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CHNT Power SCA25K-TM-EU Installation And Operation Manual

3-phase grid-tied pv inverter
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Installation and Operation Manual
For 3-Phase Grid-tied PV Inverter
Applicable to SCA15/20/25K-T-SA,
SCA25K-TM-EU and SCA(30,33,36,37.5,40)K-T-EU
Shanghai Chint Power System Co., Ltd.
Version 1.3
August, 2023

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  • Page 1 Installation and Operation Manual For 3-Phase Grid-tied PV Inverter Applicable to SCA15/20/25K-T-SA, SCA25K-TM-EU and SCA(30,33,36,37.5,40)K-T-EU Shanghai Chint Power System Co., Ltd. Version 1.3 August, 2023...

  • Page 2: Table Of Contents

    Table of contents Table of contents 0   Preface ....................4   1   IMPORTANT SAFETY INSTRUCTIONS ..........5     Warnings and Symbols in this Document ........5     Markings on the Product ..............6     Safety Precautions of Operating the PV Inverter ......7   2  ...
  • Page 3 Table of contents 6.2.2 Read/Write Register ............... 37     6.2.3 Firmware Upgrade ................47       Event Menu ................... 48     More Menu ..................49   7   Maintenance and Replace .............. 50     Check Electrical Connections ............50    ...

  • Page 4: Preface

    Preface 0 Preface Thank you for choosing a Chint Grid-tied PV Inverter (hereinafter referred to as “PV Inverter” or “Inverter”) developed by Shanghai Chint Power System Co., Ltd. (hereinafter referred to as "CHINT"). This PV Inverter is a high performance and highly reliable product specially designed for the Brazil market.

  • Page 5: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS 1 IMPORTANT SAFETY INSTRUCTIONS （SAVE THESE INSTRUCTIONS） PLEASE READ THIS USER MANUAL CAREFULLY BEFORE INSTALLATION AND OPERATION OF THIS PV INVERTER. CPS RESERVES THE RIGHT TO REFUSE WARRANTY CLAIMS FOR EQUIPMENT DAMAGE IF USERS FAIL TO INSTALL THE EQUIPMENT ACCORDING TO THE INSTRUCTIONS IN THIS MANUAL.

  • Page 6: Markings On The Product

    IMPORTANT SAFETY INSTRUCTIONS Markings on the Product Symbols Meanings HIGH VOLTAGE! This equipment works with high voltages. All works on the equipment must only be performed as described in this document. HIGH ENERGY! Risk of electric shock from energy stored in capacitor. Do not remove cover until 10 minutes after disconnecting all sources of supply.

  • Page 7: Safety Precautions Of Operating The Pv Inverter

    IMPORTANT SAFETY INSTRUCTIONS Safety Precautions of Operating the PV Inverter WARNING! All operations and connections please professional engineering and technical personnel! To prevent the risk of electric shock during equipment maintenance or installation, please ensure that all DC and AC power has been separated from the equipment, and ensure that the equipment is reliably grounded.

  • Page 8: General Introduction

    General Introduction 2 General Introduction Photovoltaic Grid-tied System SCA15/20/25K-T-SA, SCA25K-TM-EU and SCA(30,33,36,37.5,40)K-T-EU series inverters are designed for using with residential PV grid-tied systems. The PV system is generally made up of PV modules, PV inverter and AC power distribution equipment, as shown in Figure 2-1. The solar energy is converted by PV modules to DC power, and then converted by the inverter to AC power with the same frequency and phase as the AC grid.
  • Page 9 For cooling Table 2-2 Product Components IMPORTANT! SCA25K-TM-EU & SCA(30,33)K-T-EU series inverters are equipped with 3 MPPT (6 inputs, the MPPT4 is plugged temporarily as reserve interface), SCA15/20/25K-T-SA and SCA36/37.5/40K-T-EU series inverters are equipped with 4 MPPT (8 inputs). Their mounting...

  • Page 10: Led Indicator

    General Introduction LED Indicator display SCA15/20/25K-T-SA, SCA25K-TM-EU & SCA(30,33,36,37.5,40)K-T-EU inverter is as shown below. Figure 2-4 LED display of the inverter Indicators and their indications are shown below: LED Icon Name Status Indication Normal PV power supply (voltage is big...

