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Sungrow SG6600UD-MV User Manual
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Sungrow SG6600UD-MV User Manual

Sungrow SG6600UD-MV User Manual

Mv grid-connected pv inverter
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User Manual
MV Grid-Connected PV Inverter
SG6600UD-MV/SG6600UD-MV-20/
SG8800UD-MV/SG8800UD-MV-20
SG6600UD-MV/SG6600UD-
MV Grid-
MV-20/SG8800UD-MV/SG8800UD-MV-20
Connected PV InverterUser
ManualSG6600_8800UD-MV–20-
UEN-Ver41–202502M0D00420
SG6600_8800UD-MV–20-UEN-Ver41–202502

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Summary of Contents for Sungrow SG6600UD-MV

  • Page 1 User Manual MV Grid-Connected PV Inverter SG6600UD-MV/SG6600UD-MV-20/ SG8800UD-MV/SG8800UD-MV-20 SG6600UD-MV/SG6600UD- MV Grid- MV-20/SG8800UD-MV/SG8800UD-MV-20 Connected PV InverterUser ManualSG6600_8800UD-MV–20- UEN-Ver41–202502M0D00420 SG6600_8800UD-MV–20-UEN-Ver41–202502...

  • Page 3: All Rights Reserved

    Software Licenses • It is prohibited to use data contained in firmware or software developed by SUNGROW, in part or in full, for commercial purposes by any means. • It is prohibited to perform reverse engineering, cracking, or any other operations that...

  • Page 5: Table Of Contents

    Contents All Rights Reserved .....................I 1 About This Manual ...................1 1.1 Validity......................1 1.2 Target Group ....................1 1.3 How to Use This Manual .................2 1.4 Symbol Explanations ..................2 2 Safety Instructions ....................3 2.1 Unpacking and Inspection ................4 2.2 Hoisting and Transportation................5 2.3 Electrical Connection ..................5 2.4 Operation.......................7 2.5 Operation and Maintenance ................7...
  • Page 6 5.1 Safety Precautions ..................26 5.2 Inspection Before Installation.................27 5.2.1 Scope of Delivery ................27 5.2.2 Product Inspection ................28 5.3 Installation Environment Requirements ............28 5.3.1 Installation Site ...................28 5.3.2 Foundation ..................29 5.3.3 Installation Spacing ................29 5.3.4 Installation Position Requirements............30 5.4 Hoisting and Fixing ..................30 5.4.1 Preparation Before Hoisting ..............30 5.4.2 Requirements for Hoist and Lifting Rope ..........30 5.4.3 During Hoisting ...................31...
  • Page 7 6.5.5 Securing Cables .................59 6.6 AC Side Connection ..................60 6.6.1 Inspection Before Wiring..............60 6.6.2 Procedure ..................61 6.6.3 Securing AC Cable................62 6.7 Communication Connection ................63 6.7.1 Overview ....................63 6.7.2 Procedure ..................63 6.8 Switch/Ethernet Communication ..............64 6.9 Check After Wiring..................65 6.9.1 Inspection...................65 6.9.2 Locking Cabinet Door ................66 7 Powering Up and Powering Down ...............67...
  • Page 8 8.4.1 Homepage..................79 8.4.2 Viewing Fault Information ..............80 8.4.3 Viewing Alarm Information ..............80 8.4.4 Boot/Shutdown ...................80 8.4.5 Setting Initial Parameters..............81 8.4.6 Setting Operation Parameters ..............81 8.4.7 Setting Protection Parameters..............81 8.5 Modifying Password..................81 8.6 Logout ......................82 9 O&M on iSolarCloud App ................83 9.1 About iSolarCloud ..................83 9.2 Function Overview..................83 9.3 Download and Installation ................84...
  • Page 9 11.4.1 Cleaning Air Inlet of Inverter Unit............116 11.4.2 Cleaning Air Outlet of Inverter............117 11.4.3 Cleaning Air Inlet of Power Distribution Cabinet ......... 118 11.4.4 Cleaning Air Outlet of Power Distribution Cabinet....... 119 11.4.5 Cleaning the Floor Drain ..............120 11.4.6 Appearance Repair................

  • Page 11: About This Manual

    This manual describes the transportation and storage, mechanical installation, electrical connection, power up and shutdown, web operation, troubleshooting, and maintenance of the MV Grid-Connected PV Inverter. Validity This manual applies to the following models: • SG6600UD-MV • SG8800UD-MV • SG6600UD-MV-20 •...

  • Page 12: How To Use This Manual

    If the manual received is slightly inconsistent with the product, it may be a result of a product version upgrade, and the actual product shall prevail. For any questions, please contact SUNGROW Customer Service. Symbol Explanations To ensure the safety of the users and their properties when they use the product and to make sure that the product is used optimally and efficiently, this manual provides users with the relevant safety information which is marked by the following symbols.

  • Page 13: Safety Instructions

    Level 6 or stronger winds. SUNGROW shall not be held liable for any damage to the device due to force majeure, such as...

  • Page 14: Unpacking And Inspection

    Perform operations considering ac- tual on-site conditions. • SUNGROW shall not be held liable for any damage caused by violation of gen- eral safety operation requirements, general safety standards, or any safety in- struction in this manual.

  • Page 15: Hoisting And Transportation

    User Manual 2 Safety Instructions Hoisting and Transportation Risk of personal injury or device damage due to incorrect operation! • Follow the procedure of work of heights when walking on the top of the MV Grid-Connected PV Inverter. • All hoisting and transportation must comply with the relevant codes and regula- tions of the nation/region where the project is located.
  • Page 16 2 Safety Instructions User Manual PV modules will generate lethal high voltage when exposed to sunlight. • Operators must wear proper personal protective equipment during electrical connections. • Before performing an electrical connection, be sure to disconnect the smart PV combiner box and use measuring equipment to ensure that cables are voltage- free.

