ABB UNO-7.6-TL-OUTD-S-US-A Product Manual
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ABB UNO-7.6-TL-OUTD-S-US-A Product Manual

Solar inverters (7.6 to 8.6 kw)
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ABB solar inverters
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UNO-7.6-8.6-TL-OUTD-S-US-A
(7.6 to 8.6 kW)

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Summary of Contents for ABB UNO-7.6-TL-OUTD-S-US-A

  • Page 1 ABB solar inverters Product manual UNO-7.6-8.6-TL-OUTD-S-US-A (7.6 to 8.6 kW)

  • Page 2: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS This manual contains important safety instructions that must be followed during installation and maintenance of the inverter. SAVE THESE INSTRUCTIONS! Keep this document in a safe place near the inverter for easy access during installation and maintenance. THE INSTALLER MUST READ THIS DOCUMENT IN ITS ENTIRETY BEFORE INSTALLING OR COMMISSIONING THIS EQUIPMENT.
  • Page 3 1 - Introduction and safety 2 - Installation location 3 - Mounting and wiring 4 - Operations 5 - Troubleshooting 6 - Maintenance 7 - Appendix UNO-7.6-8.6-TL-OUTD-S-US-A Product Manual BCG.00751.0_AA Rev 1.1 © Copyright 2014 ABB. All Rights Reserved. - 3 -...

  • Page 4: Table Of Contents

    ontents ntroduction and safety ........................7 Warnings in this document ........................7 Equipment safety warnings ....................7 General installation warnings....................8 Assembly warnings ......................8 Electrical connection warnings ...................8 Safety instructions ..........................9 General information ......................9 Thermal and voltage hazards ....................9 Clothing and protective devices ..................9 Location of safety notices and labels ................10 Appropriate usage ..........................11 Conditions of use ........................11...
  • Page 5 perations ............................43 Monitoring and data transmission .....................43 Types of data available ......................43 User interface ............................43 Display and keypad ......................44 LED indicators ........................45 Descriptions of symbols and display fields ..............46 Cyclical display of general information................47 Statistics menu ........................48 Settings menu ........................49 Information Menu ........................58 Zigbee Menu ........................59 Commissioning .............................60...
  • Page 6 - 6 -...

  • Page 7: Introduction And Safety

    Introduction and safety arnings in this document This is a list of special safety symbols used in this manual that highlight potential safety risks and/or useful information. The symbol usage is described below: CAUTION The reader should stop, use caution and fully understand the operations explained before proceeding.

  • Page 8: General Installation Warnings

    1- Introduction and safety eneral installation warnings The UNO transformerless inverter is designed and tested according to international safety requirements (UL1741/IEEE1547); however, certain safety precautions must be observed when installing and operating this inverter. All operations regarding transport, installation start up, and maintenance, must be carried out by qualified, trained personnel and in compliance with all prevailing local codes and regulations.

  • Page 9: Safety Instructions

    The equipment has been manufactured in accordance with the strictest accident-prevention regulations and supplied with safety devices suitable for the protection of components and operators. Inform ABB about non-standard installation conditions. The instructions given in the manual do not replace the information and warnings on the safety labels mounted on the product.

  • Page 10: Location Of Safety Notices And Labels

    W ARNING www .abb.com/solar Countr y of Origin Italy SOLAR UTILITY INTERACTIVE TRANSFORMERLESS INVER T ER MODEL: UNO-7.6-TL-OUTD-S-US-A Integral DC Ground F a ult Detector/Interrupter Protection provided. Risk of Electric Shock. DC RA TING Normally Grounded Conductors May Be Nominal Input Opera...

  • Page 11: Appropriate Usage

    1- Introduction and safety ppropriate usage The UNO Inverter is a photovoltaic inverter that converts direct current of a connected PV array into alternating current and feeds that power into the AC utility grid. This inverter is designed for outdoor use, but can be used indoors if installed to specified environmental and mounting parameters stated in this manual, and adherence to the National Electric Code.

