Page 1 User Manual MV Power Converter SC2400UD-MV-US/SC2750UD-MV-US/SC3150UD-MV-US/ SC3450UD-MV-US/SC4000UD-MV-US/SC5000UD-MV-US SC2400UD-MV-US/SC2750UD-MV-US/ SC3150UD-MV-US/SC3450UD-MV-US/SC4000UD-MV-US/SC5000UD-MV-US Power ConverterUser Manual SC2400_2750_3150_ M-H-002053 3450_4000_5000UD-MV-US-SEN-Ver116–202406 SC2400_2750_3150_3450_4000_5000UD-MV-US-SEN-Ver116–202406...
Page 3: Table Of Contents
Contents 1 About This Manual ...................1 1.1 Validity......................1 1.2 Contents ......................1 1.3 Target Group ....................2 1.4 Symbols Explanation ..................2 1.5 How to Use this Manual ..................3 2 Safety Instructions ....................4 2.1 Intended Usage....................4 2.2 Important Safety Instructions ................5 2.2.1 General Safety Rules ................5 2.2.2 Manual Storage ..................6 2.2.3 Battery Protection .................6 2.2.4 Live Line Measurement .................7...
Page 4 3.4.1 Internal Devices of the Power Converter Unit ........16 3.4.2 Operations on the DC and AC Side ............17 4 Delivery and Storage ..................19 4.1 Scope of Delivery ..................19 4.2 Identifying the MV Power Converter ...............20 4.3 Transportation Requirements Before Storage ..........20 4.4 Checking for Transport Damages..............20 4.5 Storage Requirements ..................21 4.5.1 Storage Environment................21...
Page 5 6.2.5 Cable Specifications................41 6.2.6 Cable Inlet/Outlet Design ..............43 6.2.7 Cable Crimping ...................44 6.2.8 Parts for Cabling .................45 6.2.8.1 Copper Wire Connection ............46 6.2.8.2 Aluminum Wire Connection ............47 6.3 Circuit Diagram and Cable Connection............48 6.3.1 Circuit Diagram ...................48 6.3.2 Cable Requirements................49 6.4 Ground Connection ..................50 6.4.1 Brief Introduction.................50 6.4.2 Equipotential Connection of Internal Devices.........50...
Page 6 8.1.1 Inspection Before starting ..............70 8.1.2 Start Steps ..................70 8.2 Stopping ......................72 8.2.1 Normal Stop ..................72 8.2.2 Stop in Case of Fault or Emergency............73 9 Web Operation ....................74 9.1 Running Environment Requirements..............74 9.2 Login Steps....................74 9.3 Web Main Interface..................74 9.4 Web Menu ....................76 9.5 Operation Procedure ..................76 9.6 Overview .....................77 9.6.1 General Information ................77...
Page 7 9.9.3 Parameter Log ..................82 9.9.4 Measuring Point Log ................82 9.10 System ......................82 9.10.1 System Maintenance .................82 9.10.1.1 System Update................82 9.10.1.2 Rebooting ................83 9.10.1.3 Reset All Settings ..............83 9.10.2 System Time..................83 9.10.3 Transfer Configuration ...............84 9.10.3.1 IEC104 ...................84 9.10.3.2 Server Mode................84 9.10.3.3 MODBUS ................84 9.10.4 Template Management ..............84 9.10.5 Port Parameter .................85...
Page 8 10.7 Remote Control Function................102 11 Cyber Security Protocol ................105 11.1 Password Change Requirements ............... 105 11.2 Port Protection and Isolation ..............105 11.3 Network Cables and Tamper Evident Seals Inspection......... 105 12 Cybersecurity Best Practice ..............107 13 Troubleshooting ..................
Page 9: About This Manual
About This Manual Validity This manual is intended for the following products: • SC2400UD-MV-US • SC2750UD-MV-US • SC3150UD-MV-US • SC3450UD-MV-US • SC4000UD-MV-US • SC5000UD-MV-US Hereinafter they will be referred to as "MV power converter" unless otherwise specified. MV is short for "Medium Voltage".
Page 10: Target Group
1 About This Manual User Manual Target Group This manual is for technical personnel who are responsible for the transport, installation, commissioning and other operations of the MV power converter. Only qualified personnel can perform the installation, maintenance and troubleshooting of the MV power converter. Unauthorized persons should not perform any operation on the MV power converter and should be away from the MV power converter to avoid potential hazards.
Page 11: How To Use This Manual
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.
Page 12: Safety Instructions
Safety Instructions Intended Usage The MV power converter developed and manufactured by SUNGROW is mainly applied to large-and-medium energy storage power plants. It adopts a modular design for quick instal- lation and is equipped with the power converter units, medium voltage transformer, and monitoring system, ensuring a reliable and safe grid-connected generation for a long time.
Page 13: Important Safety Instructions
Installation of the MV power converter 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 perti- nent warranty claims from SUNGROW.
Page 14: Manual Storage
2 Safety Instructions User Manual The equipment must be dried after passing through condensing environment, and it is recommended to dry it under ventilation for at least 24 hours. Before running the equipment, insulation resistance test shall be performed, and then withstand voltage test after the insulation resistance test is passed: •...
Page 15: Live Line Measurement
User Manual 2 Safety Instructions If the battery needs to be reconnected after the switch or circuit breaker on battery output side is turned off, ensure that: • The MV power converter is shut down, and the MV power converter has been stopped for at least 5 minutes.
Page 16: Esd Protection
2 Safety Instructions User Manual 2.2.7 ESD Protection Devices may be damaged irreversibly by ESD (Electrostatic Discharge). • Avoid unnecessary touching of the PCB (Printed Circuit Board). • Observe all the ESD-related safety instructions. Wear proper PPE (Personal Protective Equipment), like wrist strap. 2.2.8 Web Parameter Setting Some configurable Web parameters are closely related to the operation of the MV power converter and internal devices, therefore these parameters can only be modified after reli-...
