Sungrow SG2500U-MV User guide

SG2500U-MV-V11-SEN-Ver10-201805
SG2500U-MV
MV Turnkey Station
System Manual

I
Contents
1About This Manual....................................................................1
1.1 Preface........................................................................................................1
1.2 Validity .........................................................................................................1
1.3 Content........................................................................................................1
1.4 Target Group................................................................................................1
1.5 Symbols Explanation...................................................................................2
1.6 How to Use this Manual ..............................................................................3
1.7 Terminology.................................................................................................3
2Safety Instructions ...................................................................4
2.1 Intended Usage...........................................................................................4
2.2 Important Safety Instructions.......................................................................4
2.2.1 General Safety Rules..........................................................................5
2.2.2 Manual Storage...................................................................................5
2.2.3 PV Arrays Hazards..............................................................................5
2.2.4 Ground Fault Protection......................................................................6
2.2.5 Live Line Measurement.......................................................................6
2.2.6 Measuring Instrument .........................................................................6
2.2.7 Volt-free Operations............................................................................6
2.2.8 ESD Protection....................................................................................7
2.2.9 LCD Parameter Setting.......................................................................7
2.2.10 Sand and Moisture Protection...........................................................7
2.2.11 Symbols on the Device Body............................................................7
2.2.12 Safety Warning Signs........................................................................7
2.2.13 Daily Operation and Maintenance.....................................................7
2.2.14 Disposal of Waste.............................................................................8
2.2.15 Manual Description ...........................................................................8
2.3 Safety Instructions of Each Working Area...................................................8
2.3.1 Safe Operation of the MV Station room ..............................................9
2.3.2 Safe Operation of the Transformer Room...........................................9
3Product Description ...............................................................10
3.1 Brief Introduction .......................................................................................10
3.2 MV Station Internal Construction...............................................................10

II
3.3 Overall Design of the MV Station ..............................................................11
3.3.1 MV Station Views ..............................................................................11
3.3.2 Mechanical Parameter..................................................................... 13
3.3.3 Ventilation Design ............................................................................ 14
3.4 Interior Design of the MV Station.............................................................. 14
3.4.1 Internal Components........................................................................ 14
3.4.2 Cable Entry Design .......................................................................... 15
3.4.3 Internal Devices of the MV Station................................................... 16
3.4.4 Operations on the DC circuit breakers............................................. 17
4Identify and Store the MV Station......................................... 18
4.1 Identifying the MV Station......................................................................... 18
4.2 Checking for Transport Damages............................................................. 18
4.3 Storage of the MV Station......................................................................... 18
5Mechanical Installation.......................................................... 20
5.1 Transport .................................................................................................. 20
5.2 Hoisting the MV Station............................................................................ 21
5.2.1 Safety Precautions........................................................................... 21
5.2.2 Hoisting ............................................................................................ 22
5.2.3 Fastening of Connectors.................................................................. 23
5.3 Foundation................................................................................................ 23
5.3.1 Selection of Installation Site............................................................. 23
5.3.2 Foundation Requirements................................................................ 23
5.3.3 Recommended foundation construction plan................................... 24
5.3.4 Other Precautions ............................................................................ 26
5.4 Removing Flashings and Cover Plates................................................ 27
6Electrical Installation............................................................. 28
6.1 Safety Instructions.................................................................................... 28
6.1.1 Generals rules.................................................................................. 28
6.1.2 Five Safety Rules............................................................................. 29
6.2 Parts for Cabling....................................................................................... 30
6.2.1 Copper Wire Connection.................................................................. 30
6.2.2 Aluminum Wire Connection.............................................................. 31
6.3 Tightening Torques................................................................................... 31
6.4 Preparation before Electrical Connections............................................... 31
6.4.1 Installation Tools............................................................................... 32
6.4.2 Opening the MV Station door........................................................... 32
6.4.3 Removal of the Protective Grid........................................................ 32

