Sungrow PVS-8MH-DB User manual

PVS-12MH_16MH-DB-V11-UEN-Ver12-202006
User Manual
PVS-8MH-DB/ PVS-12MH-DB/PVS-16MH-DB
PV Array Combiner Box

Contents
1About This Manual..............................................................1
1.1 Contents....................................................................................1
1.2 Target Readers..........................................................................1
1.3 How to Use this Manual ............................................................1
1.4 Others .......................................................................................2
1.5 Symbol Explanation...................................................................2
1.6 Picture Explanation ...................................................................3
2Safety Instructions..............................................................4
3Product Description............................................................7
3.1 System introduction...................................................................7
3.2 Main features.............................................................................8
3.3 Demonstration of the type.........................................................8
3.4 Dimensions ...............................................................................8
3.5Identifying the PVS....................................................................9
4Mechanical Installation.....................................................10
4.1 Scope of Delivery....................................................................10
4.2 Installation site requirements...................................................10
4.3 Installation Tools...................................................................... 11
4.4 Installing PVS.......................................................................... 11
4.4.1 Overview ................................................................................. 11
4.4.2 Fix the Hangers to PVS...........................................................12
4.4.3 Fixing PVS to Installation Surface ...........................................12
5Electrical Installation ........................................................15
5.1 Internal structure .....................................................................15
5.2 Water-proof terminals..............................................................16
5.3 Wiring preparations .................................................................17
5.4 Connections ............................................................................18
5.4.1 Input connections.................................................................... 18
5.4.2 Output connections ................................................................. 22
5.4.3 Grounding connections ...........................................................23
5.4.4 Communication Connections...................................................24

5.4.5 Cable Layout........................................................................... 27
5.5 Communication settings...........................................................27
5.6 Start/Stop of operation .............................................................29
6Commissioning .................................................................30
7Routine Maintenance........................................................31
7.1 Replace the Fuse.....................................................................31
7.2 Replace the sealing strip..........................................................32
8Troubleshooting................................................................33
8.1 Before troubleshooting.............................................................33
8.2 Common faults and troubleshooting ........................................33
9Appendix............................................................................36
9.1 Technical data..........................................................................36
9.2 Quality Assurance....................................................................37
9.3 Contact Information..................................................................38

1
1 About This Manual
1.1 Contents
Safety instructions
Safety instructions for the installation, operation, commissioning and
maintenance of PVS.
Product description
Location of PVS in the PV system, structure, function and classification.
Installation guide
The installation methods and electrical connections of PVS.
Routine maintenance
How to replace the fuses of PVS.
Others
Technical data of PVS, exclusion of liability and the way to contact us.
1.2 Target Readers
This manual is for users who operate the PVS or conduct the maintenance work.
The operators must be trained and qualified personnel.
1.3 How to Use this Manual
Read this manual and other related documents before installation of the PVS.
Documents must be stored in a convenient place for future reference.
The contents of the manual will be periodically updated or revised due to the
product development. It is probably that there are changes of manual in the
subsequent converter edition.

1 About This Manual User Manual
2
1.4 Others
This document will take the PVS-16MH-DB for example. For the installation and
use of other types of combiner boxes, please also refer to this manual.
PVS-8MH-DB
PVS-12MH-DB
PVS-16MH-DB
The electrical structure, installation and use method of PVS-12MH-DB are the
same with that of PVS-16MH-DB. The only difference between them is the
numbers of DC input string.
1.5 Symbol Explanation
This manual contains important safety and operational instructions that must be
accurately understood and followed during the installation and maintenance of
the equipment.
To ensure optimum use of this manual, note the following explanations of
symbols used.
DANGER indicates a hazard with a high level of risk which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazard with a medium level of risk which, if not
avoided, will result in death or serious injury.
CAUTION indicates a hazard with a low level of risk which, if not
avoided, will result in minor or moderate injury.
NOTICE indicates a situation which, if not avoided, will result in
equipment malfunction or property damage.

User Manual 1 About This Manual
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NOTE indicates additional information, emphasized contents or tips
to help you solve problems or save time.
The following symbols on the device enclosure must be paid attention to.
Symbols
Explanation
Risk of electric shock! If not avoided, lethal hazard can be caused.
Hot surface! Do not touch!
The symbol represents protective conductor terminal. The terminal
should be connected firmly to avoid potential injury or property
damage.
1.6 Picture Explanation
Pictures used in this manual all take the PVS with standard configuration for
example.
The real PVS you received may differ from the example pictures in the numbers
of the installation hangers and etc. please refer to the actual product you
receive.

4
2 Safety Instructions
This chapter describes some important safety instructions about PVS.
Please read the manual carefully before installation. If any device damage
occurs when ignoring the safety instructions, our company has the right to
exclude all warranty claims.
Lethal Voltage!
Death resulting from burning and electric shock upon touching the
live components of the PVS.
Disconnect the end connection of the PV string before cable
connection;
Do not use ordinary ammeter to measure the DC voltage before
cable connection. An ammeter with withstanding voltage of 1500V is
recommended. Serious consequences may follow if otherwise.
Observe all safety instructions required by the PV cell manufacturer.
Device damage or system fault may cause fire and electric shock!
Optical check the device for any possible damages or dangerous
states before operation.
Check if other external devices or circuit connection are in safe state.
Work on the device only when it is safe to do so.
Death or burning hazard by touching the internal terminals of the
device!
Do not touch the terminals or conductors in contact to the inverter or
PV string.
Observe all the instructions and safety regulations related to PVS
connection.

User Manual 2 Safety Instructions
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High voltage is present inside the device!
Follow all the warning signs in the device.
Respect all the safety instructions in this manual and other
documents.
The ground cable must be grounded properly, otherwise,
lethal electric shock happens to the operator or installer once a fault
occurs.
device may be damaged after lightening stroke.
Incorrect cable connection may cause damages to the PV cells, the
PVS and inverter. Respect the following instructions during cable
connection:
Connect by strictly following the circuit diagram;
Measure and make sure the string open-circuit voltage meets the
requirements of the PVS before inserting the fuse;
Identify the positive pole and negative pole before connection.
Only qualified personnel or professional electrician can perform the
operation and wiring described in this manual.
All operations and wirings must in full accordance with the national
and local standards and requirements.
All warning marks and labels must be clear and intact. Replace them
if any damages are found.

2 Safety Instructions User Manual
6
Make sure the terminals are firmly connected during wiring. If the cable
copper core and the terminals are not connected firmly, terminals will
be over-heating and burnt. Anti-flaming cables with multi-strand are
advisable and the cable cross-sectional area should be no less than
the recommended value.
The nuts of the water-proof terminals must be firmly screwed to
prevent water leakage and PVS damages.
Pull the fuse out of the fuse holder for personal and device safety.
Lock the cabinet door and seal the water-proof cover of the lock core
after operation.
No not open the cabinet door frequently.
Touching or improper operation on the PCB or other sensitive
components may damage the device.
Do not touch any parts inside the cabinet other than the connection
terminals.
Respect all ESD related safety regulations and wear antistatic wrist
strap.