  • Page 12: Arc Fault Detection (Afd)

    (12 fuses and 12 fuse holders, considering positive and negative inputs). See Optional DC fused inputs in section 3. Unit Weight – 82 lbs/ 37 KG 7.6 Kw UNO-7.6-TL-OUTD-S-US-A Dimensions (H x W x D) – INVERTER ONLY: 18.9 x 22.9 x 8.8 in (480 x 620 x 225mm) INCLUDING DC SWITCH WIRING BOX: 8.6 Kw UNO-8.6-TL-OUTD-S-US-A...

  • Page 13: Regulatory Nameplate

    ® UL 1741 CSA-C22.2 No. 107.1-01 www.abb.com/solar Country of Origin Italy SOLAR UTILITY INTERACTIVE TRANSFORMERLESS INVERTER MODEL: UNO-7.6-TL-OUTD-S-US-A DC RATING Nominal Input Operating Voltage 380 V Max. Input Voltage 600 V Range of Input Operating Voltage 90 - 580 V...
  • Page 14 1- Introduction and safety - 14 -...

  • Page 15: I Nstallation Location

    Installation location ransportation and handling When being transported, the inverter and electronic components must be protected from vibration, mechanical shocks, humidity, etc. ncoming inspection It is the customer’s responsibility to examine the condition of the unit. Upon receipt of the inverter check the following: •...
  • Page 16 2 - Installation Components for all models Description QTY/part# 3 pin connector for configurable relay 82000005907-G 8 pin connector for communication signals 82000005908-G L-key tool; TORX WRENCH;90° 81510000077 Mounting Kit Includes items below XAK.P0101.0 1 Wall bracket for mounting, 1 (mounting kit) 6 screws;3x70mm;DIN 7981 A2 6 wall anchors, 1 screw;...

  • Page 17: Select The Installation Location

    2 - Installation elect the installation location The inverter must be installed by qualified installers and/or licensed electricians ac- cording to the applicable local code regulations (NEC, CEC, and other). Once physically mounted, the wiring must be carried out with the equipment discon- nected from the grid (power disconnect switch open) and the photovoltaic panels shaded or isolated.

  • Page 18: Installation Position

    2 - Installation nstallation position When planning the installation, maintain clearance distances illustrated below to allow normal control functions and easy maintenance operations. When choosing the location and position, comply with the following conditions: • Install on a wall or strong structure capable of bearing the weight. •...
  • Page 19 2 - Installation When installing multiple inverters side-by-side, mounting handles must be considered in measurements. 6” 2” 23.5” across cover 25” handle to handle DC Disconnect & Wiring Box DC Disconnect & Wiring Box 8” Recommended clearance of 2” between inverters is not required, but a reasonable clearance must be maintained to allow easy access to handles for mounting/dismounting, and for product and warning labels to be visible.
  • Page 20 2 - Installation - 20 -...

  • Page 21: Ounting And Wiring

    Mounting and wiring Labeled illustration of UNO inverter 2 0 . 4 i n - 5 1 7 m Label Description Label Description Mounting bracket Wiring box cover Upper mounting slots DC disconnect switch Lower mounting slots Lifting handle (1 each side) Inverter cover Bottom locking point for securing wiring box to mounting bracket.
  • Page 22 3 - Wiring 8.85 in/ 225 mm Label Description Label Description DC disconnect switch Signal cable openings with plastic threaded plug, 1/2“ DC cable opening with plastic Gore vent pressure equalizer threaded plug , 1”* AC cable opening with plastic 3/4 “, 1”...

  • Page 23: Wall Mounting

    3 - Wiring all mounting The overall dimensions of the mounting bracket are expressed in millimeters and inches. 17mm 0.67” 734.8mm 721mm 28.9” 28.4” 688mm 27” 599mm 23.6” 349mm 13.7” 303mm 11.9” 184.7mm 7.27” 17.84mm 0.7” - 23 -...
  • Page 24 3 - Wiring • Using a level, position the mounting bracket 01 on the wall 10 x 10 mm Ø and use it as a drilling template. • Drill the required holes using a 10mm/0.39” bit; holes must be about 70mm/2.75” deep. •...

  • Page 25: Wiring Details

    AC output circuit. To protect the AC connection line of the inverter, it is recommended to install a device for protection against overcurrent with the following characteristics: UNO-7.6-TL-OUTD-S-US-A UNO-8.6-TL-OUTD-S-US-A Typical installations use a 2-pole/600V rated bi-directional thermal-magnetic Type circuit breaker, UL489 or equivalent.

