Kaco blueplanet 20.0 TL3 User manual

These instructions form part of the product and must be observed. They must also be stored in a place which is freely
accessible at all times.
Operating Instructions
English translation of German
original
blueplanet
. TL

The copyright for these operating instructions is held solely by KACO new energy GmbH.

EN
KACO Operating Instructions blueplanet . TL Page 
Operating Instructions
Contents
 General information .................................
. About this document............................................
. Layout of Instructions...........................................
. Target group.............................................................
 Safety ......................................................... 
. Proper use.................................................................
. Protection features ................................................
. More information...................................................
 Description ................................................ 
. Mode of Operation ................................................ 
. Diagram ..................................................................... 
 Technical Data ......................................... 
. Electrical data ........................................................ 
. Mechanical data.....................................................
. Identication...........................................................
 Transportation and Delivery...................
. Delivery.....................................................................
. Transportation........................................................
 Mounting ..................................................
. Unpacking............................................................... 
. Installing the unit................................................. 
 Electrical connection .............................. 
. Preparing the AC connection...........................
. Connection to the power grid.........................
. Preparing the DC connection .......................... 
. Connecting the PV generator..........................
. Grounding the housing .....................................
. Connecting the interfaces.................................
. Sealing the connection area ............................
. Switching on the device ....................................
 Conguration and Operation................. 
. Controls....................................................................
. Initial start-up ........................................................
. Menu structure......................................................
. Monitor inverter....................................................
. Performing the software update....................
 Maintenance/Troubleshooting ..............
. Visual inspection.................................................. 
. Cleaning the housing ........................................ 
. Replacing or cleaning the fans....................... 
. Shutting down for maintenance and
troubleshooting....................................................
. Disconnecting connections............................. 
. Faults........................................................................ 
. "Fault" messages on the display/LED............ 
 Service...................................................... 
 Shutdown/Disassembly.......................... 
. Switching o the unit.........................................
. Uninstalling the device ......................................
. Disassembling the unit ......................................
. Packaging the unit...............................................
. Storing the unit.....................................................
 Disposal ................................................... 
 Appendix ................................................. 
. EU Declaration of Conformity..........................

ENEN
General information
Page  KACO Operating Instructions blueplanet . TL
 General information
. About this document
WARNING
Improper handling of the device can be hazardous!
›You must read and understand the operating instructions so that you can install and use the
device safely!
.. Other applicable documents
During installation, observe all assembly and installation instructions for components and other parts of the system.
These instructions also apply to the equipment, related components and other parts of the system.
Some of the documents which are required for the registration and approval of your photovoltaic (PV) system are
included with the operating instructions.
.. Storing the documents
These instructions and other documents must be stored near the system and be available at all times. The content
of these instructions is revised on a regular basis and updated if necessary. You can download the current version of
the operating instructions at www.kaco-newenergy.com.
.. English translation of German original
These operating instructions have been produced in several languages. The German-language version of the
operating instructions is the original version. All other language versions are translations of the original operating
instructions.
. Layout of Instructions
.. Symbols used
General hazard Risk of re or explosion
High voltage Risk of burns
Authorised electrician Only authorised electricians are permitted to carry out tasks indicated with this
symbol!
.. Safety warnings symbols guide
DANGER
High risk
Failure to observe this warning will lead directly to serious bodily injury or death.
WARNING
Potential risk
Failure to observe this warning may lead to serious bodily injury or death.
CAUTION
Low-risk hazard
Failure to observe this warning will lead to minor or moderate bodily injury.