Page 17: Daily Operation And Maintenance
User Manual 2 Safety Instructions 2.2.12 Daily Operation and Maintenance Make sure the MV power converter doors are closed and locked during daily operation to prevent internal devices from damages by rain or rodents. Routine check and maintain the MV power converter and internal devices to ensure long and reliable operation of the MV power converter.
Page 18 If necessary, specify your require- ments when placing the order. This manual may not cover all possible situations. Should a specific problem occur that is not explained in this manual, contact SUNGROW.
Page 19: Product Description
Product Description Brief Introduction The MV power converter manufactured by SUNGROW is designed to control the charging and discharging of lithium battery PACKs and serve as an intermediate link between the grid and the energy storage system across various application scenarios (such as grid-con- nected systems, islanded systems, and hybrid systems).
Page 20: Overall Design Of Mv Power Converter
3 Product Description User Manual Overall Design of MV Power Converter Description Item Name It is used for bidirectional conversion between DC and AC, thus enabling the energy storage batteries to charge and Power convert- discharge. The unit with an operation panel on its front door er units is the master unit, and the other is slave unit.
Page 21 User Manual 3 Product Description LED Indicator The working status of the MV power converter can be acquired through these LEDs. Description Color The control circuit power supply is supplying power. POWER Green MV power converter is in stop mode. White MV power converter is in grid-connected run mode.
Page 22 3 Product Description User Manual Description LED status “POWER” is on green A fault occurs and has not been removed “FAULT” is on red The MV power converter is disconnected All LEDs are off from the power supply Emergency Stop Button In the case of an emergency, press the emergency stop button on the MV power converter, and it will stop running immediately.
Page 23: Mechanical Parameter
External dimensions (without eaves) are shown in figure below. figure 3-2 Appearance and Dimensions of The MV Power Converter Clearance Spaces The clearances around the MV power converter should be sufficient for the door to be opened. Weight Weight Model SC2400UD-MV-US SC2750UD-MV-US 16000kg SC3150UD-MV-US SC3450UD-MV-US 17000kg SC4000UD-MV-US 18000kg SC5000UD-MV-US 3.3.3 Ventilation Design...
Page 24: Internal Design Of Power Converter Unit
3 Product Description User Manual • Please carry out regular inspections on wire meshes on the air inlets of the top eaves and the air outlets at the bottom of the power converter units, and perform maintenance such as cleanup. •...
Page 25: Operations On The Dc And Ac Side
User Manual 3 Product Description *The figure above is indicative only. Description Remark Name Provide DC input for control power supply DC maintenance switch Disconnect Q1 for isolation during power failure External power sup- Provide external input for distribution transformer ply control switch Internal power sup- Provide internal power supply for distribution...
Page 26 3 Product Description User Manual Description Name The switches is turned on when this button is pressed. Push ON button Display the present energy storage state, CHARGED Energy storage state SPRING or DISCHARGE SPRING. indicator The DC load switches/AC circuit breakers can be used together with a motorized kit.
Page 27: Delivery And Storage
Delivery and Storage Scope of Delivery Device Note MV power converter System manual, warranty card, quality certificate, and FQC Enclosed test report documents M12×55 Hexagon head bolt (for DC side) M10×25 Stainless steel hexagon head bolt (for grounding) M8×25 Hexagon head bolt (for fuse fixing) Bolt M6×20 Cross combination bolt (for grounding copper bar conductor)
Page 28: Identifying The Mv Power Converter
MV power converter, a detailed inspection is necessary. If any damage is detected, contact the shipping company or SUNGROW immediately. A rel- evant photo is preferred. We will provide you with the fast and best service.
Page 29: Storage Requirements
User Manual 4 Delivery and Storage If any damage is detected, contact the shipping company or SUNGROW immediately. Install and commission the MV power converter only when it is technically fault- less! Before installation, make sure that: • The MV power converter is intact without any damage;...
Page 30: Protection During Storage
IGBT (Insulated Gate Bipolar Transistor) modules and switches. Additionally, take dehumidification and dedusting measures for the entire product. For detailed in- structions, please contact SUNGROW. • The UPS and their batteries must be charged once every six months after leaving the...
Page 31: Mechanical Mounting
Mechanical Mounting Respect all local standards and requirements during mechanical installation. Transport All devices are installed inside the MV Power Converter before delivery, and the MV Power Converter should be transported as an integrated unit. The MV Power Converter is delivered to the user by a forwarding company. After unloading, the MV Power Converter is transported to the installation site by the energy storage power plant staff.
Page 32: Hoisting Mv Power Converter
– If the system includes a SUNGROW battery cabinet and a firewall is present on site, ensure that the designated area for the battery cabinet is ≥ 150 mm away from the firewall.
Page 33 Please use the lifting devices provided by SUNGROW (slings, shackles, and lifting beams). • If it is necessary to use slings and shackles that are not provided by SUNGROW due to special circumstances, ensure that the selected lifting devices meet the requirements specified in "5.2.2 Hoisting...
Page 34: Hoisting System
5-1 Hoisting System Lifting Devices The crane comes with a lifting hook. SUNGROW does not provide the other lifting devices. Users need to prepare their own lifting devices that meet the lifting specifications. As listed in the table below.
Page 35: Hoisting Procedure
National and local safety rules should be observed at all times. • Regardless of relevant safety rules may void pertinent warranty claims from SUNGROW. 5.2.3 Hoisting Procedure Step 1 Secure the lifting devices. Pass the four loops of slings respectively through the four connectors.
Page 36: Foundation
Ensure the equipment is securely and fully seated on the foundation within the designated area and neatly positioned. Verify that the equipment is free from deformation and that its doors open and close smoothly. After hoisting, properly store the lifting devices provided by SUNGROW for future use. Foundation 5.3.1 Installation Site Selection When selecting the installation site, consider at least the following requirements: •...
