REFU REFUsol 08K, REFUsol 10K, REFUsol 13K, REFUsol 23K-MV, REFUsol 17K Installation And Operating Manual

...

Download

Installation and Operating Manual

REFUsol 08K ... 23K

English

REFU Elektronik GmbH No. 982030, Version 02 2018-06

2 REFUsol 08K ... 23K REFU Elektronik GmbH

This manual and the information included therein are the property of REFU Elektronik GmbH.

No part of this manual is to be reproduced or copied without the express written permission of REFU Elektronik GmbH. Any unauthorized use of this manual is strictly forbidden.

Changes may be made to specifications, descriptions and delivery information.

Publisher

REFU Elektronik GmbH, Marktstraße 185, D-72793 Pfullingen

Trademarks

REFUsol is a registered trademark.

All other trademarks or registered trademarks are the property of their respective owners.

Feedback from Customers

If you have any questions or comments regarding this manual, please contact: info@refu.com.

Disclaimer and Limitation of Liability

REFU Elektronik GmbH assumes no liability in the event of damage as a consequence of the failure to observe the warning instructions in these operating instructions or of improper usage.

The operating, maintenance and safety instructions are to be read carefully prior to installation and commissioning.

The installation, commissioning and safety-related check must be undertaken by a qualified electrician.

Error-free and safe operation of the device requires proper and professional transport, storage, assembly, and installation, as well as careful operation and maintenance.

Only accessories and spare parts approved by 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 be used are to be observed.

For European countries, the valid EU guidelines are to be observed when using the inverter.

The environmental conditions, technical calculation data and connection conditions of the grid operator given in the product documentation must be upheld.

The technical data, calculation, connection and installation conditions are to be derived from the product documentation and must be observed under all circumstances.

No liability is assumed for damages in connection with force majeure and disaster situations.

REFU Elektronik GmbH REFUsol 08K ... 23K 3

Table of Contents

Copyright ............................................................................................................................................................... 2

Publisher ............................................................................................................................................................... 2

Trademarks ........................................................................................................................................................... 2

Feedback from Customers ................................................................................................................................... 2

Disclaimer and Limitation of Liability .................................................................................................................. 2

Table of Contents .................................................................................................................................................. 3

About this Installation and Operating Manual 6

1.1 Symbols 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

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 Assembly ........................................................................................... 11

2.7 Please Note Before Starting Up ............................................................................................................ 11

2.8 Additional Symbols and Warning Notices on the Inverter ................................................................... 12

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

Installation 17

4.1 Assembly 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

4 REFUsol 08K ... 23K REFU Elektronik GmbH

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 cable ............................................................................................................................ 29

4.13.2.2 Disconnect connector ............................................................................................................... 30

4.13.2.3 Remove cable ............................................................................................................................ 30

4.14 Interface Port RS485 ............................................................................................................................. 31

4.15 Ethernet Interface Connection .............................................................................................................. 32

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

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

Troubleshooting 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

REFU Elektronik GmbH REFUsol 08K ... 23K 5

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 Cable ....................................................................................................... 52

8.1.3 Assembling 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

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

6 REFUsol 08K ... 23K REFU Elektronik GmbH

About this Installation and Operating Manual

These operating instructions form part of the product.

 Read the Installation and Operating Manual carefully before installing and using the product.

 Keep the operating instructions readily available 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

Symbols 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

SIGNAL WOR D / WARNING I NST RUCTIONS CA TEG ORY

Type and source of danger Consequences if the warning is not observed  Required action to avoid the risk

1.2.2 Categories of Warning Notices

DAN GER

Leads directly to death or serious personal injury if ignored. Follow the warnings to avoid death or serious injury!

WAR NIN G

May result in death or serious personal injury if ignored. Follow the warnings to avoid serious injuries!

CAU TIO N

May cause minor personal injury if ignored. Follow the warnings to avoid injury!

REFU Elektronik GmbH REFUsol 08K ... 23K 7

NOTIC E

Can lead to property damage if ignored. Follow the warnings to avoid damage or destruction of the product!

This symbol represent important notes concerning potential harm to people, this unit, or associated equipment.

1.3

Information

Note:

notice

describes information which is important for the optimum and cost-

effective operation of the equipment.

8 REFUsol 08K ... 23K REFU Elektronik GmbH

Safety 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 by the PV generator (photovoltaic modules) into alternating current and feeds this to the public 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 be used indoors and outdoors.

Any other use is not considered to be a designated use. The manufacturer accepts no liability 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 possible dangers.

Electrical work must only be carried out by qualified electricians.

Only suitably trained and qualified personnel are allowed to work on this inverter. Personnel are regarded as being qualified if they are sufficiently familiar with the assembly, installation, and operation of the product as well as with all warnings and safety measures set out in these operating instructions.

REFU Elektronik GmbH REFUsol 08K ... 23K 9

2.3

Dangers Arising from Misuse

DAN GER

Danger to life from electric shock

 Device may only be installed and serviced

by qualified specialist technical

personnel.

 Only class A modules according to IEC 61730 must be used.

 The PV generator must be free of earth potential.

 The PV generator must be 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 be equipped with an appropriate AC-

disconnecting device.



A consumer must never be switched between an inverter and line protection

switch.

 Access to the shutdown mechanism must always be free.

 Installation and commissioning must be carried out properly.

DAN GER

Danger to life from electric shock

After the device has been switched off, the interior may still contain lifethreatening voltage

 Do not open inverter.

 Discharge time is at least 15 minutes.

DAN GER

Danger to life from high discharge current



It is essential to ensure an earthing connection has been established prior to

connection to the supply current circuit.

10 REFUsol 08K ... 23K REFU Elektronik GmbH

2.4

Protection against Contact with Electrical Parts

DAN GER

Danger to life, danger of injury due to high electrical voltage

 Installation of the inverter must only be carried out by trained

specialist

personnel. In addition, the installer must be accredited by the responsible

utility company.

 General assembly and safety stipulations relating to working

on high current

facilities must be followed.



Before switching on, a check must be 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 be isolated and secured against being switched on again

before working at the AC grid.

2.5

Protection against Contact with Hot Parts

CAU TIO N

Danger of burns caused by hot surfaces on housings

At an ambient 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 before touc

hing the surface of

the device.

REFU Elektronik GmbH REFUsol 08K ... 23K 11

2.6

Protection during Handling and Assembly

WAR NIN G

Danger of injury during improper handling caused by 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 assembly.

 Use suitable assembly and transportation equipment.

 Avoid trap and crush injuries by taking suitable precautions.

 Only use suitable tools. Use special tools where this is prescribed.

 Use lifting equipment and tools in a technically correct manner.



If necessary, use suitable 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 be furnished with the warning sticker laid

down by UTE C 15-712-1. The warning stickers are included in delivery.

• Problem-free and safe operation of the inverter is conditional upon due and specialised

transportation, storage, assembly and installation as well as careful operation and maintenance.

• Only use accessories and spare parts approved by the manufacturer.

• Adherence must be ensured to the prescriptions and stipulations regarding safety of the country in

which the inverter is to be used.

• The ambient conditions stated in the product documentation must be observed.

• Starting up is prohibited 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 responsible for ensuring compliance with the

thresholds required by the respective national regulations.

• For European countries, the EU Directive 2014/30/EU (EMC Directive) is to be observed when using

the inverter.

• The technical data, connection and installation conditions are to be taken from the product

documentation and must be observed under all circumstances.

• Switching off of the inverter must first be effected on the AC side via the circuit breaker. Then the

inverter is to be switched off on the DC side, should maintenance work need to be 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.

12 REFUsol 08K ... 23K REFU Elektronik GmbH

2.8

Additional Symbols 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 symbol advises that the user handbook must be read before the device is used.

The inverter must be earthed before use.

Before beginning 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.

