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Automatic way to turn On the Standby alternator

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ceengland7(at)gmail.com
Guest

Posted: Tue Feb 02, 2016 6:43 pm Post subject: Automatic way to turn On the Standby alternator

A mechanical failure in that single       switch could take out both alternators. is that acceptable?

       

       Needing to turn both off would imply that both have failed       'shorted' and are trying to drain the battery. Not likely, but       separate switches fix that, too.

       

       Charlie

       

       On 2/2/2016 5:39 PM, Carlos Trigo wrote:

     

      	  Quote: 	
		                         <![endif]-->   <![endif]-->                

Eric         

Â          

That is brilliantly simple!         

Do you think this is a reliable solution?         

Â          

And, in your opinion, should I have the             possibility of turning OFF both alternators simultaneously?         

Â          

CT                     

Â            

Â          

         

Â                                  

From:                 owner-aeroelectric-list-server(at)matronics.com (owner-aeroelectric-list-server(at)matronics.com)                 [mailto:owner-aeroelectric-list-server(at)matronics.com (owner-aeroelectric-list-server(at)matronics.com)] On                   Behalf Of Eric Page

                 Sent: terÃ§a-feira, 2 de Fevereiro de 2016 23:13

                 To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com)

                 Subject: Re: RE: Automatic way                 to turn On the Standby alternator           

         

         

Â                     

Yes, a single-pole double-throw, ON-ON             switch. Â Ground on the common tab, main alternator control             to your VP-X on one side, standby on the other. Â This will,             of course, offer no way to disable both alternators             simultaneously, unless you use an ON-OFF-ON switch.

             

             Eric         

                    

Â          

                    



             On Feb 2, 2016, at 2:35 PM, Carlos Trigo <[url=mailto:trigo(at)mail.telepac.pt]trigo(at)mail.telepac.pt (trigo(at)mail.telepac.pt)[/url]>             wrote:         

          	  Quote: 	
		             

Thanks again for your eloquent explanations.           

However, I probably didnâ€™t make myself clear               about my idea.           

Â            

In my system (switches working through the               VP-X box), turning Off the MAIN Alternator field switch               means interrupting a ground wire.           

And turning On the Standby Alternator means               connecting a ground wire.           

(Switches in the Vertical Power system work               by connecting or disconnecting ground to the assigned pins               in their red box)           

Â            

Therefore, what I need to design is simply an               electrical way to accomplish the following action:            

Â Â when I flip the Main ALT switch to Off               (interrupting a ground wire), this same action               automatically connects the ground wire that switches the               STBY ALT field           

Â            

Is there a simple and elegant solution to do               this?           

Â            

Cheers           

Carlos         	
       

                                        Este e-mail foi enviado a               partir de um computador sem vÃrus protegido pela Avast. 

               www.avast.com

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glastar(at)gmx.net
Guest

Posted: Tue Feb 02, 2016 10:32 pm Post subject: Automatic way to turn On the Standby alternator

Carlos,



can't the VP-X do that logic, did you check with them?



Cheers Werner



On 02.02.2016 23:35, Carlos Trigo wrote:

 	  Quote: 	
		   Thanks again for your eloquent explanations.



 However, I probably didn’t make myself clear about my idea.



 In my system (switches working through the VP-X box), turning Off the

 MAIN Alternator field switch means interrupting a ground wire.



 And turning On the Standby Alternator means connecting a ground wire.



 (Switches in the Vertical Power system work by connecting or

 disconnecting ground to the assigned pins in their red box)



 Therefore, what I need to design is simply an electrical way to

 accomplish the following action:



    when I flip the Main ALT switch to Off (interrupting a ground wire),

 this same action automatically connects the ground wire that switches

 the STBY ALT field



 Is there a simple and elegant solution to do this?



 Cheers



 Carlos

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ceengland7(at)gmail.com
Guest

Posted: Wed Feb 03, 2016 7:32 am Post subject: Automatic way to turn On the Standby alternator

Rene', if your battery is a bit down       from sitting a while, then starting, the alt might well try to       supply its full rated amps when engine rpm comes up enough to       power it to full output. 60A breaker on 70A alternator, done....

       

       On 2/3/2016 9:18 AM, Rene wrote:

     

      	  Quote: 	
		                         <![endif]-->   <![endif]-->                

I               would say yes.Â  Most A/C have a master switch of some kind               so that all power can be removed.Â  Depending on how you               wire itâ€¦..the master switch may or may not do the job.         

Â          

I             elected to have separate switches to control the             Alternators.Â  I can run them at the same time, but my backup             is set lower so I am guessing it would never contribute as             long as the primary was working.Â  I also have extra battery             powerâ€¦..I really do not need an alternator to finish any             reasonable flight.Â  With a little load shedding I am good             for 2-3 hours.Â  Unless I lose my alternator on take off at             nightâ€¦.I am all set for any flight I take.         

