Kaco blueplanet 3.0 NX1 M2 User manual

These instructions form part of the product and must be observed. They are available online on our website and correspond to the current
hardware version. The copyright for this documentation is held solely by KACO new energy GmbH.
Manual
English translation of German original
Authorised electrician
Important safety instructions
Android APP iOS APP Installation video
3.0-5.0 NX1
Start-up video via APP
KACO blueplanet 3.0 NX1 M2
KACO blueplanet 3.7 NX1 M2
KACO blueplanet 4.0 NX1 M2
KACO blueplanet 5.0 NX1 M2

Legal provisions
The information contained in this document is the property of KACO new energy GmbH. Publication, in whole or in part,
requires the written permission of KACO new energy GmbH.
KACO warranty
You can download the current warranty conditions from the Downloads folder on our website at http://www.kaco-
newenergy.com.
Definitions on product designations
In this manual, the product “Photovoltaic feed-in inverter” is referred to as the device for ease of reading.
Trademarks
All trademarks are recognised, even if not explicitly identified as such. A lack of identification does not mean that a product
or designation/logo is free of trademarks.
Software
This device contains open source software developed by third parties and in some cases licensed under GPL and/or LGPL.
More details on this topic and a list of the open source software used, as well as the corresponding licence texts, can be
found on the associated “KACO NX Setup” APP in the “Info” menu under “Imprint”, “Wi-Fi Stick Licences” and “Mobile APP
Licences”.

Photovoltaic feed-in inverter
Table of contents
1General information........................................ 1
1.1 Notes regarding this document.......................... 1
1.2 More information............................................... 1
1.3 Layout of Instructions......................................... 1
1.4 Target group....................................................... 2
1.5 Marking .............................................................. 3
2Safety .............................................................. 4
2.1 Intended use ...................................................... 4
2.2 Protection features ............................................ 5
3Description of the device................................. 6
3.1 Mode of operation ............................................. 6
3.2 System layout..................................................... 6
4Technical data ................................................. 7
4.1 Electrical data ..................................................... 7
4.2 General data....................................................... 8
4.3 Environmental data............................................ 8
4.4 Accessories ......................................................... 8
5Transportation and Delivery............................ 9
5.1 Scope of delivery ................................................ 9
5.2 Transporting the device ..................................... 9
5.3 Installation tool .................................................. 9
6Assembly and preparation............................. 10
6.1 Choosing the installation location.................... 10
6.2 Unpacking the device ....................................... 11
6.3 Fastening the mount ........................................ 12
6.4 Installing and securing the device .................... 13
7Installation .................................................... 14
7.1 General information......................................... 14
7.2 Surveying the connection area......................... 14
7.3 Making the electrical connection..................... 15
7.4 Connecting the device to the power grid......... 15
7.5 Connecting the PV generator to the device ..... 17
7.6 Creating equipotential bonding ....................... 20
7.7 Connecting the interfaces ................................ 20
7.8 Connecting the Smart-Meter for dynamic feed-in
.......................................................................... 21
8Commissioning .............................................. 23
8.1 Requirements ................................................... 23
8.2 Preconditions relating to standards ................. 23
9Configuration and operation ......................... 24
9.1 Start condition.................................................. 24
9.2 Initial start-up................................................... 24
9.3 Authorisation.................................................... 25
9.4 Operating system and system configuration.... 26
9.5 Signal elements ................................................ 27
9.6 Connecting to the device.................................. 28
9.7 Menu of the Communication unit.................... 31
9.8 Additional functions ......................................... 34
9.9 Menu of Inverter .............................................. 37
9.10 Operation mode ............................................... 38
9.11 Enabling functions............................................ 39
9.12 Performing a firmware update......................... 49
9.13 Monitoring with “blueplanet web” .................. 51
9.14 Monitoring the device ...................................... 52
9.15 Active power control with a Smart-Meter ....... 52
9.16 Information on dynamic feed-in ...................... 52
10 Maintenance and troubleshooting ................ 55
10.1 Visual inspection............................................... 55
10.2 Cleaning............................................................ 55
10.3 Shutting down for maintenance work /
troubleshooting................................................ 56
10.4 Troubleshooting ............................................... 57
10.5 Error code......................................................... 57
10.6 Fault during connection set-up and search...... 60
10.7 Disconnecting connections............................... 61
11 Decommissioning and dismantling ................ 62
11.1 Switching off the device ................................... 62
11.2 Uninstalling the device ..................................... 62
11.3 Disassembling the device ................................. 63
11.4 Packaging the device ........................................ 63
11.5 Storing the device............................................. 63
12 Disposal......................................................... 63
13 Service and warranty..................................... 63
14 Appendix ....................................................... 64
14.1 EU Declaration of Conformity .......................... 64

