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Are 'serial' contactors really needed?
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bobsv35b(at)aol.com
Guest

Posted: Sun Jul 20, 2014 11:11 am Post subject: Are 'serial' contactors really needed?

Test Too!

   

  Old Bob

   

   

     	  Quote: 	
		   	


  

     

  [quote][b]

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user9253

Joined: 28 Mar 2008
Posts: 1938
Location: Riley TWP Michigan

Posted: Sun Jul 20, 2014 12:31 pm Post subject: O.V. Module

John,

Is the O.V. module being installed in an experimental airplane?

What make and model is it?

Are we talking about an alternator or dynamo or generator?

Is there an external voltage regulator?

Is this an existing electrical system that you are adding an O.V. module to?

If there is an existing alternator and external voltage regulator, then there should also be a fuse or circuit breaker that supplies power to the voltage regulator.  The O.V. module needs to be connected between the 5 amp circuit breaker and the voltage regulator (which is part of the field circuit).

Good advice can not be given without knowing all of the facts.

It is better to not install an O.V. module than to install it incorrectly.

 	  Quote: 	
		  . . . .you may want to refer to my email again for all details thank you ! 	


I can not find your original posting.

 	  Quote: 	
		  why am I getting everybody's questions and answers to me from other people 	


Because you are posting in someone else's thread.

 	  Quote: 	
		  

do I still need to change to a voltage limiter on the firewall ?if so what is it ? 	


Do you mean current limiter?  It is sort of a robust very slow blow fuse.

Search for MIDI fuse or ANL fuse.  A current limiter is a good idea, but is unrelated to the O.V. module.

 	  Quote: 	
		  do I split the regulator in or split the field the field has the breaker on & the regulator in doesn't 	


Sorry, I do not understand that.  If installing an O.V. module to an existing

electrical system, no splitting is necessary.  Connect the O.V. module to the wire that goes between the 5 amp breaker and the voltage regulator.

Joe

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_________________
Joe Gores

nuckolls.bob(at)aeroelect
Guest

Posted: Sun Jul 20, 2014 6:59 pm Post subject: Are 'serial' contactors really needed?

At 06:13 AM 7/20/2014, you wrote:

 	  Quote: 	
		  I tried using five amp breaker it won't kick the alternator in

have to have a 60 amp I guess



Sent from my iPhone


	


   A picture may be worth 10,000 words . . . but 10,000

   words never describes the same picture in the

   minds of all readers.



   Are you wiring to a published schematic that

   we can download and all pray over at the same

   time? If you've modified a published schematic,

   then a scanned copy of your changes will

   offer all of us a reasonable chance of understanding

   your design goals and offering a solution.



   Bob . . .

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nuckolls.bob(at)aeroelect
Guest

Posted: Sun Jul 20, 2014 7:04 pm Post subject: Are 'serial' contactors really needed?

At 06:13 AM 7/20/2014, you wrote:

 	  Quote: 	
		  I tried using five amp breaker it won't kick the alternator in

have to have a 60 amp I guess



Sent from my iPhone


	


   A picture may be worth 10,000 words . . . but 10,000

   words never describes the same picture in the

   minds of all readers.



   Are you wiring to a published schematic that

   we can download and all pray over at the same

   time? If you've modified a published schematic,

   then a scanned copy of your changes will

   offer all of us a reasonable chance of understanding

   your design goals and offering a solution.



   Bob . . .

- 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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acub(at)neo.rr.com
Guest

Posted: Mon Jul 21, 2014 4:27 am Post subject: Are 'serial' contactors really needed?

yes I'm using the B&C schematic with an external regulator ,(no changes) it says  to hook the ovm to regulator in & to the master switch .

I want to hook it to the field which has a five amp breaker .

I'm asking why I can't do that instead of the regulator in?

Sent from my iPhone

 	  Quote: 	
		   On Jul 20, 2014, at 4:41 PM, "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com> wrote:

 At 06:13 AM 7/20/2014, you wrote:

> I tried using five amp breaker it won't kick the alternator in

> have to have a 60 amp I guess

> 

> Sent from my iPhone

  A picture may be worth 10,000 words . . . but 10,000

  words never describes the same picture in the

  minds of all readers.

  Are you wiring to a published schematic that

  we can download and all pray over at the same

  time? If you've modified a published schematic,

  then a scanned copy of your changes will

  offer all of us a reasonable chance of understanding

  your design goals and offering a solution.

  Bob . . .

- 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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acub(at)neo.rr.com
Guest

Posted: Mon Jul 21, 2014 4:38 am Post subject: Are 'serial' contactors really needed?

this is an alternator with an external regulator (system by Interav, using their schematic and B&C schematic ) it's a Motorola Alternator previously installed an experimental RV8 

my intention is to use the field instead of the regulator in ,being how the field already has a 5 amp breaker to kick ,

(it is also controlling the regulator ) 

Thank You for your time & advice it's greatly appreciated and very helpful!

