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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 18~30K3P-LV
NINGBO AUSTA SOLAR TECH CO.,LTD.

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  • Page 1 AU Series Grid-tied PV Inverter user manual AU 18~30K3P-LV NINGBO AUSTA SOLAR TECH CO.,LTD.

  • Page 3: Table Of Contents

    Contents Thank you for choosing AUSTA on-grid PV inverter. In order to ensure your safety and proper use, please Contents 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 1.Overview 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: Description

    Contents 2. Description Description 述 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 6: General Introduction

     Transformerless, highest efficiency is 98.7%.  Wide input voltage, MPPT efficiency is 99.9%.  Active and passive anti-islanding protection technology.  Comprehensive protection, higher reliability.  IP66 Outdoor design, suitable for harsh environment .  RS485 communication.  Optional GPRS/WIFI communication function. 2.2 General introduction ...

  • Page 7: Inverter Dimension

    Table 2-1 External interface 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 8: Installation

    Contents Installation 3. Installation The following are the installation instructions for this product. Please read these instructions carefully to help you install it correctly. 3.1 Installation Procedure Before installing and operating this product, please strictly abide by the installation sequence and warning symbols.

  • Page 9: 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 10: Installation Environment Requirements

    and testing by professionals. 3.3 Installation environment requirements The selection of the inverter installation environment plays an important role in its safe operation, performance guarantee, and life guarantee. Here are some basic requirements:  The inverter protection level reaches IP65 and can be used for indoor or outdoor installation. ...
  • Page 11  The inverter should be installed in a location where electrical connections, operation and maintenance are easy.  The installation height is preferably such that the LCD screen is at eye level for easy operation of the LCD display panel. ...
  • Page 12 Environment humidity: Minimum ambient Maximum ambient 0~100%No temperature:-25℃ temperature：60℃ condensation +60℃  The installation environment requires cleanliness.  The inverter needs to be installed uprightly, and cannot be placed horizontally or upside down, or tilted. If multiple inverters are installed horizontally side by side, it is best to keep the distance between them at least 50cm, and no objects should be placed on the top of the inverter.

  • Page 13: Mechanical Installation

     Do not install the inverter in a place where children can touch it. During the operation of the inverter, the local temperature (such as the radiator) is high, so as to avoid burns or electric shock. DANGEROUS Do not place the inverter with inflammable and explosive objects. CAUTION During the operation of the inverter, the temperature is high, please do not touch it! ...
  • Page 14 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 15: Electrical Connection

    Mounted panel Full thread bolt Metal support fixing plate Accessory Fig 3-6  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 16 WARNING Ensure that the input Dc voltage does not exceed 1000V. Higher input voltage may permanently damage the equipment and cause other losses. In this case, the company does not undertake warranty and liability. 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.
  • Page 17 COM terminal Data collector DC surge protection device Breaker：  In order to ensure the safe installation and operation of the equipment, it is necessary to configure a manual circuit breaker. The circuit breaker should comply with the local safety regulations and standards, and meet the basic overcurrent and overvoltage protection capabilities.
  • Page 18 2) Follow the instructions below to strip the cables as shown in the picture below. Fig 3-7 AC stripping NOTE：S2 (insulation stripping length) is 2mm-3mm longer than S1 (OT cable terminal crimping area). 3） Remove the insulation layer of the cable through the cable crimping area of the OT terminal, and then crimp the terminal using a hydraulic crimping tool.
  • Page 19 NOTE Except for the AC side terminals, the terminals on other sides of the inverter are plug-in  type. It is best to use flexible cables for AC side cables.  Tighten the tightening nut of the AC cable gland at the bottom of the box. ...
  • Page 20  DC cable standards Cross-sectional area(mm Type Cable outer diameter Range Recommend PV1-F 5.5~9mm 12AWG~10AWG 12AWG Table 3-5 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. Before the electrical connection of the inverter is completed, the AC circuit breaker switch shall not be installed.
  • Page 21 a. Male terminal b. Female terminal c. Male housing body d. Female housing body 6. Verify that the polarity of the PV arrays cables is correct. NOTE If the DC input polarity is reversed, the inverter will not work properly. 7.
  • Page 22 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 23 site conditions) to achieve equipotential connection . Grounding system Grounding diagram  Secondary protection grounding 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 ...
  • Page 24  Cable grounding Item Description Screw M6×12 Locking gasket gasket cord end terminal green and yellow ground wire Secondary protection grounding connection. The cross-sectional area of the yellow-green line must be the same as Connecting parts that of the PE cable in the AC cable. (included in the delivery).