Page 37: Foundation Requirements
User Manual 5 Mechanical Mounting 5.3.2 Foundation Requirements Pay attention to the heavy weight of the MV power converter. Check thoroughly the conditions of the installation site (mainly the geographical and environmental con- ditions). Then design and construct the foundation. Improper foundation construction may affect the opening and close of the door and later maintenance of the MV power converter.
Page 38 5 Mechanical Mounting User Manual figure 5-2 The Views of The Oil Tray Name Installation hole for drain valve Lifting rings The position marked in the figure is for reference only, and it may vary with actual onsite conditions. Transport the Oil Tray Hoist the oil tray and transport it to the target location via the lifting rings at four corner of the oil tray (shown by "B"...
Page 39: Installing Drain Valve (Optional)
User Manual 5 Mechanical Mounting • Oil tube (beyond the scope of delivery) Figure Step 1. The oil tray is prepared before delivery. 2. First fix the sealing ring and then the ball valve onto the oil tray. 3. Insert the connector into the ball valve, as shown in the left figure.
Page 40: Recommended Foundation Construction Plan
5 Mechanical Mounting User Manual Installation Parts Before installing the drain valve, the required parts: • Connector(in the scope of delivery) • Drain valve(in the scope of delivery) • Oil pipe (beyond the scope of delivery) Installation Methods Step 1 Screw the connector into the mounting hole at the bottom of the MV power converter. Step 2 Install the drain valve on the connector.
Page 41: Other Precautions
User Manual 5 Mechanical Mounting The pre-embedded channel steel must be horizontal with the upper surface of the rest part of foundation; the pre-embedded steel sheet must be firm and reliable. According to the on-site actual conditions, a drainage system is designed and constructed at the bottom of foundation to avoid steeper.
Page 42: Fixing
5 Mechanical Mounting User Manual Fixing Hoist the product to the intended location and fix it. Fixed by Welding Secure the bottom of the product to the foundation by welding. Take proper measures to pre- vent the welding point from corrosion after welding. Fixing by L mounting parts Fix the fixing point at the bottom of the MV power converter (shown as A below) with the ex- isting operating platform using L mounting parts.
Page 43: Remove The Films
User Manual 5 Mechanical Mounting figure 5-3 The Position of Beam For safety, it is recommended that two persons work together to remove the beam simultaneously. Begin by removing the bolts at the top, followed by those at the bottom. Remove The Films Before the first on-site commissioning of the MV power converter, remove the 3M films on the air inlet and outlet of the MV power converter.
Page 44 5 Mechanical Mounting User Manual figure 5-4 The Position of Films This section uses the power converter unit as an example. The above figures are for reference only, please refer to the actual product received. The sealing films at the air inlets and outlets of the transformer room and the MV power converter must be removed before the system starts running for the first time.
Page 45: Electrical Connection
Electrical Connection Safety Instructions 6.1.1 General Rules High voltage! Electrical shock! • Do not touch the live component! • Ensure that both the AC and DC sides are voltage-free before installation. • Do not put flammable materials near the MV power converter. •...
Page 46 Only qualified electricians can perform the electrical connection. Qualified electri- cians should meet the related requirements listed in “Safety Instructions” in this manual. SUNGROW shall hold no liability for any personal injury or property loss caused by ignorance of the safety instructions.
Page 47: Five Safety Rules
User Manual 6 Electrical Connection 6.1.2 Five Safety Rules During electrical connections and other operations on the internal devices, observe the fol- lowing five safety rules: • Disconnect all external connections and the MV power converter internal power supply. • Avoid accidental reconnection to power.
Page 48: Checking Cables
6 Electrical Connection User Manual Unlock all six door locks with keys to open the cabinet door. Be sure to secure all door locks reliably when closing the cabinet door to avoid ac- cidents caused by poor protection. 6.2.3 Checking Cables Check to ensure the intactness and insulation of all cables before electrical con- nection.
Page 49: Cable Specifications
User Manual 6 Electrical Connection 6.2.5 Cable Specifications Choose cables according to the requirements below: • All cables must have sufficient ampacity. The conductor ampacity is related to environ- mental conditions, conductor insulation materials, laying, wire material and cross-sec- tional area, etc. •...
Page 50 6 Electrical Connection User Manual Connec- Specifications Requ. Cable Note tion holes Can communi- 0.75 mm cation cable Network cable Standard network cable table 6-2 Cable Specification of Multi-branch Version Connec- Specifications Requ. Cable Note tion holes Alumi- num/Cop- per ca- Each The cross-sectional area of the bles can...
Page 51: Cable Inlet/Outlet Design
User Manual 6 Electrical Connection The MV power converter can provide power to both internal and external devices. Supplying power to internal devices is a default standard configuration, and sup- plying power to external devices is an optional function. • For DC cables, ensure that the positive and negative cables are laid at a safe distance as much as possible to avoid crossing and reduce the possibility of short circuits.
Page 52: Cable Crimping
6 Electrical Connection User Manual Cable Inlet/Outlet Preparation There are cable inlets/outlets reserved on the bottom of the MV power converter, through which all cable connecting to external devices are led into the MV power converter. Unscrew the screws on the bottom cover plate. Remove the bottom cover plate.
Page 53: Parts For Cabling
User Manual 6 Electrical Connection Step 1 Strip off the insulation layer of the cable by an appropriate length, which should be 5 mm lon- ger than the depth of the cable lug; Step 2 Insert the heat shrink tubing; 1.
Page 54: Copper Wire Connection
6 Electrical Connection User Manual • Long bolts may affect the insulation and may cause short circuit. • Remove the heat shrink tubing between the cable lug and the copper bar if nec- essary. Poor contact or over-heating may follow if otherwise. Clean the terminals before cable connection.
