REFLECTOR: Electrical Diagram

[Glenn Falkenberg]

Hi Patrick
I have the same question as Brian.  When the secondary alternator transfers
over to power to the main bus, it looks like the transfer relay supplies
power to the emergency bus from the backup battery.  Are your batteries
connected to the system via relays or switches?  From your schematic it
looks like relays. Another question, does the VP-X remove power from the
transfer relay in the event of the second alternator fault?  If it does
remove power, the relay will relax and you wont have power available from
the backup battery. This would also remove power from the emergency bus.  I
really like the concept of running essential and non-essential buses off
two alternators.


On Sun, Dec 29, 2013 at 3:16 PM, Patrick Sieders <pjsieders at comcast.net>wrote:

> Hello All,
>
>
>
> I have been working on my electrical diagram for a while now and I am
> about to put it in the airplane. But, it’s always nice to have a second
> look (or a third, fourth…….) , especially someone with experience with the
> VP-X system. And so I present to you my simplified main power system. Now I
> know that this might spark a discussion about how simple your electrical
> system should be, I understand, but that is not what I asked for help.
>
>
>
> A little explanation : I wanted to use both my alternators at the same
> time, on separate busses. The VP-X as you might know, only accepts one at a
> time. So I made a circuit that makes it possible for my backup alternator
> to disconnect from the non essential bus (seat heat etc.) and connect to
> the main bus in the event my main alternator quits. If the backup
> alternator quits as well, then the main battery will be used for emergency
> power, which depletes. The backup battery will feed emergency instruments
> via power input #2 on those particular instruments, when the power of the
> main batt drops below it’s own level.
>
>
>
> My question is for you to find any scenario and/or electrical situation
> that can occur which would be detrimental to the system. Ask me questions
> if you have them.
>
>
>
> Thanks for your participation, and if I do not speak to you until the new
> year, Many blue skies and soft landings for 2014 !
>
>
>
> Patrick
>
>
>
>
>
> Patrick & Dana Sieders
>
> 7244 Sugarloaf Drive
>
> Nashville TN 37211
>
>
>
> Tel. 615-250-2304
>
> Cell P. 615-918-2698
>
> Cell D. 615-918-2699
>
>
>
> Email. Js3201 at comcast.net
>
> Http://www.sieders.com/sieders
>
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