REFU Elektronik GmbH REFUsol 08K ... 23K 13

Description of Device

3.1

Infastructure Requirements

Additional required equipment

08K – 20K at the low voltage network

23K at the medium voltage network

AC load break switch necessary necessary

Central grid protection device (VDE-AR-N 4105)

only for systems above 30 kVA required

Medium voltage transformer not necessary necessary

The following points are to be 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 be 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 be operated with electrically

isolating transformers.

• No other equipment may be connected between the transformer and inverters.

The following standards and technical regulations are also to be observed:

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 uk Electricity Utility

Switching group Dyn5 oder Dyn11

Protection Outdoor use IP65 or protected

14 REFUsol 08K ... 23K REFU Elektronik GmbH

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 suitable for connection of a PV generation with an output of 8 kW to 23 kW. Heat is dissipated only be convection. An internal monitor prevents the device from exceeding the permissible ambient temperature. The inverter is designed such that the device does not have to be opened for assembly and connection work. All electrical connections are exclusively made with lockable 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 below the display also provides excellent control and navigation convenience. Based on its design in protection class IP 65, the inverter can be 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

REFU Elektronik GmbH REFUsol 08K ... 23K 15

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 be 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.

16 REFUsol 08K ... 23K REFU Elektronik GmbH

Fig. 4: Control panel

3.7

Internal Data Logger

The inverter features an internal data logger that allows measured values to be 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 be displayed an analyzed by 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 GmbH REFUsol 08K ... 23K 17

Installation

4.1

Assembly Site Requirements

DAN GER

Danger to life due to fire or explosion

 Do not install inverter in areas with risk of explosion.

 Do not install inverter on flammable materials. Uphold fire protection

class F30 according to DIN 4102 resp. the NFPA regulation

 Do not install inverter in areas where easily flammable materials are

stored.

 Under no circumstances are the cooling fins of the heat sink to be covered.

WAR NIN G

Danger of accident

 When installing and servicing, unrestricted and safe access to the devices

must be ensured.

The following requirements of the installation site must be upheld:

• Only vertical installation is permitted as otherwise the cooling of the device cannot be guaranteed

(convection cooling).

• Do not subject 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 be observed.

• The device is to be mounted at an appropriate distance from combustible materials.

• Installation in non-ventilated ended cabinets and enclosures is not allowed because 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 neighbouring devices:

18 REFUsol 08K ... 23K REFU Elektronik GmbH

500 mm

50 mm 50 mm

500 mm

Fig. 5: Minimum distance

The device is best operated if the display is at eye level.

Protection class IP65 allows mounting in an outdoor area.

4.2

Transport

The devices must be transported under clean and dry conditions, if possible in their original packaging. The transport temperature must be between -25 … +70 °C (-13 … 158 °F). Permissible variations in temperature may not exceed 20 °C (68 °F) per hour.

4.3

Storage

The devices must be stored in clean and dry premises, if possible in their original packaging. The storage temperature must be in the range of

-25 … +55

°C (-13 … 131 °F). Permissible variations in temperature may

not exceed 20 °C (68 °F) per hour.

REFU Elektronik GmbH REFUsol 08K ... 23K 19

4.4

Checking scope of delivery

The scope of delivery includes:

• Solar Inverter REFUsol 08K ... 23K

• Wall-mounting bracket

• Supplement with the following content:

o 1x 5-pin contact insert, IP67, VC-TFS5-PEA for grid connection

o 1x adapter housing IP67 VC-K-T3-R (10-25) PLOMB for grid connection

o 2x cross-recessed flat-head screw, M5x20 => for mechanically securing the device in the wall

bracket

o 1x warning label 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

NOTIC E

Exposure to moisture, dust, or debris while unmounted in a non-vertical orientation poses a risk of ingress

 Only unpack the device when it is to be 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 bottom side of the device (connectors) after having opened the package. Take the device at the two holding grips that are visible on the side and remove it from the packaging. When being unpacked, the device keeps the packaging grid locked in place on its housing. The packaging grid can be used to deposit the device on the floor. This prevents the cover from being damaged.

Note:

The inverter contains electrolytic capacitors which can be stored for no more than 1 year and at a storage temperature of ≤ 40 °C / ≤ 104 °F while in a deenergized state. If the storage time has been exceeded, please contact REFU Elektronik GmbH Service before connecting the inverter to your system!

20 REFUsol 08K ... 23K REFU Elektronik GmbH

Fig. 6: Holding grip positions

4.6

Installation

Check the delivery before installation (see page 19).

CAU TIO N

Danger of injury

 Do not use the cover to hold the device. Only use the four holding grips to

move the device.

NOTIC E

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.

REFU Elektronik GmbH REFUsol 08K ... 23K 21

364 mm

76 mm

90 mm

315 mm

Fig. 7: Mounting the inverter

1. Use the wall bracket to mark the positions of the holes to be drilled.

2. Attach the mounting plate to the wall with the outer holes. The screws for attachment to the wall are not included. Screws with a diameter of 6 mm must be used.

3. Push the cooling fins of the inverter into the tabs of the wall mounting plate. Push the inverter upwards until it stops. Place the lower edge of the cooler onto the wall holder. Ensure that the rib profile is locked behind the nuts.

4. Secure the inverter in these nuts using the enclosed screws (M5x20). As an alternative, you can also use a padlock (shackle 4 mm in diameter) to protect the inverter against theft. The design of the wall bracket ensures that the inverter is automatically centered in this bracket.

5. In order to avoid adhesive residue on the display, remove the display protection immediately after installation.

4.7

Device connectors

The following figure shows the connectors of the inverter on its bottom side.

Fig. 8: Device connectors REFUsol 08K ... 23K

The inverter is provided with the following connectors, as seen from left to right, top to bottom:

• 6 pair of PV generator connections

• RS485 connectors (IN and OUT)

• SENSOR (connection: Irradiation and temperature sensor, external shutdown signal)

22 REFUsol 08K ... 23K REFU Elektronik GmbH

• Ethernet interface port

• Power connection

4.8

Grounding

DAN GER

Danger to life from electric shock

 The inverter must be earthed with the grounding bolt, otherwise a potential

difference can build up, causing a risk of electric shock!

The inverter features a threaded bolt below the power supply port on the connection side for additional grounding. Grounding is intended to comply with the EMC requirements and to ensure optimum overvoltage protection. The ground wire cross-section must be bigger than the cross-section of the power supply line. In addition, ensure that the ground wire is placed as far away from and not directly in parallel to the power supply line.

The maximum permissible torque for this screw is 10 Nm / 7 ft lbs.

Fig. 9: Grounding bolt

4.9

Residual Current Protection

4.10 Power Connection

DAN GER

Risk of electric shock and fire caused by high discharge current

 Before connecting the device to the supply circuit, establish a ground -

connection by means of the labelled ground stud!

Note:

The photovoltaic power supply inverters without transformers meet the fault protection requirements according to IEC 60364-7-712 and CEI 64-8/7 can be operated with a type A residual-current circuit breaker. The rated leakage current should be at least 300 mA per inverter.

REFU Elektronik GmbH REFUsol 08K ... 23K 23

The following mains systems are allowed:

• TN-C-Net

• TN-C-S-Net

• TN-S-Net

The connection to the power supply must be via a 5-wire line. For safety reasons, the PE protective conductor must always be connected.

The power supply line must be equipped with an appropriate line protection. More information regarding the power connection you will find in the Technical Data, page 61.

Always observe the following standards:

IEC 60364-4-41

Protective measures: protection against electric shock

IEC 60364-4-43

Protection for safety: protection against overcurrent

IEC 60364-5-52

Low-voltage electrical installations: selection and erection of electrical equipment

The respectively national standards are to be upheld.

The following specifications of the local grid operator are to be observed:

• Pertinent technical and special regulations

• Installation approval must be in place

• Check the line voltage. It must be within the technical data for that device. If the line voltage is

higher, contact your local network operator.

