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CHNT Power SCA5K-T-EU User Manual

Three phase grid-tied pv inverter
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Three Phase Grid-tied PV Inverter
User Manual
Applicable to
SCA (5 / 6 / 8 / 10 / 15 / 20 / 25) K-T-EU
Shanghai Chint Power System Co., Ltd.
Version 1.0
April 2025
Doc. No. 9.0020.0873A0

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  • Page 1 Three Phase Grid-tied PV Inverter User Manual Applicable to SCA (5 / 6 / 8 / 10 / 15 / 20 / 25) K-T-EU Shanghai Chint Power System Co., Ltd. Version 1.0 April 2025 Doc. No. 9.0020.0873A0...

  • Page 2: Table Of Contents

    Table of content Table of Content Preface ........................... 4 IMPORTANT SAFETY INSTRUCTIONS ................ 5 1.1. Warnings and Symbols in this Document ..............5 1.2. Markings on the Product ................... 6 1.3. Safety Precautions of Operating the PV Inverter ............7 General Introduction .......................
  • Page 3 Table of content 6.1. App Download ......................33 6.2. App Connection and Quick Configuration ............... 33 6.2.1. Anti-Backflow Parameter Configuration in MatriCloud ........41 Maintenance and Replace .................... 43 7.1. Check Electrical Connections ................. 43 7.2. Clean Wind Inlets and Outlets ................43 7.3.

  • 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"). IMPORTANT! Please read this manual carefully and make sure that you have understood all the contents thoroughly before you start any operation.

  • Page 5: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS 1. IMPORTANT SAFETY INSTRUCTIONS （SAVE THESE INSTRUCTIONS） PLEASE READ THIS USER MANUAL CAREFULLY BEFORE THE INSTALLATION AND OPERATION OF THIS PV INVERTER. CHINT 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 1.2. 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 5 minutes after disconnecting all sources of supply.

  • Page 7: Safety Precautions Of Operating The Pv Inverter

    IMPORTANT SAFETY INSTRUCTIONS 1.3. Safety Precautions of Operating the PV Inverter DANGER! Before opening the inverter housing for maintenance, you must first disconnect the grid-side AC power supply and PV-side DC power supply, and ensure that the high- voltage energy inside the equipment has been completely released! Generally, you must cut off all connections to the inverter for at least 10 minutes before you can maintain and operate the equipment.

  • Page 8: General Introduction

    General Introduction 2. General Introduction 2.1. Photovoltaic Grid-tied System SCA(5 / 6 / 8 / 10 / 15 / 20 / 25)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 below.

  • Page 9: Product Dimensions And Appearance

    General Introduction 2.2. Product Dimensions and Appearance Figure 2-2 Inverter Dimensions(unit: mm) Figure 2-3 Inverter Dimensions(unit: mm) Name Function Vent valve Release pressure DC Switch Cut off DC power supply safely DC input interface Connect to PV modules For cooling Wi-Fi dongle interface For local control and remote monitoring Communication interface...

  • Page 10: Led Indicator

    General Introduction Table 2-2 Product Components 2.3. LED Indicator The LED display on the SCA(5 / 6 / 8 / 10 / 15 / 20 / 25)K-T-EU inverter is as shown below. Figure 2-4 LED display of the inverter Indicators and their indications are shown below: Indication Status Warning...

  • Page 11: Product Protection Functions

    2.6. ARC Detection Protection Arc detection protection functions of the inverter conform to IEC 63027 standard, arc protection device type is and the detailed explanation are as tables below. Inverter Type ARC protection device type SCA5K-T-EU SCA6K-T-EU SCA8K-T-EU F-I-AFPE-1-1-2 SCA10K-T-EU...
  • Page 12 General Introduction Letter Meaning Full covered Integrated AFPE Provide detection and interruption function Each input string port connects to one PV array x (x=1, 2) Each detection channel has one or two input ports Two detection channels Table 2-5 Arc protection device letter meanings ARC Protection: This function detects if arcing is occurring on the DC side of the inverter.