Page 1KACO blueplanet 25.0 NX3 M3 KACO blueplanet 30.0 NX3 M3 KACO blueplanet 33.0 NX3 M3
1General information
1.1 Notes regarding this document
WARNING
Improper handling of the device can be hazardous!
› You must read and understand the manual in order to 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 device, associated components and other parts of the system.
Some of the documents required for the registration and approval of your system are included with the manual.
Retention of documents
This manual and other document must be stored near the system and be available at all times.
 The current version of the manual can be downloaded from www.kaco-newenergy.com.
Original version
This document has been produced in several languages. The German version is the original version. All other language
versions are translations of the original version.
1.2 More information
Links to more detailed information can be found at www.kaco-newenergy.com.
Document title
Document type
Technical data sheet Product flyer
Dynamic feed-in limitation and blueplanet web
with/without data logger
Application Notes
Firmware package Zip file
SoftwareAutomatic update for iOS / Android app
EU Declaration of Conformity Certificates
Country-specific certificates - Certification for specific
subassemblies Certificates
1.3 Layout of Instructions
1.3.1 Symbols used
General hazard Fire and risk of explosion
Electrical voltage Risk of burns
Earthing - ground conductor

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1.3.2 Safety warnings symbols guide
DANGER
High risk
Failure to observe this warning will lead directly to serious injuries or even death.
WARNING
Potential risk
Failure to observe this warning may lead to serious injuries or even death.
CAUTION
Low-risk hazard
Failure to observe this warning will lead to minor or moderate injuries.
NOTE
Risk of property damage
Failure to observe this warning will lead to property damage.
1.3.3 Additional information symbols
NOTE
Useful information and notes
Information that is important for a specific topic or objective, but that is not safety-relevant.
1.3.4 Symbols for instructions
Prerequisite for use.
1 Perform next step
2 Additional action sequence
Interim result of the action
»End result
1.4 Target group
All activities described in the document may only be carried out by skilled personnel who have the following qualifications:
• Knowledge about how an inverter functions and operates.
• Training in the handling of hazards and risks during the installation and operation of electrical devices and systems.
• Education concerning the installation and start-up of electrical devices and systems.
• Knowledge of applicable standards and directives.
• Knowledge and adherence to this document with all safety notices.

Page 3 KACO blueplanet 3.0 NX1 M2 KACO blueplanet 3.7 NX1 M2 KACO blueplanet 4.0 NX1 M2 KACO blueplanet 5.0 NX1 M2
1.5 Marking
You will find the name plate with the following data for
service and other requirements specific to installation on
the right side panel of the product:
– Product name
– Part number
– Serial number
– Date of manufacture
– Technical details
– Disposal information
– Certification marking, CE marking.
Fig. 1.Name plate

