AN005 automatic AC switch.indd
Contents
1. of a blackout lt 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 boat goes at sea its power source becomes the generator max current of the ac source 16A At midday the boat retur2. Application Note SAMLEX EUROPE 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 mil Alenderserles e RCCO02 03 These two different sources would be for l example in a backup system the switch o Software vers 1 3 14 and higher between the grid and a generator or ina 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 seer eee eee Remote entry s i AL gt iA i I ACOUT 1a i i AC OUT a ele Gia l AC l l transfer switch Battery Figure 1 Automatic management of two different energy sources Page 1 9 Detailed description The automatic AC transfer switch This particular application is a set composed of three relays and two time delay relays to detect the presence or absence of different energy s
3. elivered from the generator AC out AC gen e The contact remote entry is still open max current of the ac source 15A The battery is automatically charged Xtender series Grid or Generator i I e i of 10A S aa i 1AC No ACN a Ha TAA Automatic AC l transfer switch or nati a Battery 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 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 The battery is automatically charged Page 3 9 SAMLEX EUROPE Parameters amp descriptions Three parameters allow controlling this function 1 Use an alternate max input current 1566 authorize the use of a second energy source at the input of the system Set as YES 2 Alternate max input current 1567 ES 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 lex 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 a
4. endent neutral _ Master_ source z Eai 3 T Remote entry ik Remote entry 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 Part Name Designation Samlexreference Quantity Specification Installation relay 16A ee tf Contactor three REL CGONTACTEUR 3L 32A phase Allen 230V 2 Bradley 32A Mechanical lock REL CONTACTEUR BLOC Fi F2 Fuse block Woertz 5 woeRTz 4 FUSIBLE 4mm2 Grey Fonnfonsioc fewoemrzeretey o enna fonction Bock BWOERTZGrGRS 6 orm Gris Forno Bock BWOERTZSFAUNEVERT o omr Year E E E block FERMETURE Locking Block B BUTEE PLASTIC 6 6 Grey Page 5 9 SS SAMLEX EUROPE RCC 02 03 programming guide 1 User level to EXPERT Remote controller SET P settings TT Press SET and search with y User level 5012 Press SET and insert the code i 42 64 68 Pres SET Your level is EXPERT i The code is available in the user manual RCC 02 03 2 Maximum source AC current power sharing Xtender settings AL ESC L SET gt Press SET and search with l y Basic settings 1100 Press SET and search with Max source AC current Power Sharing 1107 Press SET adjust the desired value i with gt a
5. ithout prior notification Page 9 9 SAMLEX EUROPE
6. llowed 1126 Optional Es 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 Set as YES Grid or Generator Figure 7 System with the Smart Boost function activated 2 Immediate detection of input voltage loss 1435 Optional 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 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 Grid or Generator Xtender series Pe re j AUX contacts Remote entry F e I i p DE n I I oF 7 l i i I ACIN 1 i AC OUT 1 oo aed Foe a 7 E i _ Automatic AC I i transfer switch ale SENE EE oo aaa west te Battery Figure 8 System with an automatic generator startup Associated application notes gt ANOO1 AC source assistance Smart Boost function Only possible with a generator equipped with an automatic start Page 4 9 SAMLEX EUROP E Scheme of the automatic AC transfer switch Indep
7. nd 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 3 Use an alternate max input current Xtender settings A ESC L SET JP Press SET and search with y System 1101 Press SET and search with Remote entry Remote ON OFF 1537 Press SET and search with Use an alternate max input current 1566 Press SET selection Yes with A and press SET The alternate max input current is activated 4 Alternate max input current Xtender settings AL ESC SET p Press SET and search with y System 1101 Press SET and search with 5 Remote entry Remote ON OFF 1537 Press SET and search with Alternate max input current 1567 Press SET adjust the desired value i with and press SET Your input current is adjusted circuit breaker or the grid capacity i The current value Aac must be set according to the size of the SF SAMLEX EUROP E 5 Remote entry active Xtender settings a ESC SET i Press SET and search with y System 1101 Press SET and search with Remote entry Remote ON OFF 1537 Press SET and search with Remote e
8. ns 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 Page 2 9 SAMLEX EUROPE 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 Xtender series i f Remote entry _ B Be Ed nate transfer switth Waa lt ae ss eh a Bac ji 104 er i 4 i Battery Figure 3 System on grid connected 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 The battery is automatically charged Xtender series Grid or Generator 1 MESE Remote entry i 4 F216 E at pe pd mar transfer switch ae Battery Figure 4 System in mode stand alone 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 Grid or Generator I PrE Remote entry f i rai Ete ACIN Ca lt r s5 a i YY Automatic AC transfer switch a Battery Figure 5 System on generator connected e The power is d
9. ntry active 1545 Press SET selection Open with and press SET The remote entry is active as Open 6 Smart Boost optional Xtender settings a ESC SET P Press SET and search with y Basic settings 1100 Press SET and search with Lockings 1123 Pros SET and search with Smart Boost allowed 1126 Press SET selection Yes with and press SET The Smart Boost is allowed Page 7 9 7 Immediate detection of input voltage loss optional Xtender settings a AL ESC Press SET and search with y AC IN and Transfer 1197 Pros SET and search with Immediate detection of input voltage loss 1435 Press SET selection Yes with lt gt and press SET The mode UPS is selected SAMLEX EUROPE Example of AC transfer switch Figure 10 Automatic AC transfer switch not wired Figure 11 Automatic AC transfer switch wired The kit available at Samlex Europe includes onlyhe different parts described on page 5 List of parts The wiring and the fixing rail are not provided Page 8 9 SAMLEX EUROP E Notes Limitation of responsibility The use of SAMLEX EUROPE devices is the responsibility of the customer in all cases SAMLEX EUROPE reserves the right to make any modifications to the product w
10. ources at the entry of the system Grid or Generator 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 lt 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 anda generator The automatic AC transfer switch will automatically connect to the second source in case for example of a blackout For example the computer system of a 005 _ 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
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