Â          

BTW,             I have tested this in real conditions twice and it works             fine.Â  I changed my alternator to a 70 amp version but did             not change the breaker.Â  I donâ€™t know how because I do not             have 70 amps worth of load, but the 60 amp break tripped             twice on a long cross country when I transmitted shortly             after takeoff.Â  No problems since I upgraded the breaker.Â              Both flights were completed on the backup battery with the             main battery being used as a reserve.Â  (main battery is a             925 and backup is a 680)Â  I have an 8 amp backup alternator             which does not keep up with basic loadâ€¦â€¦but extends the             flight time way past the fuel limit.         

Â                     

Rene'           

801-721-6080         

         

Â                                  

From:                 owner-aeroelectric-list-server(at)matronics.com (owner-aeroelectric-list-server(at)matronics.com)                 [mailto:owner-aeroelectric-list-server(at)matronics.com (owner-aeroelectric-list-server(at)matronics.com)] On                   Behalf Of Carlos Trigo

                 Sent: Wednesday, February 03, 2016 7:51 AM

                 To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com)

                 Subject: RE: RE: Automatic way                 to turn On the Standby alternator           

         

         

Â          

Bob         

Â                     

I               imply from your (very short) answer that I must be able to               turn off both alternators in flight, right?           

Â            

CarlosÂ                           

Â          

         

Â                                  

From:                 owner-aeroelectric-list-server(at)matronics.com (owner-aeroelectric-list-server(at)matronics.com)                 [mailto:owner-aeroelectric-list-server(at)matronics.com (owner-aeroelectric-list-server(at)matronics.com)]                 On Behalf Of Robert L. Nuckolls, III

                 Sent: quarta-feira, 3 de Fevereiro de 2016 13:27

                 To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com)

                 Subject: Re: RE: Automatic way                 to turn On the Standby alternator           

         

         

Â           	  Quote: 	
		             

Since I've never designed               an aircraft electrical system, much less built one, I'll               leave it others to advise whether you should be able to               turn both alternators off.Â  Bob?         	
         



             Â  Smoke in the cockpit?

             

             

                      

Â  Bob . . .                                                                  

Este                     e-mail foi enviado a partir de um computador sem                     vÃrus protegido pela Avast. 

                     www.avast.com                                                                              

Â

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richard.beebe(at)yale.edu
Guest

Posted: Wed Feb 03, 2016 10:11 am Post subject: Automatic way to turn On the Standby alternator

Two weeks ago I had the beginnings of an electrical fire in the cockpit 

so turning off ALL sources of power to the panel is a very important 

safety feature to me.



A pin in a nylon connector (AMP Mate N Lock connector) came loose and 

overheated melting the connector and releasing a cloud of smoke. I hit 

the master and it stopped. To be fair I later discovered the breaker had 

also popped but if it hadn't I could have had a really really bad situation.



--Rick



On 02/03/2016 12:21 PM, Robert L. Nuckolls, III wrote:

 	  Quote: 	
		   At 08:51 AM 2/3/2016, you wrote:

> Bob

>

> I imply from your (very short) answer that I must be able to turn off

> both alternators in flight, right?



    Your choice. The probability is rare but

    not zero. In a TC aircraft, ABSOLUTE control

    over all ship's power sources is a

    requirement.



    Bob . . .

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trigo(at)mail.telepac.pt
Guest

Posted: Wed Feb 03, 2016 10:33 am Post subject: Automatic way to turn On the Standby alternator

Ok, ok, don't shoot!

I will put 2 separate switches...

Thanks to all

Carlos

Enviado do meu iPhone

No dia 03/02/2016, Ã s 18:09, Rick Beebe <richard.beebe(at)yale.edu> escreveu:

 	  Quote: 	

 Two weeks ago I had the beginnings of an electrical fire in the cockpit so turning off ALL sources of power to the panel is a very important safety feature to me.

 A pin in a nylon connector (AMP Mate N Lock connector) came loose and overheated melting the connector and releasing a cloud of smoke. I hit the master and it stopped. To be fair I later discovered the breaker had also popped but if it hadn't I could have had a really really bad situation.

 --Rick

> On 02/03/2016 12:21 PM, Robert L. Nuckolls, III wrote:

> At 08:51 AM 2/3/2016, you wrote:

>> Bob

>> 

>> I imply from your (very short) answer that I must be able to turn off

>> both alternators in flight, right?

> 

>   Your choice. The probability is rare but

>   not zero. In a TC aircraft, ABSOLUTE control

>   over all ship's power sources is a

>   requirement.

> 

>   Bob . . .

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