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IG Plus 70 V

Fronius IG Plus 30 V, IG Plus 35 V, IG Plus 50 V, IG Plus 70 V, IG Plus100 V Operating Instructions Manual

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Fronius IG Plus 30 V / 35 V / 50 V / 70 V 100 V / 120 V / 150 V
Operating Instructions
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Inverter for grid-connected photo­voltaic systems
42,0426,0062,EA 02/2011
Dear reader,
Introduction Thank you for the trust you have placed in our company an d congratulations on buying this
high-quality Fronius product. These instructions will help you familiarize yourself with the product. Reading the instructions carefully will enable you to learn about the many different features it has to offer. This will allow you to make full use of its advantages.
Please also note the safety rules to ensure greater safety when using the product. Careful handling of the product will repay you with years of safe and reliable operation. These are essential prerequisites for excellent results.
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Contents
Safety rules................................................................................................................................................ 9
Safety Rules Explanation...................................................................................................................... 9
General................................................................................................................................................. 9
Utilization in Accordance with "Intended Purpose" ...............................................................................10
Environmental Conditions........................................... ... ... ... .... ............................................................. 10
Qualified Service Engineers.................................................................................................................. 10
Safety Measures at the Installation Location........................................................................................ 11
Data Regarding Noise Emission Values............................................................................................... 11
EMC device classifications ................................................................................................................... 11
EMC Measures..................................................................................................................................... 11
Grid Connection...... ... ........................................................................................................................... 11
Electrical Installations ....................... ... ... .... ... ... ... ... .............................................................................. 12
Protective Measures against ESD.................... ... ... .... ... ....................................................................... 12
Safety Measures in Normal Operation.................................................................................................. 12
Safety Symbols..................................................................................................................................... 12
Disposal................................................................................................................................................ 12
Backup.................................................................................................................................................. 13
Copyright............................................................................................................................................... 13
General Information 15
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Protection of Persons and Equipment ....................................................................................................... 17
Safety.................................................................................................................................................... 17
Protection of Persons and Equipment .................................................................................................. 17
Galvanic isolation.................................................................................................................................. 17
Monitoring the Grid .............................. ... .... ... ....................................................................................... 17
Warning notices affixed to the device................................................................................................... 17
Warning notice on the wall bracket....................................................................................................... 19
The Fronius IG Plus Unit in the PV System............................................................................................... 20
General................................................................................................................................................. 20
Tasks .................................................................................................................................................... 20
Converting DC to AC Current ............................................................................................................... 20
Fully Automatic Operational Management............................................................................................ 20
Display function and data communication ............................................................................................ 20
System Upgrade................................................................................................................................... 20
Forced Ventilation................................................................................................................................. 21
100 kohm Grounding Kit Option............................................................................................................ 21
Power derating...................................................................................................................................... 21
Installation and Startup 23
Fronius IG Plus Installation and Connection.............................................................................................. 25
Fronius IG Plus Construction................................................................................................................ 25
Overview............................................................................................................................................... 25
Choosing the Location ............................................................................................................................... 26
Choosing the Location, General .................................... ... ... .... ... ... ... .... ................................................ 26
Choosing a Location for Inside Installation........................................................................................... 26
Choosing a location for outdoor installation... ... ... ... .... .......................................................................... 27
Fronius IG Plus Connection Options.......................................................................................................... 28
Fronius IG Plus connection options.............................................................................................
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nockouts on the Fronius IG Plus ............................................................................................................. 30
General................................................................................................................................................. 30
Knockouts on the Fronius IG Plus for wire inputs................................................................................. 30
Removing Knockouts. ........................................................................................................................... 30
......... 28
Fronius IG Plus Installation........................................................................................................................ 31
Attaching the wall bracket..................................................................................................................... 31
Lifting the Fronius IG Plus..................................................................................................................... 31
Fronius IG Plus installation ................................................................................................................... 32
Connecting the Fronius IG Plus to the Public Grid (AC)............................................................................ 34
Monitoring the Grid .............................. ... .... ... ....................................................................................... 34
Installations with Several Inverters ....................................................................................................... 34
AC-Side Terminals................................................................................................................................ 34
Grid Neutral Conductor........ ... .............................................................................................................. 35
Connecting Aluminum Cables............................................................................................................... 35
Cross Section of AC Wires ................................................................................................................... 35
Safety.................................................................................................................................................... 35
Connecting the Fronius IG Plus to the public grid (AC) ........................................................................ 35
Maximum AC-side overcurrent protection............................................................................................. 36
Connecting Solar Module Strings to the Fronius IG Plus (DC)..................... ... .......................................... 37
General Information about Solar Modules............................................................................................ 37
Safety.................................................................................................................................................... 37
DC-Side Terminals................................................................................................................................ 38
Connecting aluminum cables (DC)................... .................................................................................... 38
Polarity Reversal of Solar Module Strings ............................................................................................ 38
Overview............................................................................................................................................... 39
Ungrounded System: Connecting Solar Module Strings............................................................................ 40
Wire Cross Section of Solar Module Strings..................................... .... ... ... ...... .... ... ... ... .... ... ... ... ... ... .... 40
Ungrounded system: Connecting solar module strings ........................................................................ 40
Selecting String Fuses.......................................................................................................................... 42
Inserting String Fuses.......... ................................................................................................................. 43
Criteria for the Proper Selection of String Fuses ....................................................................................... 44
General................................................................................................................................................. 44
Criteria for the Proper Selection of String Fuses .................................................................................. 44
Effects of Using Underrated Fuses....................................................................................................... 44
Fuse Recommendations....................................................................................................................... 44
Application Example ................................... ... ... ... ................................................................................. 44
Fuses.................................................................................................................................................... 45
Ungrounded System: Connecting Solar Module Strings with a Cable Cross Section > 16 mm² .. ... ... .... ... 46
General................................................................................................................................................. 46
Additional components required ........................................................................................................... 46
Ungrounded system: Connecting solar module strings with a cable cross section > 16 mm² .............. 46
Solar Module Ground at Negative Pole: Connecting Solar Module Strings............................................... 50
General................................................................................................................................................. 50
Wire Cross Section of Solar Module Strings..................................... .... ... ... ...... .... ... ... ... .... ... ... ... ... ... .... 50
Solar module ground at negative pole: Connecting solar module strings............................................. 50
Selecting String Fuses.......................................................................................................................... 52
Inserting String Fuses.......... ...............................................................................................
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riteria for the Proper Selection of String Fuses ....................................................................................... 54
General................................................................................................................................................. 54
Criteria for the Proper Selection of String Fuses .................................................................................. 54
Effects of Using Underrated Fuses....................................................................................................... 54
Fuse Recommendations....................................................................................................................... 54
Application Example ................................... ... ... ... ................................................................................. 54
Fuses.................................................................................................................................................... 55
Solar Module Ground at Negative Pole: Connecting Solar Module Strings with a Cable Cross Section >
16 mm².......................................................................................................................................................
General................................................................................................................................................. 56
Additional components required ........................................................................................................... 56
Solar module ground at negative pole: Connecting solar module strings with a cable cross section >
16 mm²..................................................................................................................................................
Solar Module Ground at Negative Pole for Fronius IG Plus ...................................................................... 60
.................. 53
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General................................................................................................................................................. 60
Solar Module Ground at Negative Pole ................................................................................................ 60
Solar Module Ground at Negative Pole for Fronius IG Plus ................................................................. 60
Safety.................................................................................................................................................... 61
Setting inverters for grounded solar modules....................................................................................... 61
Solar Module Ground: Inserting Fuse or "100 kohm Grounding Kit" Option......................................... 61
Opening Fronius IG Plus for Service/Maintenance............................................................................... 62
Solar Module Ground at Positive Pole: Connecting Solar Module Strings ................................ ... ... ... ....... 63
General................................................................................................................................................. 63
Wire Cross Section of Solar Module Strings..................................... .... ... ... ...... .... ... ... ... .... ... ... ... ... ... .... 63
Solar module ground at positive pole: Connecting solar module strings .............................................. 63
Selecting String Fuses.......................................................................................................................... 66
Inserting String Fuses.......... ................................................................................................................. 66
Criteria for the Proper Selection of String Fuses ....................................................................................... 68
General................................................................................................................................................. 68
Criteria for the Proper Selection of String Fuses .................................................................................. 68
Effects of Using Underrated Fuses....................................................................................................... 68
Fuse Recommendations....................................................................................................................... 68
Application Example ................................... ... ... ... ................................................................................. 68
Fuses.................................................................................................................................................... 69
Solar Module Ground at Positive Pole: Connecting Solar Module Strings with a Cable Cro ss Section > 16
mm²............................................................................................................................................................
General................................................................................................................................................. 70
Additional components required ........................................................................................................... 70
Solar module ground at positive pole: Connecting solar module str ings with a cable cross section > 16
mm².......................................................................................................................................................
Solar Module Ground at Positive Pole for Fronius IG Plus........................................................................75
General................................................................................................................................................. 75
Solar Module Ground at Positive Pole.................................................................................................. 75
Solar Module Ground at Positive Pole for Fronius IG Plus................................................................... 75
Safety.................................................................................................................................................... 76
Setting inverters for grounded solar modules....................................................................................... 76
Solar Module Ground: Inserting Fuse or "100 kohm Grounding Kit" Option......................................... 76
Opening Fronius IG Plus for Service/Maintenance............................................................................... 77
Closing Fronius IG Plus ............................................................................................................................. 78
Closing Fronius IG Plus........................................................................................................................ 78
Inserting Option Cards................................. .... ... ... ... ... .... .......................................................................... 79
Suitable Option Cards.................................... ... ... ... .... ... ... ... ................................................................. 79
Safety.................................................................................................................................................... 79
Inserting option cards into the Fronius IG Plus..................................................................................... 79
Closing Fronius IG Plus........................................................................................................................ 80
Data Communication and Solar Net .......................................................................................................... 81
Solar Net and Data Interface ................................................................................................................ 81
Example........................................................................................................................
