AN005 Automatic management of two different
Contents
1. Kroen aplication Note 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 These two different sources would be for e Xtender example in a backup system the switch between the grid and a generator or in a marine application the switch between the shorepower and the on board generator e RCCO02 03 o Software vers 1 3 32 and higher o RCC User level EXPERT o Software vers 1 3 28 and higher 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 VS DALONNI YJANLS OL 9 E N S00 NV Detailed description The automatic AC transfer switch This particular application is a set composed of t2. source Remote entry 1 a Se l LV 8L ote entry LV K1 7 b _ fee ZY LV Kee ge Pee eee nae eee Temp CV GND CV IE a C K3 DE a E E Ny pet as oR A eres y 7 q q Use this contact in case of automatic management of a generator as second energy source See AN007 te e ee Brst CV Fuses values F1 amp F2 To be defined for respect the local regulation Figure 9 Automatic AC transfer switch with independent neutral List of parts Studer reference Quantity Specification Installation relay reat ala REL CONTACTEUR 3L 32A r Bradley 32A eau 21 22 Mechanica lock REL CONTACTEUR BLOC a aa EREE omane OO umetne BWOERTZGHGRS 6 omm 6rs Favret Bock BWOERTZ HIAUNEVERT 3 Grin VeulGr_ essere block FERMETURE Locking Block B BUTEE PLASTIC 6 6 Grey Page 5 9 herten RCC 02 03 programming guide 1 User level to EXPERT 3 Use an alternate max input current Remote controller ttings P 4 ESC SET b Press SET and search with Press SET and search with User level 5012 y Press SET and insert the code SYSTEM 1101 426
3. 468 Press SET and search with i Remote entry Press Sere Remote ON OFF 1537 Your level is EXPERT Press SET and search with Use an alternate Ton max input current 1566 Press SET selection Yes with A and press SET The alternate max input current is activated 2 Maximum current of AC source Input limit 4 Second maximum current of AC source Input limit Xtender settings Xtender settings Press SET and search with AL ESC SET P Press SET and search with Basic settings 1100 Press SET and search with SYSTEM 1101 Maximum current of AC source Input Press SET and search with limit 1107 3 Remote entry Press SET adjust the desired Remote ON OFF value i with and press SET 1537 Your input current is Press SET and search with adjusted y Second maximum current of AC source Input limit 1567 i The current value Aac must be set according to the size of the r circuit breaker or the grid Press SET adjust the desired capacity value with and press SET Your second input current value 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 herten 5 Remote entry active 7 Immediate detection of input voltage loss op
4. 50 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 SA devices is the responsibility of the customer in all cases STUDER INNOTEC SA reserves the right to make any modifications to the product without prior notification Page 9 9 herten
5. 567 A L gt is the value of the power ac source of the L a mee ii second energy source a eee l transfer switch De a m Set according to the size of the circuit breaker or the grid capacity Zz 3 Remote entry active 1545 eae i Aa i Figure 8 System with an automatic generator startu L gt This parameter allows you to determine if Fig Sy g p ae open Associated application notes Set as active ee ANOO1 AC source assistance Smart Boost function Master source closed ANOO7 Automatic start of a generator Second source open age i Only possible with a generator equipped with an Additional function oaie iai 1 Smart Boost allowed 1126 Optional L gt helps the generator by adding the missing power Prevents from overloading the input even if consumers are higher than the input source grid or generator Setas YES Grid or Generator Xtender series 4 2o pai 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 mode Set as YES Page 4 9 herten Scheme of the automatic AC transfer switch Independent neutral Master
6. hree relays and two time delay relays to detect 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 compute
7. igure 5 System on generator connected Page 3 9 e The power is delivered from the generator AC out AC gen e The contact remote entry is still open max current of the ac source 15A e The battery is automatically charged Grid or Generator Xtender series t Remote entry A E ii Tar ad i oH 10A Si i l p mee IACOUT aS D AC IN SUG qe sl re a Automatic AC transfer switch eee Figure 6 System simultaneously connected the grid and on a generator e There are two energy sources on the system but the master source selected is the grid e The power is delivered from the master source here 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 Kariger Parameters amp descriptions Automatic start of a generator Optional For backup systems it is obviously convenient Pile gt De talietere o E Wile to have a fully automated system Thus it is bci possible in case of blackout and under voltage 1 Use an alternate max input current battery to start the generator automatically 1566 This is possible with the Xtender and one of its L gt authorize the use of a second energy auxiliary contacts source at the input of the system Grid or Generator Xtender series k emote entry i 2 Alternate max input current 1
8. r system of a company This computer 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 cu
9. rrent of the ac source 8A When the boat 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 Warning the values of the energy sources grid and generator are only used to illustrate the examples below These values are to be defined for each case Grid or Generator Remote entry E q 3 hia a l AC IN 1 AC OUT ese ml iel VY Automatic AC transfer switch _ E 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 FATTY Automatic AC transfer switch Di a nits a oo i a 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 Grid or Generator Xtender series SS e e me i i Remote entry i i Automatic AC i transfer switch I F
10. tional Xtender settings SET Press SET and search with j Press SET and search with SYSTEM 1101 y AC IN AND TRANSFER Press SET and search with 1197 eee A 3 Press SET and search with A emote 1537 Immediate detection of input voltage loss Press SET and search with A 1435 Press SET selection Yes Remote entry active with and press SET 1545 7 The mode UPS is Press SET selection Open selected with and press SET The remote entry is active as Open 6 Smart Boost allowed optional Xtender settings SET r Press SET and search with y Basic settings 1100 Press SET and search with A uy Smart Boost allowed 1126 Press SET selection Yes with and press SET The Smart Boost is allowed Page 7 9 Nerever Example of AC transfert switch Fieldtests and pictures by STUDER Innotec http www studer innotec com bo i 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 herten Notes Worldwide sales and service Switzerland Studer Innotec SA Rue des Casernes 57 19
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