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user9253
Joined: 28 Mar 2008
Posts: 1928
Location: Riley TWP Michigan
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 Posted: Thu Jan 29, 2015 6:42 pm Post subject: Electrical System with Dual Batteries & Brownout Prevent |
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Attached is a diagram that I drew of an electrical system with two engine-cranking batteries and brownout prevention. It is intended for a seaplane that will fly into remote lakes. Either battery can crank the engine. One of the batteries will run a bilge pump. If the engine is cranked using only one battery, then the other battery will provide 12 volts to avionics to prevent brownout. The electrically dependent engine will be powered by the same bus as the avionics. With multiple current paths through two contactors and two relays, the chances of this bus losing power are slim. Good workmanship will prevent short circuits.
Go ahead and point out any faults with this diagram or give suggestions. You will not hurt my feelings. I want to fix any shortcomings or design errors. I used Bob N's Z-19/RB as a staring point, although you might not see any resemblance.
Joe
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Dual Cranking Bat with Brownout.pdf |
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Joe Gores
Last edited by user9253 on Tue Feb 03, 2015 7:37 pm; edited 1 time in total |
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user9253
Joined: 28 Mar 2008
Posts: 1928
Location: Riley TWP Michigan
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| Posted: Tue Feb 03, 2015 7:43 am Post subject: Re: Electrical System with Dual Batteries & Brownout Pre |
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Updated pdf Feb 3, 2015
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Joe Gores |
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user9253
Joined: 28 Mar 2008
Posts: 1928
Location: Riley TWP Michigan
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| Posted: Wed Feb 04, 2015 9:11 am Post subject: Re: Electrical System with Dual Batteries & Brownout Pre |
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I removed the electrically dependent engine circuits from my previous posting. Attached is a wiring diagram based on Z-19 but with the addition of a second E-Bus relay. If the engine is started using only one of the batteries, the other battery will prevent brownout of the avionics.
Joe
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
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| Description: |
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Download |
| Filename: |
Dual Cranking Bat with Brownout.pdf |
| Filesize: |
95.92 KB |
| Downloaded: |
318 Time(s) |
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Joe Gores |
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