III
6.4.4 Removing Sealing Tapes of Cable Inlet holes ..................................32
6.4.5 Checking the Cables.........................................................................32
6.4.6 During Connection ............................................................................33
6.5 MV Station Circuit Diagram and Cable Connection ..................................33
6.5.1 Circuit Diagram .................................................................................33
6.5.2 Cable Specifications..........................................................................33
6.6 General principles for cable connections ..................................................34
6.7 DC Connection..........................................................................................34
6.7.1 Checking before Connection.............................................................34
6.7.2 DC Cable Connection .......................................................................34
6.8 AC Connection ..........................................................................................36
6.8.1 Safety Notices...................................................................................36
6.8.2 AC Cable Connection........................................................................37
6.9 Ground Connection ...................................................................................37
6.9.1 Brief Introduction...............................................................................37
6.9.2 Equipotential Connection of MV Station Internal Devices.................37
6.9.3 External grounding............................................................................38
6.10 Communication Connection ............................................................39
6.11 External Power Supply Connection.............................................40
6.12 Finishing Electrical Connection .......................................................41
7Commissioning.......................................................................42
7.1 Safety Instructions.....................................................................................42
7.2 Requirements for Commissioning.............................................................42
7.3 Checking before Commissioning ..............................................................43
7.3.1 Checking the Cable Connection .......................................................43
7.3.2 Checking the module ........................................................................43
7.3.3 Checking PV Array............................................................................43
7.3.4 Checking Grid Voltage ......................................................................44
7.4 Preparation before Starting .......................................................................44
7.5 Starting the Device ....................................................................................44
7.6 LCD Parameter Setting.............................................................................45
7.7 Completing Commissioning.......................................................................45
8Starting/Stopping....................................................................47
8.1 Starting ......................................................................................................47
8.1.1 Inspection before starting..................................................................47
8.1.2 Starting Steps....................................................................................47
8.2 Stopping.....................................................................................................48

IV
8.2.1 Normal Stop ..................................................................................... 48
8.2.2 MV Station Stops when A Fault Occurs............................................ 48
9LCD Menu Operation............................................................. 49
9.1 LCD Touch Screen ................................................................................... 49
9.2 Default Screen.......................................................................................... 49
9.2.1 Initialization....................................................................................... 49
9.2.2 Default Screen Introduction.............................................................. 49
9.2.3 Backlight and Screensaver .............................................................. 50
9.3 Overview of LCD Menu and Icon ............................................................. 50
9.3.1 Overview of Submenu and Icon....................................................... 50
9.3.2 Layout of the submenus................................................................... 50
9.4 Entering Password ................................................................................... 51
9.5 Language Setting ..................................................................................... 52
9.5.1 Conventional Way............................................................................ 52
9.5.2 Shortcut............................................................................................ 52
9.6 Date and Time Setting.............................................................................. 53
9.7 Running Information Checking................................................................. 53
9.8 History Information Checking ................................................................... 54
9.8.1 History Event Checking.................................................................... 54
9.8.2 History Data Checking ..................................................................... 55
9.8.3 History Fault Checking..................................................................... 55
9.8.4 HistoryAlarm Checking.................................................................... 56
9.9 Present Fault Information Checking......................................................... 56
9.10 Starting/Stopping............................................................................. 57
9.11 Load Default ................................................................................... 57
9.12 Firmware Version Checking............................................................ 57
9.13 Parameters of LCD......................................................................... 58
9.13.1 Communication Parameters........................................................... 58
9.13.2 Running Parameters ...................................................................... 59
9.13.3 Protection Parameter ..................................................................... 61
10 MV Station Functions ............................................................ 66
10.1 Operation Mode.............................................................................. 66
10.1.1 Mode Change................................................................................. 66
10.1.2 Operation Mode Description .......................................................... 66
10.2 Complete Control Strategy ............................................................. 68
10.3 Active Power Limitation .................................................................. 68
10.3.1 Introduction to Active Power Limitation.......................................... 68