  • Page 25: Monitoring

    Figure 5-1 RS485 (standard MODBUS protocol) communication system mode 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 26 Collector description ●...

  • Page 27: Austa Pv Wizard App -Solarlnfo

    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 28: Trial Run

    5. Trial run Contents Trial run 5.1 Inspection before trial run 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 29: Shut Down

     Dc switch to ON position;  Close the AC side circuit breaker;  When the conditions required for normal operation of the machine are met, the inverter will automatically start and connect to the grid for power generation;  Grid-connected PV inverter does not need manual control after normal operation, and has automatic shut down and start function after failure.

  • Page 30: Shut Down & Dismantle

    6. Shut down & Dismantle hut down Contents & Dismantle 6.1 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. To disconnect the inverter from the AC/DC power supply, follow the following steps.

  • Page 31: Operating

    LED indicator and a voice switch are set on the panel, as shown in Figure 7-1. LCD panel LED indicator Voice switch Fig 7-1 AU series LCD control panel LED display status LED indicator Description Grid-connected operation indicator (normal operation,...
  • Page 32 For the indicator panel of the TLC series grid-connected PV inverter, in order to better carry out the interactive operation of the man-machine interface, 3 LED lights are set on the panel, as shown in Figure 7-2. LED indicator Fig 7-2 AU series indicator panel ● LED display status Function Status...

  • Page 33: Startup Mode

    7.2 Startup mode The start mode means that the light conditions meet the DC start conditions of the inverter, but the grid has not yet been connected to power generation. In this mode, the inverter information is displayed in sequence. After the display is completed, the inverter meets the grid-connected conditions and switches from the startup mode to the running mode, otherwise, it switches to the standby mode.
  • Page 34 In running mode, the LCD refreshes the contents every two seconds, so the contents are only valid for the current two seconds.The LCD displays the default information. After 30 seconds, the LCD displays the default information, as shown in Figure 7-4. Today's power generation Total power generation 30.5kwh...
  • Page 35 NOTE If the DC side is powered off, it will be a new day for the inverter when it is powered on again, and the total energy generated on that day will be recalculated. ● Standby mode The DC start and the grid connection condition is not met is the standby mode. In the standby mode, the inverter continuously detects whether the grid-connected power generation conditions are met.

  • Page 36: Power Generation Process

    Tap the position of the voice-activated switch logo, the LCD background display light will be on, and the switching interface will be displayed at the same time. If the LCD screen is no longer operated, after 20 seconds, the background light will be off, and the LCD screen will return to the default display interface. NOTE The above various LCD display interfaces are switched by tapping the position of the voice-activated switch logo.

  • Page 37: Maintenance

    Contents 8.Maintenance Maintenance DANGEROUS Do not open the machine. Users trying to repair the machine by themselves may cause electric shock and fire hazard. 8.1 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 38 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 180V). 4.If the above conditions are met, check the circuit breaker. 1.
  • Page 39 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 40: Specification

    9. Specification Contents Specification 9.1 Specification AU18K3P-LV AU20K3P-LV AU25K3P-LV AU30K3P-LV Technical Data DC Input Data Max. DC input power (KW) 27000W 30000W 37500 45000W Max. DC input voltage(VDC) 1000 Max. DC input current(A) 30A/30A/30A/30A 36A/36A/20A/20A MPPT voltage range(VDC) 180~1000 Recommended working voltage(VDC) MPPT number Max.

  • Page 41: 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 42 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 44 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:

Au18k3p-lvAu20k3p-lvAu25k3p-lvAu30k3p-lv

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