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ommissioning .......................................................................................................................................... 83
Factory Configuration............................................................................................................................ 83
Start-up operation................................................................................................................................. 83
Setting Inverters for Available Solar Module Ground........................ .... ... ... ... ... .... ................................ 83
........................ 81
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Operation 87
Product Description Fronius IG Plus.......................................................................................................... 89
Controls and Indicators......................................................................................................................... 89
Display.................................................................................................................................................. 89
Operating Status LED........................................................................................................................... 91
Startup Phase and Grid Feed-in Mode.................. .................................................................................... 92
Startup phase........................................................................................................................................ 92
Test Procedure ..................................................................................................................................... 92
Operation of Feeding Energy into the Grid........................................................................................... 93
Navigation in the Menu Level.............. ... ... ... .... ... ... ... ................................................................................. 94
Activating display illumination ............................................................................................................... 94
Automatic switch to the "Now" display mode or the startup phase....................................................... 94
Accessing the Menu Level.................................................................................................................... 94
The Display Modes................ ... ... ... ........................................................................................................... 96
The Display Modes............................................................................................................................... 96
Selecting a Display Mode ..................................................................................................................... 96
Overview of Display Values.................................................................................................................. 96
Display Values in "Now" Display Mode...................................................................................................... 98
Selecting the "Now" Display Mode........................................................................................................ 98
Display values in the "Now" display mode............................................................................................ 98
Options.................................................................................................................................................. 100
Display Values in "Day / Year / Total" Display Modes ............................................................................... 101
General................................................................................................................................................. 101
Selecting "Day / Year / Total" Display Mode......................................................................................... 101
Display values in the 'Day / Year / Total' display modes....................................................................... 102
Options.................................................................................................................................................. 104
The Setup Menu ....................... ... ... .... ....................................................................................................... 105
Presetting.............................................................................................................................................. 105
Accessing the Setup Menu................................................................................................................... 105
Scrolling through Menu Items........................... ...... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ...... .... ... ... ............. 106
Menu Items in the Setup Menu.................................................................................................................. 107
STANDBY............................................................................................................................................. 107
CONTRAST.......................................................................................................................................... 107
LIGHT MODE.................... ... ... ... .... ... ... ................................................................................................. 108
CASH.................................................................................................................................................... 108
CO2....................................................................................................................................................... 108
YIELD.................................................................................................................................................... 108
IG no..................................................................................................................................................... 109
DAT COM ............................................................................................................................................. 109
TIME ..................................................................................................................................................... 110
LIMIT CFG.............. ... ... .... .................................................................................................................... 110
STATE PS............................................................................................................................................. 113
VERSION.............................................................................................................................................. 113
Setting and Displaying Menu Items ........................................................................................................... 114
Setting Menu Items - General............................................................................................................... 114
Examples of Setting and Displaying Menu Items.................................................................................. 114
Setting the Currency and Charge Rate................................................................................................. 114
Displaying and Setting Parameters in the "DATCOM" Menu Item........................................................ 116
Setting Time and Date ......................................................................................................................... 119
Setup Lock function ................................................................................................................................... 122
General................................................................................................................................................. 122
Activating/deactivating the "Setup Lock" function................................................................................. 122
Troubleshooting and Maintenance 125
Status Diagnosis and Troubleshooting .. ... ... .... .......................................................................................... 127
Displaying Status Codes....................................................................................................................... 127
Normal Operation Status Codes..................................................................................................
Total Failure
Status Codes on Fronius IG Plus with Several Power Stage Sets ....... ... ... ... ... .... ................................ 127
Class 1 Status Codes ........................................................................................................................... 128
Class 3 status codes............................................................................................................................. 130
Class 4 status codes............................................................................................................................. 132
Class 5 status codes............................................................................................................................. 138
.......................................................................................................................................... 127
......... 127
Customer Service ................................................................................................................................. 142
Maintenance .............................................................................................................................................. 143
Safety.................................................................................................................................................... 143
Operation in Dusty Environments......................................................................................................... 143
Opening Fronius IG Plus for Service/Maintenance............................................................................... 143
Replacing String Fuses.............................................................................................................................. 145
Safety.................................................................................................................................................... 145
Preparation ........................................................................................................................................... 145
Replacing Fuses..................... ... .... ... .................................................................................................... 146
Finally.................................................................................................................................................... 147
Appendix 149
Technical Data.................................... ... ... ... .... ... ... .................................................................................... 151
Fronius IG Plus 30 V............................................................................................................................. 151
Fronius IG Plus 35 V............................................................................................................................. 152
Fronius IG Plus 50 V............................................................................................................................. 153
Fronius IG Plus 70 V............................................................................................................................. 154
Fronius IG Plus 100 V........................................................................................................................... 155
Fronius IG Plus 120 V........................................................................................................................... 156
Fronius IG Plus 150 V........................................................................................................................... 157
Explanation of footnotes ....................................................................................................................... 157
Relevant Standards and Directives........... ... .... .......................................................................................... 158
CE Conformity Marking......................................................................................................................... 158
Parallel Operation of In-Plant Power Generation Systems................................................................... 158
Circuit to Prevent Islanding................................................................................................................... 158
Grid Failure....................... ... ... ... .... ... ... ................................................................................................. 158
Warranty and Disposal............................................................................................................................... 159
Fronius Manufacturer's Warranty.......................................................................................................... 159
Extended warranty..... ... .... ... ... ... .... ... .................................................................................................... 159
Services within the Warranty Period. ... ................................................................................................. 159
Transport............................................................................................................................................... 159
When making a warranty claim, attention should be paid to the following............................................ 159
Scope and Validity of Manufacturer's Warranty.................................................................................... 160
Exceptions to the Fronius manufacturer's warranty.............................................................................. 160
Geographical Validity.............................................. .... ... ... .................................................................... 160
Other Legal Information.................... .................................................................................................... 160
Disposal................................................................................................................................................ 161
.............................................................................................................................................................. 163
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Safety rules
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Safety Rules Ex­planation
General
DANGER! Indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
WARNING! Indicates a potentially hazardous situation which, if not avoided, will result in death or serious injury.
CAUTION! Indicates a potentially harmful situation which, if not avoided, may re­sult in minor and moderate injury or property damage.
NOTE! Indicates a risk of flawed results and possible damage to the equipment.
IMPORTANT! Indicates tips for correct operation and other particularly useful information.
It does not indicate a potentially damaging or dangerous situation. If you see any of the symbols depicted in the "Safety rules," special care is required.
The device is manufactured using state-of-the-art technology and according to recognized safety standards. If used incorrectly or misused, however, it can cause
- injury or death to the operator or a third party,
- damage to the device and other material assets belonging to the operator,
- inefficient operation of the device
All persons involved in commissioning, maintaining and servicing the device must
- be suitably qualified,
- have knowledge of and experience in dealing with electrical in stallations and
- read and follow these operating instructions carefully
The operating instructions must always be at hand wherever the device is be­ing used. In addition to the operating instructions, attention must also be paid to any generally applicable and local regulations regarding accident preven­tion and environmental protection.
All safety and danger notices on the device
- must be kept in a legible state
- must not be damaged/marked
- must not be removed
- must not be covered, pasted or painted over
For the location of the safety and danger notices on the device, refer to the section headed "General" in the operating instructions for the device.
Before switching on the device, remove any faults that could compromise safety.
Your personal safety is at stake!
Utilization in Ac­cordance with "Intended Pur­pose"
Environmental Conditions
The device is to be used exclusively for its intended purpose. Utilization for any other purpose, or in any other manner, shall be deemed to
be "not in accordance with the intended purpose." The manu facturer shall not be liable for any damage resulting from such improper use.
Utilization in accordance with the "intended purpose" also includes
- carefully reading and obeying all the instructions and all the safety and danger notices in the operating instructions
- performing all stipulated inspection and servicing work
- installation as specified in the operating instructions
The following guidelines should also be applied where relevant:
- Regulations of the utility regarding energy fed into the grid
- Instructions from the solar module manufacturer
Operation or storage of the device outside the stipulated area will be deemed as "not in accordance with the intended purpose." The manufacturer is not re­sponsible for any damages resulting from unintended use.
Qualified Service Engineers
For exact information on permitted environmental conditions, please refer to the "Technical data" in the operating instructions.
The servicing information contained in these operating instructions is intended only for the use of qualified service engineers. An electric shock can be fatal. Do not perform any actions other than those de scribed in the docum entation. This also applies to those who may be qualified.
All cables and leads must be secured, undamaged, insulated a nd adequately dimensioned. Loose connections, scorched, damaged or inadequately dime n­sioned cables and leads must be immediately repaired by authorized person­nel.
Maintenance and repair work must only be car ried ou t by au th or ize d pe rs on ­nel.
It is impossible to guarantee that externally procured parts are designed and manufactured to meet the demands made on them, or that they satisfy safety requirements. Use only original replacement parts (also applies to standard parts).
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Do not carry out any modifications, alterations, etc. without the manufacturer's consent.
Components that are not in perfect condition must be changed immediately.
Safety Measures at the Installation Location
When installing devices with openings for cooling air, ensure that the cooling air can enter and exit unhindered through the vents. Only operate the device in accordance with the de­gree of protection shown on the rating plate.
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Data Regarding Noise Emission Values
EMC device clas­sifications
The inverter generates a maximum sound power level of < 80 dB(A) (ref. 1 pW) when operating under full load in accordance with IEC 62109-1.
The device is cooled as quietly as possible with the aid of an electronic tem­perature control system, and depends on the amount of converted power, the ambient temperature, the level of soiling of the device, etc.
It is not possible to provide a workplace-related emission value for this device, because the actual sound pressure level is heavily influenced by the installa­tion situation, the power quality, the surrounding walls and the properties of the room in general.
Devices with emission class A:
- are only designed for use in an industrial setting
- can cause line-bound and radiated interference in other areas
Devices with emission class B:
- satisfy the emissions criteria for residential and industrial areas. This is also true for residential areas in which the energy is supplied from the public low voltage grid.
EMC Measures
Grid Connection
EMC device classification as per the rating plate or technical data.
In certain cases, even though a device co mplies with the standard limit value s for emissions, it may affect the application area for which it was designed (e.g., when there is sensitive equipment at the same location, or if the site where the device is installed is close to either radio or television receivers). If this is the case, then the operator is obliged to take appropriate action to rectify the situ­ation.
High-performance devices (> 16 A) can affect the voltage quality of the grid because of a high output current in the main supp ly.
This may affect a number of types of device in terms of:
- connection restrictions
- criteria with regard to maximum permiss ible mains im pe da n ce *)
- criteria with regard to minimum short-circuit power requirement *)
*) at the interface with the public grid see Technical Data
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In this case, the operator or the pers on using the device should check whether or not the device is allowed to be connected, where appropriate through dis­cussion with the power supply company.
Electrical Installa­tions
Protective Mea­sures against ESD
Safety Measures in Normal Opera­tion
Electrical installations must only be carried out according to relevant nation al and local standards and regulations.
Danger of damage to electrical components from electrical discharge. Suitab le measures should be taken to protect against ESD when replacing and install­ing components.
Only operate the device when all protection devices are fully functional. If the protection devices are not fully functional, there is a risk of
- injury or death to the operator or a third party,
- damage to the device and other material assets belonging to the operator,
- inefficient operation of the device
Safety Symbols
Disposal
Any safety devices that are not functioning properly must be repaired by au­thorized personnel before the device is switched on.
Never bypass or disable protection devices.
Devices with the CE mark ing satisfy the essential requirements of the low-volt­age and electromagnetic compatibility directives. Further details can be found in the appendix or the chapter entitled "Technical data" in your documenta tion.
Do not dispose of this device with normal domestic waste! To comply with the European Directive 2002/96/EC on Waste Electrical and Electronic Equip­ment and its implementation as national law, electrical equipment that has reached the end of its life must be collected separately and returned to an ap­proved recycling facility. Any device that you no longer require must be re­turned to your dealer, or you must locate the approved collection and recycling facilities in your area. Ignoring this European Directive may have potentially adverse affects on the environment and your health!
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Backup
The user is responsible for backing up any changes made to the factory set­tings. The manufacturer accepts no liability for any deleted personal settings.
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Copyright
Copyright of these operating instructions remains with the manufacturer. Text and illustrations are technically correct at the time of going to print. The
right to make modifications is reserved. The contents of the operating instruc­tions shall not provide the basis for any claims whatsoever on the part of the purchaser. If you have any suggestions for improvement, or can point out any mistakes that you have found in the operating instructions, we will be most grateful for your comments.