• The AC side must not be measured by inserting test probes into the AC plug, because this will damage the plug contacts.

Note:

To ensure the IP65 protection class, only use the male and female connectors provided and connect them according to the connector manufacturer's mounting instructions. To prevent any penetration of moisture and dirt, unused inputs and outputs must be properly closed. Failure to do so could void your warranty!

Note:

When using wire end ferrules with isolating collar, make sure you do not introduce the insulation of the wire end ferrule into the clamping area of the terminal.

24 REFUsol 08K ... 23K REFU Elektronik GmbH

4.11 Power Supply Line

Fig. 10: Power Connection

Select the cross-section of the power supply line such that line losses are as low as possible. However, observe the following points:

• the installer must select the cable material according to the operation mode (installation location and

laying type) and the national regulations.

• Due to the construction, the recommended feed line for all cross-sections is a fine wire.

• Copper wires must be used.

• Rigid wires are not recommended for the use of 16 mm

cables.

• The wires are to be installed in the correct position in order to minimise lateral forces on the net

connection. The lateral forces must not exceed 250 N.

• The seal is run through a hole in the screw (below the screw head of the adapter housing) and the opening

provided and attached to the housing of the device.

The following table shows the maximum wire lengths upon use of a REFUsol 08K ... 23K depending on the cable cross section with a voltage drop below 1 %:

Line cross section 6.0 mm² 10.0 mm

16.0 mm

Max. line length 30 m 50 m 70 m

4.11.1 Fitting of supplied power plug

The cable fitting of the standard connector housing supplied allows 5 x 6 mm² to 5 x 16 mm² cables to be connected. The maximum outside diameter of the power supply line may be 30.3 mm (e.g. Lapptherm 145, 5 x 6 mm²).

1. Bend cable into position.

2. Strip the cable as shown in the illustration.

Note:

In order to ensure IP65 protection, the AC connection housing supplied must be used.

REFU Elektronik GmbH REFUsol 08K ... 23K 25

Fig. 11: Preparation of plug cable

3. Screw in plug.

4. Note torque specification according to illustration.

Fig. 12: Screw in plug

5. Determine diameter.

6. Seal connection.

26 REFUsol 08K ... 23K REFU Elektronik GmbH

Fig. 13: Diameter

4.12 Grid Line Impedance

For better efficiency, large line cross-sections in single cables are increasingly used for power supply lines, especially if local conditions require long supply lines.

In large-scale plants, it is recommended as a best practice to locate the inverters in close proximity to the step-up transformer. If the inverters are located in a decentralized fashion, with long distances to the transformer, the higher AC cable inductance can lead to increasing line impedances. This can lead to voltage distortions and error messages with regards to:

• Grid overvoltage (long cable)

• Increased operating noise of the inverters (short cable)

To avoid these disadvantageous conditions, twisted lines should be used for power supply if possible. If laying of twisted lines is not possible, the following requirements must be met for single cores:

• Lay single cores next to each other.

• It is not allowed to lay single cores in closed, magnetically conducting materials (e.g., sheet steel

pipe).

• If laid in open cable ducts, single cores should be laid such that the spacings between them are as small as possible.

Minimum spacing between single cores!

REFU Elektronik GmbH REFUsol 08K ... 23K 27

4.13 DC connection PV generator

DAN GER

Danger to life due to high voltages from active PV strings

Before connecting the PV strings, connect the inverter to the power supply network and to the ground bolt to ensure that the device is

safely connected to the protective conductor. The connection of the PV strings to the inverter or the CombinerBox can only take place

without voltage

Live PV strings can be under lethal voltages.

The maximum allowable voltage of 25 A per DC block must be upheld. The maximum DC voltage via all inputs must under no circumstances be exceeded.

• The DC connection is effected with Sunclix-plugs and sockets. More information seesee “DC-Connection”,

p. 28.

• Before connecting the PV strings an isolation measurement must be taken. Whenever it is switched on,

the inverter automatically checks the insulation of the PV generator. If the isolation is defective, the inverter switches off automatically. The inverter can only be started once the PV generator isolation error has been removed.

• Be absolutely sure to verify proper polarity when connecting the PV strings. Any inappropriate connection

of individual strings may damage the PV generator.

Protect the connectors such that they cannot be pulled off inadvertently.

The PV generator may not exceed the following operational characteristics under any circumstances!

Device type REFUsol 08K ... 23K

Max. DC voltage at each input (USC) 1000 V

Max. voltage per DC block (DC1/DC2) 25 A

Max. DC current via all DC inputs see “Technical data”, p. 61

Note:

To avoid unnecessary loss of energy yield, the sum total of the resistive and inductive voltage drop on the power supply line at nominal load should not exceed 1 % of the line voltage.

Note:

Do not ground the positive or negative pole of the PV generator. Otherwise, the modules may experience a loss of power

28 REFUsol 08K ... 23K REFU Elektronik GmbH

NOTIC E

Reverse currents are fault currents that occur in PV systems comprising parallel strings. Given short circuits of individual modules or cells in a module, the open

circuit voltage of the string in question can drop so far that the intact parallel strings

will drive a reverse current through the defective string. This may result in significant heating and therefore to destruction of the string.

What is more, the reverse current may cause secondary damage.

As no separation of the strings takes place within the inverter, each string must be separately protected by a

string fuse connected in series with the other string fuses.

In the event of a failure, this isolates the string from the intact strings so that destruction is prevented.

4.13.1 DC-Connection

Please note the following information (plug type, cross section) regarding the DC power cable:

Designation Type

Art. No. PHOENIX CONTACT

Art. No.

Outer Diameter

Cable Cross Section

Connectors + PV-CM-S 2.5-6 (-) 1774687

922006

5 – 8 mm 4 – 6 mm²

Connectors - PV-CF-S 2.5-6 (+) 1774674 5 – 8 mm 4 – 6 mm²

PV-C PROTECTION CAP 1785430 922007

If necessary, the following photovoltaic Y distributors may be used:

Type Art. No. PHOENIX CONTACT

PV-YC 6/ 1-0,12-SO3 (-/++) 1787726

PV-YC 6/ 1-0,12-SO3 (+/--) 1787739

For the adjustment of MC4 to Sunclix use the following adapter cable:

Type Art. No. Art No. PHOENIX CONTACT

PV-AS-MC4/6-150-MN-SET 922008 1704982

NOTIC E

In order to ensure IP65 protection, plug connectors and power supply connection

cables must be matched to each other and all unused connectors shall be fitted with

blanking plugs. Only the original components by PHOENIX CONTACT can be used! Failure to do so could void your warranty!

REFU Elektronik GmbH REFUsol 08K ... 23K 29

4.13.2 Connect PHOENIX CONTACT connector (SUNCLIX)

DAN GER

Danger to life due to high voltages from active PV strings

 The SUNCLIX connectors are only to be connected by electrotechnically

trained personnel.

 Never connect or disconnect SUNCLIX connectors when under load.

CAU TIO N

Danger of injury or damage to property

 Only use the SUNCLIX connectors together with a PV1-F type 2.5-6 mm2

solar

cable or UL-certified solar cable (ZKLA stranded copper wire, AWG 10-14). A safe electrical connection is only guaranteed with this cable. Further cable types can be requested from PHOENIX CONTACT.

 When laying the solar cable, observe the bend radii specified by the

manufacturer.

 Only connect the connectors to other SUNCLIX connectors.

 When connecting, always observe the specifications for rated voltage and

rated current. The smallest mutual value is valid.

 Protect the connector against moisture and dirt.

 Do not submerge the connectors under water.

 Do not lay the plug directly on the roofing.

 Protect unplugged connectors with a protective cap (e.g. PV-C PROTECTION

CAP, 1785430).