  • Page 11: Product Protection Functions

    General Introduction Product Protection Functions Short circuit protection   Input to ground insulation resistance monitoring  Output voltage and frequency monitoring Ground leakage current monitoring   DC component monitoring of output current  Anti-island protection Input and output overvoltage protection ...
  • Page 12 DC Switch MPPT Trackers MPPT1+ PV1+ Three-level Inverter PV2+ LC Filter Grid Relay MPPT3+ PV5+ PV6+ AC EMI BUS-N Filter DC EMI PV1- Filter PV2- BUS-N PV5- PV6- Figure 2-5b Schematic Diagram of SCA25K-TM-EU & SCA(30,33)K-T-EU Inverter 12 / 62...

  • Page 13: Mechanical Installation

    Accessories Remark Inverter Mounting bracket Install inverter PV DC cable quick connector: 6 (male) + 6 (female) for SCA25K-TM-EU & DC connector SCA(30,33)K-T-EU inverter; 8 (male) + 8 (female) for SCA15/20/25K-T-SA, SCA36/37.5/40K-T-EU inverter. AC connector cover Connect AC cables and protect AC terminals...

  • Page 14: Installation Precautions

    Mechanical Installation IMPORTANT! The items on the delivery list above are for the standard configuration. The accessories provided may vary if optional parts are purchased. Before unpacking, check whether the packaging box and all safety signs, warning labels, and nameplates on the packaging box and the product are intact.

  • Page 15: Installation Requirements

    Mechanical Installation  The installation height of the inverter should be easy to observe the LED indicator panel, as well as facilitate electrical connection, operation, and maintenance.  Make sure the installation condition doesn’t exceed the temperature limits specified for the inverter, to prevent undesirable power loss. ...
  • Page 16 Mechanical Installation Vertical Tilted backward Leaning forward Horizontally Upside down Figure 3-3 Installation modes NOTICE! Make sure that the mounting structure (bearing wall, rack, etc.) is capable to bear the weight of the inverter. 16 / 62...

  • Page 17: Space Requirements

    Mechanical Installation 3.3.3 Space Requirements The distance between the inverter and surrounding objects should meet the following conditions： Figure 3-4 Installation space requirements for inverter racks NOTICE If the surroundings are relatively closed, please increase this distance appropriately. Installation Procedures Mark positions of mounting holes on wall according to the size of the mounting brackets.
  • Page 18 Mechanical Installation Drill six holes with a depth of 65mm with a Ф12mm drill at the marked position. Knock all the six expansion bolts into mounting holes, remove nuts (E), spring washers (D) and flat washers (C), leaving their tubes (B) and bolts (A) in the wall.
  • Page 19 Mechanical Installation Hang the inverter host on the mounting bracket according to Figure 3-8. Figure 3-8 Hang the inverter host CAUTION! Ensure the mounting bracket is properly installed before hanging the inverter on the bracket. Use two M6X16 screws to fasten inverter on mounting bracket. Tools required: No.10 hexagon socket wrench, torque: 5N.m.

  • Page 20: Electrical Connection

    Electrical Connection 4 Electrical Connection CAUTION! The cables shall be connected in accordance with the National Electrical Code and all other applicable local codes or jurisdictions. Cable Specification All the cables shall be connected in accordance with the following specifications. Outer dia.

  • Page 21: Electrical Connection

    Electrical Connection Electrical Connection NOTICE! Pay attention to watertight during construction. Please read carefully and refer to Chapter 9 Technical Data before wiring. 4.3.1 AC Wiring and Grounding Perform wiring procedures as follows: Insert the four partitions into baffle gaps between different phases. Figure 4-1 AC Output terminals and buckles Remove an appropriate length of the jacket and insulation layer from the cable.
  • Page 22 Electrical Connection Loosen the locking cap from the connector, route the power cable through the locking cap of the connector and reserve appropriate wiring length. Insert the exposed core wires into the crimp area of the OT terminal, wrap the wire crimp area with heat shrink tubing or insulation tape, and crimp them using hydraulic pliers.
  • Page 23 AC circuit breaker as per the following specifications. Inverter Current value of AC circuit breaker 60A/70A/80A SCA15/20/25K-T-SA SCA25K-TM-EU 60A/70A/80A/87A/87A SCA(30,33,36,37.5,40)K-T-EU Table 4-3 Specifications of AC circuit breaker Use one M6 screw to connect and tighten the secondary protection ground wire.

