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Austa AU Series User Manual

Grid-tied pv inverter
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AU Series
Grid-tied PV Inverter user manual
AU 50~75K3P
NINGBO AUSTA SOLAR TECH CO.,LTD.

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  • Page 1 AU Series Grid-tied PV Inverter user manual AU 50~75K3P NINGBO AUSTA SOLAR TECH CO.,LTD.

  • Page 3: Table Of Contents

    Contents Contents Thank you for choosing AUSTA on-grid PV inverter. In order to ensure your safety and proper use, please read the manual in details before using. Thanks for your cooperation! 1.Overview ..........................1 1.1 Use of this manual ....................1 1.2 Symbols ........................

  • Page 4: Overview

    Contents Overview 1.Overview 1.1 Use of this manual This manual mainly introduces installation, operating and maintenance of inverter and related technical parameters. It is suitable for people who install the inverters and do other related jobs. Readers need to have some knowledge of electric, electrical wiring and mechanics.

  • Page 5: Nameplate

    Take AU 50K3P for example 1.4 Operating instructions AU Series inverters are designed and tested strictly in accordance with relevant international safety standards. But for electrical and electronic equipment, its safety involves its installation, trial run, operation and maintenance of the whole process. Therefore, improper use or misoperation will also endanger: ...
  • Page 6  Operate and maintain inverters.  Before installation NOTE When receiving the product, the inverter should be checked first to see if it has been damaged during transportation. If you find any problem, please contact supplier or transportation company immediately. CAUTION ...
  • Page 7 WARNING  Before connecting the DC input of the inverter, make sure that the positive and negative polarity of the solar panel is correct, and the positive and negative polarity cannot be connected.  Cables used in PV power generation systems must be firmly connected, well insulated and with appropriate specifications ...
  • Page 8 NOTE  You can start the inverter again only after removing any fault that affects the security performance of the inverter.  If you need any repair service , please contact our equipment supplier or service provider.   NOTE Do not change the internal components of the inverter without authorization.
  • Page 9  The identifier on the inverter Characteristic Description This symbol indicates that after the inverter is disconnected from the power grid and solar panel, Wait for 10 minutes before touching the internal conductive device. Symbol indicates, hot surface, watch out for burns! To avoid scalding and fire, do not touch the hot surface when the machine is running.

  • Page 10: Description

    2. Description Contents Description 2.1. Brief Introductions On-grid PV power generation system usually is composed of solar panels, junction box, inverter, ammeter and power grid. The core of the system is PV grid-connected inverter. The sunshine irradiates on the surface of the solar panels, solar panels output DC, converted by inverter, then output AC of the same frequency and phase with the grid, and then feed into the grid.

  • Page 11: General Introduction

     Active and passive anti-islanding protection technology.  Comprehensive protection, higher reliability.  IP66 Outdoor design, suitable for harsh environmen .  RS485 communication.  Optional GPRS/WIFI communication function. 2.2 General introduction  Appearance and interface Fig 2-2 Appearance of AU 50K3P Figure 2-2 shows the product appearance.
  • Page 12 Fig 2-3 External Port Name Description Inverter’s DC input port, connect with + PV input port + port of PV arrays Inverter’s DC input port, connect with – PV input port - port of PV arrays Electric cut off between inverter and PV DC switch arrays Connect inverter with PC through this...

  • Page 13: Installation

    Installation 3. Installation Please carefully read below installation guide for AU 50/60K3P. 3.1 Installation Procedure Before installing and operating this product, please strictly abide by the installation sequence and warning symbols. Start Preparations Mechanical installation Electrical Connection Overall inspection Commissioning Fig 3-1 Installation procedure...

  • Page 14: Installation Preparation

    3.2 Installation Preparation  Check whether there is damage during transport Although we have carefully tested and inspected the inverter before shipping, there might be damage during transport. So please check them before installation. If there is any damage, please contact the shipping company or directly contact us.

  • Page 15: Choose Installation Location

    input terminal. Table 3-1: Scope of supply  Inverter storage If the inverter is not put into operation immediately, please store the inverter in a specific environment:  The inverter must be packed in the original packing case, sealed with adhesive tape, and placed in a clean and dry environment to prevent dust and water vapor erosion.
  • Page 16 wall There flammable material is material or flammable flammable gas in the installation space DANGEROUS Caution When the inverter is working, the temperature is high. Do not touch. Do not place the inverter with inflammable and explosive objects. 4. Do not install the inverter in the living area to avoid noise affecting daily life. 5.
  • Page 17 8. The temperature range of the installation environment should be between -25℃ and 60℃. Minimum ambient Maximum ambient temperature -25℃ temperature 60℃ NOTE When operating, the ambient temperature ranges from -25℃ to +60℃. When the ambient temperature exceeds the range, the output power of the inverter decreases. 9.
  • Page 18 11. If multiple inverters are installed horizontally and side by side, the distance between the shell is better than 250cm, and the top of the inverter should not be placed, and there should be enough clearance before and after, so as to facilitate system heat dissipation; It is recommended to stagger the inverters. 12.