4.13.2.1 Connect cable

1. Strip the cable by 15 mm with a suitable tool. Ensure no individual strands are cut off.

2. Carefully add stripped conductors with drilled bunched conductors until impact. The bunched conductor ends must be visible in the spring.

3. Close spring. Ensure that the spring is locked in place.

4. Push insert into the barrel.

5. Tighten the cable screws with 2 Nm.

6. Bring together plug and bush. The connection latches.

7. By pulling the coupler, check the correct connection.

30 REFUsol 08K ... 23K REFU Elektronik GmbH

Fig. 14: Connect cable

4.13.2.2 Disconnect connector

A slit screwdriver is required with 3 mm wide blade (e.g. SZF 1-0,6X3,5, 1204517).

1. Enter screwdriver as demonstrated in picture below.

2. Leave screwdriver attached and separate bush and plug from one another.

Fig. 15: Disconnect connector

4.13.2.3 Remove cable

1. Unscrew cable screwing.

2. Enter screwdriver as demonstrated in picture below.

3. Pry open connection and separate barrel and insert from one another.

4. Open spring with screwdriver. Remove cable.

REFU Elektronik GmbH REFUsol 08K ... 23K 31

Fig. 16: Remove cable

4.14 Interface Port RS485

The RS485 interface supports the USS (Universal Serial Interface Protocol) and Modbus/Sunspec protocols, which can be used for transmission of data, for example, to a data logger of a remote monitoring system.

Portal

Data Logger /

Park C ontro l

Ethernet

RS 485 + RS 485 - Re f. 4 43 32 2 4 43 32 4

Bus termination

13 22 432

Inverter 1

Inverter 2 Inverter n

Fig. 17: Standard interface

When using this interface, please note that each device using the bus requires a unique address.

The bus termination is made by means of wire jumpers on RS485 OUT to the last bus user (inverter “n”).

Signal

Pin 1

(only used for termination)

Pin 2

RS485 +

Pin 3

RS485 -

Pin 4

Reference

32 REFUsol 08K ... 23K REFU Elektronik GmbH

Fig. 18: Connector M12 x 1 straight, shielded; pole arrangement:male M12, 4 pins, A-coded, view of male connector side

NOTIC E

In order to ensure IP 65 protection and the required and declared conformity with the domestic EMC standard a PHOENIX CONTACT type M12MS SACC-4SC SH plug and a shielded cable must be used. The outer diameter of the connecting cable can be max. 8 mm. Failure to observe this can lead to damage to the inverter and therefore void the warranty.

NOTIC E

Component damage and communication malfunctions Reversing the RS485 connecting cables and sensor cables results in defects and

malfunctions. If inverters are connected in series, a reversed RS485 can damage further connected inverters.



Make sure that each of the RS485 connection plugs is connected with the

RS485 receptacle intended for it.



If the connectors are reversed, correctly plug the RS485 connecting cables

immediately.

4.15 Ethernet Interface Connection

The Ethernet interface supports Modbus TCP/IP protocol, and is Sunspec compliant, which can be used for transmission of data, for example, to a data logger of a remote monitoring system. Daisy-chaining of devices is not supported. Each inverter must be connected to an ethernet switch, in parallel.

Please use an Ethernet cable with S/FTP design (shielded foiled twisted pair) and Phoenix Contact plug type Quickon VS-08-RJ45-5-Q/IP67.

REFU Elektronik GmbH REFUsol 08K ... 23K 33

Ethernet

Inverter 1

Inverter 2 Inverter n

Eth2 Eth3 ... Eth n

Ethernet Ethernet Ethernet

Fig. 19: Ethernet interface

NOTIC E

In order to ensure IP 65 protection, the plug type mentioned above must be used. Failure to observe this can lead to damage to the inverter and therefore void the warranty.

34 REFUsol 08K ... 23K REFU Elektronik GmbH

Commissioning

Before commissioning the inverter, be sure the following steps have been completed:

 Confirm the correct power supply connection  Confirm the correct connection of PV strings  Confirm that connectors are protected such that they cannot be pulled off inadvertently

DAN GER

Danger to life from electric shock

 Before switching on the device, check whether the plugs are securely

fitted (locked).

Do not pull off the connectors of the PV generator before you have met the following requirements:

 Make the power supply line absent of voltage.  Make the device absent of voltage using DC circuit breaker.  Check that the DC cables of the PV generator are de-energized.  Protect the voltage supply from being reactivated

DAN GER

Risk of electric shock and fire caused by high discharge current.

 Before connecting the device to the supply circuit, establish a ground

connection.

5.1

Turning on the Device

1. Verify that the device is connected to line voltage. If not, insert the external power fuse or turn on the

circuit breaker.

2. Apply voltage by turning on the DC switch. The inverter only starts if there is sufficient voltage available

from the PV panels.

5.2

Setting the Country Code and the Menu Language

When switching on for the first time an initial configuration is necessary.

The country code defines the country-specific grid monitoring parameters. The menu language is automatically set when the country code is selected. The menu language can subsequently be selected as

Note:

The control panel, including its status indicators, display, and operator keys, is only active when the PV generator is supplying sufficiently high voltage.

REFU Elektronik GmbH REFUsol 08K ... 23K 35

desired at any time, independent of the country abbreviation set in the menu. The country code is not set on delivery.

NOTIC E

The selected country code can only be changed by service personnel.

After the initial setting and confirmation of the country code the country code can only be altered within 40 hours. This is also valid for replacement devices. The country code can then only be changed by authorized service personnel.

NOTIC E

Cancellation of the operating license!

Operating the inverter with the wrong country code can lead to the

withdrawal of the

interconnection agreement from the energy supplier. We assume no liability for the consequences of an incorrectly set country code!

5.2.1 Set Country Code/Grid Guideline

The following window appears on the display after initial switch on of the DC voltage and prompts you to set the country code. You can choose from among the offered countries.

1. Use the and keys to select the country code which is specific for your country and your location. The menu language is selected simultaneously with the country code. However, the menu language can later be changed independently of the country code.

2. Press OK to confirm. Then the grid feed guideline given by the energy supplier must be selected.

3. Select valid grid feed guideline with and buttons.

4. Press

to confirm.

Estonia

France Germany Greece Hungary India

Germany

VDE 0126

AR-N 4105

MSR

36 REFUsol 08K ... 23K REFU Elektronik GmbH

5.2.2 Accepting the Country Code

To be certain, you will be asked whether you wish to accept the country code. After accepting the country code it can only be changed within 40 hours.

Only confirm the country code if you are absolutely sure it is correct.

If you are not sure, press

ESC

to cancel your selection and correct the selection.

If the country code is to be accepted, then confirm with OK.

A restart then takes place:

 "ERROR" and "GROUND FAULT" status LEDs flash red alternately.

5.3

Device Start

 Solar modules are irradiated with sufficient sunlight.  Country code is set.  Time and date is set.

The following procedure follows:

Self-test All status LEDs are lit for approx. 6 seconds

Check “START” status LED lights orange.

Activation “START” status LED lights orange/LED “ON” flashes green.

Feed in “ON” status LED lights green/normally all other status LEDs are off.

Set Country to AR-N 4105 ?

Cancel

PAC

8260

VAC 405 V VDC 634 V E day 27.6 kWh

Reboot

Menue

REFU Elektronik GmbH REFUsol 08K ... 23K 37

5.4

Control Panel

Fig. 20: Control panel with status LEDs, display and keys

Displays the Menu

In basic display: Reboot of display

“Energy / x kWp” display: Input of standardized (normalized) data

Function in the menu: Navigation within the menu level (previous menu, next menu). Function while parameters are edited: digit to the left, digit to the right (decade jump)

Selection within the menu.

ESC

Acknowledge failures and exit from menu level, exit from input menu without entering data

Confirm the selected menu (next menu level) and entered data.