Page 55: Aluminum Wire Connection
User Manual 6 Electrical Connection 6.2.8.2 Aluminum Wire Connection When a aluminum wire is selected, a copper-aluminum composite terminal is needed as shown below: figure 6-3 Copper-aluminum composite terminal of single-hole cable connection figure 6-4 Copper-aluminum composite terminal of double-hole cable connection Name Name Copper bus...
Page 56: Circuit Diagram And Cable Connection
6 Electrical Connection User Manual figure 6-5 Copper-aluminum Composite Sheet Connection Sequence *The figure above is indicative only. MV power converter copper Copper-aluminum compo- Terminal site sheet Circuit Diagram and Cable Connection 6.3.1 Circuit Diagram 1/2–Power converter unit; 3–Transformer Item Name DC input A1/A2...
Page 57: Cable Requirements
User Manual 6 Electrical Connection The auxiliary power supply is reserved to power the battery container, and the power does not exceed 100kVA. Power converter units are connected to the low-voltage winding in transformer re- spectively, and require attention when running in parallel. •...
Page 58: Ground Connection
6 Electrical Connection User Manual Cable Specification Item CAN communication 2×0.75 mm shielded twisted-pair cable cable Network cable Standard shielded network cable Cable overload is strictly prohibited! • The cable sizes mentioned in the table above are applicable to copper cables only.
Page 59: External Grounding
User Manual 6 Electrical Connection • Measure the electrical conductivity between the device ground terminals and the total equipotential connection copper bar to ensure the effectiveness of the internal ground connection; • Ground the shielding layers and protection layers of the cables connected to the MV power converter outside.
Page 60 If you have any doubts during the ground cable connection, please contact the re- lated technical personnel in time. Any installations not following the standards or installation and alternation without permission may lead to safety incidents or damage to the devices. SUNGROW shall hold no liability for the damages caused.
Page 61: Ac Connection
User Manual 6 Electrical Connection AC Connection 6.5.1 Safety Instructions Incorrect AC connection may cause damages to the MV power converter. Electrical shock hazards! • Do not touch the live components. • Ensure all terminals are voltage-free. • The connections to the downstream devices must be carried out only after re- ceiving approval from the distribution utility as required by national and state interconnection regulations.
Page 62 6 Electrical Connection User Manual Wiring Area Note: The figure is for reference only, and the actual product may differ. Wiring Steps Step 1 Drill holes on the bottom sealing plate of the HV cabinet according to local standards and regulations.
Page 63 User Manual 6 Electrical Connection Step 3 Prepare the terminals and install them tightly, where reference can be made to the installation manual of the cable connector. Both cooper-core cable and aluminium-core cable are applicable. In case of copper-core cables, use copper wiring terminals. In case of aluminium cables, use copper-to-aluminium adapter terminals.
Page 64: Dc Connection
6 Electrical Connection User Manual After completing wiring, fix the cable on the beam (not included in the scope of supply) to avoid excessive stress on the cable. Seal the bottom cable entries with fireproof mud (foaming materials), remove debris in the HV cabinet, close and lock the cabinet door.
Page 65: Dc Cable Connection
User Manual 6 Electrical Connection 6.6.2 DC Cable Connection UD series MV power converter support a single DC input and multiple DC inputs. Overview DC side terminals of a single-branch MV power converter are shown in the figure below. figure 6-7 DC Side Terminals of Single Branch Version For multi-branch MV power converter, the number of branches varies from model to model.
Page 66 6 Electrical Connection User Manual Step 3 Connect the cable that has been crimped beforehand; Select bolts matching the cable lug. Recommended specification: M12×50. Attach the cable lug to the DC connection copper bar following the double-hole cable connection sequence of copper wire and aluminum wire. Fasten the bolts with a screwdriver or a spanner with recommended torque.
Page 67: External Power Supply Connection
User Manual 6 Electrical Connection Step 5 Confirm that all cable connections are secure. Finish the DC cable connection of other input of the MV power converter following the above steps. The bottom cover plate at the cable entry cannot be discarded during cable wiring and must be reinstalled to ensure protection for internal equipment.
Page 68 6 Electrical Connection User Manual figure 6-9 External Power Supply Interface Disconnect the internal power supply control switch Q3 and close the external power supply control switch Q2 for external power supply. Procedure Step 1 Lead the communication cable to the wiring area. Step 2 Strip the protective layer of the cable using wire strippers to expose the copper wire.
Page 69: Communication Connection
User Manual 6 Electrical Connection Step 4 Connect the cable to the designated position. Then, pull gently the cable backward to ensure the connection is secure. - - End Communication Connection There are several communication ports reserved for external connection: 2 internet commu- nication ports;...
Page 70 6 Electrical Connection User Manual • Reinstall the DC side protective cover to ensure protection for internal equipment. • Carry out water-proof treatment to the base of the MV power converter. • Check all air inlets and outlets for blockage. The MV power converter is equipped with a pressure relief device, which is temporarily fixed with screws to prevent its accidental falling off during transportation.
Page 71 User Manual 6 Electrical Connection Step 2 Remove the screw from the bottom pressure relief device. - - End...
Page 72: Commissioning
Commissioning Safety Instructions High voltage! Electric shock! • Wear proper protection equipment before all operations on the device. • Do not touch the live terminals or conductors. • Respect all safety instructions attached on the device and described in this manual.
Page 73: Requirements Of Commissioning
User Manual 7 Commissioning Requirements of Commissioning Before commissioning, installation of all the devices inside the MV power converter should be checked thoroughly. • Ensure all cables are connected securely and all bolts are fixed properly. • Ensure DC side voltage meets power converter unit requirements and the polarity is correct.
Page 74: Checking The Power Converter Unit
7 Commissioning User Manual • Check that all cables are connected securely according to the cable connection diagram. Adjust the cable connection if necessary. • Ensure all cable connections are firmly enough. Fix the bolts if necessary. • Check the PE equipotential connection. Ensure the PE ground copper bar has connected to the equipotential connection point in the electrical room and properly grounded.