V
10.3.2 How to Realize Power Limitation....................................................68
10.4 Reactive Power Adjustment.............................................................69
10.5 L/HVRT............................................................................................70
10.6 Temperature Derating......................................................................71
10.7 MPPT...............................................................................................71
10.8 Intelligent Temperature-Control Technology....................................72
10.9Insulation Monitoring Function.........................................................72
10.9.1 Introduction .....................................................................................72
10.9.2 Simple Troubleshooting ..................................................................72
10.10 GFDI Function .................................................................................73
10.11 Vs-U Curve......................................................................................73
10.12 Protection Function..........................................................................73
10.12.1 DC over-voltage protection ...........................................................73
10.12.2 AC over/under-voltage protection .................................................73
10.12.3 Frequency anomaly protection......................................................73
10.12.4 Islanding protection.......................................................................73
10.12.5 Reverse polarity protection ...........................................................74
10.12.6 Overload protection.......................................................................74
10.12.7 Ground protection .........................................................................74
10.12.8 Module over-temperature protection.............................................74
10.12.9 Internal over-temperature protection.............................................74
10.13 Firefighting.......................................................................................74
10.13.1 General Introduction .....................................................................74
10.13.2 Smoke Detector ............................................................................74
11 Troubleshooting......................................................................76
11.1 Safety Instructions...........................................................................76
11.2 Fault Checking.................................................................................76
11.3 Fault and Troubleshooting on the LCD screen................................77
11.4 LCD DisplayAlarm Information and Troubleshooting .....................81
11.5 Other Faults.....................................................................................83
12 Routine Maintenance..............................................................84
12.1 Safety Instructions...........................................................................84
12.1.1 Safety Instructions...........................................................................84
12.1.2 Five Safety Rules............................................................................85
12.2 Maintenance....................................................................................85
12.2.1 Introduction .....................................................................................85
12.2.2 Maintenance Interval.......................................................................85

VI
12.2.3 Filter checking and cleaning........................................................... 87
12.2.4 Cleaning MV Station Air Inlet Window............................................ 88
12.2.5 Replacement of the electrical components.................................... 89
12.3 On-site painting make-up measures............................................... 89
12.4 Replacement of the electrical components..................................... 93
13 Appendix ................................................................................ 94
13.1 MV Station System Parameter........................................................ 94
13.1.1 Input data (DC side)....................................................................... 94
13.1.2 Output data (Grid side)................................................................... 94
13.1.3 Mechanical parameters.................................................................. 94
13.1.4 System data ................................................................................... 94
13.2 Exclusion of Liability ....................................................................... 95
13.3 Contact Information ........................................................................ 95

1
1 About This Manual
1.1 Preface
Thank you for purchasing the MV Turnkey Station from Sungrow Power Supply Co., Ltd.
We hope that the device will meet your satisfaction. Your commands and feedbacks on the
performance and function of the device are very important for our further improvement.
1.2 Validity
This manual is applicable to the MV Turnkey Station product of SG2500U-MV (hereinafter it
will be referred to as "MV Station" unless otherwise specified).
1.3 Content
This manual contains the following information:
Content
Description
Safety
instruction
Safety instructions concerning the installation, operation, maintenance and
troubleshooting of the MV Station
Product
Description
The appearance and internal components of the MV Station
Delivery
Delivery and inspection after receiving the MV Station
Installation
Mechanical transport, installation, and electrical connection of the MV
Station
Commissioning
Safety notices and commissioning process when the MV Station is powered
on for the first time
Start/Stop
Steps to start and stop the MV Station internal devices during normal
maintenance or troubleshooting
Operation of
LCD Display
Function and use of the MV Station HMI
Functions
Descriptions of the MV Station main functions
Troubleshooting
Simple troubleshooting of the MV Station
Daily operation
Instructions and guide of the daily operation of the MV Station
1.4 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 to the MV Station and should be away from the MV
Station to avoid potential hazards. Qualified personnel are:
Equipped with certain electrical, 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; familiar with the construction and working principle of upstream and
downstream equipment
Trained specifically for electrical device installation and commissioning

