REFU REFUsol 08K User manual

Installation and Operating Manual
REFUsol 08K ... 23K
English
REFU Elektronik Gm H No. 982030, Version 02 2018-06

2 REFUsol 08K ... 23K REFU Elektronik Gm H
Copyright
© REFU Elektronik Gm H. All rights reserved.
This manual and the information included therein are the property of REFU Elektronik Gm H.
No part of this manual is to e reproduced or copied without the express written permission of REFU
Elektronik Gm H. Any unauthorized use of this manual is strictly for idden.
Changes may e made to specifications, descriptions and delivery information.
Pu lisher
REFU Elektronik Gm H, Marktstraße 185, D-72793 Pfullingen
Trademarks
REFUsol is a registered trademark.
All other trademarks or registered trademarks are the property of their respective owners.
Feed ack from Customers
If you have any questions or comments regarding this manual, please contact: [email protected].
Disclaimer and Limitation of Lia ility
REFU Elektronik Gm H assumes no lia ility in the event of damage as a consequence of the failure to
o serve the warning instructions in these operating instructions or of improper usage.
The operating, maintenance and safety instructions are to e read carefully prior to installation and
commissioning.
The installation, commissioning and safety-related check must e undertaken y a qualified electrician.
Error-free and safe operation of the device requires proper and professional transport, storage, assem ly,
and installation, as well as careful operation and maintenance.
Only accessories and spare parts approved y the manufacturer are permitted.
Technical modifications to the device are not permitted.
Adherence to the safety regulations and provisions of the country in which the inverter will e used are to e
o served.
For European countries, the valid EU guidelines are to e o served when using the inverter.
The environmental conditions, technical calculation data and connection conditions of the grid operator
given in the product documentation must e upheld.
The technical data, calculation, connection and installation conditions are to e derived from the product
documentation and must e o served under all circumstances.
No lia ility is assumed for damages in connection with force majeure and disaster situations.

REFU Elektronik Gm H REFUsol 08K ... 23K 3
Ta le of Contents
Copyright ............................................................................................................................................................... 2
Pu lisher ............................................................................................................................................................... 2
Trademarks ........................................................................................................................................................... 2
Feed ack from Customers ................................................................................................................................... 2
Disclaimer and Limitation of Lia ility .................................................................................................................. 2
Ta le of Contents .................................................................................................................................................. 3
1 A out this Installation and Operating Manual 6
1.1 Sym ols and Markup ............................................................................................................................... 6
1.2 Warning Notices ....................................................................................................................................... 6
1.2.1 Layout of a Warning Notice ................................................................................................................. 6
1.2.2 Categories of Warning Notices ........................................................................................................... 6
1.3 Information ............................................................................................................................................... 7
2 Safety Information 8
2.1 Intended Use ............................................................................................................................................ 8
2.2 Qualification of Personnel ....................................................................................................................... 8
2.3 Dangers Arising from Misuse ................................................................................................................. 9
2.4 Protection against Contact with Electrical Parts ................................................................................. 10
2.5 Protection against Contact with Hot Parts ........................................................................................... 10
2.6 Protection during Handling and Assem ly ........................................................................................... 11
2.7 Please Note Before Starting Up ............................................................................................................ 11
2.8 Additional Sym ols and Warning Notices on the Inverter ................................................................... 12
3 Description of Device 13
3.1 Infastructure Requirements.................................................................................................................. 13
3.2 Features of REFUsol 08K ... 23K ........................................................................................................... 14
3.3 External Dimensions ............................................................................................................................. 14
3.4 Block Diagram ....................................................................................................................................... 15
3.4.1 REFUsol 08K ... 23K ........................................................................................................................... 15
3.5 DC Connection ........................................................................................................................................ 15
3.6 Control Panel ......................................................................................................................................... 15
3.7 Internal Data Logger.............................................................................................................................. 16
4 Installation 17
4.1 Assem ly Site Requirements ................................................................................................................ 17
4.2 Transport ................................................................................................................................................ 18
4.3 Storage ................................................................................................................................................... 18
4.4 Checking scope of delivery .................................................................................................................... 19
4.5 Unpacking the Device ............................................................................................................................ 19
4.6 Installation ............................................................................................................................................. 20
4.7 Device connectors .................................................................................................................................. 21
4.8 Grounding ............................................................................................................................................... 22
4.9 Residual Current Protection ................................................................................................................. 22
4.10 Power Connection .................................................................................................................................. 22

