---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 09/05/22: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:12 AM - ULPower electrical system (N43YX) 2. 12:50 PM - Re: ULPower electrical system (user9253) 3. 01:54 PM - Re: ULPower electrical system (Art Zemon) 4. 05:00 PM - Re: ULPower electrical system (user9253) 5. 05:14 PM - Re: ULPower electrical system (N43YX) 6. 08:01 PM - Re: ULPower electrical system (user9253) 7. 08:25 PM - Re: Re: ULPower electrical system (Charlie England) ________________________________ Message 1 _____________________________________ Time: 06:12:03 AM PST US Subject: AeroElectric-List: ULPower electrical system From: "N43YX" I'm working on an electrical design for a Waiex-B with a UL Power 350iS. I've started with Z21 but I think it may require some modification. I'm going with a single ECU and probably the 50A alternator upgrade (the ECU and fuel pump use 15A so the stock 30A alternator wouldn't leave a ton left for my electrical loads). The installation manual linked below seems lacking on the electrical system in several respects. 1) There is no OV protection 2) There is no way---CB or switch--to disconnect the alternator I'd like to use the B&C over voltage kit, but I doubt if that is possible with the larger alternator. At a minimum, I'd like to be able to manually disconnect the alternator. Could someone give me some guidance and suggestions? https://ulpower.com/content/1-engines/5-manuals/installation-checklist-v2.2.pdf Read this topic online here: http://forums.matronics.com/viewtopic.php?p=507828#507828 ________________________________ Message 2 _____________________________________ Time: 12:50:37 PM PST US Subject: AeroElectric-List: Re: ULPower electrical system From: "user9253" The UL Power electrical installation is explained in this manual: https://ulpower.com/content/1-engines/5-manuals/installation-manual-2022-v1.5.pdf If overvoltage protection is desired, use Z-16 as a guide. In fact, Z-16 also shows how to disconnect the alternator using a relay. Since the UL Power engine appears to have a 3 phase alternator, I recommend using 3 automotive relays, one for each phase. Using a 3 phase contactor is a more elegant way of controlling the alternator, but automotive relays have the advantage of low price and availability. The UL Power manual warns that the regulator (30amp only?) will be destroyed if it is disconnected from the battery. There is no danger to the regulator if the AC is disconnected. Best practice is to not switch the charging system on or off while the engine is running. The 10awg wire recommended for the 68 000 F capacitor seems big. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=507829#507829 ________________________________ Message 3 _____________________________________ Time: 01:54:13 PM PST US From: Art Zemon Subject: Re: AeroElectric-List: ULPower electrical system Why are you sizing your alternator for 50A? It is more typical to size the alternator for the maximum continuous load and I really wonder whether a Waiex needs 50 amps. For example, in my airplane, the autopilot servos have a max draw of 3.4 amp but a typical draw of only 1.8. Similarly, my comm radio has a max draw of 3.0 amps but a typical draw of only 0.5 and the 10 inch EFIS screen has a max draw of 2.25 but a typical draw of only 1.2. When I did a spreadsheet of max and typical draws for all devices, I came up with 29.28 max and 18.57 typical. You can see what I did in this overview drawing for my wiring system documentation. -- Art Z. On Mon, Sep 5, 2022 at 8:23 AM N43YX wrote: > > I'm working on an electrical design for a Waiex-B with a UL Power 350iS. > I've started with Z21 but I think it may require some modification. I'm > going with a single ECU and probably the 50A alternator upgrade (the ECU > and fuel pump use 15A so the stock 30A alternator wouldn't leave a ton left > for my electrical loads). The installation manual linked below seems > lacking on the electrical system in several respects. > > 1) There is no OV protection > > 2) There is no way---CB or switch--to disconnect the alternator > > I'd like to use the B&C over voltage kit, but I doubt if that is possible > with the larger alternator. At a minimum, I'd like to be able to manually > disconnect the alternator. > > Could someone give me some guidance and suggestions? > > > https://ulpower.com/content/1-engines/5-manuals/installation-checklist-v2.2.pdf > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=507828#507828 > > -- My blog: CheerfulCurmudgeon.com *Wisdom is knowing what to do next. Virtue is doing it. -- David Starr Jordan* ________________________________ Message 4 _____________________________________ Time: 05:00:13 PM PST US Subject: AeroElectric-List: Re: ULPower electrical system From: "user9253" My RV-12 has a 20 amp alternator. The plane uses less than 10 amps. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=507831#507831 ________________________________ Message 5 _____________________________________ Time: 05:14:50 PM PST US Subject: AeroElectric-List: Re: ULPower electrical system From: "N43YX" The ULPower engine is electrically dependent. It uses ~15 A at full throttle and about 12.5 A at cruise power. So, that gets subtracted off the top. Here is my list of electrical loads (first number is maximum; parenthetical numbers are typical): Engine 15 (13) Battery contactor 0.8 SkyView 3.6 (2.6) Intercom 0.1 AV-20S 0.5 iPad 0.4 Strobe lights 2 Seat Heater 10 Nav lights 0.6 Com 2 (0.2) Xpnder 0.4 CO Monitor 0.1 ADS-B receiver 0.1 AP 3.3 (2) Landing/taxi light 2.5 35.3 continuous Flaps are an additional 5 A, but since it is a (very) intermittent load I didn't include them. With traditional alternators, I have read that you should plan on loading them at ~80% capacity. Not sure that this applies to PM alternators. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=507832#507832 ________________________________ Message 6 _____________________________________ Time: 08:01:57 PM PST US Subject: AeroElectric-List: Re: ULPower electrical system From: "user9253" The 10amp seat heater can be subtracted. It is not a continuous load, especially in Tulsa OK. If the alternator can not maintain the voltage, It won't hurt to let the battery discharge for a few minutes while heating the seat. Percentage of safe alternator load depends on its temperature. If kept cool, it can even be operated at more than 100 percent. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=507833#507833 ________________________________ Message 7 _____________________________________ Time: 08:25:15 PM PST US Subject: Re: AeroElectric-List: Re: ULPower electrical system From: Charlie England Not a safe assumption=2E=C2- Some use seat heat to replace cabin heat=2E In those cases,=C2- load would be continuous,=C2- when it's needed=2E =81=A3Get BlueMail for Android =8B On Sep 5, 2022, 10:04 PM, at 10:04 PM, user9253 wrote: >--> AeroElectric-List mess age posted by: "user9253" > >The 10amp seat heater ca n be subtracted=2E It is not a continuous load, >especially in Tulsa OK=2E >If the alternator can not maintain the voltage, It won't hurt to let >the battery discharge for a few minutes while heating the seat=2E >Percentage of safe alternator load depends on its temperature=2E If kept >cool, it ca n even be operated at more than 100 percent=2E > >-------- >Joe Gores > > > >Read this topic online here: > >http://forums=2Ematronics=2Ecom/viewtop ic=2Ephp?p=507833#507833 > > ======================= >_ -= - The AeroElectric-List Email Forum - s List Features Navigator to browse List Un/Subscription, FAQ, =2Ematronics=2Ecom/Navigator?AeroElectric-List === t content also available via the Web Forums! ums=2Ematronics=2Ecom ==================== - NEW MATRONICS LIST WIKI - Email List Wiki! ===== Thank you for your generous support! -Matt Dralle, List Admin=2E on =========== ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.