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AZFlyer

Joined: 11 Jan 2006
Posts: 89
Location: Prescott, AZ

Posted: Sat Apr 04, 2009 8:09 am Post subject: CONTACTORS

List,



Have the 3300 with FWF kit from Jab.USA.  Have been reading everything I can find on "contactors" ( AeroElectric, various Matronics lists, etc.).  Do not understand most of it...  so, my question is: Do I need to add one or more "Contactor" to my installation?



I am not an EE, nor much of an electrician...just trying to understand what the Contactor might buy me.  Planning an all-glass panel, if that makes any difference?



Please don't throw electrical theory at me...I'm just looking for a simple explanation why I should or should not consider putting contactors on.  If so, which one?



Thanks,

Mike

- The Matronics Zenith601-List Email Forum -

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_________________
Mike Miller @ millrml@aol.com
601 XL-B, 3300, Dynon

Remember, "the second mouse gets the cheese"!

flyboy3847(at)onecommail.
Guest

Posted: Mon Apr 06, 2009 7:49 am Post subject: CONTACTORS

Contactors are nothing more than solenoids like on the starter of your car.

The aircraft needs a continuous duty contactor if you want to have a master

switch for your electrical system.  This should be located near the battery.

The starter contactor is placed in the battery area also so the starter

cable is not "hot" all the time.  It should be a contactor built for

intermittent duty.  Both are available from Aircraft Spruce.



Regards,

Leroy Wheeler N601LH



--

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Mon Apr 06, 2009 8:34 am Post subject: CONTACTORS

Whether or not you need a master contactor depends on how much current  

is being supplied to your system and where your battery is mounted. If  

you only have around 30 amps to control and your battery is mounted  

ahead of the firewall, you probably don't really need a master relay.  

You just have to make sure that nothing is drawing any current when  

your master switch or circuit breaker is off or you will will find the  

battery dead after sitting for a few days.



If you have very much more than 30 amps or your battery is mounted  

behind the seats with large cables running through the cabin, you  

probably should use a master relay. The master relay will isolate the  

battery from all circuits, including the starter circuit. The starter  

circuit can draw hundreds of amps and has no over-current protection.  

If the main battery cable to the starter shorts out for any reason,  

the results can be very serious. This could easily happen in a crash  

landing.



 	  Quote: 	
		  

 



 List,



 Have the 3300 with FWF kit from Jab.USA.  Have been reading  

 everything I can

 find on "contactors" ( AeroElectric, various Matronics lists,  

 etc.).  Do not

 understand most of it...  so, my question is: Do I need to add one  

 or more

 "Contactor" to my installation?



 I am not an EE, nor much of an electrician...just trying to  

 understand what

 the Contactor might buy me.  Planning an all-glass panel, if that  

 makes any

 difference?



 Please don't throw electrical theory at me...I'm just looking for a  

 simple

 explanation why I should or should not consider putting contactors  

 on.  If

 so, which one?



 Thanks,

 Mike


	


-- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

- The Matronics Zenith601-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?Zenith601-List

_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

Afterfxllc(at)aol.com
Guest

Posted: Mon Apr 06, 2009 9:51 am Post subject: CONTACTORS

It should be continuous duty for your master contactor. You would  use an intermittent contactor for your starter.

  

 Jeff

  	  Quote: 	
		  It    should be a contactor built for

intermittent duty. 	


 

  

 A Good Credit Score is 700450096/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID%3D62%26bcd%3DAprilfooterNO62"> See yours in just 2 easy steps!

  [quote][b]

- The Matronics Zenith601-List Email Forum -

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flyboy3847(at)onecommail.
Guest

Posted: Mon Apr 06, 2009 10:07 am Post subject: CONTACTORS

yup  

         

  

From: owner-zenith601-list-server(at)matronics.com [mailto:owner-zenith601-list-server(at)matronics.com] On Behalf Of Afterfxllc(at)aol.com

 Sent: Monday, April 06, 2009 1:45 PM

 To: zenith601-list(at)matronics.com

 Subject: Re: Zenith601-List: CONTACTORS  

  

       

It should be continuous duty for your master contactor. You would use an intermittent contactor for your starter.  

    

   

    

Jeff  

   	  Quote: 	
		    

It should be a contactor built for

 intermittent duty.  	
  

    

   

  

       

  

A Good Credit Score is 700450096/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID%3D62%26bcd%3DAprilfooterNO62"> See yours in just 2 easy steps!   	  Quote: 	
		    http://www.matronics.com/Navigator?Zenith601-List 	
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     Checked by AVG.  Release Date: 4/6/2009 6:22 AM 

  Checked by AVG.

 4/6/2009 6:22 AM

     [quote][b]

- The Matronics Zenith601-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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AZFlyer

Joined: 11 Jan 2006
Posts: 89
Location: Prescott, AZ

Posted: Wed Apr 08, 2009 8:33 am Post subject: Re: CONTACTORS

List,



Thanks for all the feedback on the contactor question.  Got what I need.



signed,

Electrically Challenged (Mike)

- The Matronics Zenith601-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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_________________
Mike Miller @ millrml@aol.com
601 XL-B, 3300, Dynon

Remember, "the second mouse gets the cheese"!

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