  • Page 17: Operation

    User Manual 2 Safety Instructions Comply with the regulations related to the local grid during wiring. Operation When the product is working: • It is strictly forbidden to touch the live parts of the product. Otherwise, an elec- tric shock may occur. •...
  • Page 18 Do not open the cabinet door of any component of the inverter unit on sandy and windy days or when the relative humidity exceeds 95%. If some devices need to be replaced during operation and maintenance, please contact SUNGROW.

  • Page 19: Disposal

    To avoid the risk of electric shock, do not perform any other maintenance opera- tions beyond those described in this manual. If necessary, contact SUNGROW for maintenance. Otherwise, the losses caused are not covered by the warranty.
  • Page 20 2 Safety Instructions User Manual Please scrap MV Grid-connected PV Inverter in accordance with relevant local reg- ulations and standards to avoid property losses or casualties.

  • Page 21: Product Description

    Product Description Product Introduction The MV Grid-connected PV Inverter, designed and manufactured by SUNGROW, is mainly applied to large-and-medium PV power plants. The MV Grid-connected PV Inverter can meet the requirements of modular design and quick installation for medium and largescale PV power plants, and can ensure long-term, reliable, and safe feed-in operation.
  • Page 22 3 Product Description User Manual Version 1 Version 2 * The following instructions in this manual are provided based on the Version 1. And the fig- ures are for reference only, and the actual product received shall prevail. Name Description Ring Main Unit (RMU) Connecting the grid to the transformer.

  • Page 23: Main Internal Equipment

    User Manual 3 Product Description Name Description Convert the DC current generated by PV modules Inverter units into low-voltage AC current. Convert the low-voltage AC current output by the Transformer inverter units into medium-voltage AC current. Main Internal Equipment 3.3.1 Appearance of Inverter Unit Name Top air inlet Indicator panel...

  • Page 24: Internal Structure Of Inverter Unit

    3 Product Description User Manual Description Color Status Slow blinking (in- terval: 0.5s) The inverter unit is in a deep standby state. Glowing and fad- The DC and AC side are powered on, or the AC ing (interval: 2s) side is powered on, the inverter unit is in a standby or is starting (not connected to the grid).

  • Page 25: Main Parts Of Transformer

    User Manual 3 Product Description Description Name Disconnect it before maintenance and repair. Maintenance switch QS2 Control the on/off of the DC side circuits of the in- DC load switch QS1 verter unit. DC fuse DC wiring copper bar Off-grid commissioning Turn on this switch in the off-grid commissioning power supply switch mode.
  • Page 26 3 Product Description User Manual Description Graphics Name Drain valve and Drain the oil from the transformer into a container sampling valve through a clean hose. In 45℃ environments: to obtain the temperature of the winding. The alarm temperature is set to be 105 ℃...

  • Page 27: Main Parts Of Power Distribution Cabinet

    User Manual 3 Product Description Description Graphics Name In 45℃ environments: The alarm threshold is 95 ℃. An alarm signal is sent if the oil temperature reaches 95 ℃. The tripping threshold is 100 ℃. A tripping signal is sent if the oil temperature reaches 100 ℃. Oil temperature gauge In 51℃...
  • Page 28 3 Product Description User Manual figure 3-1 Main Parts of 5K Power Distribution Cabinet Description Wiring terminal block and micro circuit breaker Fuse of power distribution cabinet SPD QS4, main switch Switch port Ethernet port Fuse of power distribution cabinet figure 3-2 Main Parts of 15K Power Distribution Cabinet (Design 1) Description QS4, main switch...
  • Page 29 User Manual 3 Product Description Description Ethernet port Wiring terminal block and micro circuit breaker * is optional. figure 3-3 Main Parts of 15K Power Distribution Cabinet (Design 2) figure 3-4 Main Parts of 30K Power Distribution Cabinet Description Switch port or Ethernet port Fiber optic termination box Wiring terminal block...

  • Page 30: Main Parts Of Rmu

    3 Product Description User Manual Description QS4, main switch Micro circuit breaker * The figure is for reference only. The product received may differ. Please adopt Ethernet or switch communication according to the actual situation on site. 3.3.5 Main Parts of RMU Introductions to the Ring Main Units (RMUs) from ABB and ORMAZABAL are provided here as example.
  • Page 31 User Manual 3 Product Description figure 3-5 RMU (ABB) figure 3-6 RMU (ORMAZABAL) * The figures are for reference only. The actual product may differ. Name VCB (Vacuum Circuit Breaker) Disconnector Earthing switch Load switch (only available on Ormazabal)

  • Page 32: Symbol On Products

    Read this manual carefully before any operation on the product. Do not dispose of this product as household waste. SUNGROW shall not be held liable for any equipment damage or safety incident caused by failure to observe the warning signs.

  • Page 33: Transport And Storage

    Transport and Storage Precautions Failure to transport and store the product in accordance with the requirements in this manual may invalidate the warranty. Transportation Requirements In the whole process of loading, unloading, and transport, follow strictly the appli- cable safe operating procedure in the country/region where the project is located. Tool and Personnel Requirements •...

  • Page 34: Storage Requirements

    4 Transport and Storage User Manual Pre-transport route inspection should cover the following items: road condi- tions, height limits, actual heights, width limits, actual widths, weight limits, traf- fic restrictions, and potential obstructions. • In most cases, the total weight of a truck that carries the product will exceed the general weight limit on the road.