EN
Safety
KACO Operating Instructions blueplanet . TL Page 
CAUTION
Risk of damage to property
Failure to observe this warning will lead to property damage.
.. Additional information symbols
NOTE
Useful information and notes
EN Country-specic function
Functions restricted to one or more countries are labelled with country codes in accordance with
ISO-.
.. Instructions symbols guide
Instructions
ඣPrerequisites before carrying out the following instructions (optional)
"Carry out step.
"(Additional steps, if applicable)
» Result of the step(s) (optional)
. Target group
All activities described in the document may only be carried out by specially trained personnel with the following
qualications:
• Knowledge about how an inverter functions and operates
• Training in the handling of hazards and risks during the installation and operation of electrical units and systems
• Education concerning the installation and startup of electrical units and systems
• Knowledge of applicable standards and directives
• Knowledge and adherence to this document with all safety notices.
 Safety
DANGER
Lethal voltages are still present in the terminals and cables of the inverter even after the
inverter has been switched o and disconnected.
Severe injuries or death will occur when touching the cables and terminals in the inverter.
Only appropriately qualied and authorised electricians may open, install or maintain the inverter.
›Keep the inverter closed when the unit is in operation.
›Do not touch the cables and/or terminals when switching the unit on and o.
›Do not make any modications to the inverter.
The electrician is responsible for observing all existing standards and regulations.
• Keep unauthorised persons away from the inverter and PV system.
• In particular, be sure to observe the standard IEC---: "Requirements for special installations or loca-
tions – solar photovoltaic (PV) power supply systems".
• Ensure operational safety by providing proper grounding, conductor dimensioning and appropriate protection
against short circuiting.

ENEN
Safety
Page  KACO Operating Instructions blueplanet . TL
• Observe all safety instructions on the inverter and in these operating instructions.
• Switch o all voltage sources and secure them against being inadvertently switched back on before performing
visual inspections and maintenance.
• When taking measurements while the inverter is live:
–Do not touch the electrical connections.
–Remove all jewellery from your wrists and ngers.
–Ensure that the testing equipment is in safe operating condition.
• Stand on an insulated surface when working on the inverter.
• Modications to the surroundings of the inverter must comply with the applicable national and local standards.
• When working on the PV generator, it is also necessary to switch o the DC voltage with the DC isolator switch in
addition to disconnecting the PV generator from the grid.
. Proper use
The inverter converts the DC voltage generated by the PV modules into AC voltage and feeds it into the grid. The
inverter is built according to the latest technological standards and safety regulations. Nevertheless, improper use
may cause lethal hazards for the operator or third parties, or may result in damage to the unit and other property.
Operate the inverter only with a permanent connection to the public power grid.
Any other or additional use of the device shall be regarded as improper. This includes:
• Mobile use,
• Use in rooms where there is a risk of explosion,
• Use in outdoor areas if the inverter is exposed to direct sunlight, rain or a storm
• Use in rooms where the humidity is higher than %
• Operation outside of the specications intended by the manufacturer
• Modifying the device
• Standalone operation.
. Protection features
The following monitoring and protection functions are built-in:
• Overvoltage conductors/varistors to protect the power semiconductors from high-energy transients on the grid
and generator side
• Temperature monitoring of the heat sink
• EMC lters to protect the inverter from high-frequency grid interference
• Grid-side grounded varistors to protect the inverter against burst and surge pulses
• Islanding detection according to the current standards.
. More information
NOTE
The EU Declaration of Conformity can be found in the appendix.
For information on grid coupling, grid protection and safety parameters along with more detailed
instructions see our web site at http://www.kaco-newenergy.de/.

EN
Description
KACO Operating Instructions blueplanet . TL Page 
 Description
. Mode of Operation
The inverter converts the DC voltage generated by the PV modules into AC voltage and feeds it into the grid. The
starting procedure begins when there is sucient sunlight and a specic minimum voltage is present in the inverter.
The feed-in process begins once the PV generator has passed the insulation test and the grid parameters are within
the requirements imposed by the grid operator for a specic monitoring time. If, as it gets dark, the voltage drops
below the minimum voltage value, feed-in operation ends and the inverter switches o.
. Diagram
1
2
3
4
5
6
Figure : Inverter diagram
Key
1 Housing with control panel 4 Connection board
2 Cover for the connection area 5 USB interface
3 DC isolator switch 6 Mounting plate
.. Mechanical components
DC isolator switch
The DC isolator switch is located on the bottom side of the inverter housing. The DC isolator switch is used to dis-
connect the inverter from the PV generator in order to carry out service.
Figure : DC isolator switch
Disconnecting the inverter from the PV generator
"Switch the DC isolator switches from  (ON) to  (OFF).
Connecting the inverter to the PV generator
"Switch the DC isolator switches from  (OFF) to  (ON).
.. Electrical functions
A potential-free relay contact is integrated in the inverter. Use this contact for one of the following functions:

ENEN
Description
Page  KACO Operating Instructions blueplanet . TL
Fault signal relay
The potential-free relay contact closes as soon as there is a fault during operation. You use this function, for example,
to signal a fault visually or acoustically.
Priwatt
The energy that is provided by the PV system can be put to use directly by the appliances that are connected in your
home.
The potential-free contact can switch larger appliances (e.g. air conditioning units) on and o with the“priwatt”
function activated. This requires an external power supply and an external load relay.
When the function is active, either the remaining runtime (in hours and minutes) or the shutdown threshold (in kW)
is displayed on the start screen depending on the operating mode selected. The“priwatt” function is not active in
the unit’s delivery state. The option can be congured in the Settings menu.
.. Interfaces
You congure the interfaces and the web server in the Settings menu.
The inverter has the following interfaces for communication and remote monitoring:
Ethernet interface
Monitoring can occur directly on the unit using the integrated Ethernet interface. A local web server is installed in
the unit for this purpose.
For monitoring a system comprising several inverters, we recommend you use an external data logging and moni-
toring system.
RS interface
In addition to the monitoring via the Ethernet interface, the monitoring can be executed via the RS interface. For
monitoring your PV system using the RS interface, KACO new energy GmbH oers monitoring devices:
USB interface
The USB connection of the inverter is a type A socket. It is located on the connection board on the underside of the
inverter under a cover. The USB connection is specied to draw mA of power. Use the USB interface to read out
stored operating data and to load software updates using a FAT-formatted USB stick.
“Inverter Off" input
If Powador protect is installed as a central grid and system protection, the fail-safe disconnection of suitable KACO
inverters from the public grid can be initiated by a digital signal instead of tie circuit-breakers. This requires the
inverters in the photovoltaic system to be connected to the Powador protect.
If a Powador-protect is used for fast shutdown, it must be used as grid protection. The RS interface is not
required for this.
Information on installation and use can be found in this manual, in the Powador protect manual and in the instruc-
tions for use of the Powador protect on the KACO web site.

EN
Description
KACO Operating Instructions blueplanet . TL Page 
.. Inverter as part of a PV system
KWhKWh
PV generator PV generator
Inverter with
DC isolator switch
Inverter with
DC isolator switch
Line protection Line protec-
tion
Load
Feed-in meterReference
counter
Selective
main switch
Grid connection point
Selective
main switch
Figure : Circuit diagram of a system with two inverters
Key Denition / Information about the connection
PV generator The PV generator, i.e. the PV modules, converts the radiant energy of sunlight into
electrical energy.
Inverter with:
- DC connection The PV generator is connected directly to the inverter's DC connection. Two strings
can be connected to the DC connection.
- DC isolator switch Use the DC isolator switch to disconnect the inverter from all power sources on the
PV generator side.
Circuit breaker A circuit breaker is an overcurrent protection device.
Feed-in meter The feed-in meter is to be specied and installed by the power supply company.
Some power supply companies also allow the installation of your own calibrated
meters.
Selective main switch The selective main switch is to be specied by the power supply company.

ENEN
Technical Data
Page  KACO Operating Instructions blueplanet . TL
 Technical Data
. Electrical data
Product name: KACO blueplanet 20.0 TL3
Input levels
Recommended power range of the generator [kW] 24
MPP@Pnom from [V] to [V] 550 ... 800
Operating range from [V] to [V] 200 ... 950
Starting voltage [V] * 250
No-load voltage (UOC max ) [V] 1,000 (start up to 1,000)
Max. input current [A] 2 x 18.8
Max. power per MPP tracker [W] 15,000
Number of strings 2 x 2
Number of MPP trackers 2
max. short-circuit current (ISC max ) [A] 22,4
max. input source feedback current [A] 0
Polarity safeguard Short-circuit diode
Output levels
Rated power [VA] 20000 @230 V
Grid voltage [V] 400/230 (3/N/PE)
380/220 (3/N/PE)
Rated current [A] 3 x 29
Contribution to peak short-circuit current [A] 56,76
Initial short-circuit alternating current (lk” rst
single period eective value) [A] 18.6
Start-up current [A] 4.52
Rated frequency [Hz] 50/60
cos phi 0.30 inductive ... 0.30 capacitive
Number of feed-in phases 3
Distortion factor (THD) [%] 2.22
General electrical data
Max. eciency [%] 97,9
European eciency [%] 97.6
Self consumption: night [W] 1.5
Feed-in starts at [W] 20
Circuit design Transformerless
Grid monitoring Country-specic
Table 1: Electrical data