Page 75: Checking Grid Voltage
User Manual 7 Commissioning 7.3.4 Checking Grid Voltage • Measure accurately the grid 3-phase line-to-line voltages: L1-L2, L1-L3, and L2-L3. The voltages should not exceed the grid permissible voltage, and the three phases are in balance. Adjust the transformation ratio of the transformer by qualified personnel if the grid voltage deviation is serious.
Page 76: On-Site Commissioning Of Two Stage Energy Storage Mode
7 Commissioning User Manual • Record accurately the operation data during commissioning. The duration of commissioning depends on the plant scale, plant location, on-site environ- mental conditions and so on. Usually, if the in-site condition is good, the commissioning can last for 1 week, i.e.
Page 77 91V, and the difference of the other mod- els is about 180V if the two stage energy storage mode is enabled. - - End Please contact SUNGROW if the IP address of the MV power converter and the BSC needs to be modified on site.
Page 78: Starting/Stopping
Starting/Stopping Starting 8.1.1 Inspection Before starting After the maintenance or service work, inspect the following items, and then start the MV power converter. • All connections are performed by strictly following the installation manual and circuit diagram. • The coverings of the internal devices are fixed and secured. •...
Page 79 User Manual 8 Starting/Stopping Step 2 Power on the power converter units Verify that the AC circuit breaker and DC load switch inside the MV power converters are all in the open state. Verify that the emergency stop button is released and the start/stop knob is in the start (ON) position.
Page 80: Stopping
8 Starting/Stopping User Manual Click Boot to start up the MV power converter, or click Standby to keep it waiting for schedules in the hot standby state. If the running status on the Web page shows "Fault" or "Alarm", check the de- tailed information in the fault or alarm record.
Page 81: Stop In Case Of Fault Or Emergency
User Manual 8 Starting/Stopping Step 2 Power off the transformer Open the door of the transformer control room. Switch off the load switch using the operating lever. Close the door of the transformer control room. - - End Do not turn off any AC circuit breakers and DC load switches during normal opera- tion.
Page 82: Web Operation
Web Operation Running Environment Requirements Item Parameter Browser Chrome 65 above Min. resolution 1024 x 768 Login Steps Connect the SCU (Smart Control Unit) to the PC network card. Configure the IP of the PC to a network segment the same as that of the ETH2 port. The IP of ETH2 port is 192.168.13.127 by default, and therefore, the IP of the PC can be set to 192.168.13.X, and the subnet mask is 255.255.255.0.
Page 83 User Manual 9 Web Operation Description Item Name Navigation Display main function modules of the Web. menus Function dis- Display the current interface. play area Display the current alarm level and alarm number. Users can Alarm icon click the icons to enter the corresponding alarm interface. Help Display the basic configuration steps of the SCU.
Page 84: Web Menu
Refer to the chapter “[System Time]”. Step 4 Automatically search the device. Devices that can be automatically searched, such as SUNGROW power converter, can be added via the auto search function with addresses allocated automatically. Refer to the chapter “[Device List]”.
Page 85: Overview
User Manual 9 Web Operation - - End Overview 9.6.1 General Information Click “[Overview]→ [General Information]” to enter the corresponding interface. Shotcut Menu Device Setup: devices can be automatically searched and added. Click the menu to add, de- lete, modify, and view the device. Perform auto search to search devices meet conditions and to automatically allocate addresses.
Page 86: Real-Time Status
9 Web Operation User Manual System Maintenance: perform operations such as system upgrade, system rebooting, and restoring factory default. Refer to the chapter “[System Maintenance]”. Device Instruction: perform operations, such as start, stop, and standby. Power flow View power flow of the MV power converter. Data Index View information such as Daily Discharge, Cumulative Discharge, Daily Charge, Cumulative Charge, Real-time Active Power, Real-time Reactive Power, Offline Device, and Online...
Page 87: Operation Parameters
User Manual 9 Web Operation - - End 9.7.3 Operation Parameters It is recommended that the input voltage of the DC battery of two power converter units sharing a transformer in the MV power converter be controlled within 100V, and excessive voltage difference will affect the performance of the parallel system. It is recommended that the power dispatching mode of two power converter units sharing a transformer in the MV power converter should be consistent, the charge and discharge modes should be consistent, and the active mode or reactive mode...
Page 88: Device Instruction
9 Web Operation User Manual Step 2 Set the start time and end time, and the start time should be earlier than the end time. Step 3 Set the power, which can be set to a value ranging from -110 to 110. Step 4 Select the desired setting, and click “[Setting]”...
Page 89: Edit Device
Step 3 Click “[Confirm]” on the pop-up window. - - End 9.8.2 Firmware Update Click “[Firmware Update]” to upgrade the firmware of SUNGROW MV power converter con- nected to the SCU. Step 1 Click ““[Device]→[Firmware Update]”” to enter the corresponding interface.
Page 90: History Data
9 Web Operation User Manual - - End History Data 9.9.1 Operation Log Step 1 Click ““[History Data]→[Operation log]”” to enter the corresponding interface. Step 2 On this interface, users can view history information. - - End 9.9.2 Historical Status Step 1 Click “[History Data]→[Fault History]”...
Page 91: Rebooting
User Manual 9 Web Operation Step 3 Click “Upgrade” on the pop-up version information window. The system enters upgrading state. - - End The upgrade file must be the ".scu" file. If there is no new measuring point function, there is no need to re-select the tem- plate and default configuration for the template upgrade in the scu software;...
Page 92: Transfer Configuration
9 Web Operation User Manual It is recommended to select "User Define" during debugging. When the clock source is set to "NTP", time of all devices can be synchronized. Click the "Time zone" drop-down-list to select the local time zone. Fill in "Domain", set the time in- terval, and click [Save], so that the SCU time is synchronized with server time.