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4.11 Power Supply Line ................................................................................................................................. 24
4.11.1 Fitting of supplied power plug ...................................................................................................... 24
4.12 Grid Line Impedance .............................................................................................................................. 26
4.13 DC connection PV generator ................................................................................................................. 27
4.13.1 DC-Connection ............................................................................................................................... 28
4.13.2 Connect PHOENIX CONTACT connector (SUNCLIX) .................................................................... 29
4.13.2.1 Connect ca le ............................................................................................................................ 29
4.13.2.2 Disconnect connector ............................................................................................................... 30
4.13.2.3 Remove ca le ............................................................................................................................ 30
4.14 Interface Port RS485 ............................................................................................................................. 31
4.15 Ethernet Interface Connection .............................................................................................................. 32
5 Commissioning 34
5.1 Turning on the Device ............................................................................................................................ 34
5.2 Setting the Country Code and the Menu Language ............................................................................. 34
5.2.1 Set Country Code/Grid Guideline ...................................................................................................... 35
5.2.2 Accepting the Country Code .............................................................................................................. 36
5.3 Device Start ............................................................................................................................................ 36
5.4 Control Panel ......................................................................................................................................... 37
5.5 Basic Screen .......................................................................................................................................... 37
5.6 Graphical Display ................................................................................................................................... 38
5.7 Energy Yield Data Display ...................................................................................................................... 38
5.8 Standardized Energy Yield Data Display ............................................................................................... 38
5.9 Input of Standardized Data .................................................................................................................... 39
5.10 Menu Structure ...................................................................................................................................... 39
6 Configuration 41
6.1 Changing the Menu Language .............................................................................................................. 41
6.2 Limitation of the Power Output ............................................................................................................. 41
6.3 Monitoring with REFUlog ...................................................................................................................... 42
6.4 REFUset – PC Configuration Tool ......................................................................................................... 42
6.5 Communication via Ethernet ................................................................................................................. 43
6.5.1 Automatic Setting via DHCP .............................................................................................................. 43
6.5.2 Manual Setting ................................................................................................................................... 43
6.6 Communication via RS485 ..................................................................................................................... 44
6.7 Portal Monitoring ................................................................................................................................... 44
6.8 Sending Config ....................................................................................................................................... 45
6.9 Portal Test Function .............................................................................................................................. 45
7 Trou leshooting 46
7.1 Self-Test – Error Message .................................................................................................................... 46
7.2 Transient Failure ................................................................................................................................... 46
7.3 Faults ...................................................................................................................................................... 46
7.4 Fault Acknowledgement ........................................................................................................................ 46
7.5 List of Error Messages .......................................................................................................................... 46

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8 Options 52
8.1 Irradiation and Temperature Sensor .................................................................................................... 52
8.1.1 Inverter Sensor Interface .................................................................................................................. 52
8.1.2 Sensor Type Si-13TC-T-K Ca le ....................................................................................................... 52
8.1.3 Assem ling of the Sensor Plug ......................................................................................................... 53
8.1.4 Connection of the Sensor at the Solar Inverter ............................................................................... 53
8.1.5 Configuration ..................................................................................................................................... 54
8.2 External Turn Off Signal ........................................................................................................................ 54
8.2.1 Overview ............................................................................................................................................. 54
8.2.2 Function .............................................................................................................................................. 55
8.2.3 Connections of the External Stop Signal (DRM 0) ............................................................................ 56
8.2.4 Configuration of the External Stop Signal (DRM 0) .......................................................................... 57
8.2.5 Attach the DRM 0 Sticker .................................................................................................................. 57
9 Maintenance 58
9.1 Maintain the Inverter ............................................................................................................................. 58
10 Decommissioning 59
10.1 Remove Inverter ..................................................................................................................................... 59
10.2 Disposal .................................................................................................................................................. 60
11 Technical data 61
11.1 Inverter ................................................................................................................................................... 61
11.2 Sensor..................................................................................................................................................... 62
12 Certificates 64
13 Contact 65

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1A out this Installation and Operating Manual
These operating instructions form part of the product.
Read the Installation and Operating Manual carefully efore installing and using the product.
Keep the operating instructions readily availa le with the device for the entire service life of the
product.
Provide all future users of the device access to the operating instructions.
1.1 Sym ols and Markup

Prerequisite
 One-step instruction
1. Multiple-step instruction
•
Bulleted list
Highlighting Highlighting within a text

Result
1.2 Warning Notices
1.2.1 Layout of a Warning Notice
SIGNALWORD / WARNING INSTRUCTIONS CATEGORY
Type and source of danger
Consequences if the warning is not o served
 Required action to avoid the risk
1.2.2 Categories of Warning Notices
DANGER
Leads directly to death or serious personal injury if ignored.
Follow the warnings to avoid death or serious injury!
WARNING
May result in death or serious personal injury if ignored.
Follow the warnings to avoid serious injuries!
CAUTION
May cause minor personal injury if ignored.
Follow the warnings to avoid injury!