  • Page 13: Schematic Diagram And Circuit Design

    General Introduction 2.7. Schematic Diagram and Circuit Design The electrical schematic diagram of inverter is as shown in figures below. PV input goes through the lightning protection circuit and DC EMI filter circuit and then through the previous BOOST circuit to achieve maximum power tracking and boost functions. The inverter uses three-level technology to convert the DC voltage into a three-phase AC voltage, filters out high frequency components through an output filter, and then outputs high-quality AC power through a two-stage relay and an EMI filter.

  • Page 14: Mechanical Installation

    Mechanical Installation 3. Mechanical Installation 3.1. Inverter Storage If the inverter is not immediately installed upon arrival, the following requirements should be met when storing the inverter: Do not remove the outer packaging of the inverter.  Store it in a clean, dry place, and prevent the intrusion of dust and moisture. ...

  • Page 15: Installation Precautions

    Mechanical Installation Accessories Remark Inverter Mounting Bracket Hang inverter PV DC cable quick connector: DC Input Connector 5-15kW: 2 (+) & 2(-) 20-25kW: 4 (+) & 4(-) AC Output Connector Connect AC cables and protect AC terminals Wi-Fi Dongle For communication and monitoring M5x12 Screw For fastening inverter and mounting bracket.
  • Page 16 Mechanical Installation The bottom power and communication interfaces of the inverter should not bear any weight,  and should not be directly in contact with the ground. Static electricity may damage the electronic components of the inverter, so anti-static  measures should be taken during the replacement or installation process.

  • Page 17: Installation Requirements

    Mechanical Installation 3.4. Installation Requirements 3.4.1. Installation Environment It is recommended to install inverter under a shelter to avoid direct sunlight, rain and snow accumulation, to prevent from triggering power derating, increasing inverter failures or reducing its service life. Figure 3-2 Environment requirements 3.4.2.

  • Page 18: Space Requirements

    Mechanical Installation 3.4.3. Space Requirements The distance between the inverter and surrounding objects should meet the following conditions： Figure 3-4 Installation space requirements for inverter NOTICE! The distance from inverter to its left and right hand objects shall be ＞200 mm, to objects above, below and on the front shall be ＞300 mm.
  • Page 19 Mechanical Installation Figure 3-5 Drill hole and knock nylon expansion bolts 2. Insert three screws (ST6.3x55) through reserved holes of the mounting bracket and then lock them into the expansion bolts with a torque value of 115.2 kgf.cm. Figure 3-6 Fasten the mounting bracket CAUTION！...

  • Page 20: Installation Check

    Mechanical Installation CAUTION! The weight of SCA(5/6/8/10/15)K-T-EU inverter is about 17 kg (≈37.5 pounds). The weight of SCA(20/25)K-T-EU inverter is about 21 Kg (≈46.3 pounds). Ensure the mounting bracket is properly installed before hanging the inverter on the bracket. 4. Use one M5 combination screw to fasten inverter on mounting bracket. Tools required: PH2 screw driver, torque: 25.5 kgf.cm.

  • Page 21: Electrical Connection

    Electrical Connection 4. Electrical Connection DANGER! The cables shall be connected in accordance with the National Electrical Code and  all other applicable local codes or jurisdictions. All cable connections must be made while ensuring that the equipment is free from ...

  • Page 22: Electrical Cable Connection

    Electrical Connection 4.3. Electrical Cable Connection NOTICE! Pay attention to watertight during construction.  Cables of the same type should be bundled together, and different types of cables  should be arranged separately, with no intertwining or crossing allowed. Please read carefully and refer to Chapter 9 Technical Data before wiring. ...
  • Page 23 Electrical Connection 4. Use the standard hex wrench to tighten each crimping screw and secure the cables with a torque of 8.2 kgf.cm ~ 12.2 kgf.cm. Figure 4-4 Secure the AC cable 5. Tighten the locking nut (1) by hand with a torque of 30.6 ~ 40.8 kgf.cm. Then connect the sleeve (2) and connector (3) until you hear a “click”...
  • Page 24 Electrical Connection 7. Use one M5 screw to connect and tighten the secondary protection ground wire. Figure 4-7 Tighten the secondary ground wire NOTICE! To enhance the corrosion resistance of the terminal, it is recommended to apply  silicone or paint externally to the grounding terminal after the installation of the protective ground connection.