  • Page 35: Protection During Storage

    For a product shut down/stored for over six months, inspect its electrical components (IGBT module, DC fuses, fans, etc.), and take dehumidification and dedusting measures for the whole product. For detailed operation, please contact SUNGROW. • The UPS and their batteries must be charged once every six months after leaving the...

  • Page 36: Mechanical Mounting

    If there are prob- lems with the above inspection items, do not install the product and contact SUNGROW in time.

  • Page 37: Inspection Before Installation

    User Manual 5 Mechanical Mounting Improper hoisting may cause personal injury! • It is strictly prohibited to stand within 10m outside the operating area (i. e., under the boom and the hoisted machine) to avoid casualties. • Only professional personnel can operate the product, and be sure to wear per- sonal protective equipment when operating.

  • Page 38: Product Inspection

    • Visually check the product for any damage. If any problems are found or there is any question, please contact the forwarding company or SUNGROW. Only install the product when it is complete and intact. Before installation, ensure that: •...

  • Page 39: Foundation

    User Manual 5 Mechanical Mounting 5.3.2 Foundation Given that the installation site has been decided and the foundation has been set up before the arrival of the product, details on these two items will not be included in this manual. •...

  • Page 40: Installation Position Requirements

    5 Mechanical Mounting User Manual 5.3.4 Installation Position Requirements The installation position needs to meet the heat dissipation performance of the product, and the appropriate position should be selected according to the installation location of the product. Hoisting and Fixing 5.4.1 Preparation Before Hoisting •...

  • Page 41: During Hoisting

    User Manual 5 Mechanical Mounting The hoisting work must be carried out by strictly following the relevant hoisting in- structions, with specialized lifting devices used (such as lifting frames and slings). • The strength of the slings to be used should be determined properly based on the MV Grid-connected PV Inverter's weight.
  • Page 42 5 Mechanical Mounting User Manual figure 5-2 Hoisting by One Crane...

  • Page 43: Fastening Of Connectors

    • National and local safety rules should be observed at all times. • Regardless of relevant safety rules may void pertinent warranty claims from SUNGROW. 5.4.5 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.

  • Page 44: Installing Oil-Water Separator(Optional)

    5 Mechanical Mounting User Manual The steps to fixing the L mounting parts is shown in the following figure. Installing Oil-Water Separator(Optional) Generally, if there is no external oil tray, the base of the product is used as an oil tray, and the installation position of the oil-water separator is reserved at the bottom of the product, as shown in figure A below.

  • Page 45: Installing Sealing Plates

    There are two oil-water separator installation positions reserved at the bottom of the product, one is connected to the oil-water separator, and the other installation position needs to be blocked with a plug. If the installation of the oil-water separator is needed, please contact SUNGROW customer service. Installing Sealing Plates To ensure stability during transport, the sealing plates on the top of the transformer are not fully installed.

  • Page 46: Installing Sealing Plates (Version 1)

    5 Mechanical Mounting User Manual 5.6.1 Installing Sealing Plates (Version 1) Step 1 Remove the 4 L-shaped brackets and 6 U-shaped brackets that secure the sealing plates. Step 2 Secure the sealing plates on the top of the transformer. Flip up these sealing plates, and po- sition them upright.

  • Page 47: Installing Sealing Plates (Version 2)

    User Manual 5 Mechanical Mounting Step 4 Attach the four beams to the sealing plates with M8 bolts to keep the plates secure and stable. Check that all bolts are tightened after installation. - - End 5.6.2 Installing Sealing Plates (Version 2) Step 1 Remove the 4 L-shaped brackets and 6 U-shaped brackets that secure the sealing plates.
  • Page 48 5 Mechanical Mounting User Manual Step 3 Secure the sealing plate to the top of the transformer in the order shown below. - - End Check that all bolts are tightened after installation.

  • Page 49: Electrical Connection

    Electrical Connection Precautions • Before electrical connections, please make sure that MV Grid-connected PV In- verter is not damaged, otherwise, it may cause danger! • Before making electrical connections, check and confirm that the cables are all intact and well-insulated. Poor insulation or cable damage may result in safety hazards.
  • Page 50 6 Electrical Connection User Manual Sand and moisture penetration may damage the electrical equipment in the prod- uct, or affect their operating performance! • Avoid electrical connections during sandstorms or when the relative humidity in the surrounding environment is greater than 95%. •...

  • Page 51: Wiring Overview

    User Manual 6 Electrical Connection • Whenever necessary, wear proper protective equipment such as goggles, insu- lating gloves, and insulating shoes, and take all necessary auxiliary protective measures to ensure the safety of the personnel and the equipment. • Before operating the product, check and ensure that the tools to be used have undergone regular maintenance.

  • Page 52: Preparation Before Wiring

    6 Electrical Connection User Manual 1- Inverter unit 2– Transformer 3– Power Distribution Cabinet table 6-1 Interface Description Description Recommended Cable Specifications DC input port 400 mm at most AC output port 70 mm — 400 mm 2 x 0.75 mm —2 x 1.5 mm shielded twisted pair Communication port...
  • Page 53 User Manual 6 Electrical Connection Heat gun Torque screwdriver Wire stripper Hydraulic clamp Torque wrench Multimeter Electric drill Screwdriver Protective gloves Goggles Insulated shoes Protective clothing Hard hat...

  • Page 54: Open The Product Door

    6 Electrical Connection User Manual 6.3.2 Open the Product Door Step 1 Remove the support beams around the product. The positions of the support beams that need to be removed differ between the two versions. Version 1 Version 2 Step 2 Open the cabinet door.

  • Page 55: Cables

    User Manual 6 Electrical Connection Step 3 Fix the doors of the inverter unit cabinet and power distribution cabinet. Step 4 Remove the protective cover of the wiring area. - - End 6.3.3 Cables The cables must meet the following requirements: •...