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2Safety
DANGER
Lethal voltages are still present in the connections and cables of the device even after the device has
been switched off and disconnected!
Coming into contact with the lines and/or terminals/busbars in the device can cause serious injury or death.
› Do not open the device.
› The device must be mounted in a fixed position before being connected electrically.
Comply with all safety regulations and current technical connection specifications of the responsible
power supply company.
› The device is only permitted to be mounted, installed and commissioned by a qualified electrician.
› Switch off the grid voltage by turning off the external circuit breakers.
› Do not touch the cables and/or terminals/busbars when switching the device on and off.
› Check that all AC and DC cables are completely free of current using a clip-on ammeter.
The electrician is responsible for observing all existing standards and regulations. The following points must be taken into
account:
• Keep unauthorised persons away from the device and/or system.
• In particular, observe standard1“Requirements for special types of premises, rooms and installations - Solar
photovoltaic (PV) power supply systems” in the respective regionally applicable version
• Ensure operational safety by providing proper grounding, conductor dimensioning and appropriate protection against
short circuiting.
• Observe all safety instructions on the product and in these operating instructions
• Switch off all voltage sources and secure them against being inadvertently switched back on before performing visual
inspections and maintenance.
• When taking measurements on the live device:
–Do not touch the electrical connections
–Remove all jewellery from wrists and fingers
–Ensure that the testing equipment is in safe operating condition
• Modifications to the surroundings of the device must comply with the applicable national and local standards
2.1 Intended use
The device is a transformerless PV inverter which converts the direct current of the PV generator into grid-compatible single-
phase alternating current and then feeds the single-phase alternating current into the public power grid.
The device is built using state-of-the-art technology and in accordance with the recognized safety rules. Nevertheless,
improper use may cause lethal hazards for the operator or third parties, or may result in damage to the product and other
property.
The device is intended for indoor and outdoor applications and may only be used in countries for which it has been approved
or for which it has been released by KACO new energy and the grid operator.
Operate the device only with a permanent connection to the public power grid. The country and grid type selection must be
commensurate with the respective location and grid type.
The requirements of the grid operator must be met for grid connection to take place. The permission of the relevant
authorities may also be required in order to secure authorisation to connection to the grid.
The device may only be operated with PV arrays (PV modules and wiring) of protection class II pursuant to IEC 61730,
application class A.
The enclosed documentation is an integral part of the product. The documentation must be read, observed and stored in a
place which is freely accessible at all times.
1
Country
Standard
EU
Harmonised document - HD 60364-7-712 (European implementation
of the IEC standard)
The name plate must be permanently attached to the product.
Any other or additional use of the device shall be regarded as improper. This includes:

Page 5 KACO blueplanet 3.0 NX1 M2 KACO blueplanet 3.7 NX1 M2 KACO blueplanet 4.0 NX1 M2 KACO blueplanet 5.0 NX1 M2
• Use of a distribution system that is not described (grid type)
• Use of sources other than PV-strings
• Mobile use
• Use in rooms where there is a risk of explosion
• Use in direct sunlight, rain or a storm or other harsh environmental conditions
• Use in an outdoor area that does not meet the environmental conditions set down in Technical Data > Environmental
Data.
• Operation outside the specification intended by the manufacturer
• Overvoltage on the DC connection of over 580 V
• Modifying the device
• Standalone mode
2.2 Protection features
The following monitoring and protection functions are built-in:
• System for monitoring the device temperature
• EMC filters to protect the inverter from high-frequency grid interference
• Anti-islanding detection according to the current standards.
• Isolation detection / residual current monitoring and disconnection function to detect isolation faults

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3Description of the device
3.1 Mode of operation
The device converts the DC voltage generated by the PV-modules into AC voltage and feeds this into the power grid. The
starting procedure begins when there is sufficient sunlight and a specific minimum voltage is present in the device. 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 specific monitoring time. If, as it gets dark, the voltage drops below the minimum voltage
value, feed-in mode ends and the device switches off.
3.2 System layout
Fig. 2.Circuit diagram of a system with two inverters
Key Definition / information on the connection
PV generator
The PV generator converts the radiant energy of sunlight
into electrical energy.
Inverter
The PV generator is connected to the device’s DC
connection.
Line protection
The circuit breaker is an overcurrent protection device.
Feed-in meter
The feed-in meter is to be specified and installed by the
power supply company. Some power supply companies
also allow the installation of your own calibrated
counters.
Selective main switch
The selective main switch is to be specified by the power
supply company.
Reference counter
The reference counter is to be specified and installed by
the power supply company. This measures the amount of
energy drawn.
Integrated DC isolator switch
Use the integrated DC isolator switch to disconnect the
device from the PV generator.
KWhKWh
Inverter
Inverter
Load
Reference
counter
Grid monitoring point
Selective
main switch
PV generator PV generator
Feed-in meter
Line protection Line protection
Selective
main switch

