Anti-blackout system for grid connected solar
Contents
1. 6mm Blue B WOERTZ 6 BLEU 2 Junction block Woertz 6mm B WOERTZ 6 JAUNE VERT 5 Yellow Green B WOERTZ PAROI DE Closure for junction block Woertz FERMETURE ENS26 B WOERTZ 4 FUSIBLE Appendices Page 6 9 ernen Appendix 5 2 Example of wiring The box The assembling PE REE VE ath Baie PN xt De xs xs Pe e The distances between the bars of support must be respected so At the top of the box are wired de saa Relays K15 K14 K11 K12 and K13 and fuse holders F11 and Box type 1448 500 400 X 400 X 200 www rittal ch This system can be connected in any electrical box whose size re pele At the bottom of the box are wired The wiring must be according to the local regulation Fuse holders F13 F14 and F15 and the terminals X1 X2 X3 X6 X7 and X8 The bars The bars of support are not provided by Rittal support are not provided The bars of support are not provided by Rittal Rittal The cables must be wired as close as possible to relays and contacts to leave a place for the ENS 31 Appendices Page 7 9 Soronen Here are added onto the middle bar the ENS31 relay s K10 1 and l i I K10 2 and on the bottom bar the ENS31 fuse holder s F16 F17 nd connect the ENS31 with particular attention to the order of and F18 Note that the neutral must be connected to the ENS31 otherwise NNN the unit may be damaged All references for the ENS31 are in its2. adjust the height of the central bar Then remove the ENS31 to facilitate wiring K10 1 and K10 2 and remplace it user manual hs TUDER Appendices Page 8 9 Appendix 5 3 Description of the preset Solsafe for Xtender series If it is not possible to obtain the preset Solsafe it is possible to set by yourself the RCC 02 03 using the parameter description below Applicable from software version 0 1 3 8 XTH M 12 24 48 VDc Menu Combi Inverter Charger Param 1438 Solsafe system presence Yes Menu Inverter Param 1187 Stand by level 0 Menu RELAIS 1 Load shedding when the battery is almost empty and load reconnected when battery back to 2 25V cell By default load shedding means Aux relay activated when battery ok Param Param 1202 Operating mode AUX 1 Value reversed automatic 1497 Combination of the events the auxiliary contact 1 Value Any Function OR Menu 1245 Active in function of the battery voltage AUX 1 Param Param Param Param Param Param Param Param Param Param Param Param 1288 Use of dynamic compensation of battery level AUX 1 1246 Battery voltage 1 activate AUX 1 Yes 1247 Battery voltage 1 AUX 1 11 6 23 2 46 4 VDc 1248 Delay 1 1min 1249 Battery voltage 2 activate AUX 1 Yes 1250 Battery voltage 2 AUX 1 12 24 48 VDc 1251 Delay 2 10min 1252 Battery voltage 3 activate AUX 1
3. Yes 1253 Battery voltage 3 AUX 1 12 2 24 3 48 6 VDc 1254 Delay 3 30min 1255 Battery voltage level to deactivate AUX 1 13 5 27V 54 VDc 1256 Delay to deactivate AUX 1 60min Warning None of the other parameters present in relay AUX1 menu should be changed Menu RELAIS 2 Condition to have the grid inverter re directed at the output of the Xtender By default disconnected Param Param 1311 Operating mode AUX 2 Value automatic 1498 Combination of the events the auxiliary contact 2 Value All Function AND Menu 1456 Contact active on event only theses parameters Param Param Param 1340 Inverter active Yes 1519 Xtender ON AUX 2 Yes 1521 No over temperature no overload no transformer over temperature Menu 1353 Active in function of the of battery voltage AUX 2 Param Param Param Param Param Param 1354 Use of dynamic compensation of battery level AUX 2 Yes 1355 Battery voltage 1 activate AUX 2 Yes 1356 Battery voltage 1 AUX 2 13 26V 52 VDc 1357 Delay 1 5min 1364 Battery voltage level to deactivate AUX 2 14 28V 56 VDc 1356 Delay to deactivate AUX 2 Omin Warning None of the other parameters present in relay AUX2 menu should be changed Appendices Page 9 9 ks TUDER
4. available on www ufegmbh de Grid inverter manufacturer will give the procedure to deactivate the function impedance jumps hs TUDER RCC 02 03 programming guide Go to Expert level Remote controller settings E Press SET and search with User level 5012 Pros SET and insert the code i 42 64 68 Press SET Your level is EXPERT i The code is available in the user manual RCC 02 03 Load preset Solsafe Remote controller setting PE A ESC ESAG Press SET and search with L Save and restore files 15013 Pro SET and search with Load library of Xtender parameters 5045 Press SET and choose the library Solsafe with A and press SET to validate Wait until the library is installed Only for Solsafe concept with Xtender series and Solsafe concept with Xtender three phase system Preset Solsafe description available in the appendices Page 6 7 Sormen Notes Worldwide sales and service Switzerland Studer Innotec Rue des Casernes 57 1950 SION Switzerland Tel 027 205 60 80 Fax 027 205 60 88 STUDER Email info studer innotec com Web http www studer innotec com Limitation of responsibility The use of STUDER INNOTEC devices is the responsibility of the customer in all cases STUDER INNOTEC reserves the right to make any m
5. cut mode the backup inverter supplies the consumers from the batteries K2 AUX2 is switched on the grid Solar energy is not necessary as long as the battery is full No grid and batteries partly charged K1 AUX1 is in power cut mode the consumers are supplied by backup inverter batteries and or solar energy K2 AUX2 is switched on the backup grid Solar energy is used for supplying the consumers and or the batteries Bi directional output of inverters No grid and batteries discharged K1 AUX1 is in bypass mode and disconnects completely the consumers It will switch back in power cut mode when the battery will recover a partial charged level K2 AUX2 is switched on the backup grid Solar energy is used for charging the battery 1 Compact or Xtender Series DC BU H i JAN PV Wind generator Public grid Demand counter BJ mer 4 Supply counter 1 Compactor 1 Xtender Series l PV Wind generator Public grid Demand counter e Supply counter PV Wind generator K1 2 are for Compact series and AUX1 2 are for Xtender Series Page 3 7 Consu
6. grid L Light EI K11 K13 K13 K14 N 1 100 C23 KF 230VAC 5 F11 F12 x i 1PN 25A o X6 S 2 L lt TN 2 O E X3 iL all a Q i ill re NER ITI ce Y L D D 3 1 QO 19 ENS optional PV array nT gt Fl HP eee 1 RTT 1 E 1 Ca m m os a a ITU oma Fai m oe a 1 po PL SPR 4 Refrigerator 4 Domotic Mar RT Appendix 5 Scheme Xtender three phase system CT 230VAC Uninterrupted AC grid 7 utility Utility counter A Light Grid demand 4 Refrigerator z F11 L Domotic L1 L3 4 etc jp F11 F12 K11 K12 K13 K14 TBD According to max current F12 4 utility counter d a supply This drawing shows a working principle and gt ae gt should not be considered as a wiring proposal The local regulation should be respected In this ae ir S aanas scheme the inverter charger is a simple user of eee ne the grid and when the grid is present the battery gets charged and maintenance comes from the 1 MTT grid Appendices Page 5 9 hs TUDER Appendix 5 1 List of parts The various components listed below are available in kit form at Studer Innotec Single phase Solsafe Kit with Compact series Three phase Solsafe Kit with Xtender series Studer reference Quantity Studer reference Quantity Single phase breaker 25A DISJ MG MONO 25A C 2 Three phase breaker 25A DISJ MG TRI 25A C 2 Installation relay 16A REL INSTAL 16A 1 Installation rel
7. ay 16A REL INSTAL 16A 1 Contactor three phase Allen Bradley REL CONTACTEUR 3L 23A 230V 4 three phase Allen Bradley REL CONTACTEUR 3L 23A 230V REL CONTACTEUR BLOC Mechanical lock block VERROU 2 Junction block Woertz 6mm Grey B WOERTZ 6 GRIS 19 Junction block Woertz 6mm Blue B WOERTZ 6 BLEU 5 E 5 Junction block Woertz 6mm Yellow Green B WOERTZ 6 JAUNE VERT Closure for junction block Woertz spel ae Fuse block Woertz 4mm Grey B WOERTZ 4 FUSIBLE Locking block 6 6 Grey B BUTEE PLASTIQUE SD card with Solsafe preset SD CARD SOLSAFE Optional ENS31 UFEgmbh ENS31 Exes eT Fuse block Woertz 4mm Grey B WOERTZ 4 FUSIBLE 23A REL CONTACTEUR BLOC Mechanical lock block for contactor VERROU 2 Junction block Woertz 6mm Grey B WOERTZ 6 GRIS Junction block Woertz 6mm Blue B WOERTZ 6 BLEU 5 Junction block Woertz 6mm Yellow Green B WOERTZ 6 JAUNE VERT 5 Closure for junction block Woertz ee DE ENS26 UFEgmbh Fuse block Woertz 4mm Grey Single phase Solsafe Kit with Xtender series Studer reference Quantity Single phase breaker 25A DISJ MG MONO 25A C 2 Installation relay 16A REL INSTAL 16A 1 5 Contactor three phase Allen Bradley REL CONTACTEUR 3L 23A 230V A 23A REL CONTACTEUR BLOC Mechanical lock block VERROU 2 Junction block Woertz 6mm Grey B WOERTZ 6 GRIS Junction block Woertz
8. he grid thrugh the Compact charger with a normal cycle bulk charge absorbtion and floating Solsafe relays descriptions K1 AUX1 is always actuated until warning for LVD and actuated again when battery level is 50 LED 17 K2 AUX2 is actuated when the unit is in inverter mode no AC in with a battery voltage which is less than the absorption voltage and the temperature less than 65 C K14 is closed when the grid is present or when K11 is open K15 force K14 when grid is present K12 and K13 are mechanically and electrically interlocked e K11and K14 are mechanically and electrically interlocked Page 4 7 Serner Solsafe concept installation design and commissioning General information for Solsafe concept with Compact series This particular application requires a Compact XPC C or HPC driving the external auxiliary relay module ARM 01 The ARM 01 is a module consisting of 4 auxiliary relays to use only with the Compact series The K1 and K2 relays have a dedicated function to the Solsafe application The K3 relay is not used and the K4 relay is a replication of the auxiliary contact of the inverter charger and can be programmed for particular applications This module is already included in the S Box type S Box 25C Using the S Box type S Box 25C will greatly facilitate the wiring of Solsafe system General information for Solsafe concept with Xtender series This particular application req
9. ks TUDER Application Note PEPE Anti blackout system for grid connected solar installations Solsafe concept General description Minimal configuration The Solsafe concept is a system which will e Range of inverters automatically switch from a solar inverter connected to the public grid to a backup grid o All XPC serie The installation of the Solsafe concept in a o All C serie grid connected solar system enables to secure totally or partially the power supply o All HPC serie in case of a power cut and allows the use of o Xtender Series solar power when the grid is off o All XTH serie o Compact Series Features amp advantages o All XTM serie e Backup system for grid connected solar e RCC02 03 Only for Xtender series installation o Software vers 1 3 8 and higher e Grid feeding with solar inverter o RCC User level Expert e Hassle free cabling quick installation and easy commissioning with the Solsafe S Box Application Schematic GRID INVERTER Not secured 23LONNI YIANLS 80 9 L LA EOONV Figure 1 Solsafe concept with the Solsafe S Box Page 1 7 Detailed description The Solsafe concept The Solsafe concept is a backup system for grid connected solar installations This solution enables to secure totally or partially the power supply in case of a power cut and to keep on using the solar energy being produced Note that all inverter chargers of Studer Innotec are bi directi
10. mers i i K1 AUX 1 K2 AUX 2 Consumers K1 AUX 1 K2 AUX2 Consumers N f K1 AUX 1 K2 AUX 2 Consumers K1 AUX 1 K2 AUX 2 ks TUDER Solsafe system behavior example The graph below shows in detail the behavior of the Solsafe system in every possible case Grid Secured loads 28 8 Battery 27 2 voltage 26V 22V Secured load s power TS Trt HIT K2 K13 AUX2 K12 UIT Solar power K1 K14 K15 Grid is present and battery is maintained floating by the grid All the solar production is sold to the grid Grid is discontinued and secured loads are supplied by the Studer inverter only as long as grid inverter is not charging night time or if the battery is already fully charged Grid is discontinued and secured loads are supplied by the Studer inverter and grid inverter Solar power is not enough to supply loads and charge the battery Grid is discontinued and secured loads are supplied by the grid inverter and excess of production is charging the battery Grid is discontinued and secured loads are not supplied because battery is almost fully discharged due to an average consumption greater than solar average production The system is may be under dimensioned or the battery capacity is diminished due to aging Loads will stay disconnected until battery has recovered 25 capacity Grid is back again and the charge of the battery is done from t
11. odification to the product without prior notification Page 7 7 Mariner Appendices Appendix 1 S Box scheme Power Appendix 2 S Box scheme Control Appendix 3 Scheme Compact series and S Box 25C E Appendix 4 Scheme Xtender series and S Box 25X E Appendix 5 Scheme Xtender three phase system Appendix 5 1 List of parts Appendix 5 2 Example of wiring Appendix 5 3 Description of the preset Solsafe Appendices hs TUDER Appendix 1 S Box scheme Power F11 1PN 25A pl ao pl Grid Backup Consumption grid counter T L Mn pE Inverter Charger output Appendices Page 1 9 F12 1PN 25A T 7 LIN pl Grid inverter Grid output roo Feeding I ENS26 counter aes Note If the ENS Module is required it replaces the connections of X4 hs TUDER Appendix 2 S Box scheme Control un CT 230AC 100 C23 KF 230AC Grid Consumption counter X7 P F14 315mA k1 ARM 01 k2 NON NON 2NO K13 K12 a E 100 C23 KF 230AC 100 23 KF 230AC Inverter Charger output Appendices Page 2 9 X3 N _ 100 C23 KF 230AC Grid Feeding counter Mar RT Appendix 3 Scheme Compact series and S Box 25C E TBD jg P ll C Unprotected N TBD C AC grid Solsafe S Box 25C E EE SE NONE AEA EINEN EG n counter Compact HPC XPC C xxx Utility demand inve
12. onal This allows integrating any of them into the Solsafe concept Figure 2 Solsafe concept Compared to other similar solutions the Solsafe concept offers the following advantages e It allows a great flexibility by choosing independently the grid feeding power matching the solar generator and the stand alone power matching the peak consumption of the user e The grid feeding inverter can be chosen with high voltage input range lowering wiring costs e The wiring can be optimized by placing the grid feeding inverter near the solar field e It allows a possible upgrade of existing grid connected installations e The inverter charger allows a fast charging from the grid important in case of frequent power cuts hindering a complete charge of the battery e The power available in case of islanding is added inverter charger Pnom grid feeding instantaneous power e ts allows an upgrade of existing stand alone installations that are connected to the grid afterwards adding value to the investment e It standardizes the amount of products to maintain and makes the staff training easier this concept can be implemented with all our combis XTH XTM XPC Compact and HPC e t allows to work with standard grid feeding inverters SolarMax Fronius and therefore gives access to better prices Page 2 7 e It ensures that no grid feeding from the battery i
13. plication and the module ENS 31 for three phase application The module ENS 26 is already included in the S Box type S Box 25C E and S Box 25X E System dimensioning PV array The voltage of the PV generator is only given by the grid inverter whatever is the battery voltage of the inverter charger It must be according to grid inverter Grid Inverter The power of the grid inverter can be freely chosen but the maximum output power should not be higher than the inverter charger nominal power Wiring should be in accordance with the manufacturer s prescriptions Battery Battery should be sized according to the backup time requirement but we recommend a min size of C10 2 5x Po Ubatt Inverter charger Compact series or Xtender series The inverter charger must be sized according to the maximum secured power For the Compact and Xtender series the stand by must be at 0 to work with the Solsafe system An ENS Module is used to connect decentralized electricity generators to the public electricity supply and in the event of faults in the mains supply the ENS Module interrupts the feeding of electricity of the monitored phase into the mains to prevent an islanding effect The following deviations are monitored e overvoltage and undervoltage frequency deviation impedance jumps These instructions are directly extracted from Chapter 2 1 of Module ENS manual of the company UfE GmbH More information
14. rter charger Grid TBD utility counter supply This drawing shows a working principle and should not be considered as a wiring proposal The local regulation should be respected In this scheme the inverter charger is a simple user of the grid and when the grid is present the battery gets charged and maintenance comes from the grid PV array om ost p my Hp K gen 1 RTT 1 K 1 Ua om om ces ss STV vm ad Ui oe es et 4 1 p PR FR Appendices Page 3 9 CT 230VAC m U m gt lt S Y Uninterrupted AC grid L Light A Domotic K11 K14 100 C23 KF 230VAC F11 F12 1PN 25A AL Refrigerator Mar RT Appendix 4 Scheme Xtender series and S Box 25X E TBD 4 lan me ee utility PE S pes counter Utility demand Grid T TBD TBD L1 i PE mm PE s N E B N ro TBD Battery utility EEE counter supply This drawing shows a working principle and should not be considered as a wiring proposal The local regulation should be respected In this scheme the inverter charger is a simple user of the grid and when the grid is present the battery gets charged and maintenance comes from the grid Xtender inverter charger Unprotected Solsafe 5 Box 25X E AC grid X1 CT 230VAC G G 3 am gt am aa 8 8 8 OM gt OD 8 OM gt OD OD gt OM gt gt gt OD Appendices Page 4 9 Uninterrupted AC
15. s possible which actually a big concern for utilities is paying back each solar kWh supplied to the grid Concretely it avoids that kWh s paid at a low price from the grid then stored in the battery are then supplied and sold at a high price from the battery to the utility grid The Solsafe system can be fully wired by the installer In that case Studer is only supplying the inverter charger Xtender or Compact series and the ARM 01 Module for Compact series or the preset Solsafe for Xtender series The wiring schematics for the Solsafe system and Solsafe three phase system are at disposal in the appendices available at the end of this document Solsafe S Box For the Solsafe system a Solsafe genuine cabling solution exists the S Box The S Box offers e Hassle free cabling e Quick installation e Easy commissioning Figure 3 S Box The S Box can be supplied in 4 versions e S Box 25A for Compact Series S Box 25C e S Box 25A for Xtender Series S Box 25X e S Box 25A with ENS Module for Compact Series S Box 25C E e S Box 25A with ENS Module for Xtender Series S Box 25X E hs TUDER Solsafe concept situations The Solsafe concept can be described by these four different situations The grid is present K1 AUX1 is in bypass mode K2 AUX2 is switched on the grid feeding grid The grid charges the batteries No grid and batteries fully charged K1 AUX1 is in power
16. uires an Xtender XTH or XTM with auxiliary contact AUX1 and AUX2 specifically programmed to drive the contactor of the source switch over The specific programming is done by downloading the preset Solsafe delivered with the S Box If the wiring is done by the installer without the S Box the preset can be requested via e mail on info Q studer innotec com Specific programming description on appendices Using the S Box type S Box 25X will greatly facilitate the wiring of Solsafe system General information for the Solsafe concept with Xtender three phase system This particular application requires 3 Xtender XTH or XTM with auxiliary contact AUX1 and AUX2 specifically programmed to drive the contactor of the source switch over Note that Studer Innotec does not supply pre wired S Box for three phase systems It is possible to order all the necessary equipment at Studer Innotec List of equipment preset Solsafe and information on the assembly are available in appendices ENS module When using the Solsafe concept the function impedance jumps or ENS on the grid inverter must be always turned off impedance of inverter is not similar to the one of the grid Page 5 7 Thus if the function jumps impedance is mandatory it is required to add an external ENS module in the greed feeding path Studer Innotec recommends two ENS modules of the company UfE GmbH The module ENS 26 for single phase ap
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