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General Information
Protection of Persons and Equipment
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Safety
Protection of Per­sons and Equip­ment
Galvanic isolation The inverter is equipped with a high frequency transformer that ensur es galvanic isolation
The design and function of the inverter offer a maximum level of safety, both during instal­lation as well as operation.
The inverter provides operator and equipment protection through: a) galvanic isolation b) monitoring the grid
between the DC side and the grid, thus ensuring the highest possible safety.
WARNING! If the equipment is used or tasks are carried out incorrectly, se rious injury or damage may result. Only qualified personnel are authorized to install your inverter and only within the scope of the respective technical regulations. It is essential that you read the "Safety regulations" chapter before commissioning the equipment or carrying out maintenance work.
Monitoring the Grid
Warning notices affixed to the de­vice
Whenever conditions in the electric grid are inconsistent with standard conditions (for ex­ample, grid switch-off, interruption), the inverter will immediately stop operating and inter­rupt the supply of power into the grid.
Grid monitoring is carried out using:
- Voltage monitoring
- Frequency monitoring
- Monitoring islanding conditions
The inverter contains warning notices and safety symbols. These warning notices and safety symbols must NOT be removed or painted over. The notices and symbols warn against operating the equipment incorrectly, as this may result in serious injury and dam­age.
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Safety symbols:
Risk of serious injury and damage due to incorrect operation
Do not use the functions described until you have thoroughly read and under­stood the following documents:
- these operating instructions
- all operating instructions for system components of the photovoltaic sys­tem, especially the safety rules
Dangerous electrical voltages
Text of warning notices:
WARNING!
The connection area should only be opened by a licensed electrician. The separate power stage set area should only be disconnected from the connection area after first being dis­connected from the grid power. The separ ate power stage set area sh ould only be opened by trained service personnel. You must wait until the capacitors have discharged. Discharge takes 5 minutes. The neu­tral conductor of the grid must be grounded. Solar mo dules exposed to light create danger­ous voltage. Activate the DC disconnect and disengage the module ground, if available, before working on the solar modules.
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Warning notice on the wall brack­et
The wall bracket contains a warning notice regarding the installation of sever al inverters next to each other. This warning notice must not be removed or painted over. It warns against incorrect installation, which could result in property damage.
The spacing information listed in the warning notice from the wall/ceiling to the inverter and from inverter to inverter must be observed when installing several inverters next to each other.
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The Fronius IG Plus Unit in the PV System
General The solar inverter is the highly complex link between the solar modules and the public grid.
Tasks The main tasks of the inverter include:
- Converting DC to AC current
- Fully automatic operational management
- Display function and data communica tion
Converting DC to AC Current
Fully Automatic Operational Man­agement
The inverter transforms the direct current g ene rate d by the sola r mo dules into alter na ting current. This alternating current is fed into your home system or into the public grid and synchronized with the voltage that is used there.
IMPORTANT! The inverter has be en de sig ne d ex clusively for use in grid-connected pho­tovoltaic systems. It cannot generate electric power independently of the grid.
The inverter is fully automatic. Starting at sunrise, as soon as the solar modules ge nerate enough power, the automatic control unit starts monitoring voltage and frequency. After five minutes, if there is a sufficient level of irradiance, your solar inverter starts feedin g en­ergy to the grid.
The inverter control system ensures that the maximum possible power output is drawn from the solar modules at all times. This function is called MPPT (Maximum Power Point Tracking).
As dusk starts and there is no longer sufficient energy available to feed power into the grid, the inverter unit shuts down the grid connection completely and stops operating. All set­tings and recorded data are saved.
Display function and data commu­nication
System Upgrade The inverter is designed for various system upgrades, e.g.:
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The display on the inverter is the interface between the inverter and the oper ator . Th e de­sign of the display is geared towards simple operation and making system data available as long as the inverter operates.
The inverter is equipped with a basic logging function to monitor minimum and maximum data on a daily and a cumulative basis. These values are shown on the display.
A wide range of data communication products allows for many possibilities of recording and viewing data.
- Upgrades that enable the inverter to communicate with externa l syste m u pgrad es a s well as with other inverters
- Datalogger (when using a PC to record and manage data from your photovoltaic sys­tem), includes Datalogger and a modem interface
- Various large-format displays
- Fronius Personal Display
- Actuators (e.g.: relays, alarms)
- Interface cards
System upgrades are available as plug-in cards.
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Forced Ventila­tion
100 kohm Grounding Kit Option
Power derating Should there be insufficient heat dissipation in spite of the fan operating at maximum spee d
The inverter's temperature-controlled, variable-speed fan with ball-bearing support pro­vides:
- optimal inverter cooling
- efficiency increases
- cooler components, thus improving service life
- least possible energy consumption and lowest possible noise level
- weight reduction due to a reduction of the cooling element surface
Along with the solar module ground on the positive or negative pole, solar modules can also be grounded with high resistance on the positive or negative pole.
This requires the 100 kohm Grounding Kit option, which is insert­ed into the corresponding fuse holder similar to a regular fuse for the solar module ground.
(for example, inadequate heat transfer away from the heat sinks), the power will be derated to protect the inverter when the ambient temperature reaches approx. 40 °C and above.
Grounding Kit 100 kOhm
Derating the power reduces the output of the inverter for a short period sufficient to ensure that the temperature will not exceed the permissible limit. Your inverter will remain ready for operation as long as possible without any interruption.
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Installation and Startup
Fronius IG Plus Installation and Connection
(1)
(2)
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Fronius IG Plus Construction
Overview ‘Fronius IG Plus Installation and Connection’ contains the following sections:
- Choosing the Location
- Fronius IG Plus Connection Options
- Knockouts on the Fronius IG Plus
- Fronius IG Plus Installation
- Connecting the Fronius IG Plus to the Public Grid (AC)
- Connecting Solar Module Strings to the Fronius IG Plus (DC)
- Closing Fronius IG Plus
The power stage set and the connection area are separated from each other for de­livery.
(1) Power stage set(s)
(2) Connection area
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Choosing the Location
50 mm
300 mm
200 mm
Choosing the Lo­cation, General
Please note the following criteria when choosing a location for the inverter:
It should only be installed on a stable, vertical wall Max. ambient temperatures: -20 °C / +55 °C Relative humidity: 0 - 95 % For use at altitudes above sea level: up to 2000 m
- There should be a 200 mm (7.8 in) clearance on bo th sides of the inverter for the cool air vents.
- Maintain a side distance of 300 mm (11.8 in) between individual inverters.
Choosing a Loca­tion for Inside In­stallation
The air flow direction within the inverter is from right to left (cold air in take on right, hot air exit on left).
When installing the inverter in a switch panel cabinet (or similar closed environment), it is necessary to make sure that the hot air that develops will be discharged by forced venti­lation.
The inverter is designed for installation both indoors and outdoors.
During certain operation phases the inverter may p roduce a slight n oise. For this re ason it should not be installed in an occupied living area.
Do not install the inverter in:
- areas with large amounts of dust
- areas with large amounts of conducting dust particles (e.g., iron filings)
- areas with corrosive gases, acids or salts
- areas where there is an increased risk o f accidents, e.g., from farm animals ( horses, cattle, sheep, pigs, etc.)
- stables or adjoining areas
- storage areas for hay, straw, chaff, animal feed, fertilizers, etc.
- storage or processing areas for fruit, vegetables or winegrowing products
- areas used in the preparation of grain, green fodder or animal feeds
- greenhouses
26
Choosing a loca­tion for outdoor installation
Because of its degree of protection, the invert er is not susceptible to splash water from any direction.
g
However the manufacturer recommends, if possible, not to expose the inverter to direct weathering, in order to prevent water deposits caused by rain or snow.
In order to protect the display, the inverter should not be exposed to direct sunlight. Ide­ally, the inverter should be installed in a protected location, e.g., near the solar modules or under a roof overhang.
Do not install the inverter:
- where it can be exposed to ammonia, corrosive gasses, acids or salts (e.g., fertilizer storage areas, vent openings of livestock stables, chemical plants, tanneries)
27
Fronius IG Plus Connection Options
Fronius IG Plus connection op­tions
28
Item Description
(1) Fuse cover (6 x for string fuses, 1 x for the solar module ground fuse) (2) Jumper slot SMON (3) DC+ main switch wire (4) 6 DC+ fuse holders (5) Jumper slot SMOFF (6) DC- main switch wire (7) Plug-in card for country setup (IG Brain) (8) Open card slot for an option card (9) Open card slot for a second option card (10) Open card slot for a third option card (11) Fuse holder for solar module ground (12) Strain relief for plug-in card cable (13) AC-side terminals (14) Metric screw joint M32 or M40 (AC connection) (15) 6 DC- terminals
Item Description
(16) Strain relief for solar module strings (17) 6 DC+ terminals (18) DC main switch
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29
Knockouts on the Fronius IG Plus
(1)
(2)
(3)
General The inverter contains several knockouts of different sizes. When knocked out, the open-
ings are used for the inputs of various wires.
Knockouts on the Fronius IG Plus for wire inputs
Removing Knock­outs
Item Description (1) 2 cable inputs for M32 metric screw joint
(for DC cables with a cross section > 16 mm²)
(2) 12 cables inputs for 6 solar module strings DC
(for a cable diameter of 5 - 9.2 mm)
(3) Sealing insert (cable input for plug-in card wire)
The knockouts made from plastic as well as th e larger ones m ade from m etal should only be removed from the outside in.
The smaller knockouts made from metal should be removed from the inside ou t. You should only remove the number of knockouts required for the available cables (e.g., 6
openings for 3 module strings). The plastic knockouts are also equipped with centering holes so that they can be drilled
out if required.
30
Fronius IG Plus Installation
"click"
min. 50 mm min. 2 in.
2
1
1
7
3
5
4
6
(*)
2
2
6 x
4
6
7
1
5
23
g
Attaching the wall bracket
IMPORTANT! Depending on the surface, different dowels and screws may be required for
installing the wall bracket. Therefore, these dowels and screws are not part of the scope of supply for the inverter. The system installer is responsible for selecting the proper dowels and screws.
NOTE! The Fronius IG Plus should only be installed upright on the wall.
1
"click"
1
1
Lifting the Fro­nius IG Plus
IMPORTANT! Attach the wall bracket so that the display marking (*) on the wall bracket is
at eye level.
3
1
22
3
5
Fronius recommends using a commercially-available vacuum lifting pad for fla t surfaces to lift the connection area and power stage set.
IMPORTANT
4
6
4
31
- The vacuum lifting pads must be designed for the weight of the connection area and
1
2
power stage set.
- Follow all safety instructions from the vacuum lifting pad manufacturer.
- Vacuum lifting pads are not part of the scope of delivery for the inverter. Weight information for the connection area and power stage set:
Inverter Connection area Power stage set
Fronius IG Plus 30 V-1 9,85 kg 13,95 kg Fronius IG Plus 35 V-1 9,85 kg 13,95 kg Fronius IG Plus 50 V-1 9,85 kg 13,95 kg Fronius IG Plus 70 V-1 9,85 kg 26,10 kg Fronius IG Plus 70 V-2 9,85 kg 26,10 kg Fronius IG Plus 100 V-1 10,80 kg 26,10 kg Fronius IG Plus 100 V-2 10,85 kg 26,10 kg Fronius IG Plus 120 V-3 11,05 kg 38,15 kg Fronius IG Plus 150 V-3 11,05 kg 38,15 kg
Fronius IG Plus installation
NOTE! For inverter assembly, plea s e ensu re tha t:
- the wall bracket is fixed securely to the wall
- the connector is hung and fixed to the wall bracket
- the power stage set is hung on the wall bracket and fixed to the connector
1
A
2
1
B
2
32
3
3
3
1
2
3
2
1
2
3
A
B
7
4
g
3
1
4
5
1
2
6
Use the screws in the bag attached to the wall bracket to secure the power stage set to the connection area.