Page 7 KACO blueplanet 3.0 NX1 M2 KACO blueplanet 3.7 NX1 M2 KACO blueplanet 4.0 NX1 M2 KACO blueplanet 5.0 NX1 M2
4Technical data
4.1 Electrical data
KACO blueplanet 3.0 NX1 M2 3.7 NX1 M2 4.0 NX1 M2 5.0 NX1 M2
DC Input levels
Recommended generator power range
3.0 kW
3.68 kW
4.0 kW
5.0 kW
MPP range at nominal power
140-480 V
165-480 V
180-480 V
220-480 V
Working range
80-550 V
Rated voltage
360 V
360 V
360 V
360 V
Starting voltage
80 V (PLC switch-on voltage, feed-in voltage is 100 V)
No-load voltage
580 V
Max. input current 2
2*12 A
Number of strings
2
Number of MPP controls
2
Max. short-circuit current (I
SC
max.)
2 x 18 A
Input source feedback current
0 A
Polarity safeguard
yes
String fuse
no
DC overvoltage protection
no
KACO blueplanet 3.0 NX1 M2 3.7 NX1 M2 4.0 NX1 M2 5.0 NX1 M2
AC Output levels
Nominal power
3 kVA
3.68 kVA
4 kVA
5 kVA
Rated voltage
230 V [3/N/PE]
Voltage range: continuous operation
180 V - 290 V
Rated current
13 A
16 A
17.4 A
21.7 A
Max. continuous current
15 A
16 A
20 A
22.7 A
Contribution to peak short-circuit
current ip
48 A
Initial short-circuit alternating current
(Ik" first single period effective value)
34 A
Make current
<20 % of the rated AC current for a maximum of 20 ms
Rated frequency
50/60 Hz
Frequency range
45 – 65 Hz
Reactive power
0 - 60 % Snom
cos-phi
0.8 inductive.... 0.8 capacitive
Number of feed-in phases
1
Distortion factor (THD)
<3%
Max. voltage range (up to 100 s)
295 V
AC overvoltage protection
no
2The “Max. input current” is the maximal theoretical value for operation with full power when the feed-in power is low.
The inverter switches to the maximum AC output power.
The “Max. short-circuit current (ISCmax.)” together with the open circuit voltage (UOCmax) defines the characteristic of the
connected PV generator. This is the relevant value for string design and represents the absolute maximum limit for
inverter protection. The connected PV generator must be designed in such a way that the maximum short-circuit current
is less than or equal to the ISCmax of the inverter under all foreseeable conditions. The design must in no case result in a
short-circuit current greater than the ISCmax of the inverter.

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4.2 General data
KACO blueplanet 3.0 NX1 M2 3.7 NX1 M2 4.0 NX1 M2 5.0 NX1 M2
Max. efficiency
97.5%
Europ. Efficiency
96.02%
96.33%
96.47%
96.70%
Self consumption: Standby
5 W
Feed-in from
60 W
Transformer unit
no
Protection class / over voltage
category
I / III (AC) II (DC)
Grid monitoring
Country-specific
Distribution system
TN-C-System, TN-C-S-System, TN-S-System, TT-System
Display
LED
Controls
no
Menu languages
DE, EN
Interfaces
Communication unit /
RS485 (e.g. smart meter) (optional)
Communication
WLAN
Radio technology
WLAN 802.11 b / g / n
Frequency spectrum
2,412 MHz - 2,472 MHz
Antenna gain
2 dBi
Potential-free relay
no
DC isolator switch
yes
AC isolator switch
no
Cooling
natural
Number of fans
no
Noise emission
< 25 dB(A)
Housing material
Aluminium
HxWxD
355 mm * 376 mm * 145 mm
Weight
11 kg
Certifications
Overview: see website / download area
4.3 Environmental data
KACO blueplanet 3.0 NX1 M2 3.7 NX1 M2 4.0 NX1 M2 5.0 NX1 M2
Installation height
3,000 m
Installation distance from coast
3,000 m
Ambient temperature
-25 °C …+60 °C
Power derating from
+40 °C
Protection rating (KACO installation
location)
IP65
Humidity range (non-condensing)
[%]
100%
4.4 Accessories
Accessory articles KACO order no.
NX1 smart meter connection kit
3015112
Eastron SDM230
3015113

Page 9 KACO blueplanet 3.0 NX1 M2 KACO blueplanet 3.7 NX1 M2 KACO blueplanet 4.0 NX1 M2 KACO blueplanet 5.0 NX1 M2
5Transportation and Delivery
Every product leaves our factory in perfect electrical and mechanical condition. Special packaging ensures that the devices
are transported safely. The shipping company is responsible for any transport damage that occurs.
5.1 Scope of delivery
Article
Description
Quantity
A
Inverter
1 piece
B
Wall mounting bracket
1 piece
C
Mounting accessory kit:
Wall fixings and hex bolts (3×)
M4×10 mm screw (4×)
1 set
D
DC plug connector
2 pairs
E
AC connector
1 piece
F
Communication device (WiFi stick)
1 piece
G
Documentation
1 set
A
B
C
D
E
F
G
Check the equipment included
-Inspect the device thoroughly.
-Immediately notify the shipping company in case of the following:
oDamage to the packaging that indicates that the device may have been damaged.
oObvious damage to the device.
-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 device. We will be glad to help you if necessary.
5.2 Transporting the device
CAUTION
Hazard due to impact; risk of breakage to the device!
Pack the device securely for transport.
Transport the device using the intended carrying handles of the packaging box.
Do not expose the device to any shocks.
5.3 Installation tool
The codes given in the table below are used in all usage instructions for assembly/installation/maintenance and
disassembly for the tools and tightening torques being used.
Code (s)
Shape of the connector
W
External hexagon
T
Torx
S
Slot
P
Phillips
Fig. 3.Form pattern