EN
Technical Data
KACO Operating Instructions blueplanet . TL Page 
. Mechanical data
Product name: KACO blueplanet 20.0 TL3
Display Graphical LCD, 3 LEDs
Controls 4-way button, 2 buttons
Interfaces 1x Ethernet, USB, RS485, Error-Relais, 4x Digital output "Inverter o"
Fault signal relay Potential-free NO contact, 30 V / 1 A
AC connections: PCB terminal PCB terminals inside the unit (max. cross section: 16 mm²)
AC connections: Cable connection Cable connection via M40 cable tting
DC connections 8 (2 x 4) MC-4-compatible plug connections
Ethernet connection: Cable connection Cable connection via M25 cable tting
Ambient temperature range [°C] -25 ... +60, power derating from +40
Humidity range (non-condensing) [%] 0 ... 95
Maximum installation elevation
[m above sea level] 2,000
Temperature monitoring Yes
Cooling (free convection (K)/fan (L)) L
Protection rating according to EN 60529 IP65
Degree of contamination 2
Noise emission [dB(A)] <53
DC isolator switch Built-in
Housing Cast aluminium
H x W x D [mm] 690 x 420 x 200
Total weight [kg] 46.6
CE conformity Yes
Table 2: Mechanical data
* The DC starting voltage can be set in the menu if needed.
. Identication
Identifying the unit
ඣYou will nd the name plate with product-specic data for service and
other requirements specic to installation on the right side panel of
the inverter. This data includes:
• Product name
• Part no.
• Serial no.
• Date of manufacture
• Technical Data
• Disposal information
• Certication marking, CE marking.
KACO new energy
Carl-Zeiss-Straße 1
74172 Neckarsulm
Made in Germany
KACO blueplanet 20.0 TL3 M2 WM OD IIG0
Part number 1001453
Serial number 000000000xxxxxxxx Year Q3 / 16
Input Vmax PV / lsc PV (max) / Inom PV 1000 Vdc/ 2x 22,4 A/ 2x18,8 A
V-MPP at Pnom / V- range 550V-800V/200V-950V
Output
Nominal voltage
220 V / 380 V (3/N/PE)
230 V / 400 V (3/N/PE)
Voltage range continuous operation 184 - 264 V (Ph-N)
Current (maximum continuous) 3 x 29 A
Frequency range 42 Hz - 68 Hz
Output
Power
Snom at 220 V Unom 20000 VA
Snom at 230 V Unom 20000 VA
Reactive power cos phi 0-100 % Snom 1 - 0,3 ind/cap
Environ-
ment Temperature range - 25°C...+60°C
Protection class / Ingress protection I/IP65
ARC fault circuit protection none
Interface protection according to country
specific requirements, details see manual
No galvanic separation
Figure : Name plate

ENEN
Transportation and Delivery
Page  KACO Operating Instructions blueplanet . TL
 Transportation and Delivery
. Delivery
Every inverter leaves our factory in proper electrical and mechanical condition. Special packaging ensures that the
units are transported safely. The shipping company is responsible for any transport damage that occurs.
Scope of delivery
•  inverter
•  wall bracket
•  installation kit
•  set of documentation (DE, EN, quick start guide in other languages)
Checking your delivery
. Inspect your inverter thoroughly.
. Immediately notify the shipping company in case of the following:
–Damage to the packaging that indicates that the inverter may have been damaged
–Obvious damage to the inverter
. Send a damage report to the shipping company immediately.
The damage report must be received by the shipping company in writing within six days following receipt of the
inverter. We will be glad to help you if necessary.
. Transportation
CAUTION
Impact hazard, risk of breakage to the inverter
›Pack the inverter securely for transport.
›Carefully transport the inverter using the carrying handles of the packaging box.
›Do not subject the inverter to shocks.
For safe transportation of the inverter, use the holding openings in the carton.
Packaging
(folding cartons)
(H x W x D (mm))
Total weight [kg]
 x  x 