  • Page 56: Position Of Cable Inlet

    6 Electrical Connection User Manual 6.3.4 Position of Cable Inlet For easy wiring, cables between external devices and the product are routed into the prod- uct through the bottom cable inlet. * The figure is for reference only. The product received may differ. Description External power supply and communication cable inlet AC output cable inlet...
  • Page 57 User Manual 6 Electrical Connection Step 3 Lead cables into the cabinet through the holes, then secure the cables. Cables can be se- cured in different ways, usually with fireproof mud and waterproof connectors. Generally, you can choose one of them to secure the cables on site. The figure below shows how to secure the cables with fireproof mud.

  • Page 58: Ground Connection

    * For the number of inputs and the cable size not mentioned above, please confirm with SUNGROW. * Waterproof connectors (contact SUNGROW in advance if needed) or fireproof mud (pre- pared by users) are used to seal off the cable inlets/outlets.

  • Page 59: Overview

    AC cables, DC cables, and communication cables. • Both grounding terminals on the side of the product must be connected to the protective grounding points reliably. SUNGROW shall not be held liable for any damage caused by the violation. •...

  • Page 60: Grounding Cable

    6 Electrical Connection User Manual 6.4.3 Grounding Cable Use 50 mm ~ 95mm grounding cables to reliably connect the two grounding terminals to the grounding points of the system. 1: Heat shrink tubing 2: OT/DT terminal...

  • Page 61: Dc Input Connection

    User Manual 6 Electrical Connection DC Input Connection The PV arrays will generate lethal high voltage when exposed to sunlight. Respect all safety instructions listed in relevant documents about PV arrays. • Make sure the PV array is well insulated to the ground before connecting it to the MV Grid-Connected PV Inverter.
  • Page 62 6 Electrical Connection User Manual Negative Grounding figure 6-4 7 DC Inputs figure 6-5 7 DC Inputs with MPLC...
  • Page 63 User Manual 6 Electrical Connection Floating Grounding figure 6-6 7 DC Inputs figure 6-7 7 DC Inputs with MPLC Illustrations in the manual are for the product with configuration of 7 DC inputs only. • For the product with 6 DC inputs, in its DC wiring area, the first fuse and cop- per bar on the right in the illustration are removed.

  • Page 64: Removing Insulation Board Before Connection

    6 Electrical Connection User Manual figure 6-8 7 DC Inputs with ESS For the product with 7 DC inputs with ESS, in its DC wiring area, the first fuse and copper bar on the left in the illustration are removed. * The wiring area is subject to the actual product.

  • Page 65: Ot/Dt Terminal Requirement

    The number of PV strings connected to the DC side of each inverter unit should be consistent. If this is not possible, please contact SUNGROW. Step 1 Lead the cable into the wiring area through the inlet hole, and mark the cable polarity.
  • Page 66 6 Electrical Connection User Manual Step 2 Strip the protective layer of the cable to expose the copper core of the wire with strippers. Step 3 Install the OT/DT terminal to the wire and crimp them with a crimping tool. Install a heat shrink tubing to the terminal and heat it with a heat gun.
  • Page 67 6-11 Double Side Copper Wire Connection * The length of bolts used for double-sided wiring should be determined based on the actual conditions at the project site. To implement double-sided wiring, please contact SUNGROW and provide relevant details to assess the feasibility first. •...
  • Page 68 Prevent the aluminum component of the copper-aluminum bimetallic terminal from contacting the copper bar to avoid electrochemical corrosion, abnormal heating due to increased contact resistance, and potential equipment damage. To implement double-sided wiring, please contact SUNGROW and provide relevant details to assess the feasibility first.

  • Page 69: Securing Cables

    User Manual 6 Electrical Connection When performing DC wiring, make sure the cables remain vertical to the ground without in- clination, to prevent the copper bar from getting deformed due to stress in other directions. Step 5 Pull the cable back slightly after wiring to ensure that the cable is long enough. •...

  • Page 70: Ac Side Connection

    6 Electrical Connection User Manual figure 6-14 Cable Clip Installation Note: The cable clip is an optional accessory. Follow-up Operation The figure below shows the DC side of the inverter unit after the wiring is completed. * The figure is for illustration only and the actual product on site may be different. Description Cable Waterproof connector *...

  • Page 71: Procedure

    User Manual 6 Electrical Connection • Check and ensure that the sleeves and copper bars in the wiring area in the HV compart- ment are free from damage, deformation, and fracture. 6.6.2 Procedure Step 1 Lead the cable from external device through the cable entry on the bottom of the cable compartment.

  • Page 72: Securing Ac Cable

    6 Electrical Connection User Manual Should there be any unused wiring terminals, block them with insulating caps. When connecting the AC cable, do not use the hole on the pressure relief plate as a substitute for the AC cable inlet. 6.6.3 Securing AC Cable After completing the AC cables inside the RMU according to the relevant requirements, se- cure the AC cables to prevent them from slipping due to stress.

  • Page 73: Communication Connection

    User Manual 6 Electrical Connection figure 6-18 Securing a three-core cable * The RMU in the figures are for reference only and may differ from the real product. Communication Connection 6.7.1 Overview There is an RS485 communication terminal block inside the power distribution cabinet. table 6-2 Port Mark and Definition (Example) Marks Plug-compatible Devices...

  • Page 74: Switch/Ethernet Communication

    6 Electrical Connection User Manual Step 4 Loosen the screwdriver, the metal plate returns and compresses the cable. * The figure is for reference only. The product received may differ. - - End Switch/Ethernet Communication Overview The switch or Ethernet port is set inside the power distribution cabinet, marked respectively as A and B in the figure below.