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6Assembly and preparation
6.1 Choosing the installation location
DANGER
Risk of fatal injury due to fire or explosions!
Fire caused by flammable or explosive materials in the vicinity of the device can lead to serious injuries.
Do not mount the inverter in an area at risk of explosion or in the vicinity of highly flammable materials
CAUTION
Property damage due to gases that have an abrasive effect on surfaces when they come into contact
with ambient humidity caused by weather conditions.
The device housing can be seriously damaged due to gases in combination with air humidity resulting from
weather conditions (e.g. ammonia, sulphur).
If the device is exposed to gases, the installation must be carried out at observable locations.
Perform regular visual inspections.
Immediately remove any moisture from the housing.
Ensure adequate ventilation at the installation location.
Immediately remove dirt, especially on vents.
Failure to follow these warnings may result in damage to the device that is not covered by the
manufacturer’s warranty.
NOTE
Access by maintenance personnel for service
Any additional costs arising from unfavourable structural or installation conditions will be billed to the
customer.
Installation space
-As dry as possible, climate-controlled. The waste heat must be dissipated away from the device
-Unobstructed air circulation
-When installing the device in a control cabinet, provide forced ventilation for sufficient heat dissipation
-Close to the ground, accessible from the front and sides without requiring additional resources
-In outdoor areas, protected on all sides from direct weather exposure and sunlight (thermal heating). Implementation
where necessary via constructional measures, e.g. wind breaks
-Make sure that the inverter is installed out of the reach of children.
-To ensure an optimal operation and a long service life, the temperature of the installation environment of the inverter
should be ≤40 °C.
Installation surface
-Must have adequate load-bearing capacity
-Must be accessible for installation and maintenance
-Must be made of heat-resistant material (up to 90 °C)
-Must be flame resistant
-Minimum clearances to be observed during installation [see Fig. 9 on Page 12]

Page 11 KACO blueplanet 3.0 NX1 M2 KACO blueplanet 3.7 NX1 M2 KACO blueplanet 4.0 NX1 M2 KACO blueplanet 5.0 NX1 M2
6.2 Unpacking the device
CAUTION
Risk of injury due to excessive physical strain
Lifting the device, for transport, relocation and assembly can result in injuries (e.g. back injuries).
› Only lift the device using the grip recesses provided.
Key
1 Packaging box
3 Protective packaging
2 Device
4 Grip recesses
The device has been transported to the installation site.
1. Loosen packaging tape from cardboard box.
2. Open carton at the front.
3. Remove installation material and documentation.
4. Pull up top protective packaging to remove.
5. Remove device from the packaging.
6. Place the protective packaging back into the packaging box.
7. Lift the device at the intended positions.
»Continue installing the mount.
Fig. 4.Device for outdoor installation
Fig. 5.Permissible installation location
Fig. 6.Unpacking the device
Fig. 7.Lift the unit
4

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6.3 Fastening the mount
CAUTION
Hazard when using unsuitable fixing materials!
If unsuitable fixing materials are used, the device could fall and persons in front of the device may be
seriously injured.
› Use only fixing materials that are suitable for the mounting base. The fastening materials supplied are
only suitable for masonry and concrete.
› Only install the device in an upright position.
NOTE
Power reduction due to heat accumulation!
If the recommended minimum clearances are not observed, the device may go into power regulation mode
due to insufficient ventilation and the resulting heat build-up.
› Observe minimum clearances and provide for sufficient heat dissipation.
› All objects on the device housing must be removed during operation.
› Ensure that no foreign bodies prevent heat dissipation following device installation.
Key
1 Drill three holes [Ø 10 mm depth 70 mm] 5 Screw for securing purposes
2 Insert screws and anchors A Minimum clearance: 300 mm
3 Take out the wall bracket B Minimum clearance: 500 mm
4 Install the wall holder
C Minimum clearance: 500 mm
Cardboard packaging with mount and mounting kit removed from the packaging and opened.
1. Mark the mounting position on the wall surface according to the position of the mount plate by drawing three
marks.
2. Mark the positions of the drill holes and drill three holes.
NOTE: The minimum clearances between two devices, or the device and the ceiling or floor have already been
taken into account in the diagram.
3. Fix the mount to the wall using suitable mounting fixtures from the mounting kit [ W-10].
NOTE: Make sure that the mount is oriented correctly.
»Proceed with the installation of the device.
Fig. 8.Drill holes for wall mounting
Fig. 9.Mounting the wall bracket