5.5

Basic Screen

Fig. 21: Operating mode display

PAC

8260

VAC 405 V VDC 634 V E day 27.6 kWh

Feeding

Menue

Status LEDs

38 REFUsol 08K ... 23K REFU Elektronik GmbH

PAC = Current feed power in Watts (W)

VAC = Line voltage in Volts (V)

VDC = Solar cell voltage in Volts (V)

E day = Energy yield of the day in kWh

5.6

Graphical Display

Press the arrow key once to display the development of the day's feed power.

Fig. 22: “Today's” feed power display

Press the arrow key to display the development of the previous days.

Press the

ESC

key to return to the basic screen display.

5.7

Energy Yield Data Display

Press the arrow key to display the current yield data and the operating hours having currently elapsed.

Fig. 23: Energy yield absolute display

5.8

Standardized Energy Yield Data Display

Press the arrow key, then the arrow key to display the development of standardized energy yield data.

kW 01

3.2017

36kWh

0 5 10 15 20 c|k

Energy absolute

Day : 0.7 kWh Month : 5.3 kWh Year : 49.2 kWh Total : 265.8 kWh Oper. hr : 16.1 h

REFU Elektronik GmbH REFUsol 08K ... 23K 39

Fig. 24: Energy yield normalized on the display

Press the

ESC

key to return to the basic screen display.

5.9

Input of Standardized Data

To change the normalization, press the F2 key and enter the currently connected PV generator power as follows:

keys: Press the key to select the digits before the point.

Press the key to select the digits after the point.

key: Press the key to increment the selected digit by 1.

key: Press the key to decrement the selected digit by 1.

Fig. 25: Standardized data input display

Press the OK key to apply the set value.

Press the

ESC

key to discard the value and display the previous “normalized yield” level.

Press the F1 key to display the menu.

5.10 Menu Structure

The menu structure serves as a support to change to the individual information displays and setting displays.

Energy

/ x kWp

Day : 0.7 kWh Month : 5.3 kWh Year : 49.2 kWh Total : 265.8 kWh

Installed PV [kWp]

40 REFUsol 08K ... 23K REFU Elektronik GmbH

Energy absolute

Energy normalized

Analysis

Actual values Failure memory Configuration Device Information

AC Sensors

Country

Power Languages Limitation PAC Communication Date / Time Portal settings

Overview

Version number Country Current language Ethernet

Activation

Send configuration Portal Testfunction

Ethernet

RS485

Norm Factor

REFU Elektronik GmbH REFUsol 08K ... 23K 41

Configuration

6.1

Changing the Menu Language

The language selection has no effect on the country code. Proceed as follows to change the menu language:

1. Press F1 to open the menu.

2. Use the and keys to select the fourth menu item “Configuration”.

3. Press OK to confirm.

4. Use the and keys to select the first menu item “Languages”.

5. Press OK to confirm.

6. Use the and keys to select the desired menu language.

7. Press OK to confirm.

 The menu switches to the selected language. The display is initially empty.

8. Press

ESC

to return to the menu.

6.2

Limitation of the Power Output

Proceed as follows in order to limit the power output of the inverter:

1. Using the F1 key, select the menu item “Configuration” and confirm with the OK key.

2. Select the sub-menu “PAC Limit” and confirm with the OK key.

3. Enter the invert power output as percentage of the nominal power and confirm with the OK key.

 The power limit is immediately applied.

Analysis

Actual values Failure memory

Configuration

Device information

Menue

Configuration

Country Power

Languages Limitation PAC Communication Date / Time

Menue

42 REFUsol 08K ... 23K REFU Elektronik GmbH

6.3

Monitoring with REFUlog

The REFUsol 08K ... 23K inverter can be connected to the monitoring portal REFUlog using direct Ethernet connection to the internet, or via RS485 and the REFUcontrol data-gateway.

Once an internet connection is established, the inverter will automatically start to send data to REFUlog every 5 minutes. The sending interval can be changed with the configuration tool REFUset.

To view the inverter data, open www.refu-log.com with your browser and login or register as a new user.

You can use the activation code provided on the type label of the inverter to assign one or more inverter to a PV system.

6.4

REFUset – PC Configuration Tool

You can upgrade the firmware of the inverters and change country-specific parameters of the inverter with the PC Software REFUset. You can connect the PC with the inverters via Ethernet or USB using a RS485-USB converter.

For extended settings, you will receive a personal password on request from the REFU Elektronik GmbH Service.

Functions

• Firmware update

• Export of inverter data

• Feed-in conditions voltage and frequency

• Ramp starting time in the event of a grid error

• Average voltage monitoring

• Phase conductor voltage monitoring

• Frequency-dependent power reduction

• Actual voltage monitoring (rapid disconnection)

• Actual frequency monitoring

• Reactive power (cos φ)

REFU Elektronik GmbH REFUsol 08K ... 23K 43

• Power-up time

• K factor (fault ride through)

REFUset can be downloaded from www.refu.com.

6.5

Communication via Ethernet

The settings for the Ethernet communication can take place either manually or automatically (via DHCP). Manually is the default setting.

6.5.1 Automatic Setting via DHCP

1. Navigate to Menu

Configuration > Communication > Ethernet > DHCP

2. Enter “1” in DHCP input field.

3. Press OK to confirm.

4. Restart inverter by opening and re-closing the DC switch.

 The settings for IP address, subnet mask, standard gateway and DNS are automatically taken from

the DHCP server, e.g. the router.

6.5.2 Manual Setting

In order to ensure a trouble-free operation, all values must be given by the responsible network administrator and individually set in each inverter.

1. Navigate to

Configuration > Communication > Ethernet > IP address

2. Enter IPv4 address. The IPv4 address is arbitrary, but must be consistent throughout the subnet.

Default value:

192.168.130.30

3. Press OK to confirm.

4. Navigate to

Configuration > Communication > Ethernet > Subnet mask

5. Enter IPv4 mask. The IPv4 mask is arbitrary, but must be consistent throughout the subnet Default

value:

255.255.0.0

6. Press OK to confirm.

7. Navigate to

Configuration > Communication > Ethernet > Standard gateway

8. Enter the address of the router that allows connection to the internet

Default value:

192.168.1.1

9. Press OK to confirm.

10. Navigate to

Configuration > Communication > Ethernet > DNS

11. Enter arbitrary IPv4 address of the superior DNS server

Default value:

0.0.0.0

12. Press OK to confirm.

13. Restart inverter.

44 REFUsol 08K ... 23K REFU Elektronik GmbH

6.6

Communication via RS485

For monitoring via RS485, you need to use REFUcontrol device to forward data to the monitoring portal REFUlog.

You need to assign an unique USS address to each connected inverter.

Addresses: 1 to 31

This address is required for communicating with the inverter via RS485.

 After entering the address, restart the inverter to activate the new address.

Protocol type: 1: REFU USS protocol (preset)

2: (not used)

3: Meteocontrol USS

4: Modbus RTU Sunspec (address 0 cannot be used – address 0 is automatically set to address 1!)

5: Multimode USS / Modbus RTU Sunspec (in Multimode, you cannot use USS address 0 and 2!)

Baud rate: 57600 (preset and recommended)

115200 (for short RS485 networks)

Parity: even

Handshake: no

Data bits: 8

Stop bits: 1

Protocol: REFU USS protocol

6.7

Portal Monitoring

To ensure the inverter sends data via Ethernet to the REFUlog monitoring portal, the portal monitoring must be active.

Open Menu Configuration > Portal Monitoring and enter the following value:

0 = Portal monitoring via Ethernet not active

1 = Portal monitoring via Ethernet active

Notice

If the inverter is connected with RS485 to REFUcontrol, the setting 0 (Portal Monitoring via Ethernet not active) must be used!

