.2 Foundation requirements
Before installing the AC Combiner, concrete platforms and trenches shall be
constructed. The requirements for constructing foundation are as follows:
Foundation dimensions shall meet the requirements for Combiner
installation and bearing capacity.
The level error between the foundation and contact surface shall be
less than 5mm.
The strength average of support foundation shall be more than
100kg/cm2.
Embed grounded counterpoise and preserve ground copper bar in
the grounding position.
Grounding resistance of the Combiner shall be less than or equal to
0.1Ω.
The foundation construction shall meet the local maximum rainfall
drainage requirements, drainage shall be handled in accordance
with the local codes and specifications.
The Combiner shall be used together with proper inverter, thus the
construction of the foundation shall meet the demands of other
related products.
3.2.3 Installation requirements
Make sure the device is not electrically connected and energized
before installing.
Never install, use or maintain the device in lightning, rain, snow, wind
and other severe weather.
Do not wear conductive objects such as watches, bracelets, rings,
and necklaces when installing, operating, or maintaining the device.
After installing devices, remove empty packing materials in time,
such as cartons, foams, plastics, and cable ties.
The paint scratches on the cabinet body caused in the process of
transportation and installation must be repaired in time. It is strictly
prohibited to expose the scratched parts to the outdoor environment
for a long time.
Installation procedures
WARNING!
All the installation and wiring connections should be performed only
by qualified technical personnel.
CAUTION!
Heavy device, move it carefully in case of falling off!

Mechanical Installation
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Install the AC Combiner on the integrated mounting bracket as shown below:
1. Position one fixed bracket (2) onto one side of the mounting bracket
(3) and fasten it with one M4*12 securing screw (1) via screwdriver
as shown.
Figure 3-1 Position one fixed bracket
2. Hoist the bottom of the Combiner till all its hooks (4) are aligned with
the mounting bracket (3) and hang them onto the mounting brackets
of the rack.
Figure 3-2 Hoist the Combiner
NOTICE!
The weight of the device is about 120 Kg. For safety purpose, please
hoist it with forklift or hydraulic vehicle as far as possible.
The handrails on both sides of the device is designed for manual
lifting when the electric device is not available.

Mechanical Installation
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3. Slide the side plate of Combiner along the mounting bracket, until it
stays closely with the fixed bracket.
Figure 3-3 Slide the Combiner
4. Fasten the fixed bracket onto the hooks of the Combiner by screwing
another two M4*12 securing screws into the holes of the fixed bracket.
Then fasten another fixed bracket onto the other side of the mounting
bracket to avoid the accidental movement of the Combiner.
Figure 3-4 Fasten the fixed bracket
IMPORTANT!
For the assembly instructions and assembly procedures of the
integrated bracket, please download the specific manual from our
office website.

Mechanical Installation
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Open and close the door
In order to guarantee the protection performance of the Combiner, three hasp
locks with lock holes are provided, refer to the figure 3-5.
After completing the operation, all the hasp locks (1) shall be locked, to avoid
accidental turning the operation handle (2) of the disconnect switch and
opening of the Combiner further, thus causing the risk of electric shock!
Figure 3-5 The overview of hasp locks
3.4.1 Open the door
You can find the view of hasp lock in figure 3-6.
Figure 3-6 Hasp lock
WARNING!
Make sure the power supply is disconnected before opening and
closing the Combiner.

Mechanical Installation
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Perform the following steps to open the Combiner:
1. Turn the operation handle of the disconnect switch to the opened
position.
2. Unlock the padlock and take it off from the lock hole (3).
3. Lift the dovetail (4) of the hasp lock and separate the hasp (2) from
its staple (1);
4. The door can be opened now.
3.4.2 Close the door
Perform the following steps to close the Combiner:
1. Close the door;
2. Lift the dovetail of the hasp lock, so that the hasp is hanged onto the
staple, and then press the dovetail down;
3. Hang the padlock onto the lock hole of the hasp lock and lock it;
4. Turn the operation handle of the disconnect switch to the closed
position.
IMPORTANT!
Before leaving the site after construction, make sure that the
Combiner is locked firmly, to prevent the door is damaged by heavy
rain or strong wind as well as the internal items get wet.
After closing the Combiner, It is possible to place a padlock on the operation
handle of the disconnect switch for Lockout/Tagout purposes, as shown below.
Figure 3-7 Padlock on the operation handle of disconnect switch
NOTICE!
Make sure the operation handle of the disconnect switch on the door
and the disconnect switch are both opened.

Electrical Connection
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4 Electrical Connection
Electrical schematic diagram
The main electrical schematic diagram of the Combiner is shown in Figure 4-1.
The AC power from PV inverters are input to the fuses of Combiner and then
output through disconnect switch. The disconnect switch can meet the input
requirements of the 800VAC power.
Note: PE=Protective earthing
Figure 4-1 Basic electrical schematic diagram of the Combiner
WARNING!
Be careful of high AC voltage! Check all the input and output cables
or terminals to ensure there’s no voltage before electrical connection
to avoid electric shock!
CAUTION!
Connect the cables following strictly the polarities marked on the
device to avoid short circuit hazards.

Electrical Connection
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Internal wiring terminals and cable specification
Figure 4-2 Internal wiring terminals
No.
Name
Cable Specification
1
GND terminal (Copper platoon)
Max.300MCM Cu/AL
2
Out. terminal (Copper platoon)
Max. 2 to 4 conductors 750MCM
Cu/AL
3
Disconnect switch
SIRCO 3X800VAC series;
Outdoor operation handle;
Conform to UL98C standard.
4
AC fuse
BUSSMANN 170M series;
1300V/1000A;
Conform to UL standard.
5
Input terminal (Copper platoon)
Max. 500MCM Cu/AL
Table 4-1 Wiring terminals and cable specification
IMPORTANT!
One phase can connect up to four 750 kcmil wires to support the
1000A fuse.
Recommended tools and torque values
Screw size
Usage
Torque value
M12
Fasten AC output terminal
70-80N.m
M12
Fasten DC input terminal
70-80N.m
M12
Fasten GND terminal
70-80N.m
Table 4-2 Recommended torque values

Electrical Connection
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Wiring
4.4.1 Cable connection
Figure 4-3 Cable connection
Perform cable connection according to the following steps:
Grounding
1. Connect its grounding cable to the GND terminal.
2. Tighten the GND terminal with M12 securing screws, flat washers and
spring washers.
Input terminal
1. Connect its input terminals to the output terminal of the inverter.
2. Tighten the terminal with M12 securing screws, flat washers and
spring washers.
Output terminal
1. Connect its output terminals to the grid power.
2. Tighten the terminal with M12 securing screws, flat washers and
spring washers.
CAUTION!
In order to guarantee the personal safety and device function,
connect the cables following strictly the polarities marked on the
device to avoid short circuit hazards.