Sungrow MVS6840-LV User guide

MVS6400–LV/MVS6840–LV/MVS8850–
LV/MVS8960–LV MV StationSystem
ManualMVS6400_6840_8850_8960-
LV-SEN-Ver15-202310M-H-002652
System Manual
MV Station
MVS6400–LV/MVS6840–LV/MVS8850–LV/MVS8960–LV
MVS6400_6840_8850_8960-LV-SEN-Ver15-202310

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Contents
1 About This Manual ...........................................................................................1
1.1 Validity...........................................................................................................1
1.2 Demonstration of the Model.............................................................................1
1.3 Target_Group.................................................................................................1
1.4 How to Use This Manual .................................................................................2
1.5 Symbols Explanation ......................................................................................2
2 Safety Instructions ............................................................................................4
2.1 General Safety Rules......................................................................................4
2.2 Ground Fault Protection ..................................................................................5
2.3 Live Line Measurement...................................................................................5
2.4 Measuring Instrument .....................................................................................5
2.5 Voltage-free Operations ..................................................................................6
2.6 ESD_Protection..............................................................................................6
2.7 Symbols on the Device Body ...........................................................................6
2.8 Safety Warning Signs......................................................................................7
2.9 Daily Operation and Maintenance ....................................................................7
2.10 Others .........................................................................................................8
2.10.1 Manual Storage...................................................................................8
2.10.2 Disposal of Waste ...............................................................................8
2.10.3 Manual Description..............................................................................8
3 Product Description ..........................................................................................9
3.1 System Overview ...........................................................................................9
3.2 External Design............................................................................................10
3.2.1 MV Station Views................................................................................10
3.2.2 Composition .......................................................................................12
3.2.3 Exterior Dimensions ............................................................................12
3.3 Internal Design.............................................................................................13
3.3.1 Internal Composition ...........................................................................13
3.3.2 Cable Entries......................................................................................13
3.3.3 Internal Devices ..................................................................................14
4 Identify and Store the MV Station ................................................................20

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4.1 Identifying the MV Station..............................................................................20
4.2 Checking for Transport Damages...................................................................20
4.3 Storage........................................................................................................20
5 Mechanical Installation ..................................................................................22
5.1 Transport .....................................................................................................22
5.2 Hoisting the MV Station.................................................................................23
5.2.1 Safety Precautions ..............................................................................23
5.2.2 Hoisting..............................................................................................24
5.2.3 Fastening of Connectors......................................................................25
5.3 Foundation...................................................................................................26
5.3.1 Selection of Installation Site .................................................................26
5.3.2 Recommended Foundation Construction Plan.......................................27
5.3.3 Securing the MV Station(optional) ........................................................27
5.4 Installation Verification ..................................................................................29
5.5 Clearance Requirement ................................................................................29
5.6 Removing Rain cover and Sealing Tapes .......................................................29
6 Electrical Connection .....................................................................................31
6.1 Safety Instructions........................................................................................31
6.1.1 Generals Rules ...................................................................................31
6.1.2 Five Safety Rules................................................................................33
6.2 Circuit Diagram ............................................................................................33
6.3 Preparation before Cable Connections ...........................................................34
6.3.1 Installation Tools .................................................................................34
6.3.2 Opening the Door................................................................................35
6.3.3 Checking the Cables ...........................................................................35
6.3.4 During Connection ..............................................................................36
6.4 Cable Connection.........................................................................................36
6.4.1 Ground Connection .............................................................................36
6.4.2 LV Side Connection.............................................................................37
6.4.3 MV Side Connection............................................................................42
6.4.4 Communication Connection .................................................................43
6.4.5 Auxiliary Power Supply Cable Connection.............................................45
6.5 Checking after Electrical Connection..............................................................46
7 Power On the MV Station ..............................................................................48
7.1 Checking before Power on ............................................................................48
7.1.1 MV Station Container ..........................................................................48