  • Page 75: Check After Wiring

    User Manual 6 Electrical Connection figure 6-19 Ethernet Communication Port In 5K Power Distribution Cabinet figure 6-20 Ethernet Communication Port In 30K Power Distribution Cabinet as an example Connect external monitoring devices to the Ethernet port by a CAT-5e cable. Check After Wiring 6.9.1 Inspection Check the wiring thoroughly and carefully when all electrical connections have been...

  • Page 76: Locking Cabinet Door

    6 Electrical Connection User Manual 6.9.2 Locking Cabinet Door Step 1 Release the fixing doors of the inverter unit cabinet and the power distribution cabinet. Unfix in reverse of the fixing method, refer to "6.3.2 Open the Product Door". It is forbidden to close the door forcibly when the door is fixed. Step 2 Lock the cabinet door and pull out the key.

  • Page 77: Powering Up And Powering Down

    Powering Up and Powering Down Safety Instructions When the product is working: • It is strictly forbidden to touch the live parts of the product. Otherwise, an elec- tric shock may occur. • It is strictly prohibited to disassemble any parts of the product. Otherwise, an electric shock may occur.

  • Page 78: Powering Up Operations

    7 Powering Up and Powering Down User Manual Powering Up Operations 7.2.1 Removing Film on MV Grid-connected PV Inverter The highlighted parts of the MV Grid-connected PV Inverter in the figures below are covered with films. Be sure to remove the films before the MV Grid-connected PV Inverter is officially put into operation.

  • Page 79: Installing Fuse In Ac Spd

    User Manual 7 Powering Up and Powering Down figure 7-2 Remove Film at Air Inlet/Outlet of Power Distribution Cabinet (Version 1) figure 7-3 Remove Film at Air Inlet/Outlet of Power Distribution Cabinet(Version 2) * The figure is for reference only. And the actual product received shall prevail. 7.2.2 Installing Fuse in AC SPD Confirm the position of the Fuse in AC SPD.

  • Page 80: Adjusting De-Energized Tap Changer

    7 Powering Up and Powering Down User Manual Install fuse Step 1 Open the fuse holder in the AC side. Step 2 Insert fuses. Step 3 Close the fuse holder in the AC side SPD. - - End 7.2.3 Adjusting De-energized Tap Changer Adjust the output voltage of the transformer.

  • Page 81: Opening Pressure Relief Valve

    User Manual 7 Powering Up and Powering Down 7.2.4 Opening Pressure Relief Valve Open the cap on the pressure relief valve (marked as A below). 7.2.5 Removing Foam Part from Oil Thermometer Remove the protective cover on the oil thermometer and remove the foam parts in the pro- tective cover before the MV Grid-Connected PV Inverter is officially put into operation.

  • Page 82: Inspection Before Powering Up

    7 Powering Up and Powering Down User Manual Device Source Cleaning cloth Wrench Adjustable wrench Hose connector Pipe clamp Step 1 Ensure that the drain valve is closed. Step 2 Remove the cover plate of the drain valve. Step 3 Remove the cover plate of the drain valve. Step 4 Open the drain valve and the oil in the transformer slowly flows from the transformer into the tank.

  • Page 83: Pv Array

    User Manual 7 Powering Up and Powering Down • Check and ensure that the emergency stop button is released . • Check various upstream and downstream electrical switches and buttons, as well as those on the inverter unit, to make sure that they can be operated flexibly and meet the requirements.

  • Page 84: Powering Up Steps

    7 Powering Up and Powering Down User Manual • Check the external air-insulated gap distance, and whether the air-insulated distance be- tween the bushings of different voltage levels and the ground meets the relevant standards. Powering Up Steps Step 1 Turn on the QS2 maintenance switches of all inverter units, the QS3 maintenance switch at the bottom of the inverter unit, and the QS4 switch inside the power distribution cabinet.

  • Page 85: Unplanned (Emergency) Powering Down

    User Manual 7 Powering Up and Powering Down Step 3 Open the AC cabinet door, and verify that the QF1 AC circuit breakers of all inverter units are all in the open state. Step 4 Turn off the QS2 maintenance switches of all inverter units, the QS3 maintenance switch at the bottom of the inverter unit, and the QS4 switch inside the power distribution cabinet.
  • Page 86 7 Powering Up and Powering Down User Manual Step 7 Turn off the load switch/ Circuit breaker of the upstream smart PV combiner boxes. For the position of the above switches, please see "3.3.2 Internal Structure of In- verter Unit" "3.3.4 Main Parts of Power Distribution Cabinet".

  • Page 87: M On Web

    O&M on WEB It is recommended to perform O&M on the WEB interface after the device is powered on. Communications Diagram The communication wiring inside the MV Grid-connected PV Inverter is completed before delivery. Connect the laptop to the switch inside the power distribution cabinet using a CAT- 5e cable on site to enable Web access on the laptop.

  • Page 88: Preparation Before Login

    Step 1 Enable WiFi on the mobile device (such as a mobile phone), search for the hotspot, such as SG-xxx (xxx represents the device SN), and enter the password. The password is ESPWifi@123. Step 2 Open a browser on the mobile phone and enter the address (11.11.11.1) or domain (sungrow. net) to access the WEB interface.

  • Page 89: Login Steps

    User Manual 8 O&M on WEB - - End Login Steps Step 1 Enter the server address to enter the homepage as a visitor by default. Laptop: • NET1 port, URL: 12.12.12.12. • NET2 port, URL: 14.14.14.14. Mobile device: URL:11.11.11.1. Step 2 Click and select the desired language in the upper right corner of the interface.