  • Page 25: Dc Wiring

    Electrical Connection 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. Confirm DC input configuration and make sure the maximum DC open voltage of each PV ...
  • Page 26 Electrical Connection Perform cable connection as per the following steps: 1. Remove an appropriate length of the jacket and insulation layer from the DC input cable of PV strings. Figure 4-9 DC Wire Stripping 2. Insert the exposed areas of the positive and negative power cables into metal terminals of the positive and negative connectors respectively.
  • Page 27 Electrical Connection 4. Insert the positive and negative connectors into their corresponding terminals of the inverter until a "click" sound is heard. Figure 4-12 Insert the connectors into corresponding terminals NOTICE! The grounding wire must be connected well.  The DC switch should be in the OFF state. ...

  • Page 28: Communication Connection

    Electrical Connection 4.3.3. Communication Connection 4.3.3.1. Connect RS485 Cable Perform RS485 cable connection as per the following steps: 1. Loosen the gland nut of the RS485 connector by hand. Figure 4-14 Loosen the gland nut 2. Route a four-core RS485 communication cable through the gland nut and adapter of the RS485 connector, and then strip off cable insulation layer.
  • Page 29 Electrical Connection 4. Tighten the crimping screws with a screwdriver, torque value: 4.1~6.1 kgf.cm. Figure 4-17 Tighten the screws 5. Tighten the wiring plug by hand with a torque of 12.2~15.3 kgf.cm. Then adjust the cable length, tighten the gland nut by hand with a torque of 26.5 kgf.cm~29.6 kgf.cm. Figure 4-18 Tighten the RS485 connector 6.

  • Page 30: Anti-Backflow For Single Inverter

    Electrical Connection Figure 4-20 Install the Wi-Fi Dongle 4.3.4. Anti-Backflow for Single Inverter Note: Anti-Backflow is a standard function of SCA(5 / 6 / 8 / 10 / 15 / 20 / 25)K-T-EU Inverter, which can be enabled or disabled based on user requirements. Follow the diagram below to perform the single anti-backflow wiring: Before performing any electrical connections, ensure the meter is intact and all cables are de-energized.
  • Page 31 Electrical Connection Load RS485-B RS485-A Figure 4-21 Three phase four wire: via current transformer 31 / 56...

  • Page 32: Inverter Commissioning

    Inverter Commissioning 5. Inverter Commissioning WARNING! Please follow the guidelines below before performing any on-grid operation to  eliminate possible dangers. When the equipment is powered on for the first time, it is imperative that  professionals correctly configure the parameters. Before operating in grid-connected mode, adhere to the following guidelines to ...