  • Page 24: Dc Wiring

    Electrical Connection NOTICE! The connection of secondary protection ground wire cannot be replaced by that of PE terminal among the AC connection. Both shall be grounded correctly. CHINT will not bear any responsibility for the possible consequences caused by the omission. 4.3.2 DC Wiring To deliver on the optimum performance of the PV inverter, please read the following guidelines before performing any DC connections.
  • Page 25 Electrical Connection Perform cable connection as per the following steps: Remove an appropriate length of the jacket and insulation layer from the DC input cable of PV strings. Figure 4-8 DC Wire stripping Insert the exposed areas of the positive and negative power cables into metal terminals of the positive and negative connectors respectively.

  • Page 26: Communication Connection

    Electrical Connection Insert the positive and negative connectors into their corresponding terminals of the inverter until a "click" sound is heard. Figure 4-11 Insert the connectors into corresponding terminals NOTICE! The grounding wire must be connected well. The DC switch should be in the OFF state. Communication Connection 4.4.1 Connect RS485 cable Strip off RS485 wire by referring to AC cable stripping.

  • Page 27: Install Wifi Dongle

    Electrical Connection Insert RS485 connector into RS485 interface. Figure 4-13 Insert RS485 connector 4.4.2 Install Wifi Dongle Install the Wifi Dongle as shown below. Remove two fixing screws on the communication cover with a No.2 Philips screwdriver to expose the communication interface. Install Wifi Dongle onto the communication interface and fasten the Wifi Dongle firmly with No.2 philps screwdriver, torque value: 1.0 N.m.

  • Page 28: Inverter Commissioning

    Inverter Commissioning 5 Inverter Commissioning WARNING! Please follow the guidelines below before performing any on-grid operation to eliminate possible dangers. Pre-commissioning Checks and Preparation 5.1.1 Mechanical Installation Perform the following inspections by referring to chapter 3 Mechanical Installation.  Make sure all the mounting brackets are secure. ...
  • Page 29 Inverter Commissioning IMPORTANT! Complete the test and inspection before operation, to confirm that there is no error. The following contents are applicable to SCA15/20/25K-T-SA, SCA25K- TM-EU & SCA(30,33,36,37.5,40)K-T-EU series inverters, we just take SCA40K-T-EU as instance. Once powered, the inverter will automatically create a wireless network that can be visible as an Access Point from the user communication devices (tablet, smartphone, etc.).
  • Page 30 Inverter Commissioning Touch the wireless network named CUGW-XXXXXXX (the last four numbers can be found on the label of Wifi Dongle), or touch the green QR icon under the list to scan the bar code of Wifi Dongle to connect network; Or you can try WiFi Mode by touching the icon in the top right corner and inputting password “Password”.
  • Page 31 Inverter Commissioning RS485: Choose the communication data Modbus Address and Baud Rate. Inverter Clock: Set the system clock. Change Password: You can change the password according to the system prompt if necessary or as required. IMPORTANT! Please check with your local electricity supply company before selecting a Grid Code.
  • Page 32 Inverter Commissioning When the device screen shows the normal operation status and the RUN light on the LED panel is illuminated, it indicates that the grid connection and power generation are successful. You can now browse through the real-time data in the APP. If the inverter fails to operate normally, the FAULT light will illuminate and the fault information will be shown on the interface.

  • Page 33: Main Menus

    Main menus 6 Main menus IMPORTANT! The following contents are applicable to SCA15/20/25K-T-SA, SCA25K- TM-EU & SCA(30,33,36,37.5,40)K-T-EU series inverters, we just take SCA40K-T-EU as instance. Structure tree of App interface is as below: Choose APP function Setup the product Activate a site Manage my site Wifi Setting Password: Password Main menu Chart Setting History...
  • Page 34 Main menus Figure 6-2 Main information on Main Interface 34 / 62...

  • Page 35: Chart Menu

    Main menus Chart Menu In the chart sub-menu, you can view the power generation situation at different times, such as Current, Today and Total. These data can also be displayed in Day, Month, Year, shown as below in Figure 6-6. Figure 6-3 power generation situation Setting Menu Touch the Setting icon and input the password “1111”, you will go to the setting...

  • Page 36: Inverter Parameters

    Main menus Figure 6-4 Setting interface 6.2.1 Inverter Parameters Touch the Inverter Parameters tab, you can find the set and readjust the following parameters, including Grid Code, PV Link Type, Neutral line, RS485 etc., referring to section 5.2.1. IMPORTANT! Please check with your local electric supply company before selecting a grid code.

