Related Manuals for REFUSOL 20K-2T
Summary of Contents for REFUSOL 20K-2T
- Page 1 Operating manual REFUsol 20K-2T REFUsol 33K-2T Solar Inverter Product | REFUsol 20K...33K-2T Document No./Issue | 982079/05 Issue Date | 2021-03 Language | English...
- Page 2 Copyright Publisher © REFU Elektronik GmbH REFU Elektronik GmbH The reproduction, distribution and utilization of this Marktstraße 185 document as well as the communication of its contents 72793 Pfullingen, GERMANY ✆ +49 7121 4332 0 to others without express authorization is prohibited. ✆...
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Page 3: Table Of Contents
Systems .............9 Requirements for the Installation Site... 34 Technical Description ......10 Mounting the Inverter Bracket ....... 35 Functionality of the Inverter......10 Remove the Inverter from the Packaging ..36 Cooling Concept ..........12 REFUsol 20K...33K-2T 982079 | 05 | 2021-03... - Page 4 Main Menu > 2. Event List ........51 6.2.3 Main Menu > 3. System Info ........51 6.2.4 Main Menu > 4. System Time ........51 6.2.5 Main Menu > 5. Software (firmware) Update ..52 REFUsol 20K...33K-2T 982079 | 05 | 2021-03...
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Page 5: About This Manual
Scope of this Manual stand. This manual applies to the following products: Tab. 1: Symbols/signs ∘ REFUsol 20K-2T Solar Inverter ∘ REFUsol 33K-2T Solar Inverter Symbol Meaning Useful information on the optimal and most eco- nomical use of the product. -
Page 6: Warnings In This Manual
▸ Measures required to avoid the danger. NOTICE Can lead to property damage if ignored. ▸ Follow the warnings to avoid damage or destruction of the product! About this Manual REFUsol 20K...33K-2T Presentation of Information 982079 | 05 | 2021-03... -
Page 7: Safety And Responsibility
Rules for Safe Installation and Operation 5 min ∘ Do not attempt to install or operate the product without proper training. ∘ Ground the product properly. Fig. 1: Symbols on the product REFUsol 20K...33K-2T Safety and Responsibility 982079 | 05 | 2021-03 Safety Guidelines... -
Page 8: Designated Use
Designated Use well as his knowledge of the relevant regulations, can The REFUsol 20K...33K-2T, is a solar inverter, which assess the work assigned to him, recognize possible transforms the direct current generated by the PV gen- dangers and take suitable safety measures. -
Page 9: Personal Protective Equipment
Personal Protective Equipment REFU Elektronik GmbH recommends to wear the following personal protective equipment. ∘ Safety shoes ∘ Protective gloves ∘ If required: transport aid ∘ Safety goggles REFUsol 20K...33K-2T Safety and Responsibility 982079 | 05 | 2021-03 Personal Protective Equipment... -
Page 10: Technical Description
Functionality of the Inverter 4 AC protection (fuse switch disconnector or circuit breaker) 5 Grid protection The REFUsol 20K...33K-2T is a multi-string inverter 6 Isolation transformer is required for medium-voltage grid with two MPP trackers that converts the DC voltage... - Page 11 (roof surfaces with differ- inputs due to shading or different orientation (azimuth orientation) ent orientation) or tilt angle), independent mode should be used for the purpose of PV yield optimisation. REFUsol 20K...33K-2T Technical Description 982079 | 05 | 2021-03 Functionality of the Inverter...
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Page 12: Cooling Concept
Cooling Concept Fig. 4: Cooling of the inverter Technical Description REFUsol 20K...33K-2T Cooling Concept 982079 | 05 | 2021-03... - Page 13 Remote Alarm card (optional) In/Out control (optional) Fig. 5: Overview circuit diagram REFUsol 20K...33K-2T (for REFUsol 20K-2T: 2 x PV per MPPT input; for 33K-2T: 3 x PV/MPPT input) REFUsol 20K...33K-2T Technical Description 982079 | 05 | 2021-03 Cooling Concept...