1
1
2
1
3
33
Connecting the Fronius IG Plus to the Public Grid
(a) (c)(b)
(AC)
Monitoring the Grid
Installations with Several Inverters
AC-Side Termi­nals
IMPORTANT! The resistance in the leads to the AC-side connection terminals must be as
low as possible for optimal functioning of grid monitoring.
For larger photovoltaic systems, it is possible to connect several inverters in parallel with­out any problems. To ensure symmetrical feeding, connect the inverters unifo rml y to a ll 3 phases.
One-Phase Inverters Two-Phase Inverters
(a)
(b)
Three-Phase Inverters Legend:
(c)
(a)
L1 Phase conductor L2 Phase conductor L3 Phase conductor PE PE conductor *) N Neutral conductor (a) Grounding electrode terminal *) (b) Terminal for possible grounding of
(c) "US Sense" terminal (for USA) *) max. cable cross section 25 mm²
*) IMPORTANT: Only one PE con-
(b)
the solar module frame
ductor terminal is available on the Fronius IG Plus 100V-2.
(c)
34
Grid Neutral Con­ductor
NOTE! Make sure that the grid neutral conductor is grounded.
g
Connecting Alu­minum Cables
Cross Section of AC Wires
Safety
NOTE! The AC side terminals are not designed for connecting aluminum cables.
For M32 metric screw joint: Cable diameter 11 - 21 mm
For M40 metric screw joint: Cable diameter 19 - 28 mm
If required, use reducers for smaller cable diameters.
WARNING! An electric shock can be fatal. Danger due to grid voltage and DC voltage from solar modules.
- The connection area should only be opened by a licensed electrician.
- The separate power stage set area should only be disconnected from the connection area after first being disconnected from the grid power.
- The separate power stage set area should only be opened by Froniu s-trained service personnel.
Connecting the Fronius IG Plus to the public grid (AC)
Never work with live wires! Prior to all connection work, make sure that the AC and DC wires are not charged.
CAUTION! Danger of damaging the inverter by overloading the grid neutral con­ductor.
- Do not connect 2-phase and 3-phase devices together to one phase
- Never operate multi-phase devices in one phase
CAUTION! Danger of damaging the inverter from improperly connected termi­nals. Improperly connected terminals can cause thermal damage to the inverter and may cause a fire. When connecting the AC and DC cables, make sure that all terminals are tightened securely using the proper torque.
Only an authorized electrician is permitted to connect this inverter to the public grid.
NOTE! Finely stranded cables up to conductor class 5 can be connected to the AC-side terminals without wire end ferrules.
35
1
2
3
4
6
5
1
7
1
on off
2
OFF
Maximum AC­side overcurrent protection
10 mm
20 mm
2
AC
Terminal tightening torque: 2 Nm
Inverter Number of
Nominal output Fuse protection
phases
Fronius IG Plus 30 V-1 1 3 kW 1 x C 20 A Fronius IG Plus 35 V-1 1 3,5 kW 1 x C 20 A Fronius IG Plus 50 V-1 1 4 kW 1 x C 25 A Fronius IG Plus 70 V-1 1 6,5 kW 1 x C 40 A Fronius IG Plus 70 V-2 2 6,5 kW 2 x C 20 A Fronius IG Plus 100 V-1 1 8 kW 1 x C 50 A Fronius IG Plus 100 V-2 2 8 kW 2 x C 25 A Fronius IG Plus 120 V-3 3 10 kW 3 x C 20 A Fronius IG Plus 150 V-3 3 12 kW 3 x C 25 A
NOTE! A residual current circuit breaker for the AC connecting cable may be re­quired depending on local regulations, the power supply company as well as oth­er conditions. A type A residual current circuit breaker is generally sufficient in this case. However, false alarms can be triggered for the residual current circuit breaker in individual cases and depending on local conditions. For this reason, Fronius recommends that you use a residual current circuit breaker suitable for a frequency converter.
NOTE! Three-phase inverters only: When using a residual current circuit breaker, the voltage difference between the PE grounding conductor and the N neutral conductor cannot be higher than 8 V.
36
Connecting Solar Module Strings to the Fronius IG Plus (DC)
General Informa­tion about Solar Modules
Safety
g
In order to select suitable solar modules and get the most efficient use out of the inverter, please note the following points:
- If irradiance is constant and the temperature is falling, the open circuit voltage of the solar modules will increase. Open circuit voltage may not exceed 600 V.
Whenever the open circuit voltage of the solar modules exceeds 600 volts, the inverter may be damaged, and all warranty rights will become null and void.
- More exact values for dimensioning solar modules for the chosen installation location can be provided using suitable calculation programs like the Fronius Solar.configura­tor (available at http.//www.fronius.com).
NOTE! Before connecting solar modules:
- make sure that the voltage specified by the manufacturer corresponds to the actual measured voltage
- determine whether or not a solar module ground is required
WARNING! An electric shock can be fatal. Danger due to grid voltage and DC voltage from solar modules.
- The connection area should only be opened by a licensed electrician.
- The separate power stage set area should only be disconnected from the connection area after first being disconnected from the grid power.
- The separate power stage set area should only be opened by Froniu s-trained service personnel.
Never work with live wires! Prior to all connection work, make sure that the AC and DC wires are not charged.
The DC main switch is only used to switch off power to the power stage set. When the DC main switch is turned off, the connection area is still energized.
CAUTION! Danger of damaging the inverter from improperly connected termi­nals. Improperly connected terminals can cause thermal damage to the inverter and may cause a fire. When connecting the AC and DC cables, make sure that all terminals are tightened securely using the proper torque.
37
DC-Side Termi­nals
DC+ DC-
Connecting alu­minum cables (DC)
The DC-side terminals are designed for connecting single-wire, round aluminum cables. The following points must be taken into account when connecting aluminum cables due to the non-conducting oxide layer of aluminum:
- The reduced rated currents for aluminum cables
- The connection requirements listed below
Reduced rated currents for aluminum cables:
Rated cross section Reduced rated current
2.5 mm² 20 A 4 mm² 27 A 6 mm² 35 A
10 mm² 48 A 16 mm² 64 A
NOTE! Take into account local specifications when configuring cable cross sec­tions.
Connection requirements:
Carefully clean off the oxide layer of the stripped cable end, e.g., using a knife.
1
Polarity Reversal of Solar Module Strings
38
IMPORTANT! Do not use brushes, files or sandpaper. Aluminum particles may get stuck and can transfer to other cables.
After removing the oxide layer of the cable end, rub in a neutral grease, e.g., acid- and
2
alkali-free Vaseline. Then immediately connect to the terminal.
3
Repeat the steps above whenever the cable is disconnected and then reconnected.
The inverter comes standard with 6 metal slugs in fuse holders in the connectio n area. The inverter is designed so that a reverse polarity of all solar module strings will not cause any damage to the inverter when these metal slugs are used.
CAUTION! However, there is a risk of damage and fire to the inverter due to re­verse polarity of a solar module string when the metal slugs are used.
The reverse polarity of a solar module string can cause an unacceptable thermal load, which can lead to an inverter fire. When using metal slugs, always make sure that the polarity is correct before con­necting the individual solar module strings.
If string fuses are used instead of the metal slugs, the reverse polarity of an individual solar module string can cause damage to the inverter and cause an inverter fire.
CAUTION! Risk of damage and fire to inverter due to reverse polarity of solar module strings when using string fuses.
Reverse polarity of solar module strings can lead to an unacceptable overload to a string fuse being used. This can cause a strong ar c, which can lead to an inver t­er fire.
When using string fuses, always make sure that the po larity is correct before con­necting the individual solar module strings.
Overview ‘Connecting Solar Module Strings to the Fronius IG Plus (DC)’ includes the following sec-
tions:
- Ungrounded System: Connecting Solar Module Strings
- Criteria for the Proper Selection of String Fuses
- Ungrounded System: Connecting Solar Module Strings with a Cable Cross Section > 16 mm²
g
- Solar Module Ground at Negative Pole: Connecting Solar Module String s
- Criteria for the Proper Selection of String Fuses
- Solar Module Ground at Negative Pole: Connecting Sola r Module Strings with a Cable Cross Section > 16 mm²
- Solar Module Ground at Negative Pole for Fronius IG Plus
- Solar Module Ground at Positive Pole: Connecting Solar Module Strings
- Criteria for the Proper Selection of String Fuses
- Solar Module Ground at Positive Pole: Connecting Solar Module Strings with a Cable Cross Section > 16 mm²
- Solar Module Ground at Positive Pole for Fronius IG Plus
39
Ungrounded System: Connecting Solar Module
2
Strings
Wire Cross Sec­tion of Solar Mod­ule Strings
Ungrounded sys­tem: Connecting solar module strings
The cable cross section for solar module strings should be a maximum of 16 mm² per ca­ble.
NOTE! To ensure an effective strain relief device for solar module strings, only use cable cross sections of the same size.
1
1
6 x
1
3
1
4
2
3
4
NOTE! Finely stranded cables up to conductor class 5 can be connected to the DC-side terminals without wire end ferrules.
40
4
5
SMON
SMOFF
2
1
3
g
10 mm
1
CAUTION! Danger of damaging the inverter by overload.
- Only connect a maximum of 20 A to an individual DC terminal.
- Connect the DC+ and DC- cables to the correct DC+ and DC- terminals on the inverter.
6
Tightening torque of terminals:
1.2 - 1.5 Nm
IMPORTANT!
- Set the jumper from the 'SM
' position to the 'SM
ON
' position for correct measure-
OFF
ment results
- Check the polarity and voltage of the solar module strings: the voltage should be a max. of 600 V, the difference between the individual solar module strings should be a max. of 10 V.
41
7
2
1
3
SMON
SMOFF
1
2
3
8
max. 600 V
IMPORTANT!
- When connecting solar module strings, you should use metal bolts or string fuses with fuse covers in the fuse holders depending on the solar module manufacturer's instru c­tions.
The metal bolts are included in the inverter scope of delivery.
- Place metal bolts with fuse covers in the fuse holders for unoccupied DC+ terminals.
Selecting String Fuses
9
1
2
10
6 x
For more information on string fuses, see the section "Criteria for the proper selection of string fuses."
If the solar module manufacturer requires the use of string fuses for operation:
- Select string fuses according to the information from the solar module manufacturer or according to "Criteria for the Proper Selection of String Fuses" (max. 20 A per solar module string, max. 6 solar module strings)
42
IMPORTANT!
- Please follow solar module safety instructions
- Follow all solar module manufacturer requirements
Inserting String
1
4
2
3
Fuses
NOTE! If the solar module manufacturer requires the use of string fuses:
- Insert fuses with a fuse cover in the respective fuse holder
- Do not operate the inverter without fuse covers
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1
WARNING! An electric shock can be fatal. Danger from DC voltage from solar modules. Fuse covers are for installation purposes only. They offer no protection against contact.