REFU Elektronik GmbH REFUsol 08K ... 23K 45

6.8

Sending Config

Menu Configuration > Portal monitoring > Config sending

The configuration data is required by REFUlog in order to recognise the inverter. If you want to send it manually, select the menu and set the parameter to 1. If the sending was successful, the parameter will be set back to 0 automatically.

6.9

Portal Test Function

Menu Configuration > Portal monitoring > Portal Test

On request of our service, you can send a test data package to the portal. Open the menu and select „yes“.

46 REFUsol 08K ... 23K REFU Elektronik GmbH

Troubleshooting

7.1

Self-Test – Error Message

After the initialization routine, the system runs through a self-test. The individual parts of the system, such as firmware and dataset, are checked and data is read in from the power control board. If an error continues to be detected, possible remedial measures must be taken according to the type of error.

7.2

Transient Failure

In certain operating states the inverter goes temporarily offline.

Unlike malfunctions, “transient failures” are automatically acknowledged by the inverter which attempts to restart once the error no longer exists.

A transient failure is indicated by the red LED "ERROR" on the control panel flashing and remains stored in the fault memory even in the event of a power failure.

7.3

Faults

Pre-configured and customizable limit values are continuously monitored during ongoing operation. In order to be protected, the inverter power section is isolated from voltage supply if a limit value is exceeded or if a failure occurs. However, the DC and AC voltages may still be available. The corresponding fault message appears in the display.

The fault is indicated on the control panel by the red "ERROR" LED emitting steady light.

Fault messages are stored in the fault memory, where they will remain even in the event of a power failure. The fault memory can be called up via the display. The last 100 faults are recorded in the fault memory. The latest fault is kept at memory location S0, the oldest at S100. A new fault is always stored to memory location S0. When this happens, any fault already at memory location S100 will be lost.

7.4

Fault Acknowledgement

After shutdown due to a fault, the device remains locked against reactivation until the fault is acknowledged. It is not possible to acknowledge the fault while the cause of the fault still exists. The fault can only be acknowledged after the cause of the fault has been eliminated.

 To acknowledge the fault message, press the ESC key or turn the inverter off with the DC switch and

wait min. 30 seconds to turn the inverter ON again.

7.5

List of Error Messages

Note

Under certain weather conditions, condensation may form in the display. This is normal and causes no malfunction of the inverter.

REFU Elektronik GmbH REFUsol 08K ... 23K 47

Error Code

Text Description Action

90006 Grid overvoltage Phase overvoltage (AC) has been

detected.

Check the phase voltages (with a true RMS measurement device). If you consider the phase voltages to be in order, contact Service.

90007 Grid undervoltage Phase undervoltage (AC) has been

detected.

90008 Overfrequency The grid frequency has exceeded the

limit value.

As long as the inverter is detecting an over or under-frequency: check the frequency of the phases. If you consider the frequencies to be in order, contact Service

90009 Underfrequency The grid frequency has dropped

below the limit value.

9000A DC link 3 DC-voltage measurement error.

Wait for the measuremets to become stable again. If this takes more than 2-3h, please contact Service.

9000B DC link 1 Imbalance low: Difference between

the DC link voltages is too high.

9000C DC link 2 Imbalance high: Difference between

the two boosted DC link voltages is too high

9000D DC link 4 The boosted DC-voltage has dropped

below the mains peak value

90010 DC link 5 The boosted DC link voltage is too

high.

90011 DC link 6 The DC link voltage is too high.

90017 Communication LT Communication malfunction between

power section and control and regulation unit

The inverter will acknowledge the error automatically. If problem occurs repeatedly, contact Service

90018 Grid frequency LT Power section has detected

under/overfrequency

As long as the inverter is detecting a power section grid frequency: check the frequency of the phases. If you consider the frequencies to be in order, contact the Service

90019 Grid overvoltage LT The power section has detected a

phase overvoltage.

As long as the inverter is detecting a grid overvoltage or under voltage: check line voltages (with a true RMS measurement device). If you consider the line voltages to be in order, contact the Service.

9001A Grid undervoltage

The power section has detected a phase undervoltage.

9001B RCD fault The AFI-Board unit has detected a

residual current. Leads to an immediately shutdown

Check system isolation. As long as you consider the isolation impedance to be in order, contact Service.

9001D RCD warning

48 REFUsol 08K ... 23K REFU Elektronik GmbH

Error Code

Text Description Action

90020 Initialisation C1 Initialisation has failed.

Restart inverter. If this does not rectify the error, contact Service.

90021 Initialisation C0

90024 SR parameter error Error in parameter initialisation. The

device has been permanently shut down.

Please contact Service.

90029 Update fault Update failed The update has failed. Contact

Service.

9002A Keep Alive Internal communication monitoring

has determined a fault.

Please contact Service.

9002B Update End Update successful notification. An update was successfully

completed. The device will resume normal operation.

9002C AntiIslandPhaseShi

Islanding of the connected grid section has been detected

Wait for the grid to become stable again

9002D AntiIslandRocof

9002F FFS is read-only Internal data can't be written

anymore.

Please contact Service.

90030 DC share too high The measured DC-Part in AC current

exceed the defined limit.

90031 ETH link lost The Ethernet cable has been

removed

Check the Ethernet cable on the device and the receiver (router, switch) for a correct fit. If the cables are correctly connected and should the notification still be there, please contact Service.

90032 Restart The system has been rebooted. Should these notifications occur

repeatedly during daily operation, please contact Service.

90050 AC condition AC switch on condition not fulfilled Wait until the network is stable

90051 DC condition DC switch on condition not fulfilled Wait until the solar voltage is high

enough

90052 User lock active The inverter can't connect to the grid,

as the User-lock has been set.

Deactivate user lock

90053 Communication SR Internal communication problems Fault is independently resolved

after a few minutes. If not, switch device off and on again. If this does

REFU Elektronik GmbH REFUsol 08K ... 23K 49

Error Code

Text Description Action

not resolve the problem, contact Service.

90054 Overvoltage 2 The phase voltage has exceeded the

limit value of the voltage average monitor for too long.

As long as the inverter is detecting the voltage error: monitor line voltages (analyse grid). If you consider the line voltages to be in order, contact Service.

90055 Grid overvoltage Line-to-line overvoltage (AC)

detected

90056 Grid undervoltage Line-to-line undervoltage (AC)

detected

90057 Watchdog C0 Internal protection function is

triggered.

Contact Service.

90058 Watchdog C1

90059 LT Firmware The software of the power section is

defective.

90060 FRT stability Stability issue with the DC link

detected.

Please contact the service if it happens repeatedly

90061 Update fault This notification can be ignored.

No measures necessary.

90062 Fault ride through Grid-instability which is handled with

respect to the grid code standards.

A0013 PM isolation RCD

The measured value of the residual currents are over the limits: Measured value >150 mA -> Trip within 20 ms Measured value >60 mA -> Trip within 130 ms Measured value >30 mA -> Trip within 280 ms

Check system isolation. If you consider the system isolation to be in order, contact Service.

A0020 External cut-off External monitoring has triggered a

disconnection.

During the inverter detects an external cut-off: Verify external cut-off signal . Possible causes: wire breakage or wrong sensor selected. Refer to the manual for the right settings.

A0021 ARC fault detected Arc fault detection has triggered a

disconnection

Reset the arc fault detector. Press ESC on the Disblay.

A0022 Ext. OVGR Signal External stop signal OVGR is

detected.

During the inverter detects OVGR: Verify External stop signal OVGR. Possible causes wire breakage.

50 REFUsol 08K ... 23K REFU Elektronik GmbH

Error Code

Text Description Action

A0102 Overtemperature

LT 1

Cooler overtemperature (right)

Check temperature of direct surroundings and reduce this as required.