  • Page 33: App Interface And Setting

    Maintenance and Replace 6. App Interface and Setting IMPORTANT! Complete the test and inspection before operation, to confirm that there is no • error. • The mobile device should remain within a visible distance of 5 m from the inverter; otherwise, the communication signal quality between the App and the inverter cannot be guaranteed.
  • Page 34 Maintenance and Replace Figure 6-1 Server and Language Configuration Click Device Access and then Bluetooth Connect button to open the device name list. Choose the correct device name and then you will be directed to the Home interface. The device name "XXXXXXXX" is the last 8 digits of SN on the communication module label. Note: NFC function is now unavailable.
  • Page 35 Maintenance and Replace Figure 6-3 Home Interface Click Settings on the main inteface to access the register configuration interface. (If passoword needed, enter “1111”). Figure 6-4 Click Settings The register parameters include Input Register Map (Only Read) and Hold Register Map (Read and Write).
  • Page 36 Maintenance and Replace ○ Grid Status Information Data Area ○ Inverter Output Status Information Data Area ○ Inverter PV Input Status Information Data Area ○ Inverter Internal Status Information Ddta Area ○ Inverter Fault Status Information Data Area Hold Register Map (READ and WRITE) ...
  • Page 37 Maintenance and Replace Figure 6-5 Register Parameters Click Settings -> Inverter Basic Inforamtion to set the Standard Value, Netural Line Setting, PV Input Mode, Rated Voltage inforamtion. Alternatively, you can configure Netural Line Setting and Rated Voltage in the “More” interface (refer to Step 7-8). Figure 6-6 Configure Inverter basic informtaion You can enable/disable or configure the following parameters in the Control Commands 37 / 56...
  • Page 38 Maintenance and Replace group: Power on/off the device, force restart, recover to fatory defaults, AutoTest(CEI), MPPT scan, ARC detection, ARC clean, PFSetValueRemote, PSetPercentRemote, QSetPercent Remtoe. Figure 6-7 Configure control commands Click More, then click Basic Settings.(If password needed, enter 1111). Figure 6-8 Click More >...
  • Page 39 Maintenance and Replace Configure the basic parameters, such as rated voltage information, neutral line setting, RS485 external communication address and baud rate configuration, time setting, password setting, and, etc. Figure 6-9 Main interface IMPORTANT! Please check with your local electricity supply company before selecting a Grid Code.
  • Page 40 Maintenance and Replace Figure 6-10 View fault information 10. Additionally, in the Home interface, you can click the Power on off command in the top-right corner to power on or power off the inverter. Figure 6-11 Power on or power off 40 / 56...

  • Page 41: Anti-Backflow Parameter Configuration In Matricloud

    Maintenance and Replace 6.2.1. Anti-Backflow Parameter Configuration in MatriCloud After completing the anti-backflow wiring as per section 4.3.4 Anti-Backflow for Single Inverter, the following configurations need to be set through the MatriCloud App. 1. There are two access points to enable the anti-backflow function, you can access from either one: Go to Home, click AntiRefluxEn button, select Single Anti-refluxEn.
  • Page 42 Maintenance and Replace 2. Select meter type: navigate to “Setting > LcdLess Basic Parameter2”, set “MeterType” parameter to “DTSU666”. Figure 6-14 Configure meter type 3. Disable the anti-backflow function: There are two access points to disable the anti-backflow function: Go to Home, click AntiRefluxEn button, select Disable. ...

  • Page 43: Maintenance And Replace

    Maintenance and Replace 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 44: Replace The Inverter

    Maintenance and Replace 2. Disconnect the watertight cable connector from cooling fan. Figure 7-2 Disconnect watertight cable connector 3. Use a No.2 Phillips head screwdriver to remove two fastening screws. Figure 7-3 Replace cooling fans 4. Fasten new cooling fans on the fan tray. Tools required: No.2 Phillips head screwdriver, torque value: 14.2 kgf.cm ~ 18.4 kgf.cm.

  • Page 45: Troubleshooting

    Troubleshooting 8. Troubleshooting 8.1. 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) Turn off the external AC breaker.
  • Page 46 Troubleshooting Observe for 10 minutes and see whether the alarm will be eliminated automatically; Switch off DC power supply and then reboot the system; Contact after-sales service personnel. ExtFanErr Recommended solutions: Observe for 10 minutes and see whether the alarm will be eliminated automatically;...
  • Page 47 Troubleshooting (Over- Check whether the location of installation is appropriate or not; temperature Observe for 30 minutes and see whether the alarm will be eliminated protection) automatically; Contact after-sales service personnel. Protect0170 Raise limit of DCImax (for example, 400mA) to allow inverter more room to (DCI high) adjust in transient condition to cope with imbalance of impedance and voltage between Grid phases...