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NOTICE
Can lead to property damage if ignored.
Follow the warnings to avoid damage or destruction of the product!
This sym ol represent important notes concerning potential harm to people, this
unit, or associated equipment.
1.3 Information
Note:
A notice descri es information which is important for the optimum and cost-
effective operation of the equipment.

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2Safety Information
2.1 Intended Use
The REFUsol 08K ... 23K inverter, also referred to in these operating instructions as the inverter, is a solar
inverter, which transforms the direct current generated y the PV generator (photovoltaic modules) into
alternating current and feeds this to the pu lic power supply network.
The inverter is manufactured according to the rules and current state of technology and takes into account
the valid EU, IEC and UL guidelines respectively.
The inverter fulfils the requirements according to protection class IP 65 / NEMA 4 and can e used indoors
and outdoors.
Any other use is not considered to e a designated use. The manufacturer accepts no lia ility for damages
resulting from this.
2.2 Qualification of Personnel
Target group for these instructions are professionals who can assess the assigned tasks due to their
professional training, knowledge and experience as well as knowledge of the relevant provisions and
recognize possi le dangers.
Electrical work must only e carried out y qualified electricians.
Only suita ly trained and qualified personnel are allowed to work on this inverter. Personnel are regarded as
eing qualified if they are sufficiently familiar with the assem ly, installation, and operation of the product as
well as with all warnings and safety measures set out in these operating instructions.

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2.3 Dangers Arising from Misuse
DANGER
Danger to life from electric shock
Device may only e installed and serviced
y qualified specialist technical
personnel.
Only class A modules according to IEC 61730 must e used.
The PV generator must e free of earth potential.
The PV generator must e designed in accordance with the technical data of
the inverter.
Before connecting or disconnecting the DC plug always open DC switch.
Every power supply line must e equipped with an appropriate AC-
disconnecting device.

A consumer must never e switched etween an inverter and line protection
switch.
Access to the shutdown mechanism must always e free.
Installation and commissioning must e carried out properly.
DANGER
Danger to life from electric shock
After the device has een switched off, the interior may still contain life-
threatening voltage
Do not open inverter.
Discharge time is at least 15 minutes.
DANGER
Danger to life from high discharge current

It is essential to ensure an earthing connection has een esta lished prior to
connection to the supply current circuit.

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2.4 Protection against Contact with Electrical Parts
DANGER
Danger to life, danger of injury due to high electrical voltage
Installation of the inverter must only e carried out y trained
specialist
personnel. In addition, the installer must e accredited y the responsi le
utility company.
General assem ly and safety stipulations relating to working
on high current
facilities must e followed.

Before switching on, a check must e made to ensure that the plugs are firmly
in place (locked).

Before plugging or unplugging the DC plug, always disconnect the connection
to the PV generator.

The feeder must e isolated and secured against eing switched on again
efore working at the AC grid.
2.5 Protection against Contact with Hot Parts
CAUTION
Danger of urns caused y hot surfaces on housings
At an am ient temperature of 45 °C, the upper part of the housing as well as the
refrigeration unit can reach a surface temperature of more than 75 °C.
Do not touch the housing surface near to heat sources.
Allow the device to cool down for 15 minutes efore touc
hing the surface of
the device.

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2.6 Protection during Handling and Assem ly
WARNING
Danger of injury during improper handling caused y crushing, shearing,
cutting, striking, and lifting
The weight of the inverter is 38.4 kg!
Follow the general setup and safety regulations for handling and assem ly.
Use suita le assem ly and transportation equipment.
Avoid trap and crush injuries y taking suita le precautions.
Only use suita le tools. Use special tools where this is prescri ed.
Use lifting equipment and tools in a technically correct manner.