John

Sent from my iPhone

 	  Quote: 	
		   On Jul 20, 2014, at 4:31 PM, "user9253" <fransew(at)gmail.com> wrote:

 John,

 Is the O.V. module being installed in an experimental airplane?

 What make and model is it?

 Are we talking about an alternator or dynamo or generator?

 Is there an external voltage regulator?

 Is this an existing electrical system that you are adding an O.V. module to?

 If there is an existing alternator and external voltage regulator, then there should also be a fuse or circuit breaker that supplies power to the voltage regulator.  The O.V. module needs to be connected between the 5 amp circuit breaker and the voltage regulator (which is part of the field circuit).

 Good advice can not be given without knowing all of the facts.

 It is better to not install an O.V. module than to install it incorrectly.

> . . . .you may want to refer to my email again for all details thank you !

 I can not find your original posting.

> why am I getting everybody's questions and answers to me from other people

 Because you are posting in someone else's thread.

> 

> do I still need to change to a voltage limiter on the firewall ?if so what is it ?

 Do you mean current limiter?  It is sort of a robust very slow blow fuse.

 Search for MIDI fuse or ANL fuse.  A current limiter is a good idea, but is unrelated to the O.V. module.

> do I split the regulator in or split the field the field has the breaker on & the regulator in doesn't

 Sorry, I do not understand that.  If installing an O.V. module to an existing

 electrical system, no splitting is necessary.  Connect the O.V. module to the wire that goes between the 5 amp breaker and the voltage regulator.

 Joe

 --------

 Joe Gores

 Read this topic online here:

 http://forums.matronics.com/viewtopic.php?p=427018#427018

- 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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user9253

Joined: 28 Mar 2008
Posts: 1938
Location: Riley TWP Michigan

Posted: Mon Jul 21, 2014 6:40 am Post subject: Re: Are 'serial' contactors really needed?

 	  Quote: 	
		  it says to hook the ovm to regulator in & to the master switch 	


No it doesn't.

B&C schematic link: http://www.bandc.biz/pdfs/OVM_wiringdiagram.pdf

The B&C schematic shows the black wire of the O.V. module connected to ground.  They just happened to use the same ground that the master switch is connected to.  You can connect the black wire to any convenient ground.

I think that B&C drew the schematic that way for two reasons: 1. It is easy to draw.  2. It is easy to wire directly at the master switch because both ground and the alternator field circuit are available there (if your master switch is wired like B&C's switch is wired).

As for the colored wire (orange?) of the O.V., B&C shows it connected to the alternator-field half of the master switch.  Electrically speaking, this is the same as connecting to the voltage regulator input.  In either case, power is coming from the 5 amp breaker.

Now if you want to connect the O.V. module directly to the 5 amp breaker, I see no reason why that will not work.  I hope others will correct me if wrong.  Just make sure that it is connected to the down stream side and not the always hot side of the breaker.

  In summary, connect the O.V. black wire to ground.  And connect the other wire to some point between the 5 amp breaker and the input to the voltage regulator.

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:

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_________________
Joe Gores

acub(at)neo.rr.com
Guest

Posted: Mon Jul 21, 2014 9:36 am Post subject: Are 'serial' contactors really needed?

I understand !! I thank you very very very much you guys are lifesaver it's a please  dealing with you and your staff !!

Thank You 

John



Sent from my iPhone



 	  Quote: 	
		   On Jul 21, 2014, at 10:40 AM, "user9253" <fransew(at)gmail.com> wrote:

 

 

 

 

> it says to hook the ovm to regulator in & to the master switch

 

 No it doesn't.

 B&C schematic link: http://www.bandc.biz/pdfs/OVM_wiringdiagram.pdf

 The B&C schematic shows the black wire of the O.V. module connected to ground.  They just happened to use the same ground that the master switch is connected to.  You can connect the black wire to any convenient ground.

 I think that B&C drew the schematic that way for two reasons: 1. It is easy to draw.  2. It is easy to wire directly at the master switch because both ground and the alternator field circuit are available there (if your master switch is wired like B&C's switch is wired).

 As for the colored wire (orange?) of the O.V., B&C shows it connected to the alternator-field half of the master switch.  Electrically speaking, this is the same as connecting to the voltage regulator input.  In either case, power is coming from the 5 amp breaker.

 Now if you want to connect the O.V. module directly to the 5 amp breaker, I see no reason why that will not work.  I hope others will correct me if wrong.  Just make sure that it is connected to the down stream side and not the always hot side of the breaker.

  In summary, connect the O.V. black wire to ground.  And connect the other wire to some point between the 5 amp breaker and the input to the voltage regulator.

 Joe

 

 --------

 Joe Gores

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=427062#427062

- 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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