43
Criteria for the Proper Selection of String Fuses
General The use of string fuses in the inverter also adds fuse protection to the solar modules.
A crucial factor for the fuse protection of solar modules is the maximum short circuit current
of the respective solar module.
I
sc
Criteria for the Proper Selection of String Fuses
Effects of Using Underrated Fuses
Fuse Recommen­dations
The following criteria must be fulfilled for each solar module string when using fuse protec­tion:
> 1.5 x I
-I
N
-IN < 2.0 x I
SC SC
-VN >/= 600 V DC
- Fuse dimensions: Diameter 10.3 x 35 - 38 mm
I
N
I
SC
Nominal current rating of fuse Short circuit current for standard test conditions (STC) according to solar module
data sheet
V
Nominal voltage rating of fuse
N
With underrated fuses, the nominal curr ent value may be less than the short circuit current of the solar module. Effect: The fuse may trip in intensive lighting conditions.
NOTE! Only select fuses suitable for a voltage of 600 V DC.
Application Ex­ample
You should only use the following fuses, which have been tested by Fronius, to ensure problem-free fuse protection:
- Littelfuse KLKD fuses
- Cooper Bussmann PV fuses
Fronius shall not be liable for any damage or other in cidents resulting from the use of other fuses. In addition, all warranty claims are forfeited.
e.g.: Maximum short circuit current (I
) of the solar module = 5.75 A
SC
According to the criteria for selecting the correct fuse, the fuse must have a nominal current greater than 1.5 times the short circuit current:
5.75 A x 1.5 = 8.625 A
The fuse that should be selected according to the "Fuses" table: KLK D 9 with 9.0 A and 600 V AC / DC
44
Fuses
Nominal current Fuse Nominal current Fuse
4.0 A KLK D 4 9.0 A KLK D 9
5.0 A KLK D 5 10.0 A KLK D 10
6.0 A KLK D 6 12.0 A KLK D 12
7.0 A KLK D 7 15.0 A KLK D 15
8.0 A KLK D 8 20.0 A KLK D 20
'Fuses' table: Extract of suitable fuses, e.g. Littelfuse fuses
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45
Ungrounded System: Connecting Solar Module
2
Strings with a Cable Cross Section > 16 mm²
General As an option, you can also connect DC cables to the inverter with a cross section > 16 mm²,
e.g., when the DC cables from the solar modules are combined outsid e of the inverter into a large string.
Additional com­ponents required
Ungrounded sys­tem: Connecting solar module strings with a ca­ble cross section > 16 mm²
The following additional components are required for connectin g DC cables with a cross section > 16 mm²:
- 2 M32 metric screw joints (degree of protection min. IP45)
- 2 connection distributors
*) Metric screw joints and connection dis-
tributors are available from Fronius as an option.
- 2 M10 cable lugs
Select cable lugs that match the availa-
*)
1
ble DC cables
- 2 M10 hexagon nuts
1
6 x
1
3
46
2
4
3
5 mm
DC+
AC
1
3
1
DC+
AC
2
1
6 x
3
4
5
M10
4
g
1
4
2
3
4
CAUTION! Danger of damaging the inverter by overload. Connect the DC+ and DC- cables to the correct DC+ and DC- terminals on the inverter.
5
3
1
M10
3
5
4
6 x
2
6
Tightening torque of terminals:
1.2 - 1.5 Nm Tightening torque of hexagon nut on the connection distributor: max. 15 Nm
7
5 mm
2
1
8
47
Tightening torque of terminals:
SMON
SMOFF
2
1
3
11
2
1
3
SMON
SMOFF
12
1.2 - 1.5 Nm Tightening torque of hexagon nut on the connection distributor: max. 15 Nm
9
1
DC+
DC-
AC
10
IMPORTANT!
- Set the jumper from the 'SM
' position to the 'SM
ON
' position for correct measure-
OFF
ment results
- Check the polarity and voltage of the DC cables strings: The voltage should be a max. of 600 V.
max. 600 V
48
1
13
2
6 x
IMPORTANT When using connection dis­tributors, insert 6 metal bolts with fuse co­vers in the fuse holders. The metal bolts are included in the inverter scope of delivery.
g
49
Solar Module Ground at Negative Pole: Connecting Solar Module Strings
General The following steps are only necessary when the solar module manufacturer requir es a so-
lar module ground at the negative pole.
Wire Cross Sec­tion of Solar Mod­ule Strings
Solar module ground at nega­tive pole: Con­necting solar module strings
The cable cross section for solar module strings should be a maximum of 16 mm² per ca­ble.
NOTE! To ensure an effective strain relief device for solar module strings, only use cable cross sections of the same size.
1
2
1
6 x
1
3
1
4
2
3
4
NOTE! Finely stranded cables up to conductor class 5 can be connected to the DC-side terminals without wire end ferrules.
50
4
5
SMON
SMOFF
2
1
3
g
10 mm
1
CAUTION! Danger of damaging the inverter by overload.
- Only connect a maximum of 20 A to an individual DC terminal.
- Connect the DC+ and DC- cables to the correct DC+ and DC- terminals on the inverter.
6
Tightening torque of terminals:
1.2 - 1.5 Nm
IMPORTANT!
- Set the jumper from the 'SM
' position to the 'SM
ON
' position for correct measure-
OFF
ment results
- Check the polarity and voltage of the solar module strings: the voltage should be a max. of 600 V, the difference between the individual solar module strings should be a max. of 10 V.
51
7
2
1
3
SMON
SMOFF
1
2
3
8
max. 600 V
IMPORTANT!
- When connecting solar module strings, you should use metal bolts or string fuses with fuse covers in the fuse holders depending on the solar module manufacturer's instru c­tions.
The metal bolts are included in the inverter scope of delivery.
- Place metal bolts with fuse covers in the fuse holders for unoccupied DC+ terminals.
Selecting String Fuses
9
1
2
10
6 x
For more information on string fuses, see the section "Criteria for the proper selection of string fuses."
If the solar module manufacturer requires the use of string fuses for operation:
- Select string fuses according to the information from the solar module manufacturer or according to "Criteria for the Proper Selection of String Fuses" (max. 20 A per solar module string, max. 6 solar module strings)
52
IMPORTANT!
- Please follow solar module safety instructions
- Follow all solar module manufacturer requirements
Inserting String
1
4
2
3
Fuses
NOTE! If the solar module manufacturer requires the use of string fuses:
- Insert fuses with a fuse cover in the respective fuse holder
- Do not operate the inverter without fuse covers
g
1
WARNING! An electric shock can be fatal. Danger from DC voltage from solar modules. Fuse covers are for installation purposes only. They offer no protection against contact.
53
Criteria for the Proper Selection of String Fuses
General The use of string fuses in the inverter also adds fuse protection to the solar modules.
A crucial factor for the fuse protection of solar modules is the maximum short circuit current
of the respective solar module.
I
sc
Criteria for the Proper Selection of String Fuses
Effects of Using Underrated Fuses
Fuse Recommen­dations
The following criteria must be fulfilled for each solar module string when using fuse protec­tion:
> 1.5 x I
-I
N
-IN < 2.0 x I
SC SC
-VN >/= 600 V DC
- Fuse dimensions: Diameter 10.3 x 35 - 38 mm
I
N
I
SC
Nominal current rating of fuse Short circuit current for standard test conditions (STC) according to solar module
data sheet
V
Nominal voltage rating of fuse
N
With underrated fuses, the nominal curr ent value may be less than the short circuit current of the solar module. Effect: The fuse may trip in intensive lighting conditions.
NOTE! Only select fuses suitable for a voltage of 600 V DC.
Application Ex­ample
You should only use the following fuses, which have been tested by Fronius, to ensure problem-free fuse protection:
- Littelfuse KLKD fuses
- Cooper Bussmann PV fuses
Fronius shall not be liable for any damage or other in cidents resulting from the use of other fuses. In addition, all warranty claims are forfeited.
e.g.: Maximum short circuit current (I
) of the solar module = 5.75 A
SC
According to the criteria for selecting the correct fuse, the fuse must have a nominal current greater than 1.5 times the short circuit current:
5.75 A x 1.5 = 8.625 A
The fuse that should be selected according to the "Fuses" table: KLK D 9 with 9.0 A and 600 V AC / DC
54
Fuses
Nominal current Fuse Nominal current Fuse
4.0 A KLK D 4 9.0 A KLK D 9
5.0 A KLK D 5 10.0 A KLK D 10
6.0 A KLK D 6 12.0 A KLK D 12
7.0 A KLK D 7 15.0 A KLK D 15
8.0 A KLK D 8 20.0 A KLK D 20
'Fuses' table: Extract of suitable fuses, e.g. Littelfuse fuses
g
55
Solar Module Ground at Negative Pole: Connecting
2
Solar Module Strings with a Cable Cross Section > 16 mm²
General The following steps are only necessary when the solar module manufacturer requir es a so-
lar module ground at the negative pole. As an option, you can also connect DC cables to the inverter with a cross section > 16 mm²,
e.g., when the DC cables from the solar modules are combined outsid e of the inverter into a large string.
Additional com­ponents required
Solar module ground at nega­tive pole: Con­necting solar module strings with a cable cross section > 16 mm²
The following additional components are required for connectin g DC cables with a cross section > 16 mm²:
- 2 M32 metric screw joints (degree of protection min. IP45)
- 2 connection distributors
*) Metric screw joints and connection dis-
tributors are available from Fronius as an option.
- 2 M10 cable lugs
Select cable lugs that match the availa-
*)
1
ble DC cables
- 2 M10 hexagon nuts
1
6 x
1
3
56
2
4
3
5 mm
DC+
AC
1
3
1
DC+
AC
2
1
6 x
3
4
5
M10
4
g
1
4
2
3
4
CAUTION! Danger of damaging the inverter by overload. Connect the DC+ and DC- cables to the correct DC+ and DC- terminals on the inverter.
5
3
1
M10
3
5
4
6 x
2
6
Tightening torque of terminals:
1.2 - 1.5 Nm Tightening torque of hexagon nut on the connection distributor: max. 15 Nm
7
5 mm
2
1
8
57
Tightening torque of terminals:
SMON
SMOFF
2
1
3
11
2
1
3
SMON
SMOFF
12
1.2 - 1.5 Nm Tightening torque of hexagon nut on the connection distributor: max. 15 Nm
9
1
DC+
DC-
AC
10
IMPORTANT!
- Set the jumper from the 'SM
' position to the 'SM
ON
' position for correct measure-
OFF
ment results
- Check the polarity and voltage of the DC cables strings: The voltage should be a max. of 600 V.
max. 600 V
58
1
13
2
6 x
IMPORTANT When using connection dis­tributors, insert 6 metal bolts with fuse co­vers in the fuse holders. The metal bolts are included in the inverter scope of delivery.
g
59
Solar Module Ground at Negative Pole for Fronius IG Plus
General Some manufacturers of solar modules stipulate that the module must be grounded.
IMPORTANT: Take into account the following points if a solar module ground is required:
- Specifications of the solar module manufacturer regarding polarity and required type of solar module ground
- National provisions
Solar Module Ground at Nega­tive Pole
Solar Module Ground at Nega­tive Pole for Fro­nius IG Plus
Example: Solar module ground at negative pole with
(1)
DC+
DC-
(2)
L
N
=~=
(3)
fuse or high ohm resistor
(1) Solar module (2) Inverter (3) Fuse / High ohm resistor
~
PE
You can ground solar modules in the Fronius IG Plus using a fuse or a high ohm resistor.