  • Page 37: Read/Write Register

    Main menus 6.2.2 Read/Write Register In the Read/Write Register interface, you can find the following sub-menus:  Protection Grid Parameters Other Parameters  Parameter Dispatch   Active Power Derating Parameters  Reactive Power Derating Parameters  LVRT/HVRT  Enable/disable Control Parameters ...
  • Page 38 Main menus Figure 6-6 Protection Parameters 38 / 62...
  • Page 39 Main menus 6.2.2.2 Other Parameters On the Other Parameters interface, you can find following common parameters shown as below. Figure 6-7 Other Parameters interface 39 / 62...
  • Page 40 Main menus 6.2.2.3 Power Dispatch On the Power Dispatch interface, you can find following common parameters shown as below. Figure 6-8 Power Dispatch interface 6.2.2.4 Active Power Derating Parameters The ActivePower Derating Parameters menu is used to set the active power derating parameters, including Active Power Derating, Over Voltage Derating, Over Frequency Derating, etc.
  • Page 41 Main menus Figure 6-10 Curve of over frequency derating Figure 6-11 ActivePower Derating Parameters interface 41 / 62...
  • Page 42 Main menus 6.2.2.5 Reactive Power Derating Parameters The ReactivePowerDerating interface is used to set the Grid reactive power derating parameters, including PF parameters and Qu parameters, etc. Figure 6-12 The ReactivePowerDerating interface Note: The PF and Q value can be adjusted by remote software if the “Remote” is selected.
  • Page 43 Main menus  Q(u) Curve：Q(u) curve mode. Note: The reactive compensation changes according to the grid voltage change, as shown in Figure 6-14. Figure 6-14 Q(u) Curve Mode 6.2.2.6 LVRT/HVRT The LVRT/HVRT interface is used to set the LVRT (Low voltage ride through) and HVRT (High voltage ride through) parameters as shown in the following interfaces: Figure 6-15 LVRT/HVRT interface 43 / 62...
  • Page 44 Main menus 6.2.2.7 Enable/disable Control Parameters In the Enable/disable Control interface, you can find following common Enable/disable parameters shown as below. Figure 6-16 Enable/disable Control interface 44 / 62...
  • Page 45 Main menus 6.2.2.8 Control Command In the Control Command interface, you can access the following submenus: Figure 6-17 Commands interface  Powe OnOff: This function can be used to control remotely the turn on/off status of the device.  Force Restart: If a fault shutdown happens, a severe fault may have occurred inside the inverter.
  • Page 46 Main menus 6.2.2.9 Inverter Basic Information On the interface, you can see the basic information about the inverter, such as type, DSP version number, series number, grid code, N line setting, PV connection mode, etc. Figure 6-18 Inverter basic information interface If you need some after-sale service, you can also find useful information on this interface conveniently, thus getting a full range of after-sales support and service as soon as possible.

  • Page 47: Firmware Upgrade

    Main menus 6.2.2.10 LcdLess Basic Parameters On the LcdLess Basic Parameters interface, you can find some basic information related to LCD module, such as LCD version number, Modbus address, Baud rate, etc. Figure 6-19 LcdLess Basic Parameters interface All these three registers are configured as standard, and all these parameters are read-only, that means you cannot change them randomly.

  • Page 48: Event Menu

    Main menus Event Menu Touch the Event icon, it will go to the Event interface. There are 2 submenus in the Event menu: “Current” and “History”, you can touch the submenu icon to switch between current and history events, as shown below. Figure 6-20 Event interface 48 / 62...

  • Page 49: More Menu

    Main menus More Menu If turn on/off operation is necessary, touch More icon and input password "1111" to power on/off device. Figure 6-21 More interface  Manual Turn ON/OFF: Manual Power ON/OFF is required after Grid Code setting or manual (fault) shut-down. Touch to submenu “Turn ON/OFF”. Then move the cursor to “Turn ON”...

  • Page 50: Maintenance And Replace

    Maintenance 7 Maintenance and Replace WARNING! Before starting any product maintenance, the inverter should be stopped running, the AC circuit breaker connected to the grid and the PV input on the DC side shall be all disconnected, and then wait at least 10 minutes before starting any operation.