  • Page 90: Viewing Fault Information

    8 O&M on WEB User Manual Description Alarm number Language switching options User center 8.4.2 Viewing Fault Information Step 1 Click “Overview” → “General Information” on the left navigation bar to enter the homepage. Step 2 Click in the upper-right corner of the interface to view information such as the name and time of the fault event.

  • Page 91: Setting Initial Parameters

    User Manual 8 O&M on WEB 8.4.5 Setting Initial Parameters Step 1 Click “Device Monitoring” in the left navigation bar. Step 2 Pull down “Country /Region” to set according to the product location, and pull down “Machine Choose” to set according to the actual product model. Click “Settings” to complete the initial parameter setting.

  • Page 92: Logout

    8 O&M on WEB User Manual Logout To protect the account security, it is recommended to log out in time after the operation is completed. Exit Method Click and select Logout in the upper right corner of any interface.

  • Page 93: M On Isolarcloud App

    O&M on iSolarCloud App After the device is powered on, except on the Web interface, you can also perform simple O&M of devices on the iSolarCloud App. O&M via the iSolarCloud App is supported, except in Europe. About iSolarCloud With iSolarCloud App, communication between the MV Grid-connected PV Inverter and the mobile device can be established via WLAN, thus allowing for mobile maintenance of MV Grid-connected PV Inverters.

  • Page 94: Download And Installation

    9 O&M on iSolarCloud App User Manual figure 9-1 Functional Tree of the iSolarCloud App Download and Installation Option 1 Search for "iSolarCloud" in the following app stores, and download and install the App. • MyApp/Yingyongbao (Android, mainland China users) •...

  • Page 95: Login

    User Manual 9 O&M on iSolarCloud App Login 9.4.1 Requirements Before logging in to the App, please make sure: • The AC and DC side of the inverter units are powered on. • WLAN is enabled on your mobile device (e.g., mobile phone). •...
  • Page 96 9 O&M on iSolarCloud App User Manual Step 2 Open the iSolarCloud App. On the login screen, tap Local Access at bottom left. figure 9-2 Local Access Step 3 A confirmation dialog will pop up on the screen, which is shown below. Tap Confirm to con- nect to the device.
  • Page 97 User Manual 9 O&M on iSolarCloud App figure 9-3 Login Confirmation Step 4 Tap More, and enter the account name and password to log in. The default account name is “user” and password is pw8888. Then, tap Verification. figure 9-4 Identity Verification To keep your account secure, please change the password as soon as possible.

  • Page 98: Home

    9 O&M on iSolarCloud App User Manual Step 5 Once logged in, you will go to the Home screen of the App. - - End Home Once logged in, you will go to the Home screen, as shown below.
  • Page 99 User Manual 9 O&M on iSolarCloud App figure 9-5 Home Screen table 9-1 Description of Modules on the Home Screen Description Item Displays information such as generated output and feed-in power of the MV Grid-connected PV Inverter are shown here. Arrows between the icons indicate that there is energy flowing Power Flow between the devices.

  • Page 100: Device List

    9 O&M on iSolarCloud App User Manual Description Item Shows the daily yield curve by default. You can also switch to check the monthly, yearly, or total yield curve. The curves shown Data Curve here are based on power. Navigation Includes "Home", "Device list", "Records", and "More".
  • Page 101 User Manual 9 O&M on iSolarCloud App figure 9-7 Records Status Records Tap Status Records to check the fault alarm history, which is shown as follows. Select the fault you need to view and click to jump to the detailed information for that fault. figure 9-8 Status Records History Cruve Tap History Cruve to view the historical operating curves of the device at different dates.

  • Page 102: More

    9 O&M on iSolarCloud App User Manual figure 9-9 History Cruve More Tap More in the bottom navigation bar. Functions such as “Boot”, “Shutdown”, and “Modify Password” are available on this screen.

  • Page 103: Boot/Shutdown

    User Manual 9 O&M on iSolarCloud App figure 9-10 More 9.8.1 Boot/Shutdown You can choose Boot/Shutdown, and select a device to start/stop it. The user interface is shown as follows.

  • Page 104: Modify Password

    9 O&M on iSolarCloud App User Manual 9.8.2 Modify Password You can choose“More→Modify Password” to change your password. The user interface is shown as follows.