Fuse holder on the Fronius IG Plus for the solar module ground
60
Fronius recommends a fuse with 1 A and a dimension of 10 x 38 mm for solar module grounding.
For solar module grounding usin g a hi gh ohm resistor, Fronius exclusively recom­mends the "100 kohm Grounding Kit" opti­on.
Safety
WARNING! An electric shock can be fatal. Danger from DC voltage from solar
modules. The inverter's insulation monitoring is deactivated when the solar mod­ules are grounded.
- Ensure that grounded solar modules are designed so that they are isolated according to Protection Class II
- Place the relevant safety sticker in a clearly visible place on the photovoltaic system
- Set the inverter so that an error message is displayed if the fuse trips.
Safety Label for the Solar Module Ground IMPORTANT: Safety labels and the fuse
for solar module grounding are not includ­ed in the inverter scope of delivery, and
Warnung!
Ein elektrischer Schlag kann tödlich sein. Gefahr durch DC-Spannung von den Solarmodulen. Die Isolationsüberwachung des Wechsel­richters ist deaktiviert. Die Solarmodule sind geerdet. VorArbeiten an der Photovoltaik-Anlage AC- und DC-Seite spannungsfrei schalten.
Warnung!
Ein elektrischer Schlag kann tödlich sein. Gefahr durch DC-Spannung von den Solarmodulen. Die Isolationsüberwachung des Wechselrichters ist deaktiviert. Die Solarmodule sind geerdet. VorArbeiten an der Photovoltaik-k­AnlageAC- und DC-Seite spannungs­frei schalten.
Warnung!
Ein elektrischer Schlag kann tödlich sein. Gefahr durch DC-Spannung von den Solarmodulen. Die Isolationsüberwachung des Wechselrichters ist deaktiviert. Die Solarmodule sind geerdet. VorArbeiten an der Photovoltaik-k­AnlageAC- und DC-Seite spannungs­frei schalten.
Warnung!
Ein elektrischer Schlag kann tödlich sein. Gefahr durch DC-Spannung von den Solarmodulen. Die Isolationsüberwachung des Wechsel­richters ist deaktiviert. Die Solarmodule sind geerdet. VorArbeiten an der Photovoltaik-Anlage AC- und DC-Seite spannungsfrei schalten.
Warnung!
Ein elektrischer Schlag kann tödlich sein. Gefahr durch DC-Spannung von den Solarmodulen. Die Isolationsüberwachung des Wechselrichters ist deaktiviert. Die Solarmodule sind geerdet. VorArbeiten an der Photovoltaik-k­AnlageAC- und DC-Seite spannungs­frei schalten.
must be obtained separately.
g
Setting inverters for grounded so­lar modules
Solar Module Ground: Inserting Fuse or "100 kohm Grounding Kit" Option
When solar modules are grounded, the inverter's insulation monitor ing is deactivated. For this reason, you must make a setting in the 2nd level of the Setup menu so that an error message is displayed or the inverter turns off when the ground fuse is blown (depending on the country setup). A code is required to access the 2nd level of the Setup menu. This code can be obtained from Fronius. Additional information regarding accessing the 2nd level of the Setup men u will be provided along with the code.
NOTE! If the solar module manufacturer requires a ground for solar modules at the negative pole:
- Insert the "100 kohm Grounding Kit" option into the fuse holder completely with the plastic jacket
- Do not operate the inverter without the plastic jacket when using the "100 kohm Grounding Kit" option
or
- Insert the fuse with a fuse cover in the fuse holder
- Do not operate the inverter without a fuse cover
WARNING! An electric shock can be fatal. Danger from DC voltage from solar modules. Fuse covers are for installation purposes only. They offer no protection against contact.
The DC main switch is only used to switch off power to the power stage set. When the DC main switch is turned off, the solar module ground at the negative pole re­mains unaffected. Never touch the DC+ and DC-.
61
Inserting a fuse: Inserting the "100 kohm Grounding
4
1
2
3
*)
3
1
2
*)
Kit" option:
1
*) The plastic bolts are included in
the inverter scope of delivery
Fronius recommends a fuse with 1 A and a dimension of 10 x 38 mm for solar mod­ule grounding.
1
*) Remove standard fuse holder with
plastic bolt
Insert the "100 kohm Grounding Kit" op­tion into the fuse holder completely with the plastic jacket
Opening Fronius IG Plus for Ser­vice/Maintenance
Inserting the fuse will ground the solar module at the negative pole.
Inserting the "100 kohm Grounding Kit" option grounds the solar module at the negative pole via a high ohm resistor.
Procedure for opening the inverter for service or maintenance:
Disconnect AC and DC supply from the inverter
1
Open the connection area
2
Turn off DC main switch
3
Allow the capacitors to discharge (5 minutes)
4
Remove metal covers
5
If present, remove the fuse for the solar module ground
6
If present, remove string fuses
7
Disconnect DC wire
8
Disconnect AC wire
9
62
Solar Module Ground at Positive Pole: Connecting
1
3
2
4
DC
+
DC
-
Solar Module Strings
General The following steps are necessary when the solar module manufacturer requires a solar
module ground at the positive pole.
Wire Cross Sec­tion of Solar Mod­ule Strings
Solar module ground at posi­tive pole: Con­necting solar module strings
The cable cross section for solar module strings should be a maximum of 16 mm² per ca­ble.
NOTE! To ensure an effective strain relief device for solar module strings, only use cable cross sections of the same size.
1
2
g
1
6 x
1
3
1
4
2
3
4
4
After disconnecting the DC main switch cable:
- Connect the DC+ cable to the DC- connection as per step 5
- Connect the DC- cable to the DC+ connection as per step 5
- Identify the reversed polarity with (+) and (-) according to steps 6 and 7
63
5
DC
+
DC
-
1
2
DC
+
3
2
6
1
DC
-
1
4
5
7
DC
-
1
+
DC
2
NOTE! Finely stranded cables up to conductor class 5 can be connected to the DC-side terminals without wire end ferrules.
8
10 mm
1
64
CAUTION! Danger of damaging the inverter by overload.
DC
+
1
DC
-
2
DC
­DC
+
3
4
11
12
- Only connect a maximum of 20 A to an individual DC terminal.
- Connect the DC+ cable to the right connection block of the inverter's DC ter­minals.
- Connect the DC- cable to the left connection block of the inverter's DC termi­nals.
- Identify the reversed polarity with (+) and (-) according to step 10
g
9
DC-
DC+
10
DC
+
DC-
DC
-
DC-
DC
DC+
DC
DC+
-
+
Tightening torque of terminals:
1.2 - 1.5 Nm
IMPORTANT!
- Set the jumper from the 'SM
' position to the 'SM
ON
' position for correct measure-
OFF
ment results
- Check the polarity and voltage of the solar module strings: the voltage should be a max. of 600 V, the difference between the individual solar module strings should be a max. of 10 V.
max. 600 V
1
2
SMON
3
SMOFF
65
3
13
14
15
2
SMON
1
SMOFF
IMPORTANT!
- When connecting solar module strings, you should use metal bolts with fuse cove rs in the fuse holders depending on the solar module manufacturer's instructions.
The metal bolts are included in the inverter scope of delivery.
- Place metal bolts with fuse covers in the fuse holders for unoccupied DC+ terminals.
1
1
Selecting String Fuses
2
3
2
6 x
If the solar module manufacturer requires the use of string fuses for operation:
- Select string fuses according to the information from the solar module manufacturer or according to "Criteria for the Proper Selection of String Fuses" (max. 20 A per solar module string, max. 6 solar module strings)
IMPORTANT!
- Please follow solar module safety instructions
- Follow all solar module manufacturer requirements
Inserting String Fuses
66
NOTE! If the solar module manufacturer requires the use of string fuses:
- Insert fuses with a fuse cover in the respective fuse holder
- Do not operate the inverter without fuse covers
1
WARNING! An electric shock can be fatal. Danger from DC voltage
1
from solar modules. Fuse covers are for installation purposes only.
g
They offer no protection against
2
3
4
contact.
67
Criteria for the Proper Selection of String Fuses
General The use of string fuses in the inverter also adds fuse protection to the solar modules.
A crucial factor for the fuse protection of solar modules is the maximum short circuit current
of the respective solar module.
I
sc
Criteria for the Proper Selection of String Fuses
Effects of Using Underrated Fuses
Fuse Recommen­dations
The following criteria must be fulfilled for each solar module string when using fuse protec­tion:
> 1.5 x I
-I
N
-IN < 2.0 x I
SC SC
-VN >/= 600 V DC
- Fuse dimensions: Diameter 10.3 x 35 - 38 mm
I
N
I
SC
Nominal current rating of fuse Short circuit current for standard test conditions (STC) according to solar module
data sheet
V
Nominal voltage rating of fuse
N
With underrated fuses, the nominal curr ent value may be less than the short circuit current of the solar module. Effect: The fuse may trip in intensive lighting conditions.
NOTE! Only select fuses suitable for a voltage of 600 V DC.
Application Ex­ample
You should only use the following fuses, which have been tested by Fronius, to ensure problem-free fuse protection:
- Littelfuse KLKD fuses
- Cooper Bussmann PV fuses
Fronius shall not be liable for any damage or other in cidents resulting from the use of other fuses. In addition, all warranty claims are forfeited.
e.g.: Maximum short circuit current (I
) of the solar module = 5.75 A
SC
According to the criteria for selecting the correct fuse, the fuse must have a nominal current greater than 1.5 times the short circuit current:
5.75 A x 1.5 = 8.625 A
The fuse that should be selected according to the "Fuses" table: KLK D 9 with 9.0 A and 600 V AC / DC
68
Fuses
Nominal current Fuse Nominal current Fuse
4.0 A KLK D 4 9.0 A KLK D 9
5.0 A KLK D 5 10.0 A KLK D 10
6.0 A KLK D 6 12.0 A KLK D 12
7.0 A KLK D 7 15.0 A KLK D 15
8.0 A KLK D 8 20.0 A KLK D 20
'Fuses' table: Extract of suitable fuses, e.g. Littelfuse fuses
g
69
Solar Module Ground at Positive Pole: Connecting
2
Solar Module Strings with a Cable Cross Section > 16 mm²
General The following steps are only necessary when the solar module manufacturer requir es a so-
lar module ground at the negative pole. As an option, you can also connect DC cables to the inverter with a cross section > 16 mm²,
e.g., when the DC cables from the solar modules are combined outsid e of the inverter into a large string.
Additional com­ponents required
Solar module ground at posi­tive pole: Con­necting solar module strings with a cable cross section > 16 mm²
The following additional components are required for connectin g DC cables with a cross section > 16 mm²:
- 2 M32 metric screw joints (degree of protection min. IP45)
- 2 connection distributors
*) Metric screw joints and connection dis-
tributors are available from Fronius as an option.