  • Page 19: Mechanical Installation

    3.4 Mechanical Installation 3.4.1 setting tool  Wrench  Impact electric drill  Phillips screwdriver  Hexagon socket wrench  Megohmmeter and multimeter 3.4.2 Move inverter Before installation, take the inverter out of the packing box and transport it to the selected installation site.
  • Page 20 Fig 3-3 Drawing of fixed plate dimensions  If the chassis is to be installed on a concrete wall, drill holes on the wall based on the specifications of the fixing plate, secure the fixing plate to the wall using expansion bolts, and hang the chassis on the fixing plate.

  • Page 21: Electrical Connection

    Mounted panel fixing plate Accessory  After hanging the inverter on the fixing plate, use screws to fix the inverter on the fixing plate. Note: In the process of installing the inverter, please pay attention to keep the balance, so as not to hit the wall or other obstacles and damage the machine shell.
  • Page 22 3.5.2 Wiring requirements After the inverter is firmly installed to the installation site, it can be connected to the PV system. Electrical connections must comply with local laws and regulations. The following are the wiring requirements of the inverter.  PV arrays PV arrays open-circuit voltage should not exceed MPPT working voltage range, PV arrays to power can be configured to 50/60/70/75kW.
  • Page 23 NOTE Multiple inverters cannot share one circuit breaker. Load cannot be connected between the inverter and the circuit breaker.  leakage protector The inverter is equipped with integrated leakage current monitoring unit, which can distinguish fault current from capacitance leakage current. The inverter will quickly disconnect from the grid when it detects the leakage current at the maximum allowable value.
  • Page 24 Cross-sectional area of the AC cable(mm Length of AC cable(m) 0~50 50~100 >100 Table 3-3 Length recommended for different cross-sectional areas WARNING Do not connect the phase lines L1, L2, and L3 and line N on the AC side to anchors. Ensure that cables are securely connected to prevent cable insulation from being squeezed or stressed.
  • Page 25 NOTE The following precautions must be met, otherwise the damage caused by the inverter will not be covered by the warranty. Ensure that the maximum short-circuit current on the DC side is within the allowable range of the inverter; otherwise, the inverter may be irretrievably damaged.
  • Page 26 Cross-sectional Cable outer Maximum withstand Maximum input current area diameter voltage of each string 4~6mm 6-9mm 1100V 10AWG~12AWG Table 3-4 DC Cable Requirements DC cable connection steps DANGEROUS High voltage! Electrical shock! There may be high voltage in the inverter! Before electrical operation, make sure that all cables are not live.
  • Page 27 3. Route the cable through the cable sealing sleeve. 4. Insert the wiring terminal into the insulation sleeve until it is fastened. Gently pull the cable to ensure that it is firmly connected. 5 Tighten the sealing sleeve and insulation sleeve with 2.5 to 3N.m force. a.Male terminal b.Female terminal c.Male housing body...
  • Page 28 NOTE  Before connecting the DC terminal to the inverter, check the positive and negative polarity of the PV arrays and insert the terminal into the input terminal at the bottom of the inverter.  In the same MPPT, it is not allowed to reverse a single PV array. Otherwise, the system or inverter will fail permanently.
  • Page 29 ● Grounding WARNING Since the inverter is a transformerless type, it is required that the positive and negative poles of the PV array cannot be grounded, otherwise the inverter will not operate normally.  Grounding system In this PV power generation system, all non-current-carrying metal parts and equipment housings should be grounded (such as the bracket of the PV arrays, the inverter housing, etc.).

  • Page 30: Trial Run

    There is a secondary protection grounding terminal at the bottom of the inverter, which must be grounded. WARNING  The grounding connection of the secondary protection grounding terminal cannot replace that of the PE terminal in the AC cable. Ensure that both terminals are reliably grounded. Otherwise, manufacturers and suppliers does not assume any responsibility for possible consequences.
  • Page 31 Trial run is an important step for PV system installation. Proper trial run can prevent fire and other accidents. Correctly connect the PV arrays, inverter and ac power grid according to the installation process described above, and check the content before starting the inverter. ...
  • Page 32  Emergency shutdown process: If an emergency shutdown is required, disconnect the CIRCUIT breaker and DC switch on the AC side in time. Otherwise, personal hazard may occur. NOTE Please strictly follow the above steps, otherwise the inverter will not work normally. 3.6.4 Stop the inverter It is not necessary to shut down the inverter manually under normal circumstances, but it is necessary to shut down the inverter for maintenance or operation.

  • Page 33: Monitoring

    Smart device Figure 4-2 WIFI/GPRS communication system mode After installing the GPRS or Wi-Fi data collector module, you can monitor the operation of the PV system through the AUSTA App program “Ausat Solar”.

  • Page 34: Austa Pv Wizard App -Solarlnfo

    ● WIFI/GPRS installation 4.2 AUSTA PV Wizard App -Solarlnfo Austa Web/Austa Solar APP is rich in functions, covering the entire life cycle of the power station, it perfectly meets the needs of one-stop management.Austa rovides installers, operation and maintenance providers, and investors with various tools covering the development period, construction period, and operation and maintenance period of the power station.At the same time, it also provides practical...