Figure : Transportation of the inverter Table 3: Dimensions and weight

EN
Mounting
KACO Operating Instructions blueplanet . TL Page 
 Mounting
DANGER
Risk of fatal injury from re or explosions
Fire caused by ammable or explosive materials in the vicinity of the inverter can lead to serious
injuries.
›Do not mount the inverter in an area at risk of explosion or in the vicinity of highly ammable mate-
rials.
Installation location
• As dry as possible, climate-controlled, the waste heat must be dissipated away from the inverter
• Unobstructed air circulation
• When installing the unit in a control cabinet, provide forced ventilation for sucient heat dissipation
• Access to the inverter must also be possible without additional tools
• For outdoor installation, t the inverters in such a way to ensure that they are protected against direct sunlight,
moisture - and dust penetration
• For easy operation, ensure during installation that the display is slightly below eye level.
Wall surface
• With sucient load-bearing capacity
• Accessible for installation and maintenance
• Made from heat-resistant material (up to  °C),
• Flame resistant
• Minimum clearances to be observed during assembly: see Figure  on page .
NOTE
Access by maintenance personnel for service
Any additional costs arising from unfavourable structural or mounting conditions shall be billed to
the customer.
CAUTION
Property damage due to gases that have an abrasive eect on surfaces when they come into
contact with ambient humidity caused by weather conditions.
The inverter housing can be severely damaged by gases (ammonia, sulphur, etc.) if it comes
into contact with ambient humidity caused by weather conditions.
If the inverter is exposed to gases, it must be mounted so that it can be seen at all times.
›Perform regular visual inspections.
›Immediately remove any moisture from the housing.
›Take care to ensure sucient ventilation of the inverter.
›Immediately remove dirt, especially on vents.
›Failure to observe these warnings may lead to inverter damage which is not covered by KACO’s
manufacturer warranty.
NOTE
Power reduction due to heat accumulation.
If the recommended minimum clearances are not observed, the inverter can go into power regula-
tion mode or protective shutdown due to insucient ventilation and the resulting heat buildup.
›Maintain minimum clearances.
›Provide for sucient heat dissipation.

ENEN
Mounting
Page  KACO Operating Instructions blueplanet . TL
<20°
Figure : Instructions for wall mounting Figure : Inverter for outdoor installation
CAUTION
Use suitable mounting parts.
›Use only the supplied mounting parts.
›Mount the inverter upright on a vertical wall only.
›For a free-standing mounting an incline of ° is allowed.
. Unpacking
CAUTION
The inverter is very heavy – risk of injury!
› Observe the weight of the inverter during transport.
› Select suitable mounting location and mounting base.
› Use mounting material corresponding to or included with the base for mounting the inverter.
› Transport and install the inverter with at least  persons.





Figure : Unpack inverter Figure : Lifting the inverter
Key
1 Carton 4 Centre of gravity of the inverter
2 Protective packaging 5 Positions for lifting
3 inverter 6 Protective covers

EN
Mounting
KACO Operating Instructions blueplanet . TL Page 
Unpack inverter
. Open carton at the front.
. Remove installation material and documentation.
. Slide the unit aside the housing out of the carton.
. Remove upper and lower protective packaging from housing.
. Place the protective packaging back into the carton.
. Lift the inverters to the intended positions (see Figure ).
» Continue mounting the inverter.
. Installing the unit
250mm
250mm
250mm
500 mm 500 mm
700 mm
700 mm
1
2
3
4
5
1386
405
260
565
1120
328
Figure : Minimum clearances/mounting plate Figure : Drilling separation (in mm)
Key
1 Fixings for mounting 4 Detachment protector
2 Wall bracket 5 Suspension brackets (back of housing)
3 Screws for mounting
Installing the mounting plate and the unit
. Mark the positions of the drill holes using the slots in the wall holder.
NOTE: The minimum clearances between two inverters, or the inverter and the ceiling/oor have already been
taken into account in the diagram.
. Fix mounting plate to the wall with the supplied mounting xtures.
Make sure that the mounting plate is oriented correctly.
. Hang the inverter on the wall holder using the suspension brackets on the back of the housing.
. Fix the inverter with the enclosed screws to the detachment protector at the connection area.
» The mounting of the inverter is complete. Continue with the installation.