  • Page 48: Technical Data

    Technical Data 9. Technical Data SCA5K- SCA6K- SCA8K- SCA10K- SCA15K- SCA20K- SCA25K- Model T-EU T-EU T-EU T-EU T-EU T-EU T-EU DC Input 1100Vdc Max. DC input Voltage 2000 - 1000Vdc MPPT Operating Voltage Range 250 Vdc Start Voltge/Power 600Vdc Rated DC Voltage Number of MPPTs Number of input strings per MPPT 15 A...
  • Page 49 Technical Data 17 kg 21 kg Weight MC4 (Max. 6 mm DC Connection Type OT / DT Terminal (Max. 35 mm AC Connection Type Safety IEC/EN 61000, IEC/EN 62109, IEC 61727, IEC 62116, IEC 63027, IEC 61683, IEC/EN 62920, EN 55011, C10/11, CEI 0-21, EN50549-1/2, NC RfG, PTPiREE, Certifications NTS V2.1, RD 647, RD 413, RD 1699, UNE 217002, UTE C15-712-1, DIN VDE 0126-1-1, VDE-AR-N 4105, DIN VDE V 0124, TOR Erzeuger Typ A/B...
  • Page 50 Technical Data 110% 100% 440V 825V 850V 925V 800 900 1000 PV Voltage (V) Figure 9-3 DC Input Voltage De-rating Curve of SCA10/20K-T-EU 110% 100% 570V 825V 850V 925V 800 900 1000 PV Voltage (V) Figure 9-4 DC Input Voltage De-rating Curve of SCA15K-T-EU 110% 100% 825V...
  • Page 51 Technical Data So/Sn 110% 100% 0.80 x Un 0.90 x Un 1.1 x Un Figure 9-6 AC Output Voltage De-rating Curve 3. Temperature De-rating: When the installation temperature rises, the inverter output power needs to be de-rated. De- rating needs to be performed according to the figure below: 110% 100% 0℃...
  • Page 52 Technical Data 110% 100% 0℃ -25℃ 32℃ 38℃ 50℃ 60℃ Figure 9-9 Temperature Dependency De-rating Curve of SCA25K-T-EU @PV=615V 4. Altitude de-rating: The altitude and output power de-rating details are illustrated in the figure below. Pin/Pn 100% -30%/km 2000 4000 Altitude(m) Figure 9-10 Altitude De-rating Curve 52 / 56...

  • Page 53: Quality Assurance

    Contact Information Quality Assurance 10.1. Liability Exemption 1. Exceed the quality assurance period of the product. 2. Cannot provide product serial number or the SN is not clear/complete. 3. Damage during transportation/storage/handling. 4. Misuse, abuse, intentional damage, negligence or accidental damage. 5.

  • Page 54: Warranty Clauses

    Contact Information 10.2. Warranty Clauses 1. For products that fail during the warranty period, our company will repair or replace new products free of charge. 2. Customer shall present the invoice of the product and date of purchase. At the same time, the trademark on the product should be clearly visible, otherwise we have rights to refuse quality assurance.

  • Page 55: Recycling

    Contact Information Recycling The product cannot be disposed of as or together with household wastes. When it is end of service life, please dispose in accordance with the local applicable regulation and standard, to prevent environment pollution, property losses or personal injury. More information, please consult your distributors, installers or product manufacturer.
  • Page 56 Contact Information Shanghai Chint Power System Co., Ltd. Headquarters: No.5999, Guangfulin Road, Songjiang District, Shanghai, 201616, China Switchboard: +86-21-37791222 Fax: +86-21-37791222-866001 Website: www.chintpower.com Service Hotline: +86-21-37791222-866300 Email: service.cps@chint.com 56 / 56...

This manual is also suitable for:

Sca6k-t-euSca8k-t-euSca10k-t-euSca15k-t-euSca20k-t-euSca25k-t-eu

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