If necessary, use suita le protective equipment (for example, goggles, safety
footwear, protective gloves).
Do not stand under hanging loads.
Remove any liquids onto the floor immediately to avoid the danger of slipping.
2.7 Please Note Before Starting Up
•In the event of installation in France, the device must e furnished with the warning sticker laid
down y UTE C 15-712-1. The warning stickers are included in delivery.
•Pro lem-free and safe operation of the inverter is conditional upon due and specialised
transportation, storage, assem ly and installation as well as careful operation and maintenance.
•Only use accessories and spare parts approved y the manufacturer.
•Adherence must e ensured to the prescriptions and stipulations regarding safety of the country in
which the inverter is to e used.
•The am ient conditions stated in the product documentation must e o served.
•Starting up is prohi ited until the entire system meets the national regulations and safety rules
regarding use.
•Operation is only permitted with adherence to the national EMC prescriptions for the present use
case.
•The manufacturer of the equipment or machine is responsi le for ensuring compliance with the
thresholds required y the respective national regulations.
•For European countries, the EU Directive 2014/30/EU (EMC Directive) is to e o served when using
the inverter.
•The technical data, connection and installation conditions are to e taken from the product
documentation and must e o served under all circumstances.
•Switching off of the inverter must first e effected on the AC side via the circuit reaker. Then the
inverter is to e switched off on the DC side, should maintenance work need to e carried out on the
DC side.
•It is not necessary to switch off the inverter overnight, as the inverter switches off completely as
soon as no DC voltage is present at the input. If no switch-off is effected, the inverter switches on
automatically in the morning when the PV generator supplies sufficiently high voltage. This means
that the maximum output is generated.

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2.8 Additional Sym ols and Warning Notices on the Inverter
Indication of PV system
General warning sign
Warning of electrical voltage
Hot surface! The housing can get hot during use.
This sym ol advises that the user hand ook must e read
efore the device is used.
The inverter must e earthed efore use.
Before eginning of work switch unit free of voltage.
Warning of electrical voltage on DC and AC side.
All solar strings on the DC side are at voltage.
Discharging time of the device longer than 15 minutes.

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3Description of Device
3.1 Infastructure Requirements
Additional required equipment 08K – 20K at the low voltage
network
23K at the medium voltage
network
AC load reak switch necessary necessary
Central grid protection device
(VDE-AR-N 4105)
only for systems a ove 30 kVA
required
only for systems a ove 30 kVA
required
Medium voltage transformer not necessary necessary
The following points are to e considered when planning the infrastructure:
•The 08K – 20K can only feed into the low-voltage grid.
•The 23K can only feed into the medium-voltage grid.
•The 5-wire power supply line must e equipped with an appropriate AC disconnecting device.
•The 23K is not equipped with internal potential isolation.
•If the inverters are connected with the medium-voltage-grid, it must e operated with electrically
isolating transformers.
•No other equipment may e connected etween the transformer and inverters.
The following standards and technical regulations are also to e o served:
IEC 60364-4-41 Protection: Protection against electric shock
IEC 60364-4-43 Protection for safety - Protection against overcurrent
IEC 60364-5-52 Selection and erection of electrical equipment - wiring systems
BDEW Technical Guidelines
VDN Technical Guidelines
For the 23K an isolating transformer with the following specifications is required:
Specification of medium voltage transformers 23K
Rated power 23 kVA
Rated voltage OS Electricity Utility
Rated voltage US 3 x 460 V PE + N
Frequency 50/60 Hz
Short-circuit voltage u
k
Electricity Utility
Switching group Dyn5 oder Dyn11
Protection Outdoor use IP65 or protected

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3.2 Features of REFUsol 08K ... 23K
The REFUsol 08K ... 23K is a transformer-less, three-phase solar inverter, which has a particularly high
efficiency at any operating point. Depending on type, it is suita le for connection of a PV generation with an
output of 8 kW to 23 kW. Heat is dissipated only e convection. An internal monitor prevents the device from
exceeding the permissi le am ient temperature. The inverter is designed such that the device does not have
to e opened for assem ly and connection work. All electrical connections are exclusively made with
locka le connectors. The device features an integrated DC isolating switch according to EN 60947-3, which
reduces the overall installation work. The inverter provides the usual communication interfaces RS485 and
Ethernet. An illuminated graphical display shows the development of the feed-in power and other operating
data in a clearly arranged manner. An 8-key control panel elow the display also provides excellent control
and navigation convenience. Based on its design in protection class IP 65, the inverter can e installed at an
outside location as long as it is not in direct sunlight. An installation protected against sunlight under the
solar modules is ideal here.
3.3 External Dimensions
535 mm
600 mm
277 mm
Fig. 1: External dimensions

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3.4 Block Diagram
3.4.1 REFUsol 08K ... 23K
Fig. 2: Block diagram REFUsol 08K ... 23K
1) DC overvoltage protection, type 3
2) AC overvoltage protection, type 3
3.5 DC Connection
Fig. 3: Connection diagram
3.6 Control Panel
The graphical user interface which is integrated on the front of the device and comprises 128 x 64 pixels can
e used to display the operation data, such as the feed-in power or yield. The parameters required are
selected and entered on the 8-key control panel. The control panel is illuminated when a key is pressed and
turns dark automatically.