Page 93: Port Parameter
User Manual 9 Web Operation Step 3 Click “[Upload template]”, to upload the configuration file. Step 4 Click [ ] to apply the template. Step 5 Click [ ] to download the template. - - End 9.10.5 Port Parameter Click “[Port Parameter]” to set port parameters of the SCU. 9.10.5.1 RS485 Step 1 Click ““[System]→[Port Parameter]→[RS485]””...
Page 94: S/N
9 Web Operation User Manual - - End 9.10.5.4 DI Step 1 Click ““[System]→[Port Parameter]→[DI]”” to enter the corresponding interface. Step 2 Click [ ] of [Node name] and [Type],configure according to the project configuration table. click the button [ ] to save the operation. Step 3 It takes effect after manually restarting the software.
Page 95: Main Functions
10 Main Functions 10.1 Operation Mode 10.1.1 Basic Functions On-grid Operation The power converter unit is designed with perfect on-grid operation function and can flexibly adapt to different batteries to control charging and discharging. Charging/discharging mode and charging/discharging instruction are set through the PC or on the user interface. The specific operation modes are as follows: On-grid constant power (AC), on-grid constant power (DC), on-grid constant voltage, and on-grid constant current are set according to dispatch instructions and available in both...
Page 96 10 Main Functions User Manual power by activating the VSG function. During off-grid operation, the power converter unit can activate the VSG function to provide an AC voltage source to support the load. In this case, the amplitude and frequency of the AC voltage source are automatically adjusted ac- cording to the load attributes.
Page 97 User Manual 10 Main Functions Desciptions Range Parameter Default Over-frequency derating start point on fpwrdec 60.1 45Hz-65Hz P(f) curve Under-frequency rising start point on P fpwrinc 59.9 45Hz-65Hz (f) curve 0~200%Pn/ Power derating gradient on P(f) curve PdecGrad 100% Pn/Hz 0~200%Pn/ Power rising gradient on P(f) curve PIncGrad...
Page 98 10 Main Functions User Manual Desciptions Range Parameter Default PU Voltage De- Under-voltage derating start point on crease Start 94.0% Un 90%~100% P-U curve - Charge Point PU Voltage De- Under-voltage derating end point on P- crease End 90.0% Un 80%~100% U curve - Charge Point...
Page 99 User Manual 10 Main Functions Desciptions Range Parameter Default Deadzone voltage range (%) Deadzone 0%~5% Minimum reac- Inductive Q/Sn value of point P4 in the 0%~50% tive power ratio Q(U) mode curve Maximum reac- Capacitive Q/Sn value of point P1 in 0%~50% tive power ratio the Q(U) mode curve...
Page 100: Working State Description
10 Main Functions User Manual 10.1.2 Working State Description The power converter unit can be in "key stop", "standby", "running", "emergency stop", or "fault" state. Key Stop If no instruction operation or scheduling is performed on the power converter unit, the sys- tem is in the stop state after initial stop.
Page 101: Mode Switching
User Manual 10 Main Functions Fault When faults occur in the ESS(Energy Storage System), the power converter unit stops oper- ation and immediately open the DC load switch to disconnect the main circuit of the device from the battery, grid, and load. In this case, the system continuously monitors whether the fault is removed.
Page 102 10 Main Functions User Manual On-grid constant power (AC), on-grid constant power (DC), on-grid constant voltage, and on-grid constant current; All the on-grid modes are available in the charging and discharging state. It is recommended that the input voltage of the DC battery of two power converter units sharing a transformer in the MV power converter be controlled within 100V, and excessive voltage difference will affect the performance of the parallel system.
Page 103: L/Hvrt
User Manual 10 Main Functions • The power converter unit responds to VSG mode instructions only in the stop state, not the standby state. The condition under which the power converter unit can operate normally is that the protection function works well, and the battery voltage falls within the specified range.
Page 104 SRD(s), and returns to the pre-disturbance current level or percentage as defined in the requirements document within the time specified in the local standards or regulations. SUNGROW’s power converter unit meets the above mentioned requirements.
Page 105: Temperature Derating
User Manual 10 Main Functions 10.3 Temperature Derating 10.3.1 Discharge Temperature Derating figure 10-7 Discharge Temperature Derating Curve of SC2400UD-MV-US/SC2750UD-MV-US/ SC3150UD-MV-US/SC3450UD-MV-US/SC4000UD-MV-US Ambient temp. T MV power converter operation situation T<-35℃ The power converter unit starts with the aid of auxiliary heater -35℃<T≤45℃...
Page 106: Charge Temperature Derating
10 Main Functions User Manual 10.3.2 Charge Temperature Derating figure 10-9 Charge Temperature Derating Curve of SC2400UD-MV-US/SC2750UD-MV-US/ SC3150UD-MV-US/SC3450UD-MV-US/SC4000UD-MV-US Ambient temp. T MV power converter operation situation T<-35℃ The power converter unit starts with the aid of auxiliary heater -35℃<T≤45℃ Operate for a long time at 100% of the overload condition 45℃<T≤50℃...
Page 107: Altitude Derating
User Manual 10 Main Functions 10.4 Altitude Derating 10.4.1 Discharge Altitude Derating When the power converter unit working altitude is below 2000m, the power converter unit can operate at 100% of the normal. The power converter unit should derate its output power according to the curve shown below when the power converter unit working altitude is above 2500m.
Page 108: Protection Functions
10 Main Functions User Manual figure 10-13 Principle of Tripping Functions 10.6 Protection Functions The power converter unit is equipped with sound protection functions to protect the power converter unit when input voltage or grid is abnormal until the anomaly is removed and power converter unit can operate normally.
Page 109 User Manual 10 Main Functions In anti-islanding protection state, high voltage is still present inside the power con- verter unit. Disconnect the main switch and discharge before testing or maintenance. AC Over-current Protection When the battery power exceeds the power converter unit maximum DC input power, the power converter unit will limit the current to the maximum allowable AC output power.