ENEN
Electrical connection
Page  KACO Operating Instructions blueplanet . TL
Authorised electrician
 Electrical connection
DANGER
Lethal voltages are still present in the terminals and cables of the inverter even after the
inverter has been switched o and disconnected!
Severe injuries or death will occur when touching the cables and terminals in the inverter.
›Only appropriately qualied and authorised electricians may open and install the inverter.
›Observe all safety regulations and the current technical connection specications from the relevant
power supply company.
›The inverter must be mounted in a xed position before being connected electrically.
›Disconnect the AC and DC side.
›Secure the inverter against reconnection.
›Ensure that the AC and DC sides are completely voltage free.
. Preparing the AC connection
.. Open connection area
3

Figure : Connection area: Open connection cover
Key
1 Connection cover 3 Screws for mounting (short)
2 Screws for mounting (long)
Open connection area
ඣYou have mounted the inverter on the wall.
. Unscrew the four Torx screws on the front side of the connection cover (blue).
. Pull down the connection cover.
» Make the electrical connections.
NOTE
Remove only the connection cover (blue). Opening the housing cover (grey) will invalidate the
warranty.

EN
Electrical connection
KACO Operating Instructions blueplanet . TL Page 
Authorised electrician
.. Surveying the connection area
Make the connection to the PV generator via the plug connectors and the grid connection via the PCB terminals in
the connection area of the inverter.
3
2
15
4
Figure : Connection area: Electrical connection
Key
1 DC isolator switch 3 AC connection terminals
2 8 (2 x 4) MC4-compatible DC plug connector for
PV generator
4
5
Cable tting (M40) for AC connection
Cable ttings (M16) for housing ground connection
.. Cable and fuse requirements
NOTE
Select the following specications in accordance with the following master conditions:
- Country specic installation standards
- Line length
- Type of line installation
- Local temperatures
AC connection DC connection
Max. conductor cross-section without wire sleeves 16 mm² dependent on the plug
that is used
Max. conductor cross-section with wire sleeves 10 mm²
Length of insulation to be stripped o 18 mm
Table 4: Recommended conductor cross-section
AC connection DC connection
Overvoltage protection no
Overvoltage conductor (SPD) -
String fuses - To be provided externally
on-site
Combiner box - To be provided externally
on-site
Protection class 3 3
Overvoltage category III II
Fuse protection: gL safety fuses or comparable auto-
matic circuit breakers
- 32 A for 6.0 mm²
conductor cross-section
Table 5: Integrated and recommended protective devices

ENEN
Electrical connection
Page  KACO Operating Instructions blueplanet . TL
Authorised electrician
. Connection to the power grid
The power connection wires are connected on the right of the connection area (see Figure  on page ),
DANGER
Danger to life from electric shock!
Severe injury or death will result if the live connections are touched.
›Switch o all power sources to the inverter before you insert the grid power cable into the unit.
›Make sure that the device is isolated from the public power supply and the system power supply
before starting work.
NOTE
If the cable impedance is high (i.e. long grid-side cables), the voltage at the grid terminals of the
inverter will increase during feed-in to the grid. The inverter monitors this voltage. If it exceeds the
country-specic grid overvoltage limit value, the inverter switches o.
›Ensure that the conductor cross-sections are suciently large or that the cable lengths are su-
ciently short.
Making the grid connection
ඣUse cables with ve wires (L, L, L, N, PE).
. Unscrew the cable tting.
. Remove the outer cladding of the AC cables.
. Insert the AC cables through the cable tting into the connection area.
. Strip the insulation from the AC cables.
. Open the locks for the PCB terminals.
. Connect the cables in accordance with the label on the PCB terminals
(Figure  on page ).
. Close the locks for the PCB terminals.
. Check secure t of all connected cables.
. Tighten the cable tting.
PE
N
BU
L2
BK
L1
BN GNYE
L3
GY
» The inverter is now connected to the power grid. Figure : AC connection terminals
NOTE
An AC-side disconnection unit must be provided during the nal installation stage. This cut-o
mechanism must be installed so that it can be accessed at any time without obstruction.
NOTE
If a residual current circuit breaker is necessary due to the installation specication, a type A residual
current circuit breaker must be used.
If an A-type RCD is used, the insulation threshold value in the“parameter” menu must be over (>)
kOhm.
For questions regarding the appropriate type, please contact your installer or our KACO new energy
customer service.