1 About This Manual System Manual
2
Equipped with the ability to cope with the dangerous and emergency situations during
installation and commissioning
Familiar with the country/regional standards and specifications
Familiar with this manual
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.
NOTE indicates additional information, emphasized contents or tips to help
you solve problems or save time.
The symbols below may be pasted on the electrical parts of the MV Station or its inside
device. 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
3
1.6 How to Use this Manual
Read this manual and other related documents before transporting and installing the MV
Station. Documents must be stored at hand and available at all times.
Additional documents are also available to the users:
Manual of the Transformer
All rights reserved including the pictures, markings and symbols used. Any reproduction or
disclosure, even partially, of the contents of this manual is strictly forbidden without prior
written authorization of Sungrow.
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 MV Station
edition. The latest manual can be acquired via visiting the website at
www.sungrowpower.com.
Please read over this manual and other related manuals before installation and
operation of the devices inside the MV Station.
1.7 Terminology
Name
For short
MV Turnkey Station
MV Station
Intelligent power distribution cabinet
Intelligent PMD or PMD
The foregoing devices are expressed in the abbreviation form in this document unless
otherwise specified.

4
2 Safety Instructions
2.1 Intended Usage
The MV Station, R & D and manufactured by Sungrow, is mainly applied to
large-and-medium PV power station. The MV Station integrates the DC cabinet, module
cabinet, medium voltage transformer, monitoring & power distribution units, firefighting
system, lighting devices, and security & protection system to meet the modular design and
quick installation requirement of the large-and-medium PV power station as well as ensure
the long-time, reliable and safe grid-connected power generation.
The PV power generation system with MV Station is shown in the following figure.
A B CD
Fig. 2-1 Application of MV Station to the PV Power System
No.
Name
A
PV Array
B
PV Array Combiner Box
C
MV Station
D
Utility Grid
Installation of the MV Station not in compliance with the description in this
manual or installation or modification of the device without authorization from
Sungrow may lead to personal injuries or device damages and may void pertinent
warranty claims from Sungrow.
2.2 Important Safety Instructions
Read the safety instructions carefully before installing the MV Station. Refer to
corresponding manuals for the safety instructions on the internal devices.

System Manual 2 Safety Instructions
5
2.2.1 General Safety Rules
Touching the terminals or contactors connected to the grid may lead to electric
shock hazards!
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 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 the device damage or system fault.
Visually inspect 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 to
the national and local regulations and standards.
2.2.2 Manual Storage
Product manuals are indispensable parts of the product. Very important information about
the transport, installation, maintenance and troubleshooting of the MV Station is included in
this manual. All the descriptions in this manual, especially those safety-related items, must
be complied with. Please read all the instructions thoroughly prior to any operation work on
the MV Station.
Transport, install, maintain and service the MV Station by strictly following the
descriptions in this manual. Device damage, personal injury or property loss may follow
if otherwise.
This manual and relevant documents should be available for relevant persons at all
times.
2.2.3 PV Arrays Hazards
DC high voltage! Electric shock hazards!
When exposed to sunlight, PV array will produce voltage, which is very high in a
large-scale power station.
Death resulting from burning and electric shock upon touching the PV array.
During installation, maintenance and troubleshooting of the device, please ensure:

2 Safety Instructions System Manual
6
MV Station is disconnected from the PV array.
Necessary warning signs are in place to prevent accidental reconnection.
2.2.4 Ground Fault Protection
If a ground fault occurs in the PV system, some parts that were voltage-free
before may contain lethal voltage. Accidental touch may cause serious damage.
Make sure there is no system ground fault before operation and take proper
protective measures.
2.2.5 Live Line Measurement
High voltages are present inside the device. Death resulting from burning and
electric shock upon touching the live components of the MV Station. During live
line measurement,
use suitable protective equipment, for example, dielectric gloves, and
accompany by other persons.
2.2.6 Measuring Instrument
Instrument for measurement of the electrical parameters should meet the requirements
listed below:
Instrument for measurement of the electrical parameters should be high quality
instrument with sufficient measuring range.
Make sure the connection and use of the instrument are correct to avoid arc and
other dangerous situations.
Use suitable protective equipment, for example dielectric gloves if live line
measurement is required.
2.2.7 Volt-free Operations
Perform operations on the MV Station only when all devices inside the MV Station, esp. the
MV Station are completely voltage free.
Avoid any accidental re-connections.
Verify that no voltage or current is present with appropriate testing devices.
Ground and short-circuit whenever necessary.
Cover possible live parts to avoid accidental contact.
Ensure sufficient escape room.
Wait at least 5 minutes after the MV Station stops completely to operate the module.