Page 110: Remote Control Function
10 Main Functions User Manual Fan Fault Power converter unit fans can perform self-detection. When that the fans stop running is de- tected, fans will send fault information to the DSP. And the DSP will send instruction to stop the power converter unit and send warning signal and display the fault type on the Web. AD Sampling Fault If power converter unit detects that the sampling channel zero-offset value exceeds the al- lowable range, the power converter unit will send warning signals and display the fault type...
Page 111 User Manual 10 Main Functions A: Communication interfaces The figure above is indicative only, and actual product may differ. Remote Emergency Stop Remote emergency stop terminals XB10-5 and XB10-11 are reserved on the master Power converter unit. By connecting them, the power converter unit can be stopped. B: Remote emergency stop terminals The figure above is indicative only, and actual product may differ.
Page 112 10 Main Functions User Manual • It is forbidden to carry out the wiring with live electricity. Wiring should be carried out when the machine is not powered on, and 17AWG cables are recommended. • The miniature circuit breaker (recommended voltage and current are 30V/1A) is required to control the connection of remote emergency stop terminals, so as to control the operation of the power converter unit.
Page 113: Cyber Security Protocol
Users can click "Forgot Password" on the login page to reset their password. Please contact SUNGROW in case of any problems. 11.2 Port Protection and Isolation Ensure that the MV power converter is installed to provide ingress protection for the network zone and to minimize exposure of the ports.
Page 114 11 Cyber Security Protocol User Manual Ensure that all RS-485 data cables are inspected periodically for damage, wear and tear.
Page 115: Cybersecurity Best Practice
12 Cybersecurity Best Practice It’s important to locate the MV power converter in a secure network zone (e.g., SCADA (Supervisory Control And Data Acquisition) network or PCN), that is blocked from direct communication with the Internet and/or Corporate IT networks by network security devices (e.g., firewalls).
Page 116: Troubleshooting
If not, please contact SUNGROW. If the components needs to be replaced with products from other manufacturer or with different model number, a prior analysis and confirmation by SUNGROW is needed. Failure to follow this procedure may lead to physical injury or death and void all warranty from SUNGROW.
Page 117: Mv Power Converter Faults And Corrective Measures
User Manual 13 Troubleshooting • Open-circuit voltage of the storage battery • State of the emergency stop button • Grid connection status • Communication of the measurement board 13.3 MV Power Converter Faults and Corrective Measures The fault information of the MV power converter can be viewed on the WEB interface.
Page 118 920us. 3. If the fault is not caused by the foregoing reasons and still exists, please contact SUNGROW. Normally, the machine will reconnect to the grid when the DC voltage returns to normal. If the fault repeatedly occurs (If the busbar 1.
Page 119 LVRT required 4. If the fault is not caused by the automaticall- duration. In off-grid foregoing reasons and still exists, y cleared mode: Enable the please contact SUNGROW. 30s after AC under-voltage protective function only after shutdown. the output voltage is stable.
Page 120 3. If the fault is not caused by the LVRT required shutdown. foregoing reasons and still exists, duration. In off-grid please contact SUNGROW. mode: Enable the AC over-voltage function only after the output voltage is stable. The protection is the same as that of the mains connection.
Page 121 3. If the fault is not caused by the mode: The function only after foregoing reasons and still exists, fault will be the output voltage please contact SUNGROW. automaticall- is stable. The y cleared protection is as the 30s after...
Page 122 Wait for the MV power converter to an over-current in automaticall- return to normal. If the fault persists, Module the hardware (- y cleared for please contact SUNGROW to Protection including AC/DC 5 times at manually power down the machine over-current), or the most. After and clear the fault.
Page 123 Corrective measures condition condition 5. If the fault is not caused by the foregoing reasons and still exists, please contact SUNGROW. Generally, the machine will reconnect to the grid when the internal temperature returns to normal. If the fault repeatedly occurs: 1.
Page 124 2. If the fault is not caused by the the power supply is without other foregoing reasons and still exists, normal, and the fan faults. please contact SUNGROW. is abnormal in off mode for 10s. 3. The communication is abnormal, and the...
Page 125 If the fault current shutdown current is higher repeatedly occurs, please contact command is than the web set SUNGROW. issued. protection threshold. 1. The peak phase current of the power converter unit is 1.5 larger than the...
Page 126 4. Check whether the fan is running properly. Replace the fan if necessary. 5. If the fault is not caused by the foregoing reasons and still exists, please contact SUNGROW. In off mode, the absolute value of The trigger the MV power...
Page 127 3. If the fault is not caused by the foregoing reasons and still exists, please contact SUNGROW. Battery The sampled polarity voltage on the...
Page 128 If this fault during the startup occurs over Reboot the machine. If the fault AC Switch process, or the five times, it persists, please contact SUNGROW. Fault switch node fails to cannot be open during the cleared shutdown process. automaticall- 1.
Page 129 The fault is the positive and cleared once Reboot the machine. If the fault Neutral negative ends the voltage persists, please contact SUNGROW. Point Shift exceeds 260 V or returns to half-Bus voltage normal for exceeds 800V for 920 us.
Page 130 Corrective measures condition condition The oil level of the The oil level Low oil level transformer is of the Please contact SUNGROW. trip excessively low, transformer and tripping occurs. is normal. The temperature in temperature the oil tank of the...
Page 131: Routine Maintenance
14 Routine Maintenance 14.1 Overview For maintenance items beyond this manual, please confirm with SUNGROW or contact SUNGROW for maintenance, and unauthorized operation is strictly prohibited. 14.2 Safety Instructions Due to the effect of ambient temperature, humidity, dust and vibration, the MV power con- verter and the inner components will be aging and worn out.
Page 132: Five Safety Rules
If not, please contact SUNGROW. If the components needs to be replaced with products from other manufacturer or with different model number, a prior analysis and confirmation by SUNGROW is needed. Failure to follow this procedure may lead to physical injury or death and void all warranty from SUNGROW.