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7.1.2 MV Switchgear....................................................................................48
7.1.3 MV Transformer..................................................................................49
7.1.4 LV Cabinet .........................................................................................51
7.2 Power-on Steps............................................................................................51
8 Troubleshooting ..............................................................................................52
9 Routine Maintenance .....................................................................................54
9.1 Safety Instructions........................................................................................54
9.2 Maintenance ................................................................................................55
9.2.1 Introduction ........................................................................................55
9.2.2 Maintenance Interval ...........................................................................55
9.3 Checking and Cleaning the Filter ..................................................................57
9.3.1 Checking and Cleaning the Air Inlets ....................................................58
9.3.2 Checking and Cleaning Air inlets of the Heat Exchanger ........................58
9.4 Oil Drain ......................................................................................................59
9.5 Painting Make-up Measures..........................................................................60
9.6 Replace the Fuse of LV Cabinet.....................................................................64
10 Appendix .......................................................................................................67
10.1 Technical Parameters .................................................................................67
10.2 Tightening Torques .....................................................................................72
10.3 Quality Assurance ......................................................................................72
10.4 Contact Information ....................................................................................73

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1About This Manual
1.1 Validity
This manual is intended for the following product:
• MVS6400-LV
• MVS6840-LV
• MVS8850-LV
• MVS8960-LV
Hereinafter it will be referred to as " MV Station" unless otherwise specified.
1.2 Demonstration of the Model
Model Rated power Devices can be connected
MVS6400-LV 6400 kVA@40℃20 x SG350HX
MVS6840-LV 6840 kVA@40℃24 x SG285HX
MVS8850-LV 8850 kVA@50℃30 x SG320HX
MVS8960-LV 8960 kVA@40℃28 x SG350HX
The function, appearance and wiring method of the models are the same, but the number of
inverters is different. This manual takes MVS8850-LV as an example to briefly introduce the
installation and wiring instructions of MV Station.
1.3 Target_Group
This manual is for technical personnel who are responsible for the transport, installation and
other operations of the MV Station. Only qualified personnel can perform the installation,
maintenance and troubleshooting of the MV Station. Unauthorized persons should not
perform any operation on the MV Station and should be away from the MV Station to avoid
potential hazards. Qualified personnel are:
• Equipped with certain electrical wiring and mechanical knowledge and familiar with
electrical and mechanical principle diagram
• Familiar with the construction and working principle of the PV grid-connected power
generation system; and familiar with the construction and working principle of the MV
Station upstream and downstream equipment
• Trained especially in the installation of electrical devices
• Capable of coping with the dangerous and emergency situations during the installation
and commissioning

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• Familiar with the country/regional standards and specifications
• Familiar with this manual
1.4 How to Use This Manual
Read this manual carefully before installing the device. Keep this manual and other product
component information together to ensure ease of access. In addition to this manual, the
following documentations are provided:
• MV Switchgear manual
• MV Transformer manual
• Other enclosed manuals
All rights reserved including the pictures, symbols, and identifiers used in this manual. Any
reproduction or disclosure, even partially, of the contents of this manual is strictly prohibited
without prior written authorization of SUNGROW.
1.5 Symbols Explanation
This manual contains important safety and operational instructions that must be accurately
understood and respected during the installation and maintenance of the equipment.
To ensure the optimum use of this manual, note the following explanations of the 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,
could result in death or serious injury.
CAUTION indicates a hazard with a low level of risk which, if not avoided, could
result in minor or moderate injury.
NOTICE indicates a situation which, if not avoided, could result in equipment or
property damage.
1 About This Manual System Manual

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NOTE indicates additional information, emphasized contents or tips to help you
solve problems or save time.
The symbols below may be found on the electrical parts of the product. Make sure to read
the following symbols and fully understand them before installing the equipment.
Symbol Explanation
Lethal voltage inside! Do not touch!
Hot surface! Do not touch the hot surface of
the device.
Protective earth. Earthing securely to
ensure personal safety.
System Manual 1 About This Manual

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2Safety Instructions
2.1 General Safety Rules
Touching the terminals or contactors connected to the grid may lead to electric
shock!
• Do not touch the terminals or conductors connected to the grid.
• Respect all safety instructions on the grid connection.
Lethal voltages are present inside the device!
• Pay attention to and follow the warning signs on the device.
• Respect all safety instructions in this manual and other pertinent documents.
Electric shock or fire may occur due to device damage or system fault.
• Visually inspect the MV Station for device damages or other hazards.
• Check if the external devices and circuit connections are safe.
• Only operate the device when it is safe to do so.
All installations and operations on the MV Station must be in full accordance with
the national and local regulations and standards.
Ensure that the installation environment (such as voltage, temperature, humidity,
altitude, pollution level, water-proof and dust-proof level) is within the scope of
equipment specifications.
The locking device on the pressure relief valve must be removed before operation.
refer to """7.1.3 MV Transformer""".