A0103 Overtemperature

LT 2

Interior overtemperature (left)

A0104 Overtemperature

LT 3

Interior overtemperature (right)

A0105 Overtemperature

LT 4

Cooler overtemperature (left)

A0106 Supply voltage LT Supply voltage at the power section

is too low.

Please contact Service

A010C PM isolation LT Power section detects an isolation

error on activation.

Check system isolation. If you consider the isolation resistance to be in order, contact Service.

A010E Device fault LT Power section hardware shutdown Note: When did the error occur

(precisely: day, kW output, time).

A0114 PM isolation RCD

Residual current measured from the power section exceeded the limits. residual current > Limit values of 20 mA, 130 mA, 280 mA respectively

Please contact Service

A0116 R-detect 0 Do nothing. The inverter will

acknowledge the error automatically. If problem occurs repeatedly, contact Service.

A0117 Isolation test unit Test isolation test is taking too long.

Please contact Service

A0118 Voltage offset LT Offset adjustment values between

power section and control and regulation unit divergent

A011A Activation LT 1 Voltage booster self-test failed.

Do nothing. The inverter will acknowledge the error automatically. If problem occurs repeatedly, contact Service.

A011B Activation LT 2 DC link voltage drop during activation

A011C Activation LT 3 Target value for balancing is invalid.

A011D Activation LT 4 Balancing has failed.

Please contact Service

A011E Activation LT 5 Voltage booster mailfunction

A011F Parameter error LT 5 Faulty reading or writing process in

power section memory

1.) Switch off device with DC disconnector.

2.) Wait until the display has turned off completely.

REFU Elektronik GmbH REFUsol 08K ... 23K 51

Error Code

Text Description Action

3.) Switch on device with DC disconnector. If this does not rectify the error, contact Service.

A0172 P24V LT aux. supply P24V supply voltage at the power

stack is too low.

Please contact Service

A0173 P5V LT aux. supply P5V supply voltage at the power

stack is too low.

A0174 P15V LT aux. supply P15V supply voltage at the power

stack is too low.

A0178 Temp. Sensor KR

checking open loop or short loop for temperature sensor cooler right

A0179 Temp. Sensor IL LT checking open loop or short loop for

temperature sensor cooling interior left

A017A Temp. Sensor IR LT checking open loop or short loop for

temperature sensor cooling interior right

A017B Temp. Sensor KL

checking open loop or short loop for temperature sensor cooler left

A017C N15V LT aux.

Supply

N15V supply voltage at the power stack is too low.

A017D Phase defect an error has been detected in the

power modules

52 REFUsol 08K ... 23K REFU Elektronik GmbH

Options

8.1

Irradiation and Temperature Sensor

For recording the irradiation and the module temperature, an irradiation and temperature sensor can be connected to the sensor interface of the inverter. The recommended type is Si-13TC-T-K and can be ordered at REFU Elektronik GmbH with art. no. 922009. The sensor plug can separately be ordered with art. no.

922010.

The sensor comes with a 3 meter UV-resistant connecting line (5 x 0.14 mm²). The line can be extended with a 5 x AWG 23 (0.25 mm²) shielded line, max. 328 ft (100 m).

8.1.1 Inverter Sensor Interface

Fig. 26: Connector M12 x 1 straight, shielded; pole arrangement: male M12, 5 pins, A-coded, view of male connector side, PHOENIX CONTACT designation: SACC-M12MS-5SC SH

Inverter sensor pins

Signal

Pin 1 Supply voltage (24 VDC, max. 2 W)

Pin 2 Ground

Pin 3 Signal Input 1 (0-10 V)

Pin 4 Signal Input 2 (0-10 V)

Pin 5 Shield

8.1.2 Sensor Type Si-13TC-T-K Cable

Sensor cable color Signal

Red Supply voltage (12-28 VDC)

Black Ground

Orange Measurement signal irradiation (0-10 V)

Brown Measurement signal temperature (0-10 V)

Black, thick Shield

REFU Elektronik GmbH REFUsol 08K ... 23K 53

8.1.3 Assembling of the Sensor Plug

⌀0.16″ – 0.31″

0.6 ft lbs

2 ft lbs

0.79″

AWG 26 – 20

0.47″

1.3″

0.39″

8.1.4 Connection of the Sensor at the Solar Inverter

Fig. 27: Standard connection at a solar inverter (not applicable at AFCI variant)

54 REFUsol 08K ... 23K REFU Elektronik GmbH

Fig. 28: Connection to two inverters (for AFCI variant)

In the AFCI variant, the irradiation and temperature sensor is connected individually to one inverter.

8.1.5 Configuration

The actual values of the sensor are shown on the display of the inverter at

Actual values > Sensor

The assignment of the sensor signals can be configures with PC software REFUset.

The data are recorded by the datalogger and are visible within REFUlog portal.

The actual values of the sensor can be viewed in

Actual values > Sensor

. The data continues to be recorded

with the data logger and can be viewed via REFUlog.

8.2

External Turn Off Signal

8.2.1 Overview

The REFUsol 08K ... 23K inverters have an internal grid protection relay and section switch.

Note:

The shield of the sensor line (dotted line) must be applied to PIN 2 and PIN 5! The outer diameter of the connecting cable can be max. 8 mm.

Note:

If you do not use the temperature input, wire a jumper across PIN 4 and PIN 5. Alternatively, you can also wire the jumper to the intermediate terminal point (cable extension).

REFU Elektronik GmbH REFUsol 08K ... 23K 55

Depending on local connection, installation instructions and the selected line voltage level either the internal grid protection relay can be used with section switch, or an external grid protection relay must be used with section switch also.

It is also possible to combine the internal to the external grid protection relay.

5 7

1 Photovoltaic modules 2 Solar Inverter 3 Three phase, redundant section switch 4 Control line 5 Grid measurement 6 Grid protection device 7 Public grid

8.2.2 Function

The internal section switches of the inverter can be controlled by an external signal.

At a signal voltage between 7.5 and 10 V the inverter feeds into the grid. If the signal voltage falls below 7.5 V, an error message will occur and the inverter will stop to work within the configured switch of time.

Nominal voltage

10 VDC

Voltage (operation)

7.5 … 10 VDC

Voltage (Stop)

0 … 7.5 VDC

Standard switch-off time inverter

50 ms

Switch-off time range

50 ms … 100 ms

56 REFUsol 08K ... 23K REFU Elektronik GmbH

8.2.3

Connections of the External Stop Signal (DRM 0)

Fig. 29: Single external stop signal

Fig. 30: Redundant external stop signal (does not apply to AFCI variant)

Fig. 31: Single external stop signal with sensor connected (does not apply to AFCI variant)

REFU Elektronik GmbH REFUsol 08K ... 23K 57

The configuration of the inverter is possible with the REFUset tool. Other switch off times required by the utility, for example, or other voltage ranges can be configured here. It is also possible to deactivate the internal grid protection relay function of the inverter if an external grid protection relay is connected to switch off the inverter and if your grid supplier allows it.

8.2.4

Configuration of the External Stop Signal (DRM 0)

The sensor function can be configured at the inverter display at

Configuration > External Signal

It is also possible to perform the configuraton with REFUset. This PC tool allows to define different voltage ranges and switch-off times. The inverter integrated grid protection can be deactivated if authorized by the grid operator.

DAN GER

Risk of electric shock and fire caused by high discharge current.

 Before

connecting

the device to the supply circuit, establish a ground

connection.

8.2.5 Attach the DRM 0 Sticker

 Attach the “DRM 0 (Australia)“ sticker next to the

Sensor

connector. The sticker can be found enclosed

to the instruction manual.

Note:

In order to ensure the function of the switch off signal, the sensor selection must be correctly set in the inverters.

58 REFUsol 08K ... 23K REFU Elektronik GmbH

Maintenance

9.1

Maintain the Inverter

The cooling of the inverter is exclusively through natural convection, therefore the cooling system is maintenance free.