Page 133: Maintenance
User Manual 14 Routine Maintenance • Verify that the MV power converter interior is discharged completely with a multimeter. • Necessary ground and short circuit connections. • Cover the adjacent electrical components with insulation cloth during operation. 14.3 Maintenance 14.3.1 Introduction With TYPE 3R protection degree, the MV power converter can be installed outdoors.
Page 134 14 Routine Maintenance User Manual Almost all maintenance work requires no internal protective cover during mainte- nance. Make sure to reassembly the cover and fasten all the screws after the main- tenance work. Make sure all bolts are securely fixed. Once any unconformity is found during routine maintenance of the MV power con- verter and internal devices, please make corrections immediately.
Page 135 User Manual 14 Routine Maintenance Item Method Interval Warning • Check if the warning labels are clearly visible. Re- Every year labels place them if necessary. Check the cable connection after the MV power con- verter and internal devices are voltage free. Make cor- rections once any unconformity is found.
Page 136: Replacing Electrical Components
If not, please contact SUNGROW. If you needs to replace the components with products from other manufacturer and with different model number, a prior analysis and confirmation by SUNGROW is needed. Failure to follow this procedure may lead to physical injury or death and void all warranty from SUNGROW.
Page 137 User Manual 14 Routine Maintenance Maintenance and Operation Steps for Situation 1: Materials: • Cleaning cloth • Water • Alcohol or other non-corrosiveness detergent Figure Step 1. Clean the smudges on the surface using a rag (or other cleaning tool) with water 2.
Page 138 14 Routine Maintenance User Manual Figure Step 1. Polish the rough paint surface or the scratched parts by abrasive paper until the surface is smooth 2. Clean the target parts using a rag with water or 97% alcohol 3. When the surface is clean and dry, paint the scratched parts of the paint by banister brush and make sure the painting is as uni- form as possible...
Page 139 User Manual 14 Routine Maintenance Figure Step 1. Polish the damaged parts of the paint to re- move the surface rust or other roughness. 2. Clean the target parts using a rag with water or 97% alcohol to clean the dust and dirty.
Page 140 14 Routine Maintenance User Manual Check whether the protective paint sprayed on casing of the product is fallen off or peeled off; if so, repair it timely. Re-spray the protective paint every 5 years to the MV power converter surface.
Page 141: Appendix
15 Appendix 15.1 System Parameter table 15-1 SC2400UD-MV-US/SC2750UD-MV-US Parameter SC2400UD-MV-US SC2750UD-MV-US DC side Max. DC voltage 1500V Min. DC voltage 700 V 800 V DC voltage range 700 – 1500 V 800 – 1500 V Max. DC current 1760A No. of DC inputs 2 or 10 ②...
Page 142 15 Appendix User Manual Parameter SC2400UD-MV-US SC2750UD-MV-US Converter port nominal AC 480 V 550 V voltage Converter port AC voltage 422 – 528 V 484 – 605 V range AC voltage distortion < 3 % (Linear load) DC voltage component <...
Page 143 User Manual 15 Appendix Parameter SC2400UD-MV-US SC2750UD-MV-US Operating ambient temper- -35 to 60℃(> 45 ℃ derating)/'-31 to 140 ℉ (> 113 ℉ ature range derating) Allowable relative humidity 0 - 100 % range Cooling method Temperature controlled forced air cooling Max.
Page 144 15 Appendix User Manual SC3150UD-MV-US Parameter SC3450UD-MV-US Power factor at nominal 0.99 / 1 leading – 1 lagging power / Adjustable power factor Adjustable reactive power -100 % – 100 % range Feed-in phases / AC 3 / 3-PE connection AC side (Off-Grid) Converter port nominal AC 630 V...
Page 145 User Manual 15 Appendix SC3150UD-MV-US Parameter SC3450UD-MV-US Grid monitoring / Ground Yes / Yes fault monitoring Insulation monitoring Overheat protection General data Dimensions (W*H*D) 6058 * 2896 * 2438mm 238.5”* 114.0”* 96.0” Weight 16000kg（35274lbs.） Degree of protection TYPE 3R Operating ambient temper- -35 to 60℃(>...
Page 146 15 Appendix User Manual Parameter SC4000UD-MV-US SC5000UD-MV-US Converter port Max. AC out- 1443A*2 1443A*2 ④ put current Converter port nominal AC 800 V 900V voltage Converter port AC voltage 704–880 V 792-990 V range Nominal grid frequency / 60 Hz / 55 – 65 Hz Grid frequency range Harmonic (THD) <...
Page 147 User Manual 15 Appendix Parameter SC4000UD-MV-US SC5000UD-MV-US Dy1 or Dy11 Transformer vector Transformer cooling type KNAN Oil type Mineral oil(PCB free) or degradable oil on request Protection DC input protection DC Load switch + fuse Converter output protection AC Circuit breaker AC output protection MV Load switch + fuse Surge protection...
Page 148: Abbreviations
15 Appendix User Manual ①SC5000UD-MV-US and DCDC form a two-stage energy storage systemapplication, and the working DC bus voltage range is [1300~1360]V. SC5000UD-MV-US is capable of work- ing at 1500V. ②All models support single-branch and multi-branch designs (Max. 10 branchs). SC5000UD-MV-US mainly promotes multi-branch design and others mainly promotes sin- gle-branch design.
Page 149: Tightening Torques
The above cables are not included in the scope of supply and need to be prepared separately. 15.4 Quality Assurance When product faults occur during the warranty period, SUNGROW will provide free service or replace the product with a new one.
Page 150: Contact Information
• The customer shall give SUNGROW a reasonable period to repair the faulty device. Exclusion of Liability In the following circumstances, SUNGROW has the right to refuse to honor the quality guarantee: • The free warranty period for the whole machine/components has expired.
Page 151 Sungrow Power Supply Co., Ltd. www.sungrowpower.com...

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