Page 13 KACO blueplanet 3.0 NX1 M2 KACO blueplanet 3.7 NX1 M2 KACO blueplanet 4.0 NX1 M2 KACO blueplanet 5.0 NX1 M2
6.4 Installing and securing the device
CAUTION
Risk of injury from improper lifting and transport.
If the device is lifted improperly, it can tilt and result in a fall.
› Always lift the device vertically using the openings provided.
› Use a climbing aid for the chosen installation height.
› Wear protective gloves and safety shoes when lifting and lowering the device.
Lifting and installing the device
The mount has been installed.
1. Lift the device using the recesses. Observe the centre of gravity!
2. Fit the device onto the mounting bracket. Check both sides of the heat sink to ensure that it is securely in place.
3. Insert the screw provided into the lug of the mount and secure the device to prevent it from being lifted off. [ P /
2 Nm]
NOTE: At this point, the screw described above can be replaced by a special screw as anti-theft protection.
»Device is installed. Proceed with the electrical installation.
Fig. 10.Mount the inverter to the wall bracket
Fig. 11.Check the device is secure
Fig. 12.Secure the inverter

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CAUTION
Property damage as a result of condensation
During pre-assembly of the device, moisture can enter the internal space via the DC connectors and the
dust-proof screw connections. The resulting condensate can cause damage to the device during
installation and start-up.
-Keep the device closed during pre-assembly and do not open the connection area until you
perform installation.
-Seal off any plug-in connections and screw fittings using sealing covers.
-Immediately remove any moisture from the housing.
7Installation
7.1 General information
DANGER
Lethal voltages are still present in the connections and cables of the device even after the device has
been switched off and disconnected!
Coming into contact with the lines and/or terminals/busbars in the device can cause serious injury or
death.
› Do not open the device.
› The device must be mounted in a fixed position before being connected electrically.
› Comply with all safety regulations and current technical connection specifications of the responsible
power supply company.
› Switch off the grid voltage by turning off the external circuit breakers.
› Check that all AC and DC cables are completely free of current using a clip-on ammeter.
› Do not touch the cables and/or terminals/busbars when switching the device on and off.
7.2 Surveying the connection area
The connection for the AC supply is located on the housing in the lower right area. The DC input source is connected to the
DC plugs and DC sockets on the base plate.
A DC integrated isolator switch
D
Housing grounding
B DC connector for PV generator
E
AC connection socket
C Connection for Communication unit
Fig. 13.Surveying the connection area

Page 15 KACO blueplanet 3.0 NX1 M2 KACO blueplanet 3.7 NX1 M2 KACO blueplanet 4.0 NX1 M2 KACO blueplanet 5.0 NX1 M2
7.3 Making the electrical connection
NOTE
Select conductor cross-section, safety type and safety value in accordance with the following basic
conditions:
Country-specific installation standards; power rating of the device; cable length; type of cable installation;
local temperature
7.3.1 Requirement for supply lines and fuse
DC-side
Max. outer diameter 5 – 8 mm
Max. cable cross-section (with wire sleeves) 2.5 - 6 mm² (DC plug connector)
Recommended cable type Solar cable
AC-side
Max. conductor cross-section
4 - 6.0 mm²
Max. outer diameter (with wire sleeves)
10 - 16 mm
Length of insulation to be stripped off
13 mm
Type of connection
Vaconn AC connector
Fuse protection for installation provided by customer Max 25 A at 6 mm²
Tightening torque 1.4 Nm
Communication
Recommended RS485 bus cable LiYCYv (twisted pair) black for laying cable outside and in
the ground, 2 x 0.5 mm²
LiYCY (twisted pair) grey for dry and damp indoor spaces,
2 x 0.5 mm²
7.4 Connecting the device to the power grid
7.4.1 Configuring the AC connection plug
You have completed assembly.
1. Slide the cable fitting over the cable.
2. Select seal according to cable diameter used.
3. Slide the housing and seal over the cable.
4. Remove the insulation from the cable. [sl. 53 mm]
5. Shorten the wires N, L by 2 mm more than the PE conductor.
6. Strip the wires N, L, PE by 13 mm.
7. Flexible wires must be fitted with wire sleeves in accordance with DIN 46228.
8. Insert wires into the contacts in accordance with the markings on the contact carrier.
9. Tighten screws on contact carrier. [ T_8 / 2.0 Nm]
10. Press contact carriers into the housing with an audible "click".
11. Fix the housing and tighten the cable screw fitting. [ W_29 / 3.5 Nm]
»Make the electrical connections.
Fig. 14.AC connection plug
Fig. 15.Connect wires