System Manual 2 Safety Instructions
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2.2.8 ESD Protection
Devices may be damaged irreversibly by electrostatic discharge (ESD).
Avoid unnecessary touching of the PCB.
Observe all the ESD-related safety instructions. Take proper personal protective
equipment (PPE), like wear wrist strap.
2.2.9 LCD Parameter Setting
Certain LCD settable parameters are closely related to the MV Station and internal devices
operation, therefore these parameters can only be set after reliable evaluation of the
system.
Improper parameter setting may affect the functionality of the device.
Only qualified personnel can set the parameters.
2.2.10 Sand and Moisture Protection
Do not open the MV Station door in sand storm, thunderstorm, strong wind or hail days or
when the ambient humidity is above 95%.
2.2.11 Symbols on the Device Body
Symbols on the device body contain important information on the safe operation of the MV
Station and its internal devices. Do not tear or damage them!
Do not damage or tear the symbols.
All symbols on the device body must be clearly visible.
Replace the symbols once any damaged or unclearness is detected.
2.2.12 Safety Warning Signs
During transport, installation, maintenance and troubleshooting of the MV Station, keep
non-related persons away.
Post warning signs near the MV Station upstream and downstream switches to prevent
accidental connection.
Place necessary warning signs or barriers near the on-site operation areas.
2.2.13 Daily Operation and Maintenance
Make sure the MV Station doors are closed and locked during daily operation to prevent
internal devices from damages by rain or rodents.
Routine check and maintain the MV Station and internal devices to ensure long and reliable
operation of the MV Station.

2 Safety Instructions System Manual
8
Make proper insulation protection during live line operation. At least two persons
are required until the operation is done.
Proper field rescue facilities are necessary since the location of most MV Station
is far away from the urban areas.
Take the followings into consideration during daily operation and maintenance:
Nameplates are pasted on the MV Station internal devices, like the module, DC cabinet
and etc. They contain very important parameter information about the devices. Protect
the nameplates during all operations.
Heating components may exist inside the MV Station. When the device stops, the
heating components may still be hot. Wear proper glove when working on them.
Maintain the cooling fans inside the MV Station and inside the MV Station only when the
fans stop rotating.
Wear proper PPE, such as safety glasses, safety footwear and safety gloves if
necessary.
All necessary auxiliary measures are advisable to ensure the personal and device
safety
2.2.14 Disposal of Waste
When the MV Station or internal devices is end of life, it cannot be disposed of together with
household wastes. Some components inside can be recycling and some components can
cause environmental pollution.
Please contact the local authorized collection point.
2.2.15 Manual Description
For user‟s convenience, there are a large number of pictures in this manual.
These pictures are indicative only. For details about the device, please refer to
the actual product you receive.
Keep this manual at a convenient place near the device for future reference
during installation, operation, maintenance and troubleshooting of the device.
All the descriptions in this manual are for the standard MV Station. Please
inform us in the purchase order if you have specific requirements. The actual
product you receive may differ.
This manual may not cover all possible situations. Should a specific problem
occur that is not explained in this manual, please contact Sungrow.
2.3 Safety Instructions of Each Working Area
The MV Station can be divided into MV Station room, and transformer room. To make sure
the device safety and efficient operation, the abovementioned two parts are designed
relatively independently. Please follow corresponding safety instructions when working in
the three areas.