  • Page 105: Troubleshooting

    • Whether the MV Grid-connected PV Inverter limits the output of active power. If the problem still persists or there are any other questions, please contact SUNGROW. It would be helpful if the following information is provided during a call: •...
  • Page 106 In this case, do not attempt to power it off and try to restore MV Grid-con- nected PV Inverter, instead, contact SUNGROW personnel for the support. Disconnect the AC and DC side switches of MV Grid-connected PV...
  • Page 107 User Manual 10 Troubleshooting Fault Name Fault Cause Fault Level Corrective Method 1. Use a thermometer to check whether the current ambient temper- ature is within the temperature range advertised by MV Grid-connected PV Inverter. 2. Check whether the air inlet of MV Reactor The temperature of Grid-connected PV Inverter and in-...
  • Page 108 10 Troubleshooting User Manual Fault Name Fault Cause Fault Level Corrective Method 1. Check whether the DC side volt- age of MV Grid-connected PV Inver- ter is short-circuited, whether the Voltage exists be- input voltage exceeds the allowable tween the positive range, and whether the grid voltage and negative poles is abnormal.
  • Page 109 User Manual 10 Troubleshooting Fault Name Fault Cause Fault Level Corrective Method 1 Check whether the protection pa- rameters in Parameter Settings -> Protection Parameters meet the grid standards of the location where MV Grid-connected PV Inverter is installed. The grid voltage is Grid over- higher than the set Important...
  • Page 110 10 Troubleshooting User Manual Fault Name Fault Cause Fault Level Corrective Method 1 Check whether the internal and ex- ternal power supply control switches of MV Grid-connected PV Inverter are closed or disconnected at the same time. If they are closed at the same time, please disconnect one of the Control The control power...
  • Page 111 User Manual 10 Troubleshooting Fault Name Fault Cause Fault Level Corrective Method 1. Refer to the troubleshooting meth- od of "DC SPD fault" to conduct pre- liminary troubleshooting. 2. Check whether the micro circuit The AC side SPD breaker is connected in series with of MV Grid-con- Important AC SPD fault...
  • Page 112 10 Troubleshooting User Manual Fault Name Fault Cause Fault Level Corrective Method The output of MV Overload Grid-connected PV Refer to the troubleshooting method Important protection Inverter exceeds of "AC over-current”. the load limit. The leakage cur- 1. Check whether the AC cable is rent sampling val- damaged.
  • Page 113 User Manual 10 Troubleshooting Fault Name Fault Cause Fault Level Corrective Method 1 Check the DC cables. Check whether the positive ground- ing cable of each DC branch is damaged. Check whether the DC cable resist- ance to the ground is normal. Grounding A grounding fault Important...
  • Page 114 The fuse on the Check whether the DC fuse is blown. DC fuse DC side of MV Secondary If so, please contact SUNGROW to anomaly Grid-connected PV replace the fuse. Inverter fails. 1. Check the insulation of AC cables.
  • Page 115 Corrective Method The fuse on the Check whether the DC fuse is blown. DC side of MV Secondary DC fuse fault If so, please contact SUNGROW to Grid-connected PV replace the fuse. Inverter fails. The branch fuse of Branch fuse...
  • Page 116 Fault Name Fault Cause Fault Level Corrective Method The AC switch is Please contact Important AC switch off disconnected. SUNGROW. The carrier signal transmis- Please contact Carrier sync flt Important sion is abnormal. SUNGROW. The drive board inside MV Please contact...

  • Page 117: Other Faults

    If the fault is not caused by the fore- going reasons and still persists, please contact SUNGROW as soon as possible. 1. Refresh the Web page manually. 2. Restart or replace the mobile de-...
  • Page 118 Method”. If the fault is not caused by the fore- going reasons and still persists, please contact SUNGROW as soon as possible. 1. Export data in batches multiple The amount of data ex- Fail to export measur- times.

  • Page 119: Routine Maintenance

    11 Routine Maintenance 11.1 Safety Instructions Risk of the MV Grid-Connected PV Inverter damage or personal injury due to incor- rect service! • Disconnect the switches between the product and all power supplies before maintenance. • After the MV Grid-Connected PV Inverter is powered off for 20 minutes, measure the voltage and current with measuring equipment.
  • Page 120 To avoid the risk of electric shock, do not perform any other maintenance opera- tions beyond those described in this manual. If necessary, contact SUNGROW for maintenance. Otherwise, the losses caused are not covered by the warranty. To prevent misuse or accidents caused by unrelated personnel, post prominent warning signs or demarcate safety warning areas around the device to prevent ac- cidents caused by misuse.

  • Page 121: Inspection After Power Off

    User Manual 11 Routine Maintenance 11.2 Inspection After Power Off While the product is operating, do not turn off any AC- or DC-side switches directly. Otherwise, an electrical arc may occur, which may then damage the switch or even the MV Grid-connected PV Inverter. During the installation and operation of the product, ensure the positive or nega- tive of the PV string is not short-circuited to ground.

  • Page 122: Maintenance Period

    11 Routine Maintenance User Manual 11.3 Maintenance Period 11.3.1 Maintenance (Every Three Years) Item Check method • Oil thermometer: Alarm temperature and tripping temperature. • Pressure relief valve: Check whether the pressure re- lief valve is in good contact. Monitoring and protective equipment of the transformer •...

  • Page 123: Maintenance (Every Two Years)

    User Manual 11 Routine Maintenance 11.3.2 Maintenance (Every Two Years) Item Check method Check the following items, and correct immedi- ately those failing to meet the relevant requirements: • Check whether there is any damage or deforma- tion of the MV Grid-Connected PV Inverter and in- ternal equipment.

  • Page 124: Maintenance (Every Year)

    11 Routine Maintenance User Manual 11.3.3 Maintenance (Every Year) Item Check method Check the following items, and correct immediately those fail- ing to meet relevant requirements: • Check whether there are flammable objects on the top of the MV Grid-Connected PV Inverter. •...

  • Page 125: Maintenance (Every Six Months To One Year)

    User Manual 11 Routine Maintenance Item Check method • Check the running status of fans. • Check whether the fan blade rotates smoothly. • Check whether there is abnormal noise during the operation of the fans. Screw Check whether internal screws fell off. Check the following items, and correct immediately those fail- ing to meet relevant requirements: •...

  • Page 126: Common Maintenance Items

    11 Routine Maintenance User Manual Item Check method Check the temperature of the heat sink and the amount of dust accumulated. Clean heat-dissipation IGBT modules with a Air inlet and outlet vacuum cleaner if necessary. • Carry out regular inspection for corrosion of all metal components.

  • Page 127: Cleaning Air Outlet Of Inverter

    User Manual 11 Routine Maintenance Procedure Step 1 Use a screwdriver to remove the M5 fixing screws for the first maintenance. Step 2 Pull the spring plunger at both ends of the filter at the air inlet outward and tilt the filter down- ward to remove it.

  • Page 128: Cleaning Air Inlet Of Power Distribution Cabinet

    11 Routine Maintenance User Manual Step 1 Clean the air outlet between the inverter unit and transformer. Step 2 Clean the air outlets at the bottom of the AC side of the inverter units. - - End 11.4.3 Cleaning Air Inlet of Power Distribution Cabinet The cleaning methods for power distribution cabinets vary due to differences in their external versions.