  • Page 26: Wiring Box Components

    3 - Wiring iring box components To access the wiring terminals in the switchbox, the cover 05 must be removed by loosening the six captive screws using the Torx screwdriver provided. When connection operations are complete, re-install the cover 05 and tighten the cover screws with at least 2.0Nm (17.7 in-lbs) torque to maintain waterproof sealing.

  • Page 27: Electrical Connection To The Pv Field - Dc Side

    3 - Wiring lectrical connection to the PV field - DC side Verify that the DC voltage in the wiring box has the correct polarity and is within the operational range prior to terminating. To prevent electrocution hazards, all the connection operations must be carried out with the DC disconnect switch (06) turned to the OFF position and locked out.

  • Page 28: Installing Jumpers For Parallel Configuration

    3 - Wiring nstalling jumpers for parallel configuration The UNO is configured in the independent mode as default. Parallel configuration is made by using the two jumpers provided to short the positive and negative inputs on the DC disconnect switch. In addition, the parallel input mode must be selected in the UNO display menu and can be done as part of the commissioning procedure described in section 4.
  • Page 29 3 - Wiring Insert jumpers on positive and negative inputs • Gently loosen 2 screws in positive input until • Gently loosen 2 screws in negative input until jumper can fit in same slot as wire. jumper can fit in same slot as wire. •...

  • Page 30: Uno 8.6Kw - External String Combiner With Single Mppt Input

    3 - Wiring NO 8.6kw - External string combiner with single MPPT input When using an external string combiner with a single input for the UNO 8.6kW, it is not possible to use the 10AWG wire with the 48A power level in the switchbox. In this case, the wires of channel 2 terminal block must be connected instead to the channel 1 terminal block in order to share the current, as illustrated below.

  • Page 31: Optional Dc Fused Inputs

    3 - Wiring ptional DC fused inputs The wiring box is designed with room to accommodate three fused DC inputs per MPPT channel resulting in a total of six fused inputs (12 fuses and 12 fuse holders, considering positive and negative inputs). An optional kit is available for addition of the DC fused inputs;...
  • Page 32 3 - Wiring DC terminal blocks Place 6 fuse holders on DC side, in two groups of 3 each. Attach by hooking fuse holder at top of din rail and snapping onto bottom of din rail. Fit 1 terminal feeder atop each group.
  • Page 33 3 - Wiring AC terminal blocks Use a small, flat head screw driver to loosen and move end blocks, AC terminal block, and AC ground terminal on the din rail by pushing screw driver into space at top of block and lifting up and off of din rail.

  • Page 34: Grid Output Connection (Ac Side)

    3 - Wiring Reconnect DC wiring Wires removed from DC terminal block in step 1 are labeled, +VIN1, +VIN2, -VIN1, -VIN2. Connect wires in terminal feeders of respective fuse holder groupings as illustrated below. Insert the 12 fuses provided in fuse holders. rid output connection (AC side) Wire must be sized based on ampacity requirements of the NEC or other applicable prevailing code, but no smaller than #8Cu.

  • Page 35: Connection To Ac Terminal Block

    3 - Wiring onnection to AC terminal block AC grid wiring is based on the grid standard shown in the utility configuration table below. • Run an approved raceway between inverter and external AC OCPD. Remove the threaded plastic plug and nut from the AC cable opening 10. •...

  • Page 36: Communication Card Connections

    3 - Wiring ommunication card connections Wiring for the RS-485 communication system and hardwired control options must be routed through the switchbox and into the main inverter chassis for termination. Communication and signal wiring connections are described on the following pages. It is necessary to open the inverter cover 04 to access the communication card which is located in the bottom right corner of the inverter box.

  • Page 37: Serial Communication Connection (Rs-485)

    3 - Wiring Communication and signal wiring connections are located on the main inverter board and illustrated below. Label Description Multi-function relay Remote control, RS-485, Ethernet Connection of RS-485 line on RJ45 connector Switch S3 for termination resistance CR2032 battery housing (3V-81566200029-G) Arc fault detection (AFD) connection on main board Radiomodule slot board (Zigbee)* WiFi board*...
  • Page 38 3 - Wiring If conduit is used, run the appropriate raceway and terminate it to the wiring box chassis using a conduit connector that matches the raceway. The conduit must be terminated at one of the two ½” signal openings 11. If the terminal blocks are used, the signals RTN, +T/R and –T/R (shown below) have to be cabled.