  • Page 51: Troubleshooting

    Troubleshooting 8 Troubleshooting LED Indicator Troubleshooting If the LED light indicates any faults, please perform troubleshooting according to the Table 8-1. LED status Solutions Warnings Turn off the external AC breaker. Switch the DC switch to OFF position. Check the PV input voltage and polarity. Common (restorable) faults Turn off the external AC breaker.
  • Page 52 Troubleshooting Fault Codes Solutions CommErr Definition: Communication inside inverter fails Possible causes: Terminal block connecters of internal communication wires have poor contact Recommended solutions: Observe for 5 minutes and see whether the alarm will be eliminated automatically; Switch off 3-phase working power supply and then reboot the system;...
  • Page 53 Troubleshooting Fault Codes Solutions Protect0090 Turn off DC switches and external AC breaker. (Bus over voltage) Wait for 1 minute between OFF and ON for all energy to discharge. If inverter cannot clear fault, replace inverter. Protect0070 Turn off DC switches and external AC breaker. Wait for 1 minute between OFF and ON for all energy to (Bus under voltage) discharge.
  • Page 54 Troubleshooting Reverse Turn DC Switch OFF electrode Use meter to find out which PV string is connected in reverse (x=6/8) polarity. Correct PV string connection if necessary. Contact after-sales service personnel. High Input Check if its input voltage is within 1100V; voltage Turn off DC switches and external AC breaker.

  • Page 55: Technical Data

    Technical Data 9 Technical Data SCA15 SCA20 SCA25 25K- 30K-T- 33K-T- 36K-T- 37.5K-T- 40K-T- Model (SCA xx) K-T-SA K-T-SA K-T-SA TM-EU DC Input Max DC input voltage 1100Vdc MPPT voltage range 200 - 1000Vdc Start Voltage/Power 250Vdc / 80W Rated DC Voltage 350Vdc 600Vdc Number of MPPTs...
  • Page 56 Technical Data Grid Connection Type 3Φ (N) / PE Maximum AC current 43.3A 57.8A 65.6A 41.7A 62.5A 66.7A Grid Frequency 50/60Hz Grid Frequency Range 45-55 / 55-65Hz Power factor @ rated >0.99 (±0.8, adjustable) power Current THD <3% AC disconnect type System parameters Topology Transformer-less...
  • Page 57 Technical Data Communication RS485/WiFi (standard) & 4G(Optional) Structural parameters Dimensions 684*488*270mm (WxHxD) (mm) Weight (kg) 37kg 28kg 30kg 30kg 35kg 35kg 35kg Safety Safety Standard IEC/EN 62109-1/2 EMC Standard IEC/EN 61000-6-1/2/3/4, IEC/EN 62920, PORTARIA Nº 140 Table 9-1 Datasheet 57 / 62...

  • Page 58: Quality Assurance

    Quality Assurance 10 Quality Assurance Liability Exemption Damage during transportation; Operate in an environment beyond the provisions of this manual; Incorrect or inappropriate use of the product (including installation and use); Unauthorized modification of the product or provided software; Ignore the safety warnings and relevant statutory safety regulations contained in the product and documentation;...

  • Page 59: Recycling

    Recycling 11 Recycling Distributors or installers should contact the inverter manufacturer after removing the inverter from the photovoltaic module and follow the instructions. The inverter cannot be disposed of as household waste. When the inverter's service life expires, please dispose of it in accordance with the electrical waste disposal laws applicable to the installation location.

  • Page 60: Appendix

    Figure 2-4 LED display of the inverter ............. 10   Figure 2-5a Schematic Diagram of SCA15/20/25K-T-SA and SCA36/37.5/40K- T-EU Inverter ..................... 11   Figure 2-5b Schematic Diagram of SCA25K-TM-EU & SCA(30,33)K-T-EU Inverter ..................... 12   Figure 3-1 Delivery list ..................13  ...

  • Page 61: Appendix B: Table List

    Appendix Figure 6-8 Power Dispatch interface ............... 40   Figure 6-9 Curve of over voltage derating ............40   Figure 6-10 Curve of over frequency derating ..........41   Figure 6-11 ActivePower Derating Parameters interface ......... 41   Figure 6-12 The ReactivePowerDerating interface ......... 42  ...
  • Page 62 Contact Information Shanghai Chint Power System Co., Ltd. Headquarters: Building 4, No. 3255, Sixian Road, Songjiang District, Shanghai, China Switchboard: +86-021-37791222 Fax: +86-021-37791222-866001 Website: www.chintpower.com Service Hotline: +86-021-37791222-866300 Email: service.cps@chint.com 62 / 62...

This manual is also suitable for:

Sca30k-t-euSca33k-t-euSca36k-t-euSca37.5k-t-euSca40k-t-eu

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