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Fig. 4: Control panel
3.7 Internal Data Logger
The inverter features an internal data logger that allows measured values to e simultaneously recorded in
the form of parameters. If the storage capacity is full, the oldest data is overwritten. With the default setting
on delivery, the data logger logs 16 measuring channels, which can e displayed an analyzed y REFUlog.
Recording cycle Storage time
1 minute 2.5 years
2 minutes 5 years
5 minutes 12.5 years
10 minutes 25 years
Status LEDs

REFU Elektronik Gm H REFUsol 08K ... 23K 17
4Installation
4.1 Assem ly Site Requirements
DANGER
Danger to life due to fire or explosion
Do not install inverter in areas with risk of explosion.
Do not install inverter on flamma le materials. Uphold fire protection
class F30 according to DIN 4102 resp. the NFPA regulation
Do not install inverter in areas where easily flamma le materials are
stored.
Under no circumstances are the cooling fins of the heat sink to e covered.
WARNING
Danger of accident
When installing and servicing, unrestricted and safe access to the devices
must e ensured.
The following requirements of the installation site must e upheld:
•Only vertical installation is permitted as otherwise the cooling of the device cannot e guaranteed
(convection cooling).
•Do not su ject the inverter to any direct sunlight.
•A fixed wall or a metal construction is necessary for installation. The weight of an inverter is 38.4 kg.
Relevant construction regulations must e o served.
•The device is to e mounted at an appropriate distance from com usti le materials.
•Installation in non-ventilated ended ca inets and enclosures is not allowed ecause the unit in operation
emits heat.
•To allow for the heat dissipation required, keep the following minimum distances from the ceiling and
wall as well as from neigh ouring devices:

18 REFUsol 08K ... 23K REFU Elektronik Gm H
500 mm
50 mm 50 mm
500 mm
Fig. 5: Minimum distance
The device is est operated if the display is at eye level.
Protection class IP65 allows mounting in an outdoor area.
4.2 Transport
The devices must e transported under clean and dry conditions, if possi le in their original packaging. The
transport temperature must e etween -25 … +70 °C (-13 … 158 °F). Permissi le variations in temperature
may not exceed 20 °C (68 °F) per hour.
4.3 Storage
The devices must e stored in clean and dry premises, if possi le in their original packaging. The storage
temperature must e in the range of -25 … +55 °C (-13 … 131 °F). Permissi le variations in temperature may
not exceed 20 °C (68 °F) per hour.

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4.4 Checking scope of delivery
The scope of delivery includes:
•Solar Inverter REFUsol 08K ... 23K
•Wall-mounting racket
•Supplement with the following content:
o1x 5-pin contact insert, IP67, VC-TFS5-PEA for grid connection
o1x adapter housing IP67 VC-K-T3-R (10-25) PLOMB for grid connection
o2x cross-recessed flat-head screw, M5x20 => for mechanically securing the device in the wall
racket
o1x warning la el in according UTE C 15-712-1 for installing in France
The screws for attachment to the wall are not included.
The IP67 VC-K-T3-R (10-25) PLOMB adapter housing allows sealing.
4.5 Unpacking the Device
NOTICE
Exposure to moisture, dust, or de ris while unmounted in a non-vertical
orientation poses a risk of ingress
Only unpack the device when it is to e installed. Failure to do so voids your
warranty!
The inverters are heaviest at the top. They are therefore packed upside down to facilitate transport. You will
therefore see the ottom side of the device (connectors) after having opened the package. Take the device at
the two holding grips that are visi le on the side and remove it from the packaging. When eing unpacked,
the device keeps the packaging grid locked in place on its housing. The packaging grid can e used to
deposit the device on the floor. This prevents the cover from eing damaged.
Note:
The inverter contains electrolytic capacitors which can e stored for no more
than 1 year and at a storage temperature of ≤ 40 °C / ≤ 104 °F while in a de-
energized state. If the storage time has een exceeded, please contact REFU
Elektronik Gm H Service efore connecting the inverter to your system!

20 REFUsol 08K ... 23K REFU Elektronik Gm H
Fig. 6: Holding grip positions
4.6 Installation
Check the delivery efore installation (see page 19).
CAUTION
Danger of injury
Do not use the cover to hold the device. Only use the four holding grips to
move the device.
NOTICE
Danger of damage to property
When designing the attachment of the wall-mounting plate, take the product
weight of 38.4 kg into account.
Do not open device. Opening the device voids the warranty.
The inverter is mounted using the wall-mounting plate which is included in the scope of delivery.