  • Page 39: Daisy Chain Units For Connection To A Monitoring System

    3 - Wiring The two RJ45 connectors available for the RS-485 communication are equivalent to each other and can be used interchangeably for the input or output of the line when creating a daisy chain connection of the inverters. aisy chain units for connection to a monitoring system The RS-485 terminal block connectors a02 or RJ45 connectors a03 can be used to connect a single inverter or implement a multi-unit wiring configuration (daisy chain).

  • Page 40: Addressing Each Inverter

    3 - Wiring ddressing each inverter When multiple inverters are connected on a single RS-485 bus, it is necessary to assign a different RS-485 address to each unit. The address on the inverter is set through the user interface on the display panel (section 4). Address values are assigned manually using any value in the range 2 to 63.

  • Page 41: Configurable Relay Connection (Alarm)

    3 - Wiring onfigurable relay connection (Alarm) The inverter has a multi-function relay accessible at terminal block a01 and it is provisioned with a removable screw-terminal mating connector to simplify connections to the terminal block. The relay output can be configured to activate a visual and/or audible alarm or be utilized by another control such as a building control system.
  • Page 42 3 - Wiring - 42 -...

  • Page 43: Perations

    One of the first rules for preventing damage to the equipment and injury to the opera- tor is to have a thorough knowledge of the user interface operations. ABB cannot be held responsible for damage to the equipment or the operator if caused by incompetence, insufficient qualifications or lack of training.

  • Page 44: Display And Keypad

    4 - Operations isplay and keypad There are three indicators on the LED panel and four buttons on the keypad. LEDs indicate the operating state of the inverter. The keypad is used to review data on the cyclical display area b10 and access the data logged internally on the UNO, using the menus described in this section.

  • Page 45: Led Indicators

    4 - Operations ED indicators In their various combinations, the LEDs can indicate conditions that are different from the single one. The table below shows the possible combinations of activation of the LEDs in relation to the operating state of the inverter. Warning and Error messages referenced below are described in Troubleshooting, section 5.

  • Page 46: Descriptions Of Symbols And Display Fields

    4 - Operations escriptions of symbols and display fields b1 -Indicates the transmission and reception of data through the RS-485 line b2 - Indicates the presence of the RS-485 communication line b3- Reports the presence of a line of radio communication (Radiomodule card installed) b6- Warning symbol indicates presence of power limiting, input voltage out-of-range or power limitation imposed by the grid b7- Reports power limiting due to high internal temperature...

  • Page 47: Cyclical Display Of General Information

    4 - Operations yclical display of general information The graphic display area b10 consists of 2 lines with 16 characters per line. When moving through the menu using the buttons of the keypad, area b10 is used to: • display the operating state of the inverter and the statistical data •...

  • Page 48: Statistics Menu

    4 - Operations tatistics menu The Statistics menu is a view only display of internally logged inverter data. Last 7 days Statistics Lifetime Last month Partial Last 30 days Today Last xxx Last 365 days User period Start xxxxxxxx End xxxxxxxxx Lifetime - Displays the total statistics for lifetime operation: •...