  • Page 35: Display Panel

    4.3.1 Control panel with LCD display The panel of the AU series grid-connected PV inverter includes a LCD display. In order to better carry out the interactive operation of the man-machine interface, two LED indicator and a voice switch are set on the panel, as shown in Figure 4-2.
  • Page 36 Fig 4-3 AU series indicator panel ● LED display status Function Status Description Grid-connected and power generation DC is normal, AC is not powered on Running DC is normal, grid-connected standby Equipment failure DC switch is not powered on The communication cable or communication...

  • Page 37: Operating

    5.Operating Contents Operating 5.1 Working Mode The working modes of the inverter include-start mode, run mode, and standby mode. In each working mode, the LCD displays corresponding information. NOTE The data in the following tables and graphs are only sample data, and take AU 60K3P as an example, the actual display content and data may change.
  • Page 38 Fig 5-1 Start interface NOTE After the PV arrays voltage> 300V, the system will count down for 20 seconds. Within 20 seconds, the PV array voltage will always meet the grid-connected power generation requirements before it will switch to the operation mode. ●...
  • Page 39 In running mode, the screen display content is shown in Table5-3 (take AU 50K3P as an example) C Phase voltage: 230V Power :40000W C phase current: 10.2A Today's power 30.5kwh Mains frequency: 50Hz Total power generation Real-time temperature: 30℃ 90000 Kwh Daily power generation time DC voltage1: 300V 11:30:40...
  • Page 40 2. When you are off the network, tap the position of the indicator of the sound control switch, and the background indicator of the LCD is on. If you do not operate the LCD any more, the background indicator is off 2 minutes later and the LCD returns to the default time display.
  • Page 41 la Hig The A-phase current is over limit lb Hig The B-phase current is over limit lc Hig The C-phase current is over limit I_no mat Current mismatch sys Err system failure I1 Hig PV array 1 current is over limit I2 Hig PV array 2 current is over limit I3 Hig...

  • Page 42: Power Generation Process

    NOTE The fault information displayed on the above LCD screens only automatically switches to the second screen in off-network mode at regular intervals. Display “No NET” in off-grid state if there is no fault information. Note:When a fault occurs, the LCD switches between the default screen and the fault screen. ...

  • Page 43: Disconnect From Grid

    1.Switch on DC and AC circuit breakers, the inverter will enter start-up mode. 2.If input voltage on DC side exceeds 300V, AC side voltage in range 310Vac~480Vac or 422Vac~550Vac, and grid frequency is normal, inverter begins countdown. 3.The DC side starts after a countdown of 20 seconds; 4.After the DC bus voltage stabilizes, the inverter side starts to work and connects to the grid for power generation.

  • Page 44: Maintenance

    Contents 6.Maintenance Maintenance DANGEROUS Do not open the machine. Users trying to repair the machine by themselves may cause electric shock and fire hazard. 6.1 Maintenance Due to the influence of ambient temperature, humidity, dust and vibration, the internal components of the inverter will age and wear, which will affect the service life of the inverter.
  • Page 45 Failure solution 1. Disconnect AC side circuit breaker. 2. Disconnect DC side circuit breaker. LED indicator and LCD 3. Check the input voltage of the PV arrays (whether it is lower screen do not light up than 200V). 4.If the above conditions are met, check the circuit breaker. 1.
  • Page 46 4. Please check whether the ventilation of the machine is normal, whether the hook-up installation is correct, and whether the air duct is unblocked. 5. Whether the output power exceeds the rated value. 1. Disconnect AC side circuit breaker. 2. Disconnect DC side circuit breaker. Grounding fault 3.Check whether the ground resistance of each group of PV arrays is greater than 2MΩ.

  • Page 47: Specification

    Contents 7.Specification Specification 7.1 Specification Technical Data AU50K3P AU60K3P AU70K3P-HV AU75K3P-HV DC Input Data Max. DC input power (KW) 112.5 Max. DC input voltage(VDC) 1100 MPPT voltage range(VDC) 250～1000 Max. DC current(A) 45/45/45 Recommended working voltage(VDC) MPPT number Max. input strings per MPP tracker 4/4/4 AC Output Data Rated output power (KW)

  • Page 48: Quality Guarantee

    The warranty period of this product shall be subject to the contract.  condition  AUSTA will repair or replace the faulty products free of charge during the warranty period.  Unqualified products after replacement shall be returned to AUSTA. ...
  • Page 49 Thank you for taking time to share your feedback. Your comments and suggestions will help us to serve you better. Please send fax or e-mail your feedback, we will respond you within 24 hours. Contact Information NINGBO AUSTA SOLAR TECH CO.,LTD. Tel: +86 574 89137130 Email: marketing@osdasol.com Web:www.austasolar.net Add: 1-1 NO.136 Haichuan Road Jiangbei...
  • Page 50 NINGBO AUSTA SOLAR TECH CO.,LTD. Tel: +86 574 89137130 Email: marketing@osdasol.com Web:www.austasolar.net Add: 1-1 NO.136 Haichuan Road Jiangbei District Ningbo Zhejiang P.R. China...

This manual is also suitable for:

Au50k3pAu60k3pAu70k3p-hvAu75k3p-hv

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