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Page 14: Connection Requirements
∘ The REFUsol 20K...33K-2T is not equipped with inter- Connection Requirements nal potential isolation. ∘ If connected with the medium-voltage-grid, it must at medium Additional required at low voltage be operated with electrically isolating transform- voltage net- equipment network ers. -
Page 15: Compatible Grid Types
Transformer Transformer sheet. Compatible Grid Types The REFUsol 20K...33K-2T are compatible with the TN-S, TN-C, TN-C-S and TT grid types. When using the TT mains, the voltage between the neutral conductor and earth should be less than 30 V. REFUsol... -
Page 16: Components And Dimensions
7 Heat sink with fans membrane 1 Pressure compensation 6 AC cover 2 DC switch 8 PV connection area IN2 7 Heat sink (20K-2T only) membrane 3 PV connection area IN1 (MPPT2) 2 DC switch 8 PV connection area IN2... - Page 17 Brand name Fig. 9: Structure of the type code 528 mm Fig. 10: Dimensions front view 1 Housing cover 2 LED display with membrane keys and status LEDs REFUsol 20K...33K-2T Technical Description 982079 | 05 | 2021-03 Components and Dimensions...
- Page 18 528 mm 245 mm Fig. 11: Dimensions side view Fig. 12: Dimensions rear view 1 Heat sink 2 Inverter bracket Technical Description REFUsol 20K...33K-2T Components and Dimensions 982079 | 05 | 2021-03...
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Page 19: Communication Interfaces
Fig. 14: Type plate of the inverter 336 mm 30 mm Communication Interfaces 459 mm Fig. 13: Dimensions of the inverter bracket The REFUsol 20K...33K-2T have 3 communication ports: two RS485 interfaces and one Ethernet/WiFi interface. REFUsol 20K...33K-2T Technical Description 982079 | 05 | 2021-03... - Page 20 Communication ports, digital inputs Terminal connection Designation DRM0 ⇔ ⇔ ⇔ ⇔ Function/circuit for power Logic-GND – reduction = 0 % = 30 % = 60 % = 100 % Technical Description REFUsol 20K...33K-2T Communication Interfaces 982079 | 05 | 2021-03...
- Page 21 IN1 IN2 IN3 IN4 GND DRM0 6 mm 6 mm Fig. 16: Pin assignment terminal connection digital inputs Fig. 17: Pin assignment RJ45 for RS485 communication REFUsol 20K...33K-2T Technical Description 982079 | 05 | 2021-03 Communication Interfaces...
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Page 22: Display And Operating Elements
6 ∧ key: Menu level upwards 2 Normal operation (On) 3 Alarm/fault 7 ESC key: Cancel or return 4 OK key: Confirm selec- 8 LCD display tion or value Technical Description REFUsol 20K...33K-2T Display and Operating Elements 982079 | 05 | 2021-03... -
Page 23: Keys
Waiting or test state green Normal operation (inverter in feed mode) 1 Operating status and communication status Fault or permanent fault 2 Real-time measured values AC and DC mains condition REFUsol 20K...33K-2T Technical Description 982079 | 05 | 2021-03 Display and Operating Elements... - Page 24 3 MPPT scan function Lights up during remote 2 RS485 interface active 4 Activity on RS485 bus 4 Real-time power shutdown 5 High inverter internal tem- perature Technical Description REFUsol 20K...33K-2T Display and Operating Elements 982079 | 05 | 2021-03...
- Page 25 3 DC voltage and current per three seconds) measuring channel 6 AC current of phases L1, (changes every three sec- L2 and L3 or AC frequency onds) (changes every three sec- onds) REFUsol 20K...33K-2T Technical Description 982079 | 05 | 2021-03 Display and Operating Elements...
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Page 26: Menu Display
Normal Normal ror or fault occurs, the inverter goes into the (Feed-in operation) temporary or permanent error state. Fault (temporary) Permanent Fig. 25: Starting the inverter Technical Description REFUsol 20K...33K-2T Display and Operating Elements 982079 | 05 | 2021-03... -
Page 27: Led Display Of The Ethernet And Wifi Stick
The fault is recti- fied by a qualified electrician and by evaluating nent the displayed error code. Fig. 26: Ethernet stick (LSE-3) and WiFi stick (LSW-3) REFUsol 20K...33K-2T Technical Description 982079 | 05 | 2021-03 LED Display of the Ethernet and WiFi Stick... -
Page 28: Led Display Ethernet Stick Lse-3
LED lights up for approx. 5 s. Server connection successful: SER LED flashes quickly and NET LED lights up for approx. 7 s. ➪ Start of normal operation. Technical Description REFUsol 20K...33K-2T LED Display of the Ethernet and WiFi Stick 982079 | 05 | 2021-03... -
Page 29: Led Display Wifi Stick Lsw-3 (Optional)
Communication with solar inverter failed READY Logger status Flashing interval 1 s Logger active Flashing interval 100 ms Restore factory settings Logger not active REFUsol 20K...33K-2T Technical Description 982079 | 05 | 2021-03 LED Display of the Ethernet and WiFi Stick... -
Page 30: Efficiency And Power Diagrams
Efficiency and Power Diagrams DC voltage (V) Fig. 28: DC voltage power diagram Rated output power [%] Fig. 27: Efficiency diagram AC voltage (V) Fig. 29: AC voltage power diagram Technical Description REFUsol 20K...33K-2T Efficiency and Power Diagrams 982079 | 05 | 2021-03... -
Page 31: Installation
∘ Phillips screwdriver ∘ Allen key for M6 ∘ Hammer ∘ Assembly tool for MC4 connectors ∘ Combination pliers ∘ Wire stripper ∘ Stripping tool ∘ Cable cutter ∘ Crimping tool(s) REFUsol 20K...33K-2T Installation 982079 | 05 | 2021-03 Installation Warnings... -
Page 32: Check Scope Of Delivery
∘ Voltage tester Quantity 20K- Quantity 33K- ∘ Marker pen Description ∘ Measuring tape REFUsol ∘ Spirit level with protractor 20K-2T or ∘ Warning sign for maintenance work REFUsol 33K-2T Check Scope of Delivery 1. Check the packaging for damage. Inverter bracket If damage is found, do not unpack the inverter and contact the supplier immediately. -
Page 33: Requirements For The Installation Site
MC4 crimp contacts (DC+) MC4 crimp contacts (DC-) Hexagon socket screw M8x80 heavy duty anchor for inverter bracket Operating Manual Fig. 30: Requirement for the installation site REFUsol 20K...33K-2T Installation 982079 | 05 | 2021-03 Requirements for the Installation Site... - Page 34 15° 50 cm 50 cm Fig. 31: Vertical installation Fig. 32: Distances and clearances Installation REFUsol 20K...33K-2T Requirements for the Installation Site 982079 | 05 | 2021-03...
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Page 35: Mounting The Inverter Bracket
– or select equivalent fastening material. 5. Tighten all screws of the heavy-duty anchors cross- wise Fig. 33: Minimum installation distance and arrangement of several REFUsol 20K...33K-2T Mounting the Inverter Bracket Fig. 34: Mounting the inverter bracket There are two options for mounting the inverter bracket. -
Page 36: Mount Inverter
2. To secure the inverter, tighten the M6 hexagon socket screw on the inverter bracket. 3. If necessary, use a lock to prevent theft. Installation REFUsol 20K...33K-2T Mount Inverter 982079 | 05 | 2021-03... -
Page 37: Connect Earthing Conductor
M5 at the marked potential equalisation con- ✅ The potential equalisation conductor with a cross- nection with a tightening torque of 4.5 Nm. section of 16 mm² is prepared. REFUsol 20K...33K-2T Installation 982079 | 05 | 2021-03 Connect Earthing Conductor... -
Page 38: Connect Ac Cable
4. If necessary, protect the potential equalisation con- nection against corrosion. Connect AC Cable Tab. 5: AC fuse and minimum cross-sections of the AC cables Type REFUsol 20K-2T REFUsol 33K-2T Conductor cross ≥ 10 mm² ≥ 16 mm² section* Fuse... -
Page 39: Assembling And Connecting Dc Cables
9. Tighten the union nut of the PG cable gland. 4. Check that the ladder is firmly seated. 10.Check proper installation of the AC cable and tight- ness of the AC cover. REFUsol 20K...33K-2T Installation 982079 | 05 | 2021-03 Assembling and Connecting DC Cables... -
Page 40: Connect Dc Cable
1. Insert MC4 connectors DC+ and DC- into the corre- sponding housing sockets/plugs until the MC4 con- nectors snap into place. 2. Check safe contacting. Fig. 38: DC cable assembly with MC4 connector Installation REFUsol 20K...33K-2T Assembling and Connecting DC Cables 982079 | 05 | 2021-03... -
Page 41: Connect Communication
4.11 Connect Communication 4.11.1Connect RS485 Communication REFUsol 20K...33K-2T are equipped with an Ethernet 1. Remove the RS485 and digital input cover on the interface as standard. inverter. Device information (yield data, error messages, 2. Slightly loosen the union nut of the PG screw con- alarms, operating status) of the inverter is transmitted nection. -
Page 42: Connect Rs485 Communication
8. Tighten the union nut of the PG screw connection. 9. Check the tightness and the strain relief of the PG screw connection and cover. 6. Fit the RS485 and digital input cover. Installation REFUsol 20K...33K-2T Connect Communication 982079 | 05 | 2021-03... -
Page 43: Connecting The Ethernet Stick Lse-3
2. Slightly loosen the cable gland of the Ethernet adapter. 3. Plug the shielded RJ45 Ethernet cable into the 2. Plug in the WiFi stick. Ethernet stick. 3. Fasten the WiFi stick with two screws. REFUsol 20K...33K-2T Installation 982079 | 05 | 2021-03 Connect Communication... -
Page 44: Refulog Monitoring Portal
As soon as an Internet connection is established via The name of the access point is "AP" followed by the WiFi or Ethernet, the REFUsol 20K...33K-2T automatically serial number of the WiFi stick (see WiFi stick type send their operating data to the REFUlog monitoring plate). -
Page 45: Commissioning
6. Switch on the DC switch. 7. Switch on the AC switch. ➪ The inverter goes into feed-in operation (normal). 8. Check and document the correct settings of all safety-related parameters. REFUsol 20K...33K-2T Commissioning 982079 | 05 | 2021-03 Testing the Electrical Safety... -
Page 46: Operation
4 OK key: Confirm selection or ues AC and DC mains 5. Software Update value 9 Performance data 5 ∨ key: Menu level downwards 10 Menu display Operation REFUsol 20K...33K-2T Operation, Navigation and Key Functions 982079 | 05 | 2021-03... -
Page 47: Main Menu > 1. Enter Setting
12.Set Start Parameter ▷ Reset internal energy meter. 13.Set Safety Voltage 14.Set Safety Frequency 3. Clear Events ▷ Delete internal event list. 15.Set Insulation 16.Relay Test 17.Set Reactive Power REFUsol 20K...33K-2T Operation 982079 | 05 | 2021-03 Main Menu (v2.6) - Page 48 Spain RD1699 Europe General Turkey Customer VDE0126 Denmark Cyprus Greece Continent India Netherlands Philippines Belgium New Zealand UK-G59 Brazil (380V) China Slovakia VSD France Slovakia SSE Poland Slovakia ZSD Operation REFUsol 20K...33K-2T Main Menu (v2.6) 982079 | 05 | 2021-03...
- Page 49 ▷ If the inverter has been producing energy for more than 24 hours, the country code can only be 12. Set Start Parameter – 16. Relay Test changed after entering a password. Contact REFU (Function not available.) REFUsol 20K...33K-2T Operation 982079 | 05 | 2021-03 Main Menu (v2.6)
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Page 50: Main Menu > 2. Event List
6.2.3 Main Menu > 3. System Info Tab. 7: RS485 interface settings REFU-USS The system information interface displays the unit Parameter Value information and important settings. Baud rate 57600 Parity even Operation REFUsol 20K...33K-2T Main Menu (v2.6) 982079 | 05 | 2021-03... -
Page 51: Main Menu > 4. System Time
OK key. ▷ Display current system time. 8. Enter password "0715". ➪ The system updates the processors (DSP1/DSP2). For each processor, it displays an "OK" message af- ter success. REFUsol 20K...33K-2T Operation 982079 | 05 | 2021-03 Main Menu (v2.6) -
Page 52: Error Messages And Troubleshooting
SystemInfo > 3. SoftVersion. the error "DSP communicate fail". ▷ To display recorded events, press the ESC key > go to "3. Event List" > press the OK key. Error Messages and Troubleshooting REFUsol 20K...33K-2T Main Menu (v2.6) 982079 | 05 | 2021-03... - Page 53 ID06 VLvrtlow AC voltage is too Check the applied AC voltages; if critical voltage conditions persist, contact your pow- low. er supply company. REFUsol 20K...33K-2T Error Messages and Troubleshooting 982079 | 05 | 2021-03 Main Menu (v2.6)
- Page 54 Check that the DC current is within the maximum limits and check the connection to tOCP too high, the hard- the MPPT inputs. If no troubleshooting is possible, contact REFU Service. ware protection is active. Error Messages and Troubleshooting REFUsol 20K...33K-2T Main Menu (v2.6) 982079 | 05 | 2021-03...
- Page 55 ID21 MChip_Fault Master chip (DSP) error. ID22 HwAuxPow- Auxiliary voltage erFault error. ID23 BusVoltZer- Measurement er- oFault ror - DC bus volt- age. REFUsol 20K...33K-2T Error Messages and Troubleshooting 982079 | 05 | 2021-03 Main Menu (v2.6)
- Page 56 Internal error of the inverter. Switch off the DC switch, wait 5 minutes and switch the stant high. DC switch on again. If no troubleshooting is possible, contact REFU Service. Error Messages and Troubleshooting REFUsol 20K...33K-2T Main Menu (v2.6) 982079 | 05 | 2021-03...
- Page 57 The maximum DC currents should be almost symmetrical at both inputs. If no trou- bleshooting is possible, contact REFU Service. ID31- – (Reserved) – ID48 REFUsol 20K...33K-2T Error Messages and Troubleshooting 982079 | 05 | 2021-03 Main Menu (v2.6)
- Page 58 DSP is not consistent - failed. ID51 Consist- Comparison of DC entFault_DCI current readings between master DSP and slave DSP is not consist- ent - failed. Error Messages and Troubleshooting REFUsol 20K...33K-2T Main Menu (v2.6) 982079 | 05 | 2021-03...
- Page 59 PV system must be checked; possible causes of the fault could be defec- tive PV cables or MC4 connections. REFUsol 20K...33K-2T Error Messages and Troubleshooting 982079 | 05 | 2021-03 Main Menu (v2.6)
- Page 60 The ambient tem- Fault_Env perature is too high. ID60 PE Connect Connection error Check secure contacting of the PE conductor. Fault PE conductor. ID61- – (Reserved) – ID64 Error Messages and Troubleshooting REFUsol 20K...33K-2T Main Menu (v2.6) 982079 | 05 | 2021-03...