  • Page 49: Settings Menu

    4 - Operations Once the start and end dates for the user periods have been selected, the following data is available: • E-use: Energy produced during the selected period • Val. : Value of production for the selected period calculated with the currency and conver- sion coefficient set in the relevant section of the SETTINGS menu •...
  • Page 50 Using the UP and DOWN keys on the inverter display panel, scroll to select the values for modification. ABB cannot be held responsible for any negative effects resulting from modifications of inverter set points. The set points in the table below should only be changed with the written permission of the local utility.
  • Page 51 4 - Operations Parameter Definition Default Adjustable Value Ranges SET U>> Indicates the value of the absolute over volt- 319 V Fixed age set point beyond which the inverter dis- connects from the grid. [115% of Nominal line to neutral Voltage] SET U<<...
  • Page 52 4 - Operations Parameter Definition Default Value Adjustable Ranges SET U>> Indicates the value of the absolute over voltage 115% of Nomi- Fixed set point beyond which the inverter disconnects nal line to neu- from the grid tral Voltage [115% of Nominal line to neutral Voltage] SET U<<...
  • Page 53 4 - Operations Parameter Definition Default Value Adjustable Ranges TIME Indicates the value of the countdown timer asso- 0.16 sec 160 msec to 300 sec U<< ciated with the absolute under voltage setpoint U<< SET TIME F>> Indicates the value of the countdown timer asso- 0.16 sec 160 msec to 300 sec ciated with the absolute over frequency setpoint...
  • Page 54 4 - Operations Parameter Definition Default Value Adjustable Ranges U>(10 min) Provides ability limit power Disable Disable or Enable Der. for 10 minutes due to the high aver- age voltage value set by the parameter Set U>(10 min) Slow ramp Enable/disable the gradual feeding of power af- Enable Disable or Enable...
  • Page 55 4 - Operations W) chosen by the user from a list (the list may also show choices that are not available for the specific model). • CREPUSCULAR: the relay switches only when the input voltage exceeds the input voltage set for connection to the grid. The operating modes are described in further detail below: Production: the relay switches when a connection to (or disconnection from) the grid occurs.
  • Page 56 4 - Operations menu allows programming of a time interval for which the inverter stays connected to the grid in a situation where the input voltage has dropped below the undervoltage limit (set at 70% of Vstart). The default time is set at 60 sec. The user can set it from 1 to 3600 sec. Example: with the UV Prot.time set at 60 seconds, if the VIN drops below 70% of Vstart at 9:00, the inverter stays connected to the grid (taking power from it) until 9:01.
  • Page 57 4 - Operations Standard curve for Mode 3, cos(phi) in f(P) Mode 4 - Q = f(U): Reactive power as a function of the grid voltage measured by the • inverter. To enable this mode, select Enable and then OK (using the UP / DOWN arrows). When enabled, Use def curve will appear on the display, allowing you to set the control curve.

  • Page 58: Information Menu

    4 - Operations MPPT - This section of the menu allows setting the parameters of the maximum power point tracking (MPPT) function. This function is useful when there are shaded areas on the PV array that can create several maximum power points in the work curve. •...

  • Page 59: Zigbee Menu

    4 - Operations Part No. - Displays the UNO part number. Serial No. - Displays the UNO serial number and the week (from 1 to 52) and year of manufacture. Firmware - Displays the revision of the firmware installed in the equipment. Country selector - Display and configuration menu for grid standard.

  • Page 60: Commissioning

    4 - Operations ommissioning Do not place any items on the inverter during operation. Do not touch the heat sink when the inverter is operating, as some parts may be hot and cause burns. onfigure inverter settings The following settings can be configured before or after commissioning the inverter using the display menu.

  • Page 61: Power On The Inverter

    4 - Operations ower ON the inverter Turn the DC disconnect switch in the ON position. If there are two separate external disconnect switches (one for DC and the other for AC), first close the AC disconnect switch and then the DC disconnect switch. Once the inverter is powered, icon b14 comes on to indicate that the voltage from the photovoltaic array has reached the Vstart threshold (voltage...

  • Page 62: Dynamic Behavior Of The Display During Operation

    4 - Operations Once the connection sequence is complete, the inverter starts to operate and indicates correct operation by the green LED lighting steady on the LED panel. This means there is sufficient sunlight to feed power into the grid. If there is not sufficient sunlight, the unit will repeat the procedure until all the parameters controlling connection to the grid (grid voltage and frequency, confirmation of no ground fault) are within the range.

  • Page 63: Troubleshooting

    Troubleshooting rc fault detection self-test errors An autotest circuit is included in the module design of the DC ARC FAULT DETECTOR and INTERRUPTOR (AFDI) solution. The AFDI performs a self-test when the system is started, (i.e. every morning when sunlight is sufficient for grid connection).