  • Page 129: Cleaning Air Outlet Of Power Distribution Cabinet

    User Manual 11 Routine Maintenance Version 2 Unscrew the two M5 bolts on the mesh cover for the front air inlet, then take the mesh cover down. Pull outward the two spring plungers on the mesh cover for the front air inlet, and open the cotton filter press plate.

  • Page 130: Cleaning The Floor Drain

    11 Routine Maintenance User Manual Step 3 Reinstall the filter in reverse steps. * The figure is for reference only. And the actual product received shall prevail. - - End 11.4.5 Cleaning the Floor Drain Step 1 Remove the two fixing bolts on the floor drain. Step 2 Take out the floor drain.

  • Page 131: Detergent Cleaning

    User Manual 11 Routine Maintenance Conditions Solutions Surface dirt that can be wiped off "11.4.6.1 Detergent Cleaning" Finish paint falls off, and the primer is intact "11.4.6.2 Finish Paint Repair" Primer is damaged, and the base material is "11.4.6.3 Double-Layer Paint Repair" exposed 11.4.6.1 Detergent Cleaning For dust or stains on the product surface, you can wipe them off using water and alcohol.
  • Page 132 Interthane 990 35℃ 4h • Confirm with SUNGROW before using paints of other brands or models. • When using a two-component paint, first thoroughly agitate each component individually, and then mix them in the specified proportions for stirring.
  • Page 133 User Manual 11 Routine Maintenance Step 3 Use a piece of clean cloth dipped in alcohol or detergent to remove the surface powder. Step 4 Repair the finish paint. Prepare the finish paint with the same color as the appearance. Common finish paint colors RAL7035 (Streamer RAL7016 (Dolphin...

  • Page 134: Double-Layer Paint Repair

    • Use primers and finish paints from the same manufacturer. • Confirm with SUNGROW before using any paint from a different manufacturer. • When using a two-component paint, first thoroughly agitate each component individually, and then mix them in the specified proportions for stirring.
  • Page 135 User Manual 11 Routine Maintenance table 11-5 Cleaning Tools Item 400 mesh/600 mesh abrasive paper Cleaning cloth Alcohol Brushes with different sizes Grinder (conical and cylindrical polishing heads) Wall putty Finish coat Primer Film thickness meter Environment Requirements • Ambient temperature: 5℃–40℃ •...
  • Page 136 11 Routine Maintenance User Manual Step 4 Use a piece of clean cloth dipped in alcohol to remove the surface powder. Step 5 Repair the primer. Prepare the primer with the same color as the appearance. Common finish paint colors RAL7035 (Streamer RAL7016 (Dolphin RAL9003 (White)

  • Page 137: Checking Door Locks And Hinges

    User Manual 11 Routine Maintenance When using spray paint, follow these steps: Carefully cover the area outside the damaged spot (extending 800mm out- ward) using masking paper. Spray the exposed area with the paint. After the paint dries, check that the dry film thickness is within the range of 100μm–300μm.

  • Page 138: Replacing Fans

    11 Routine Maintenance User Manual Step 7 Secure the new fuse with M10×30 * bolts with a tightening torque of 34 - 40 N.m. - - End * When the DC input of the inverter unit is equipped with MPLC, the bolts specifications used are M8×30 and M10×30.

  • Page 139: Appendix

    12 Appendix 12.1 Technical Parameters SG6600UD-MV/SG6600UD-MV-20 SG6600UD-MV SG6600UD-MV-20 Model Input (DC) Max. PV input 1500 V voltage Min. PV input volt- age / Start-up input 895 V / 905 V 938 V / 950 V voltage MPP voltage range 895V –1500 V 938 V –1500 V...
  • Page 140 12 Appendix User Manual SG6600UD-MV SG6600UD-MV-20 Model Power Factor at Nominal Power / Ad- > 0.99 / 0.8 leading - 0.8 lagging justable Power Factor Feed-in phases / AC 3 / 3 connection Efficiency Inverter max. effi- 99.0 % / 98.8 % 99.0 % / 98.7 %...
  • Page 141 User Manual 12 Appendix SG6600UD-MV SG6600UD-MV-20 Model 27.5 T ≤ 28 T Weight * Degree of Protection Inverter: IP65 / Others: IP54 Auxiliary Power 15 kVA (optional: max. 30 kVA) Supply Operating Ambient -35 to 60 ℃ (>45 ℃ derating) -35 to 60 ℃...
  • Page 142 12 Appendix User Manual SG8800UD-MV SG8800UD-MV-20 Model No. of independent MPP inputs 40 (optional: 56) No. of DC inputs Max. PV input 8 * 1435 A current Max. DC short-cir- 8 * 3528 A cuit current PV Array Negative grounding or floating Configuration Output (AC) 8800 kVA @ 45 ℃,9064 kVA @...
  • Page 143 User Manual 12 Appendix SG8800UD-MV SG8800UD-MV-20 Model Transformer cooling ONAN type Mineral oil (PCB free) Oil type Protection & Function DC Input Protection DC load switch + fuse Inverter Output AC circuit breaker Protection AC MV Output MV load switch + fuse Protection Overvoltage DC Type II / AC Type II...

  • Page 144: Tightening Torques

    **Secure the cable at a proper point to reduce the stress on the cable lug. 12.3 Quality Assurance When product faults occur during the warranty period, SUNGROW will provide free service or replace the product with a new one. Evidence During the warranty period, the customer shall provide the product purchase invoice and date.

  • Page 145: 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 146 Sungrow Power Supply Co., Ltd. www.sungrowpower.com...

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