Periodically, based on site conditions, visual inspection of the cooling fins is recommended to identify any debris accumulation that could occur. If found, the debris must be removed to ensure that the convection cooling is not inhibited.

Cleaning with high-pressure cleaners is prohibited.

Annually, the DC switch has to be operated without electricity 5 times.

REFU Elektronik GmbH REFUsol 08K ... 23K 59

Decommissioning

CAU TIO N

Danger of injury

 When decommissioning the inverter, take the weight

38.4

kg into account.

 Do not open device. Opening the device voids the warranty.

NOTIC E

Danger of damage to property

 Do not use the cover to hold the device. Only use the four holding grips to

move the device.

Fig. 32: Handles on the inverter

10.1 Remove Inverter

1. Deenergize the inverter completely.

2. Remove all cables from the inverter.

3. Loosen the screws (M5x20) securing the inverter to the wall-mounting bracket.

60 REFUsol 08K ... 23K REFU Elektronik GmbH

4. Remove the inverter from the wall-mounting bracket.

10.2 Disposal

Dispose of the packaging and replaced parts according to the rules applicable in the country where the inverter is installed.

Do not dispose of the inverter with normal domestic waste.

The inverter conforms to RoHS. That means that the device can be taken to municipal disposal sites for household appliances. REFU Elektronik GmbH takes the inverter back completely. Please contact the Service team.

REFU Elektronik GmbH REFUsol 08K ... 23K 61

Technical data

11.1 Inverter

Type 08K 10K 13K 17K 20K 23K-MV

Item no.

865P008 865P010 865P013 865P017 865P020 865P023

867P008 867P010 867P013 867P017 867P020 867P023

DC data

MPPT range (V) 370-850 410-850 480-850 460-850 490-850 575-850

DC start voltage (V) 350

Max. DC voltage (V) (U

SC_PV

) 1,000

Max. DC current (A) 23 25 31.1 38.3 41.8 41

Max. total short circuit c

urrent of the PV

plant (I

SC_PV

) (A)

MPP tracker 1

Number of DC connections 6 x Plus, 6 x Minus Phoenix Sunclix®

AC data

Max. AC apparent output (kVA) 8.25 10 13 17 20 23

AC grid connection L1, L2, L3, N, PE

Rated power factor/range 1 / 0.8i … 0/8c

Rated voltage AC (V) 400 460

Voltage range AC (V) 320-460 368-529

Rated frequency/frequency range (Hz) 50, 60 / 45…65

Max. AC current (A) (867…) 3 x 12

3 x 16 3 x 21

3 x 29.2

Max. AC current (A) (865…) 3 x 13 3 x 30,4

Max. distortion factor THD 2.5% 1.8%

Max. efficiency 98.1% 98.2% 98.3%

Feed-in starting at (W) 50

Internal consumption in night operation

(W)

< 0.5

Max. AC fall protection (A) 35

Switch on current (A) / duration (ms) < 5 / < 40

ENVIRONMENTAL CONDITIONS

Cooling Natural convection

Ambient temperature (°C) -25 … +55

Storage temperature (°C) -25 … +55

Transport temperature (°C) -25 … +70

Relative ambient humidity (%) 0 … 100

Site altitude (m above NN) 3,843*

Noise level (dBA) < 45

62 REFUsol 08K ... 23K REFU Elektronik GmbH

Type 08K 10K 13K 17K 20K 23K-MV

Item no.

865P008 865P010 865P013 865P017 865P020 865P023

867P008 867P010 867P013 867P017 867P020 867P023

Protection class (IEC 60529) IP65

SAFETY AND PROTECTION FUNCTIONS

DC circuit breaker / Isolation monitoring

Yes / yes

Grid monitoring Voltage, Frequency, Anti islanding, DC injection

Grid protection According to DIN VDE V 0126-1-1

Residual Current Monitoring Yes

Internal Overvoltage Protection (EN 61643-11)

Type 3, integrated

Protection Class (IEC 62103) I

Overvoltage protection (EN 60664-1) DC: II, AC: III

GENERAL DATA

Interfaces

Ethernet, RS485, Sensor (Irradiation and Temperature Sensor /

external stop signal)

Dimensions W x H x D (mm) 535 x 601 x 277

Dimensions with packaging W x H x D (mm)

595 x 640 x 395

Device weight (kg) 38.4

Weight with packaging (kg) 43.5

** Note derating of max. DC voltage:

Amount over NN. Max. DC voltage

Up to 3,843 m 1,000 V

Up to 4,000 m 971 V

11.2 Sensor

TYPE Si-13TC-T-K

GENERAL

Shunt resistor

0.10 Ω (TK = 22 ppm/K)

Working temperature

-20 – +70 °C (-4 – +158 °F)

Power supply

12 – 24 VDC

Current draw 0.3 mA

Connecting cable

4 x 0.14 mm² (AWG 6), 3 m (UV-resistant) (118.11″)

Cell dimension 50 mm x 34 mm

REFU Elektronik GmbH REFUsol 08K ... 23K 63

TYPE Si-13TC-T-K

Exterior dimension W x H x D (mm / in)

145 x 81 x 40 mm (5.71″ x 3.19″ x 1.57″)

Weight

340 g (0.75 lbs)

INSOLATION

Measuring range 0 – 1,300 W/m²

Output signal

0 to 10 V

Measuring accuracy

±5 % of final value

MODULE TEMPERATURE

Measuring range -20 – +90 °C (-4 – 194 °F)

Output signal 2.268 V + T [°C]* 86.9 mV/°C

Measuring accuracy

±1.5 % at 25 °C (77 °F)

Non-linearity

0.5 °C (32.9 °F)

Max. deviation

2 °C (35.6 °F)

PIN ASSIGNMENT

Orange

Measurement signal for insolation (0 to 10 V)

Red

Supply voltage (12 – 24 VDC)

Black

GND

Brown

Measurement signal for temperature (0 – 10 V)

Power supply Temperature and radiation sensor or PowerCap

64 REFUsol 08K ... 23K REFU Elektronik GmbH

Certificates

EU directives Directive 2014/30/EU

Directive 2014/35/EU

Safety IEC 62109-1:2010 / IEC 62109-2:2011

DIN VDE V 0126-1-1:2013-08

IEC 62116:2014

IEC 61727:2004

IEC 61683:2000

IEC 60068-2-1:2007

IEC 60068-2-2:2007

IEC 60068-2-30:2005

IEC 60068-2-78:2001

EN 60529:1991 + A1:2000 + A2:2013

IEC 60364-7-712:2016

EMC Immunity EN 61000-6-1:2007

EN 61000-6-2:2005

EMC Emissions EN 61000-3-12:2011

EN 61000-3-11:2000

EN 61000-6-3:2011

EN 61000-6-4:2007 + A1:2011

Grid Codes / Guidelines AS/NZS 4777.2:2015, AS 4777.3-2005, AS/NZS 3100:2017

VDE AR-N 4105:2011

BDEW Mittelspannungsrichtlinie (medium voltage directive) TR3 Rev 23, TR4 Rev 7, TR8 Rev 6

CEI 0-16:2012, 0-16 V1:2013, 0-16 V3:2014

CEI 0-21:2012-06, V1:2012-12, V2:2013-12, 2014-09, V1:2014-12

REFU Elektronik GmbH REFUsol 08K ... 23K 65

Contact

Please address any questions on malfunctions or technical problems to:

Service-Hotline: +49 (0)7121 4332 - 333

(Monday - Thursday, 8 am to 5 pm, Friday 8 am to 4 pm)

Online

Email: service.energy@refu.com

Website: www.refu.com

You should have the following data at hand:

• Exact description of the error with error code

• Device type

• Serial number

• Firmware version

REFU REFUsol 08K, REFUsol 10K, REFUsol 13K, REFUsol 23K-MV, REFUsol 17K Installation And Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual