Automatic management of two different energy sources - Solar
Contents
1. f Application Note o F Automatic management of two different energy sources General description Minimal configuration This application note explains how a user e Range of inverters can easily switch between two different energy sources at the entry of an Xtender o All Xtender Series e RCCO02 03 These two different sources would be for o Software vers 1 3 14 and higher example in a backup system the switch between the grid and a generator or in a o RCC User level EXPERT marine application the switch between the shorepower and the on board generator Features amp advantages e Automatic switch between two different energy sources and possibility to program the two different currents of the two ac sources e Possibility to define a master source when two energy sources are present simultaneously e Presence of a mechanical interlock module that ensures in all cases no short circuit on the sources Application Schematic Grid or Generator Xtender series Consumers eesee eee eee Remote entry a i eo SS TAC IN i a a I AC OUT ee tn ai Te ax YY Automatic AC i l transfer switch l Battery Figure 1 Automatic management of two different energy sources Page 1 9 adr ee p JLONNI YAGNLS 80 Z Z A GOO NV Detailed description The automatic AC transfer switch This particular application is a set composed of three relays and two time delay relays to d2. Sharing 1107 1537 Press SET adjust the desired OAN value i with and press SET Press SET and search with Your input current is adjusted Alternate max input current 1567 i The current value Aac must be set according to the size of the circuit breaker or the grid capacity Press SET adjust the desired value i with and press SET Your input current is adjusted i The current value Aac must be set according to the size of the circuit breaker or the grid capacity Page 6 9 Kariger 5 Remote entry active 7 Immediate detection of input voltage loss optional Xtender settings Press SET and search with V y System 1101 Press SET and search with l Remote entry Remote ON OFF 1537 Press SET and search with Remote entry active 1545 Press SET selection Open with and press SET The remote entry is active as Open 6 Smart Boost allowed optional Press SET and search with A y Basic settings 1100 Press SET and search with l Lockings 1123 Press SET and search with Smart Boost allowed 1126 Press SET selection Yes with and press SET The Smart Boost is allowed Page 7 9 SET j A ESC y AC IN and Transfer 1197 Press
3. still open max current of the ac source 15A e The battery is automatically charged Xtender series t Remote entry i r Lf fie SA i i x l ly N I ACIN m IAC OUT eee gt 1 i pes I Automatic AC i transfer switch ee aqii Figure 6 System simultaneously connected the grid and on a generator There are two energy sources on the system but the master source selected is the grid The power is delivered from the master source here the grid or for a marine application from the shorepower AC out AC in The contact remote entry is closed max current of the ac source 10A The battery is automatically charged Kariger Parameters amp descriptions Three parameters allow controlling this function 1 Use an alternate max input current 1566 L authorize the use of a second energy source at the input of the system Set as YES 2 Alternate max input current 1567 L gt is the value of the power ac source of the second energy source Set according to the size of the circuit breaker or the grid capacity 3 Remote entry active 1545 L gt This parameter allows you to determine if the command entry is activated closed or open Set as active open Master source closed Second source open Additional function 1 Smart Boost allowed 1126 Optional L gt helps the generator by adding the missing power Prevents from overloadin
4. system is connected to the grid like any other consumer but it is the system that can not afford a power outage in case of a blackout It is therefore necessary for the company to have a second source of energy only for the computer system Backup source consists of a generator a battery and an inverter charger For this reason the second ac source may be less powerful than the grid For example the current delivered by the grid is 40A while the current drawn by the computer system is only 8A So the generator should be sized for 8 to 10A The backup runs on batteries and if the blackout is too long the generator is started In normal case the max current of the ac source 40A and in backup case the max current of the ac source 10A Marine systems In the case of a boat equipped with an on board generator When the boat is at sea the energy source is the on board generator But when the boat is moored into port the energy source is also the shorepower In most cases these two ac sources have different powers The on board generator might provide 16A as the shorepower only 8A This will require many changes during docking or departure at sea of the boat With the automatic management of two different energy sources all these changes belong to the past For example back to our boat A boat docked at the port during the night will be connected to the dock max current of the ac source 8A When the bo
5. SET and search with Immediate detection of input voltage loss 1435 Press SET selection Yes with and press SET The mode UPS is selected Press SET and search with Example of AC transfert switch Fieldtests and pictures by STUDER Innotec http www studer innotec com Figure 10 Automatic AC transfer switch not wired Figure 11 Automatic AC transfer switch wired The kit available at Studer Innotec includes only the different parts described on page 5 List of parts The wiring and the fixing rail are not provided Page 8 9 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 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 modifications to the product without prior notification Page 9 9 herten
6. Specification Installation relay Contactor three REL CONTACTEUR 3L 32A phase Allen 230V 2 Bradley 32A Mechanical lock REL CONTACTEUR BLOC F4 F2 Fuse block Woertz 3 woerRtz 4 FUSIBLE 4mm2 Grey K4 K5 Time delay relay REL INSTAL RETARD 5A Time delay 2s Page 5 9 Nsrever RCC 02 03 programming guide 1 User level to EXPERT 3 Use an alternate max input current Remote controller ttings SET gt E Press SET and search with y Press SET and search with User level 5012 y System 1101 Press SET and insert the code i Press SET and search with 42 64 68 y Remote entry Remote ON OFF Press SET 1537 Your level is Press SET and search with y EXPERT Use an alternate max input current 1566 i The code is available in the user manual RCC 02 03 ai Press SET selection Yes with A and press SET The alternate max input current is activated 2 Maximum source AC current 4 power sharing Alternate max input current Xtender settings AL ESC I SET P Press SET and search with Press SET and search with y y Basic settings 1100 System 1101 Press SET and search with Press SET and search with A f Max source AC Remote entry current Power Remote ON OFF
7. at goes at sea its power source becomes the generator max current of the ac source 16A At midday the boat returns to port and connects back to the dock max current of the ac source 8A The boat heads for sea again for the afternoon and uses the generator as energy source max current of the ac source 16A Kariger System situations Grid or Generator Xtender series CE Remote entry i oft Ta i He E IACOUT a amp Spec ae t Eo Automatic AC transfer switch Oe es ac ees oe ey Figure 3 System on grid connected e The power is delivered from the grid or for a marine application from the shorepower AC out AC in e The contact remote entry is closed max current of the ac source 10A e The battery is automatically charged Xtender series Grid or Generator Automatic AC transfer switch i Figure 4 System in mode stand alone e The grid is disconnected there is no more power on AC in e The contact remote entry is open max current of the ac source 15A e The battery supplies energy to AC out through the inverter Xtender series a Remote entry tf 0 bisaa i T rs CIN 1 l yO pa TED N l l Automatic AC transfer switch i Grid or Generator Battery Figure 5 System on generator connected e The power is delivered from the generator AC out AC gen Page 3 9 Grid or Generator e The contact remote entry is
8. etect the presence or absence of different energy sources at the entry of the system Grid or Generator ia He e i tee Automatic AC transfer switch Battery Figure 2 Automatic AC transfer switch The user can define a master source in case of simultaneous presence of the two different energy sources see situation 4 p 3 Also the user can program the current of the two ac sources The Xtender will automatically select the predefined current depending on the connected ac source With the remote entry the Xtender is informed about which of the ac source is selected to set the proper current It is possible to order all the necessary equipment at Studer Innotec Note that Studer Innotec does not supply prewired mounting for this application Scheme and list of equipment available on page 5 Function description To better illustrate this function we will take two concrete examples Note also that there are two general cases involving the use of different energy sources at the entry of an Xtender 1 Backup systems 2 Marine systems Backup systems In the case of a system requiring no power interruption backup system there could be two different ac sources for example the grid and a generator The automatic AC transfer switch will automatically connect to the second source in case for example of a blackout Page 2 9 For example the computer system of a company This computer
9. g the input even if consumers are higher than the input source grid or generator Set as YES Xtender series Grid or Generator Xtender serie EI l i Me Automatic AC transfer switch Battery Figure 7 System with the Smart Boost function activated 2 Immediate detection of input voltage loss 1435 Optional L gt Allows to starting the inverter mode as quick as possible in case of fluctuations of the AC in grid This function is useful when it comes to very sensitive loads that require an uninterruptible power supply UPS Set as YES Page 4 9 Automatic generator startup Optional For backup systems it is obviously convenient to have a fully automated system Thus it is possible in case of blackout and under voltage battery to start the generator automatically This is possible with the Xtender and one of its auxiliary contacts Xtender series Grid or Generator 56 Automatic AC transfer switch Det es A i y E s Figure 8 System with an automatic generator startup Associated application notes ANOO1 AC source assistance Smart Boost function Only possible with a generator equipped with an automatic start Latge Scheme of the automatic AC transfer switch Independent neutral Master Source Remote entry T Remote entry Figure 9 Automatic AC transfer switch with independent neutral List of parts Studer reference Quantity
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