- 2 M10 cable lugs
Select cable lugs that match the availa-
*)
1
ble DC cables
- 2 M10 hexagon nuts
1
6 x
1
3
70
2
4
3
1
3
2
4
DC
+
DC
-
DC
+
DC
-
1
2
DC
-
DC
+
2
1
7
5 mm
1
2
8
4
g
1
4
2
3
4
After disconnecting the DC main switch cables:
- Connect the DC+ cable to the DC- connection as per step 5
- Connect the DC- cable to the DC+ connection as per step 5
- Identify the reversed polarity with (+) and (-) according to steps 6 and 7
5
DC
+
3
2
1
6
DC
-
1
4
5
71
CAUTION! Danger of damaging the inverter by overload.
3
1
6 x
2
M10
5
3
4
DC-
1
DC-
AC
11
2
1
6 x
3
4
5
M10
DC+
12
- Connect the DC+ cable to the right connection block of the inverter's DC ter­minals.
- Connect the DC- cable to the left connection block of the inverter's DC termi­nals.
- Identify the reversed polarity with (+) and (-) according to step 14
9
Tightening torque of terminals:
1.2 - 1.5 Nm Tightening torque of hexagon nut on the connection distributor: max. 15 Nm
10
72
5 mm
DC+
2
1
AC
Tightening torque of terminals:
1.2 - 1.5 Nm Tightening torque of hexagon nut on the connection distributor: max. 15 Nm
13
DC
DC
+
1
DC
-
2
DC
­DC
+
3
4
14
15
16
2
1
3
SMON
SMOFF
17
g
+
1
DC
-
DC
-
DC
+
DC-
DC+
AC
IMPORTANT!
- Set the jumper from the 'SM
' position to the 'SM
ON
' position for correct measure-
OFF
ment results
- Check the polarity and voltage of the DC cables strings: The voltage should be a max. of 600 V.
1
2
SMON
3
SMOFF
IMPORTANT! When using connection distributors, insert 6 metal bolts with fuse covers in the fuse holders. The metal bolts are included in the Fronius IG Plus scope of delivery.
73
1
18
2
6 x
74
Solar Module Ground at Positive Pole for Fronius IG Plus
General Some manufacturers of solar modules stipulate that the module must be grounded.
IMPORTANT: Take into account the following points if a solar module ground is required:
- Specifications of the solar module manufacturer regarding polarity and required type of solar module ground
- National provisions
Solar Module Ground at Posi­tive Pole
(1)
(2)
DC+
L
N
Example: Solar module ground at positive pole with fuse or high ohm resistor
(1) Solar module (2) Inverter (3) Fuse / High ohm resistor
=~=
(3)
~
DC-
PE
g
Solar Module Ground at Posi­tive Pole for Fro­nius IG Plus
You can ground solar modules in the Fronius IG Plus using a fuse or a high ohm resistor.
Fuse holder on the Fronius IG Plus for the solar module ground
Fronius recommends a fuse with 1 A and a dimension of 10 x 38 mm for solar module grounding.
For solar module grounding usin g a hi gh ohm resistor, Fronius exclusively recom­mends the "100 kohm Grounding Kit" opti­on.
75
Safety
WARNING! An electric shock can be fatal. Danger from DC voltage from solar
modules. The inverter's insulation monitoring is deactivated when the solar mod­ules are grounded.
- Ensure that grounded solar modules are designed so that they are isolated according to Protection Class II
- Place the relevant safety sticker in a clearly visible place on the photovoltaic system
- Set the inverter so that an error message is displayed if the fuse trips.
Safety Label for the Solar Module Ground IMPORTANT: Safety labels and the fuse
for solar module grounding are not includ­ed in the inverter scope of delivery, and
Warnung!
Ein elektrischer Schlag kann tödlich sein. Gefahr durch DC-Spannung von den Solarmodulen. Die Isolationsüberwachung des Wechsel­richters ist deaktiviert. Die Solarmodule sind geerdet. VorArbeiten an der Photovoltaik-Anlage AC- und DC-Seite spannungsfrei schalten.
Warnung!
Ein elektrischer Schlag kann tödlich sein. Gefahr durch DC-Spannung von den Solarmodulen. Die Isolationsüberwachung des Wechselrichters ist deaktiviert. Die Solarmodule sind geerdet. VorArbeiten an der Photovoltaik-k­AnlageAC- und DC-Seite spannungs­frei schalten.
Warnung!
Ein elektrischer Schlag kann tödlich sein. Gefahr durch DC-Spannung von den Solarmodulen. Die Isolationsüberwachung des Wechselrichters ist deaktiviert. Die Solarmodule sind geerdet. VorArbeiten an der Photovoltaik-k­AnlageAC- und DC-Seite spannungs­frei schalten.
Warnung!
Ein elektrischer Schlag kann tödlich sein. Gefahr durch DC-Spannung von den Solarmodulen. Die Isolationsüberwachung des Wechsel­richters ist deaktiviert. Die Solarmodule sind geerdet. VorArbeiten an der Photovoltaik-Anlage AC- und DC-Seite spannungsfrei schalten.
Warnung!
Ein elektrischer Schlag kann tödlich sein. Gefahr durch DC-Spannung von den Solarmodulen. Die Isolationsüberwachung des Wechselrichters ist deaktiviert. Die Solarmodule sind geerdet. VorArbeiten an der Photovoltaik-k­AnlageAC- und DC-Seite spannungs­frei schalten.
must be obtained separately.
Setting inverters for grounded so­lar modules
Solar Module Ground: Inserting Fuse or "100 kohm Grounding Kit" Option
When solar modules are grounded, the inverter's insulation monitor ing is deactivated. For this reason, you must make a setting in the 2nd level of the Setup menu so that an error message is displayed or the inverter turns off when the ground fuse is blown (depending on the country setup). A code is required to access the 2nd level of the Setup menu. This code can be obtained from Fronius. Additional information regarding accessing the 2nd level of the Setup men u will be provided along with the code.
NOTE! If the solar module manufacturer requires a ground for solar modules at the positive pole:
- Insert the "100 kohm Grounding Kit" option into the fuse holder completely with the plastic jacket
- Do not operate the inverter without the plastic jacket when using the "100 kohm Grounding Kit" option
or
- Insert the fuse with a fuse cover in the fuse holder
- Do not operate the inverter without a fuse cover
WARNING! An electric shock can be fatal. Danger from DC voltage from solar modules. Fuse covers are for installation purposes only. They offer no protection against contact.
76
The DC main switch is only used to switch off power to the power stage set. When the DC main switch is turned off, the solar module ground at the negative pole re­mains unaffected. Never touch the DC+ and DC-.
Inserting a fuse: Inserting the "100 kohm Grounding
4
1
2
3
*)
3
1
2
*)
Kit" option:
1
1
g
Opening Fronius IG Plus for Ser­vice/Maintenance
*) The plastic bolts are included in
the inverter scope of delivery
Fronius recommends a fuse with 1 A and a dimension of 10 x 38 mm for solar mod­ule grounding.
Inserting the fuse will ground the solar module at the positive pole.
*) Remove standard fuse holder with
plastic bolt
Insert the "100 kohm Grounding Kit" op­tion into the fuse holder completely with the plastic jacket
Inserting the "100 kohm Grounding Kit" option grounds the solar module at the positive pole via a high ohm resistor.
Procedure for opening the inverter for service or maintenance:
Disconnect AC and DC supply from the inverter
1
Open the connection area
2
Turn off DC main switch
3
Allow the capacitors to discharge (5 minutes)
4
Remove metal covers
5
If present, remove the fuse for the solar module ground
6
If present, remove string fuses
7
Disconnect DC wire
8
Disconnect AC wire
9
77
Closing Fronius IG Plus
1
1
3
2
Closing Fronius IG Plus
1
2
1
3
3
4
1
2
78
Inserting Option Cards
1
4
7
8
1
3
2
5
6
g
Suitable Option Cards
Safety
There are several options and system upgrades available for the inverter, e.g.:
- Datalogger and modem interfaces (for using a PC to record and manage data from your photovoltaic system)
- Various large displays (public display)
- Actuators / relays / alarms (signal card)
System upgrades come in the form of plug-in cards. The inverter can be equipped with three option cards.
WARNING! An electric shock can be fatal. Danger due to grid voltage and DC voltage from solar modules.
- The connection area should only be opened by a licensed electrician.
- Never work with live wires! Prior to all connection work, make sure that the AC and DC wires are not charged.
WARNING! An electric shock can be fatal. Danger from residual voltage from ca­pacitors.
You must wait until the capacitors have discharged. Discharge takes 5 minutes.
NOTE! Follow general ESD precautions when handling option cards.
Inserting option cards into the Fronius IG Plus
2
1
79
3
1
1
3
2
4
4
5
5
*
1
3
4
2
4
IMPORTANT! When networking several DATCOM components, a termination plug must be placed on each free IN and/or OUT connection of a DATCOM component.
IMPORTANT! Close any unused openings at the sealing insert using corresponding blanking plugs.
Closing Fronius IG Plus
1
1
1
2
3
2
1
3
3
4
1
2
80
Data Communication and Solar Net
12 3
Fronius IG Plus
Fronius IG Plus
Fronius IG Plus
Com Card
Datalogger C.
IN
OUT
Com Card
Com Card
IN
OUT
RS 232
IN
OUT
Sensor Box
IN OUT
°C
W/m²
m/s
PC
g
Solar Net and Data Interface
Fronius developed Solar Net to make these add-on system components flexible and ca­pable of being used in a wide variety of different app lications. Solar Net is a data networ k which enables several inverters to be linked with the system upgrades.
Solar Net is a bus system. A single cable is all that is required for one or more inverters to communicate with all system upgrade components.
The core of the Solar Net is the Fronius Datalogger. It coordinates the data traffic and makes sure that even large volumes of data are distributed quickly and reliably.
The 'Fronius COM Card' option is required to integrate an inverter into Solar Net. Important Every inverter that is to be monitored using a Datalogger requires a 'Fronius
COM Card.' In this case, the ‘Fronius Com Card’ serves as a link between the internal network of the inverter and the Solar Net interface of the Fronius Datalogge r.
Important Each inverter can only have one 'Fronius Com Card.' A network may only con­tain one Fronius Datalogger.
The first inverter with a 'Fronius COM card' can be up to 1000 m (3280 ft) away from the last inverter with a 'Fronius COM card.'
Different system upgrades are detected automatically by Solar Net. In order to distinguish between several identical system upgrades, each one must be as-
signed a unique number. In order to uniquely identify each inverter in Solar Net, each inverter must also be as-
signed an individual number. You can assign individual numbers as per 'The Setup Menu' section in this manual.
More detailed information on the individual system upgrades can be found in the rel evant operating instructions or on the Internet at http:\\www.fronius.com.
Example Logging and archiving inverter and sensor data using a Fronius Datalogger and Fronius
Sensor Box:
= Terminating plug
Illustration explanation: Data network with 3 Fronius IG Plus units and one Fronius Se nsor Box:
81
- all Fronius IG Plus units have one 'Fronius COM Card'
- one Fronius IG Plus has a 'Fronius Datalogger Card' (no. 2)
- Fronius Datalogger has two RS-232 interfaces for connecting to a PC and a modem Option cards communicate within the Fronius IG Plus via its internal network. External
communication (Solar Net) takes place via the 'Fronius Com Cards.' Each 'Fronius Com Card' is equipped with two RS485 interfaces - an input and an output. RJ45 plug connec­tors are used to connect to these cards.
82
Commissioning
off
on
1
2
ON
AC
2
g
Factory Configu­ration
Start-up opera­tion
The inverter has been pre-configured in the factory and is ready for operation. To change your inverter settings, please see "The Setup Menu" section in these instruc-
tions.
Once the inverter has been connected to the solar modules (DC) and the public grid (AC), turn the main switch to position - 1 -.
NOTE! Regardless of whether bolts or fuses are used, do not operate the inverter without fuse covers.
NOTE! To ensure the degree of protection at the inverter:
- Insert blanking plugs into all openings at the sealing insert in which there ar e no cables
- If cables are run through the sealing insert, ins er t the rem ainin g bla n king plugs in the recesses located on the outside
1
- As soon as the photovoltaic modules prod u ce suffic i en t po we r, th e Op e ratin g S tat us LED lights up orange. The screen displays the startup phase. The orange LED indi­cates that the feed-in mode of the inverter will begin shortly.
- After the automatic inverter start, the Operating Status LED lights up green.
- Provided that power continues to feed into the grid, the Operating Status LED will re­main green to confirm that the inverter is functioning correctly.
Setting Inverters for Available So­lar Module Ground
NOTE! If a solar module ground is used, the corresponding grounding mode must
be set in the 'Basic Service Menu' after the inverter is turned on. A 5-character access code is required to access the 'Basic Service Menu.' This
access code will be provided by Fronius upon request.
If a solar module ground is being used, the status message 502 "Insulation value too low" will be displayed after the inverter is turned on and upon completion of the startup phase.
83
Confirm the status message by pres-
6
1
sing the "Enter" key
The current insulation value is displayed.
Press the "Menu" key
2
The "menu" is displayed.
Select the "Setup" mode using the
3
"Left" or "Right" keys
Press the unassigned "Esc" key 5 x
4
"CODE" is displayed, the first digit flashes.
Use the "Up" and "Down" keys to se-
5
lect the value for the first digit of the ac­cess code
Press the "Enter" key
The second digit flashes.
Use the "Up" and "Down" keys to se-
7
lect a value for the second digit of the access code
Press the "Enter" key
8
The third digit flashes.
Use the "Up" and "Down" keys to se-
9
lect a value for the third digit of the ac­cess code
Press the "Enter" key
10
84
The fourth digit flashes.
11
12
13
14
*)
15
16
17
18
Use the "Up" and "Down" keys to se­lect a value for the fourth digit of the ac­cess code
Press the "Enter" key
The fifth digit flashes.
Use the "Up" and "Down" keys to se­lect a value for the fifth digit of the ac­cess code
Press the "Enter" key
The access code flashes. *) ... Code example
Press the "Enter" key
The inverter is now in the Basic Service me­nu, the first parameter is displayed:
- 'MIXMODE' for multiphase inverters
- 'DCMODE' for one-phase inverters
g
Use the "Up" or "Down" keys to select the 'GNDMODE' parameter
Press the "Enter" key
The grounding mode is displayed.
Use the "Up" and "Down" keys to se­lect the grounding mode:
OFF = no solar module ground (factory set­ting)
85
NEG = solar module ground at negative
19
20
pole
POS = solar module ground at positive pole
-100 kohm = solar module ground at nega­tive pole using high ohm resistor
+100 kohm = Solar module ground at posi­tive pole using high ohm resistor
Press the "Enter" key to apply the re­quired grounding mode
Press the "Esc" key to exit the Basic Service menu
86
Operation
Product Description Fronius IG Plus
(1)
(6)
(5)
(4) (3)
(2)
Controls and Indi­cators
Item Function (1) Display
for displaying values, settings and menus
g
(2) Operating Status LED
for displaying the operating status
(3) "Enter" key
for confirming a selection
(4) "Menu / Esc" key
for scrolling through menu options for exiting the Setup menu
(5) "Down/Right" key
depending on the selection: for navigating down for navigating right
(6) "Left/Up" key
depending on the selection: for navigating left for navigating up
Display The display unit's power is supplied via the safety-low voltage of the solar modules, which
means that the display unit can be used only in the daytime.
IMPORTANT! The inverter display is not a calibrated measuring instrument. A slight inac­curacy of a few percent is intrinsic to the system. A calibrated meter will be needed to make calculations for the power supply company.
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Item Function
(11) (10)
(3) (4) (5)
(6)
(7)
(13) (12)
(9) (8)
(1) (2)
(1) Icons for the "Now" display mode (2) Icons for the "Day" display mode (3) Icons for the "Year" display mode (4) Icons for the "Total" display mode (5) Icons for the "Setup" display mode (6) Icons for operating conditions
The value shown represents the maximum value within the period of observation (depending on which display mode is selected).
The value shown represents the minimum value within the period of observation (depending on which display mode is selected).
Important The minimum and maximum value s disp la ye d do not rep ­resent the absolute extreme values, because data ar e recorde d only at two-second intervals.
... appears when values are displayed which are directly associated with the solar modules
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(7) Range for display unit
(8) Icon for the "Enter" key (9) Icons for the "Menu/Esc" key (10) Icons for the "Down/Right" key (11) Icons for the "Left/Up" key (12) Range for display value
... appears when values are displayed which are directly associated with the public grid
... appears with data readings that are directly related to the inverter
for displaying the applicable measuring unit
for displaying the value
Item Function (13) Output bar (not active during setup)
indicates the output power fed into the grid at a given moment - regardless of the display mode chosen. The screen displays % of the maximum possible output power of your solar inverter
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Operating Status LED
Position of Operating Status LED on the in­verter
Depending on the operating status, the Operating Status LED assumes different colors:
Operating Status LED Explanation
Steady green The LED stays lit after the automatic startup phase of the invert-
er as long as power is being fed into the grid. It indicates problem-free operation of the pho tovoltaic system.
Flashing green The photovoltaic system is working correctly, a status code is on
the display. When a status code is shown, rectify the relevant condition by
going to the "Maintenance and Service" chapter, "Status Diag­nosis and Troubleshooting" section. The status code can be ac­knowledged by pressing the "Enter" key.
Steady orange The inverter enters an automatic startup phase as soon as the
solar modules are delivering sufficient power after sunrise.
Flashes orange A warning is shown on the display
or the inverter has been set to standby operation in the Setup menu (= manual shutoff of operation).
The next day, operation will resume automatically. During the time the LED flashes orange, operation can be re-
sumed manually at any time (see section "The Setup Menu")
Steady red General status: the respective status code is shown on the
screen
Remains dark There is no connection to the solar modules,
no solar module power due to darkness.
A list of most status codes, the corresponding status information, their status causes and repair measures can be found in the chapter "Troubleshooting and Ma intenance," section "Status Diagnosis and Troubleshooting."
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Startup Phase and Grid Feed-in Mode
Startup phase The inverter carries out a self test after being turned on automatically. Then a test of the
public grid is carried out. This test can take from several seconds up to several minutes depending on local regulations. During the startup sequence the illumination of the Oper­ating Status LED is orange.
Test Procedure 1. Segment test
All display elements light up for about one second
2. Self test of important inverter components
- The inverter goes through a master check list for several seconds
- The display will show "TEST" as well as the component currently being tested
(e.g., "LED")
3. Synchronization with grid:
- "WAIT PS" is displayed, the inverter icon flashes: The inverter waits for all power
stage sets on the grid to be operational. This pro cedu re is d epend ent o n the DC voltage.
- Next, the display shows "SYNC AC," the grid icon flashes
4. Startup test
- Before the inverter begins feeding power into the grid, grid conditions are tested
according to local regulations.
- The display shows "START UP"
92
The startup test can take anything from just a few seconds up to several minutes de­pending on national regulations. The time elapsed is indicated by a bar shrinking from the top down.
Whenever two scale divisions stop flashing and disappear, 1/10 of the total duration of the test is over.
g
Operation of Feeding Energy into the Grid
- Once the tests have been completed, the inverter starts feeding power into the grid.
- The display shows the present power feeding into the grid.
- The Operating Status LED lights up green, and the inverter starts operating.
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Navigation in the Menu Level
Activating display illumination
Automatic switch to the "Now" dis­play mode or the startup phase
Press any key
1
The display illumination is activated. If no key is pressed for 30 seconds, the display backlight goes out (provided that the
display illumination is set to automatic in the Setup menu). The Setup menu also offers a choice between a permanently lit or permanently dark
display.
If no key is pressed for 2 minutes:
- While power is being fed into the grid, the inverter automatically switches to the "Now" display mode and the present output power is displayed.
- If the inverter is not feeding power into the grid, the inverter automatically switches to the startup phase for synchronization with the grid.
The inverter switches to the "Now" display mode or startup pha se from anywhere with­in the display modes or the Setup menu.
Accessing the Menu Level
(1)
Press the "Menu" key (1)
1
94
"Menu" will appear on the display The inverter is now in the menu level. From the menu level you can
- set the desired display mode
- access the Setup menu
g
95
The Display Modes
2
The Display Modes
Selecting a Dis­play Mode
"Now" display mode ...... Displays real-time values
"Day" display mode ...... Displays values for power fed into the grid during that day
"Year" display mode ...... Displays values for the present calendar year - only avail-
able in combination with optional Fronius Datalogger
"Total" display mode ...... Displays values for power fed into the grid since the in-
verter was started for the first time
Accessing the menu level
1
(1) (2) (3) (4)
Use the "left" (7) or "right" (6) keys to select your preferred display mode (1)
- (4)
Press "Enter" (5)
3
Overview of Dis­play Values
(7)
Display mode
"Now" W - Output power
(6) (5)
The selected display mode is shown, e.g., "Day" display mode.
IMPORTANT! The "Year" menu option is supported only when the optional Fronius Datalogger is connected. This system up­grade includes a real-time clock.
Symbol Unit Optional Display value
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Display mode
"Day" kWh / MWh - Energy fed into the grid "Year" Currency - Return
Symbol Unit Optional Display value
V - Grid voltage A - Output current
Hz - Grid frequency
V - Solar module voltage A - Solar module current
Mohm - Insulation resistance
HH:MM x Time
g
"Total" kg / T - CO
W - Max. output power
V - Maximum grid voltage V - Minimum grid voltage V - Maximum array voltage
HH:MM - Service hours completed by the in-
verter
xOptional
If the DatCom component for the required opt ion s is not av aila b l e, th e message "N.A." (not available) is shown.
reduction
2
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Display Values in "Now" Display Mode
(1) (2)
2
Selecting the "Now" Display Mode
Display values in the "Now" display mode
Select the "Now" display mode
1
The first display value in the "Now" display mode appears
Use the "Down" (2) key to scroll to the next display value
Scroll back using the "Up" key (1)
Output power
Power (in watts) currently being fed into the grid
The "Enter" key is active depending on the country setup or the device-specific settings.
- The present apparent power for the device can be displayed in VA by pressing the "Enter" key.
- The present operating mode can be displayed by pressing the "Up" and "Down" keys.
The "Enter" key can also be active if a Fronius Power Control Box is located in the So lar Net and power reduction has been triggered by the utility company.
- The power reduction is displayed as a % by pressing the "Enter" key.
- You can display how long the power reduction has been in effect by pressing the "Up" and "Down" keys.
In cases where both are occurring, you can display the apparent power by pressing the "Enter" key. Then you can scroll through the remaining parameters using the "Up" and "Down" keys.
- You can return to the menu level by pressing the "Menu" key.
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