- Page 61 DC bus voltage is erVbusUn- unbalanced, an er- balance ror cannot be re- set. ID70 UrecoverO- AC current is too CPInstantDC high, a fault can- not be reset. REFUsol 20K...33K-2T Error Messages and Troubleshooting 982079 | 05 | 2021-03 Main Menu (v2.6)
- Page 62 WRITEEE- not recoverable. PROM ID76 Unrecover- The EEPROM is READEE- not recoverable. PROM ID77 Unrecover- The relay has a RelayFail permanent fault. ID78- – (Reserved) – Error Messages and Troubleshooting REFUsol 20K...33K-2T Main Menu (v2.6) 982079 | 05 | 2021-03...
- Page 63 The inverter records ID84 in the event of a remote shutdown. Check the wiring of the switched off by re- remote control input and output signal connector on the communication board ac- mote disconnec- cording to this manual. tion. REFUsol 20K...33K-2T Error Messages and Troubleshooting 982079 | 05 | 2021-03 Main Menu (v2.6)
- Page 64 Lightning Overvoltage pro- Check the surge protection modules (SPD's), if no troubleshooting is possible, con- protection tection modules tact REFU Service. alarm (SPD's) have been triggered. Error Messages and Troubleshooting REFUsol 20K...33K-2T Main Menu (v2.6) 982079 | 05 | 2021-03...
- Page 65 Switch off the DC switch, wait 5 minutes and switch on the DC switch. If no troubleshooting is possible, contact REFU Service. ID98 SD fault The microSD card Replace the microSD card. is faulty. ID99- – (Reserved) – REFUsol 20K...33K-2T Error Messages and Troubleshooting 982079 | 05 | 2021-03 Main Menu (v2.6)
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Page 66: Maintenance
If necessary, clean the inverter with a dry or 12 months slightly damp cloth. Visual inspection and, if necessary, cleaning of 12 months the heat sink. Error Messages and Troubleshooting REFUsol 20K...33K-2T Maintenance 982079 | 05 | 2021-03... -
Page 67: Decommissioning
50 kg. Store Inverter ▷ Store inverters in a dry place with an ambient tem- perature between -25 and +70 °C. REFUsol 20K...33K-2T Decommissioning 982079 | 05 | 2021-03 Taking the Inverter Out of Operation... -
Page 68: Dispose Inverter
Art.-No. 850P020.200 850P033.200 posed of in accordance with the regulations of the Number of independent country in which the product is installed. The REFUsol MPPT 20K...33K-2T must not be disposed of together with nor- Number of DC inputs per MPPT mal household waste. -
Page 69: Performance
Protection REFUsol Inverter Type 20K-2T 33K-2T Art.-No. 850P020.200 850P033.200 REFUsol Inverter Type 20K-2T 33K-2T Nominal grid frequency 50, 60 Hz Art.-No. 850P020.200 850P033.200 Max. output current 32 A 53 A DC switch Integrated Total harmonic distortion <3 % Safety protection... -
Page 70: Communication
Communication REFUsol Inverter Type 20K-2T 33K-2T Art.-No. 850P020.200 850P033.200 REFUsol Inverter Type 20K-2T 33K-2T Cooling Natural con- Art.-No. 850P020.200 850P033.200 vection Digital inputs 4 (P : 0%, 30%, 60%, 100%) Dimensions (H × W × D) 666 × 528 × 254 mm... - Page 72 REFU Elektronik GmbH REFU Elektronik GmbH Marktstraße 185 Marktstraße 185 72793 Pfullingen, GERMANY 72793 Pfullingen, GERMANY ✆ +49 7121 4332 0 ✆ +49 7121 4332 0 ✆ +49 7121 4332 333 (Service) ✆ +49 7121 4332 333 (Service) ℻ +49 7121 4332 140 ℻...
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