  • Page 64: Obtaining The Service Level Password

    5 - Troubleshooting btaining the service level password An advanced password can be provided to authorized installers to allow access to the service menu upon completion of required documentation. Contact customer service at 877-261-1374 to request this password. The password obtained is valid for a period of 15 days. Because the service level password is date sensitive, it is necessary to have the correct date and time set on the inverter display to successfully use the password.
  • Page 65 5 - Troubleshooting Display Message Causes Solution Ground Fault The alarm is generated when If possible, measure the insulation resistance us- Red LED ground leakage current is de- ing a megohmmeter positioned between the photo- tected in the DC section of the voltaic field (positive terminal short-circuited to the system.
  • Page 66 5 - Troubleshooting Display Message Causes Solution E005 The alarm occurs when there Error inside the inverter that cannot be checked ex- Comm.Error are communication problems be- ternally. If the problem persists (after switching the Internal Communi- tween the control devices inside inverter off and then on again), contact customer cation Error the inverter.
  • Page 67 5 - Troubleshooting Display Message Causes Solution E013 The alarm is generated only when Make sure the setting of the “IN MODE” switch has Wrong Mode the inverter is configured with been intentionally positioned on “PAR” and that the Wrong Input Mode parallel inputs.
  • Page 68 5 - Troubleshooting Display Message Causes Solution E018 The alarm is generated when, If possible, measure the insulation resistance us- Ground Fault during normal operation of the ing a megohmmeter positioned between the photo- Leakage current fail inverter, a ground leakage cur- voltaic field (positive terminal short-circuited to the rent is detected in the DC sec- negative pole) and ground.
  • Page 69 5 - Troubleshooting Display Message Causes Solution E022 Time taken to execute the au- Error inside the inverter that cannot be checked ex- Self-Test Error 4 totest carried out on the relays of ternally. If the problem persists (after switching the Relay self- test...
  • Page 70 5 - Troubleshooting Display Message Causes Solution E025 Before connecting to the grid, the If possible, measure the insulation resistance us- Riso Low inverter measures the insulation ing a megohmmeter positioned between the pho- insulation resistance of the PV array com- tovoltaic field (positive terminal short-circuited to resistance pared to ground.
  • Page 71 5 - Troubleshooting Display Message Causes Solution E029 Error in the internal measurement Error inside the inverter that cannot be checked Error Meas Z of the insulation resistance of the externally. The error occurs if the internal measure- ZGrid Measures PV array compared to ground ment is carried out before connection to the grid) If Fault...
  • Page 72 5 - Troubleshooting Display Message Causes Solution E035 The inverter has been switched Switch on the inverter remotely. If the unit does Remote Off off remotely (remote OFF) and not switch on, disable the remote on/off function Waiting remote ON remains in waiting state for the and switch the equipment off completely and then signal that will switch it on again...
  • Page 73 5 - Troubleshooting Display Message Causes Solution E056 Excessive temperature mea- Check that the inverter is not exposed to direct Over Temp. (from sured inside the inverter’s wiring sunlight. Wait for the temperatures to which the in- external box) box: verter is exposed to return to the operating range High internal temperature.
  • Page 74 5 - Troubleshooting Display Message Causes Solution W009 Table fail W010 This error appears when there is Error inside the inverter that cannot be resolved Fan Fail malfunctioning of the fan(s) in- with external operations. If the alarm is persistently (Alarm not shown side the inverter.

  • Page 75: Making A Service Call

    5 - Troubleshooting Display Message Causes Solution W019 Overvoltage surge arresters situ- Look at the inspection window present on each SPD AC protection ated on the AC side are dam- surge arrester (AC side). If it is red, the surge ar- open aged.
  • Page 76 5 - Troubleshooting - 76 -...

  • Page 77: Aintenance

    Always use the personal protective equipment provided by the employer and comply with the safety conditions in Part 1 of this manual. ABB accepts no liability if the periodic checks and maintenance cycles indicated in this manual and in the attached documentation are not complied with correctly, or if maintenance is entrusted to unqualified staff.

  • Page 78: Routine Maintenance

    6 - Maintenance outine maintenance Checking and maintenance operations must be carried out by specialized staff assigned to carry out this work. DO NOT allow the equipment to be used if problems of any kind are found, and restore the normal conditions correctly or make sure this is done.

  • Page 79: Installing A Replacement Inverter Chassis

    6 - Maintenance R2032 battery replacement The replacement of the battery should be performed only by trained personnel. The CR2032 battery housing a05 is located on the inverter connection board and is visible after opening the inverter cover. When this battery is at end-of-life, a message is displayed informing that the battery needs to be replaced.