EN
Electrical connection
KACO Operating Instructions blueplanet . TL Page 
Authorised electrician
. Preparing the DC connection
.. Conguring the DC plug connector
4
3
12
15
5
1
2
6
4
37
Figure : Insert wires Figure : Slide insert into sleeve Figure : Check fastening
Key
1 Wire for DC connection 5 cable tting
2 Spring 6 Contact plug
3 Insert 7 Coupling
4 Sleeve
Conguring the DC plug connector
NOTE: Before proceeding with the isolation ensure that you don't cut any individual wires.
. Isolate wire for DC connection by  mm.
. Insert isolated wire with twisted ends carefully up to the end stop.
NOTE: Wire ends must be visible in the spring.
. Close the spring so that the spring latches.
. Slide insert into sleeve.
. Tighten cable tting with the help of a  mm fork wrench applying a torque of  Nm.
. Join insert with contact plug.
. Check latch by lightly pulling on the coupling.
» Make the electrical connection.
NOTE
The permissible bending radius of at least x the cable diameter should be observed during installa-
tion. Excessive bending force may negatively impact the protection rating.
›All mechanical loads must be absorbed in front of the plug connection.
›Rigid adaptations are not permitted on DC plug connectors.
.. Checking the PV generator for a ground fault
DANGER
Danger to life from electric shock!
Severe injury or death will result if the live connections are touched. When there is solar radiation, DC
voltage will be present at the open ends of the DC cables.
›Only touch the PV generator cables on the insulation. Do not touch the exposed ends of the cables.
›Avoid short circuits.
›Do not connect any strings with a ground fault to the unit.

ENEN
Electrical connection
Page  KACO Operating Instructions blueplanet . TL
Authorised electrician
Checking the PV generator for a ground fault
. Determine the DC voltage between:
–protective earth (PE) and the positive cable of the PV generator
–protective earth (PE) and the negative cable of the PV generator
If stable voltages can be measured, there is a ground fault in the DC generator or its wiring. The ratio between the
measured voltages gives an indication as to the location of this fault.
. Rectify any faults before taking further measurements.
. Determine the electrical resistance between:
–protective earth (PE) and the positive cable of the PV generator
–protective earth (PE) and the negative cable of the PV generator
In addition, ensure that the PV generator has a total insulation resistance of more than . MOhm, since the
inverter will not feed in if the insulation resistance is too low.
. Rectify any faults before connecting the DC generator.
NOTE
The threshold value from which the insulation monitor reports a fault can be set in the "Parameter"
menu.
.. Designing the PV generator
NOTE
Connected PV modules must be dimensioned for the DC system voltage in accordance with IEC 
Class A, but at least for the value of the AC grid voltage
Pmax Irated max. MPP tracker ISC max. MPP tracker
MPP tracker < kW <18.8 A <22.4 A
. Connecting the PV generator
Connect the PV generator to the  DC positive and the  DC negative connection plugs on the underside of the
housing (see Figure  on page ). Note the wiring examples given below. The inverter detects these typical
congurations automatically. In individual cases, you need to set the selected DC connection after installation in the
menu.
DANGER
Risk of fatal injury due to contact voltages.
Removing the plug connection before disconnecting the inverter from the PV generator may lead to
injuries and damage the unit.
›During installation: Electrically disconnect the DC positive and DC negative from the protective
earth (PE).
›Remove the plug connector.
CAUTION
Damage to the device in case of faulty conguration of the DC connector.
A faulty conguration of the DC connector (polarity +/-) causes equipment damages in the DC
connection if it is connected permanently.
"Please check polarity (+/-) of the DC connector before connecting the DC generator
"The DC voltage must not exceed V at any time.