System Manual 2 Safety Instructions
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2.3.1 Safe Operation of the MV Station room
Perform the operations in this section before any operation on the MV Station
room. Physical injury or device damage may follow if otherwise.
Step 1Identify the MV Station and read the safety instructions on the MV Station cabinet carefully.
Step 2Disconnect all power supplies from the MV Station, including MV Station upstream and
downstream devices and other connected power supplies. In addition, place warning
signals to prevent accidental reconnection.
1. Stop the module. Wait at least 5 minutes after the MV Station is stopped. Open the
cabinet door after all the internal capacitor is discharged completely
2. Disconnect the transformer downstream switch. Disconnect other power supplies
connected to the MV Station, for example, the grid and sub-stations in parallel
connection.
3. Disconnect all DC power supply to the MV Station. Disconnect the output circuit
breakers of the MV Station upstream combiner box.
Step 3Make sure all operation areas are voltage-free. Measure the MV Station AC and DC
connection terminals and other operational areas using multimeter to make sure they are
all voltage-free.
Step 4Temporarily ground the AC and DC sides of the two modules by using proper temporary
grounding devices.
2.3.2 Safe Operation of the Transformer Room
Perform the operations in this section before any operation on the transformer
room. Physical injury or device damage may follow if otherwise.
Step 1Identify the transformer and read the safety instructions on the transformer cabinet
carefully.
Step 2Disconnect all power supplies from the transformer, including transformer upstream and
downstream devices and other connected power supplies. In addition, place warning
signals to prevent accidental reconnection.
1. Stop the module.
2. Disconnect the transformer downstream switch. Disconnect other power supplies
connected to the transformer, for example, the grid and sub-MV Stations in parallel
connection.
Step 3Make sure all operation areas are voltage-free.
Step 4Make sure the transformer is voltage-free. High voltage side connection terminals, low
voltage side connection terminals and all possible auxiliaries are voltage-free.
Step 5Measure the high voltage terminal with proper high voltage tester to make sure the high
voltage side is voltage free; measure the low voltage side terminal with proper test probe to
make sure the low voltage side is voltage free.
Step 6Ground the MV Station
1. Temporarily ground the AC side of the two modules by using proper temporary
grounding devices.
2. Turn the earthing switch to the earthed position.

10
3 Product Description
3.1 Brief Introduction
The MV Station mainly applies to medium and large-scale PV generation systems. Based
on standard-sized outdoor container, the MV Station integrates DC cabinet, module cabinet,
transformer, security system and firefighting equipment to meet with the requirements of
modular design and fast installation of the PV systems.
The MV Station converts DC current generated from the PV array into grid-compatible AC
current, which can be directly fed into the medium voltage grid.
3.2 MV Station Internal Construction
The MV Station is made up of the following two parts:
12
Fig. 3-1 MV Station internal construction
Item
Name
Description
1
Module room
Integrate DC cabinet, MV Station cabinet, and etc. Convert the DC
current generated from the PV array into AC current.
2
Transformer
room
Integrate one transformer. Convert the output low-voltage AC
current into grid-compatible medium-voltage level.

System Manual 3 Product Description
11
3.3 Overall Design of the MV Station
3.3.1 MV Station Views
View
Description
A
Front view.
„A‟is the LCD protective box.
Back view.
Left view.
Right view.

3 Product Description System Manual
12
Control and Monitoring Window
The Control and Monitoring window is located on the front door.
On the top is the LED indicator; in the middle is the color liquid crystal touch screen and on
the bottom are the emergency stop button, the “AC” knob switch, the “DC”knob switch,
“AUX SUPPLY” knob switch, the maintenance interface and etc. Please refer to the figure
below.
LCD
LED indicator
The working status of the MV Station can be acquired through these LEDs.
LED
Color
Description
POWER
Green
The control circuit power supply is supplying power.
OPERATION
White
The MV Station is in stop mode.
Green
The MV Station is in grid-connected run mode.
Yellow
The MV Station is in alarm run mode.
FAULT
Red
A fault occurs and has not been removed.
The LED will be off when the fault is cleared.
Buttons
The functions of each button are shown in the table below.
Button
Description
DC
Press this button to disconnect the DC switch
AC
Press this button to disconnect the AC switch
AUX. SUPPLY
Press this button to disconnect the auxiliary power supply of the
intelligent power distribution cabinet
EMERGENCY STOP
When an emergency occurs, the DC and AC circuit breakers
disconnect automatically after pressing the emergency stop button.
The MAINTENANCE INTERFACE
The MAINTENANCE INTERFACE on the bottom is the standard Ethernet port for
maintenance only.
The cover plate of the LCD can only be opened by special key. Please remove
the key and store it properly after the operation to the LCD.