KACO blueplanet 3.0 NX1 M2, KACO blueplanet 3.7 NX1 M2, KACO blueplanet 4.0 NX1 M2, KACO blueplanet 5.0 NX1 M2 Page 16
Key
1
Cable fitting
A
External diameter (φ10 to 16 mm)
2Seal
B
Conductor cross-section (4 to 6 mm²)
3
Housing
C
Stripping length of the insulated cables (approx. 13 mm)
4 Contact carrier
D
Stripping
length of the outer sheath of AC cable (approx. 53 mm)
7.4.2 Make AC connection
AC connection plug configured correctly.
Fig. 18.Engage the AC connector with the device
connector
1. Insert the AC connection plug into the device connector
on the device.

NOTE: The AC connection is secure when an audible
click is heard.
2. Lay the cables correctly and in accordance with the
following rules:
– Lay the cables around the device with a minimum
clearance of 20 cm
– Never lay cables over semiconductors (cooling bodies).
– Excessive bending force may negatively impact the
protection rating. Lay the cables with a bending radius of
at least 4 times the cable diameter.
»The device is connected to the power grid.
NOTE
An AC-side disconnection unit must be provided during the final installation stage. This disconnector
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 specification, a type A residual
current circuit breaker must be used.
For questions regarding the appropriate type, please contact the installer or our KACO new energy
customer service.
NOTE
When the line resistance is high, i.e. long cables on the grid side, the voltage at the grid terminals of the
device will increase in feed-in mode. If the voltage exceeds the country-specific grid overvoltage limit value,
the device switches off.
Ensure that the cable cross-sections are sufficiently large or that the cable lengths are sufficiently short.
Fig. 16.Crimp wire sleeve to the contact
Fig. 17.Tighten the cable screw fitting

Page 17 KACO blueplanet 3.0 NX1 M2 KACO blueplanet 3.7 NX1 M2 KACO blueplanet 4.0 NX1 M2 KACO blueplanet 5.0 NX1 M2
7.5 Connecting the PV generator to the device
7.5.1 Configuring the DC connector
DANGER
Risk of fatal injury due to electric shock!
Coming into contact with live connections can cause serious injury or death. When there is sunlight present
on the PV generator, there is DC voltage on the open ends of the DC cables.
› Make sure that PV modules have good insulation against ground.
› On the coldest day based on statistical records, the max. open-circuit voltage of the PV modules must
not exceed the max. input voltage of the inverter.
› Check the polarity of DC cables.
› Ensure that the device is completely free of DC voltage.
› Do not disconnect DC connectors under load.
Legend
1
Wire for DC connection
5
Cable fitting
2
Spring
6
Contact plug
3
Insert
7
Coupling
4
Sleeve
Connection area opened.
NOTE: Before proceeding with the isolation ensure that you do not cut any individual wires.
1. Insert isolated wires with twisted ends carefully up to the connection.
NOTE: Wire ends must be visible in the spring.
2. Close the spring in such a way that the spring latches.
3. Slide insert into sleeve.
4. Secure and tighten the cable fitting [ W_15/ 1.8 Nm].
5. Join insert with contact plug.
6. Check latch by lightly pulling on the coupling.
»Make the electrical connections
NOTE
The permissible bending radius of at least 4x the cable diameter should be observed during installation.
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.
Fig. 19.Insert wires
Fig. 20.Slide insert into sleeve
Fig. 21.Check fastening