  • Page 80: Removing The Old Inverter Chassis From The Switchbox

    6 - Maintenance emoving the old inverter chassis from the switchbox 1. Remove the switchbox cover by loosening the six captive screws using the Torx screwdriver provided. 2. Using a Phillips head screwdriver, remove the four wires at the top of the DC disconnect switch 06. 3.

  • Page 81: Installing The Replacement Inverter Chassis

    6 - Maintenance 9. Close the inverter cover and tighten the 8 captive screws. 10. Using two people, lift the inverter up by the handles and pull out to remove from the upper slots on the mounting bracket. nstalling the replacement inverter chassis 1.
  • Page 82 6 - Maintenance 6. Pass DC wires and AC wires from inverter main board through the cut-out holes into the switchbox. 7. Pull the AFD wire from the switchbox through cut-out hole to the inverter and connect at main board, as shown below.

  • Page 83: Storage And Dismantling

    ABB CANNOT be held responsible for disposal of the equipment, displays, cables, batteries, etc. The customer must dispose of these substances, which are potentially harmful to the environment, in accordance with the regulations in force in the country of installation.
  • Page 84 6 - Maintenance - 84 -...

  • Page 85: Ppendix

    Appendix ystem description UNO grid-tied inverters provide the capability to supply the utility grid with energy obtained from photovoltaic panels. To use the DC generated by a photovoltaic field efficiently, it must be transformed into alternating current (AC) via a conversion process known as DC-AC inversion. This process is the basis of all grid-tied inverters and is achieved very efficiently by the inverter without the use of rotating elements.

  • Page 86: Protective Devices Within The Inverter

    7 - Appendix Each inverter with multiple strings will work independently of the others and will supply the grid with the maximum power available from its section of photovoltaic panels. Notes on the sizing of the system Decisions about how to structure a photovoltaic system depend on a certain number of factors and considerations to make, such as for example, the type of panels, the availability of space, the future location of the system, energy production goals over the long term, etc.

  • Page 87: Topographic Diagram Of The Equipment

    7 - Appendix opographic diagram of the equipment - 87 -...

  • Page 88: Efficiency Curves

    7 - Appendix fficiency curves The equipment was designed in compliance with energy conservation standards to avoid waste and unnecessary leakage. Graphs of the efficiency curves of the inverters are shown below. The efficiency curves are affected by technical parameters that are continually being developed and improved and should be considered approximate.

  • Page 89: Voltage And Temperature Derating Due To Altitude

    7 - Appendix oltage and temperature derating due to altitude Certain conditions should be considered when choosing an installation location at high altitudes. Air pressure decreases as altitude above sea level increases. The reduced air density results in less effective heat dispersal, hence the need to reduce rated operating temperatures.
  • Page 90 7 - Appendix EXAMPLE – TEMPERATURE DERATING CALCULATION for an UNO-7.6/8.6-TL-US installed at 7500 feet: • The maximum rated temperature, for full power operation at sea level, from the UNO-7.6/8.6-TL-US series datasheet, is 122oF (50oC). • The normalized temperature derating factor, from the graph in Figure 7 3, at an altitude of 7500 feet is .945. •...

  • Page 91: Automatic Power Reduction

    7 - Appendix utomatic power reduction In order to maintain safe inverter operation under adverse environmental conditions or due to improper input voltages, the unit automatically reduces the amount of power it feeds to the grid. The conditions for power reduction due to environmental conditions and input voltage can occur at the same time, but the power reduction will always be determined by the more severe factor.
  • Page 92 7 - Appendix Power reduction due to input voltage The following graphs show the automatic reduction in output power when the input voltage is too high or too low. - 92 -...

  • Page 93: Technical Data And Types

    7 - Appendix echnical data and types Type code UNO-7.6-TL-OUTD-S-US-A UNO-8.6-TL-OUTD-S-US-A Nominal output power 7600W 8600W Maximum output power 8300W 9400W Rated grid AC voltage 208V 240V 277V 240V 277V Input side Number of independent MPPT channels Maximum usable power for each channel...
  • Page 94 For more information on ABB products and services for solar applications, navigate to www.abb.com/solarinverters...
  • Page 95 www.abb.com/solarinverters...

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