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don.honabach(at)pcperfect
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 Posted: Wed Jul 05, 2006 9:19 am Post subject: Battery Contactor - HOT... |
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I’m in the process of wiring up my panel and noticed that the battery contactor gets fairly hot (don’t have an exact temperature, but so hot that you wouldn’t leave your finger on it for more than a second, but probably not hot enough to burn you in any ‘real’ way).
Since I’m only running between 1 to 2A rights now during testing (just a few instruments connected), I’m assuming the heat is being generated by the contactor’s internal ‘switch mechanism’. It also appears to be hottest at the bottom of the contactor.
Is this normal?
In case you’re curious, the unit is a continuous duty contactor and meant for this type of application.
As always, thanks in advance for your help!
Don
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Gilles.Thesee(at)ac-greno
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| Posted: Wed Jul 05, 2006 9:28 am Post subject: Battery Contactor - HOT... |
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Don Honabach a écrit :
| Quote: |
I’m in the process of wiring up my panel and noticed that the battery
contactor gets fairly hot (don’t have an exact temperature, but so hot
that you wouldn’t leave your finger on it for more than a second, but
probably not hot enough to burn you in any ‘real’ way).
Hi Don,
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This seems quite normal to me.
Regards,
Gilles Thesee
Grenoble, France
http://contrails.free.fr
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brian
Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA
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| Posted: Wed Jul 05, 2006 10:10 am Post subject: Battery Contactor - HOT... |
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On Jul 5, 2006, at 1:14 PM, Don Honabach wrote:
| Quote: | I’m in the process of wiring up my panel and noticed that the
battery contactor gets fairly hot (don’t have an exact temperature,
but so hot that you wouldn’t leave your finger on it for more than
a second, but probably not hot enough to burn you in any ‘real’
way). ...
Is this normal?
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Yes. There is about 1A flowing through the coil to hold the contactor
closed. Since it is not doing any other work that 1A at 12V is turned
into 12 watts of heat. That is enough to make the contactor get quite
warm. But that is how it is designed to work.
Brian Lloyd 361 Catterline Way
brian-yak AT lloyd DOT com Folsom, CA 95630
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
— Antoine de Saint-Exupéry
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_________________
Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery |
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FLYaDIVE(at)aol.com
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| Posted: Wed Jul 05, 2006 10:36 am Post subject: Battery Contactor - HOT... |
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In a message dated 7/5/06 1:22:49 PM Eastern Daylight Time,
don.honabach(at)pcperfect.com writes:
| Quote: | Since I'm only running between 1 to 2A rights now during testing (just a
few instruments connected), I'm assuming the heat is being generated by
the contactor's internal 'switch mechanism'. It also appears to be
hottest at the bottom of the contactor.
=========================================
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Don:
I can understand WARM but not HOT! I honestly have never checked the
temperature of the Master or Starter relays but so hot that you can't touch it and
keep your fingers on it does NOT seem correct.
My first thought is ... Did you Mix Up the relays? The Master Relay is rated
as CONTINUOUS DUTY while the Starter Relay is rated only INTERMITTENT DUTY.
If you mixed them up then SURE! The one used as Master would get HOT ...
Probably Very HOT!
Barry
"Chop'd Liver"
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martygmartin(at)gmail.com
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| Posted: Thu Jul 06, 2006 7:02 pm Post subject: Battery Contactor - HOT... |
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I have wing tip (3 light, white, (red or greed) & strobe. I'm putting the firewall together, no engine to rehang as this was a flying Q200 to begin with.
I woundering if I can just connect the battery to the leads that go to the battery and check the lights for working condition.
Maybe I need to wait and rehang the motor.
Please let me know.
Greg Martin, martygmartin(at)gmail.com (martygmartin(at)gmail.com)
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klehman(at)albedo.net
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| Posted: Fri Jul 07, 2006 4:38 am Post subject: Battery Contactor - HOT... |
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Go for it Marty.
I don't see how you can harm anything as long as you don't have any bare
wires hanging there that might short. Was there some particular concern
that you had?
Ken
Marty Martin wrote:
| Quote: |
I have wing tip (3 light, white, (red or greed) & strobe. I'm putting
the firewall together, no engine to rehang as this was a flying Q200
to begin with.
I woundering if I can just connect the battery to the leads that go to
the battery and check the lights for working condition.
Maybe I need to wait and rehang the motor.
Please let me know.
Greg Martin, martygmartin(at)gmail.com <mailto:martygmartin(at)gmail.com>
|
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nuckollsr(at)cox.net
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| Posted: Fri Jul 07, 2006 5:50 am Post subject: Battery Contactor - HOT... |
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Didn't get to this one earlier. Battery contactors routinely run too hot
to touch but not too hot to operate properly. See:
http://www.aeroelectric.com/Pictures/Contactors/Battery_Contactor_Temps_1.jpg
http://www.aeroelectric.com/Pictures/Contactors/Battery_Contactor_Temps_2.jpg
Bob . . .
At 08:38 AM 7/7/2006 -0400, you wrote:
| Quote: |
Go for it Marty.
I don't see how you can harm anything as long as you don't have any bare
wires hanging there that might short. Was there some particular concern
that you had?
Ken
Marty Martin wrote:
>I have wing tip (3 light, white, (red or greed) & strobe. I'm putting
>the firewall together, no engine to rehang as this was a flying Q200 to
>begin with.
>
>I woundering if I can just connect the battery to the leads that go to
>the battery and check the lights for working condition.
>
>Maybe I need to wait and rehang the motor.
>
>Please let me know.
>Greg Martin, martygmartin(at)gmail.com <mailto:martygmartin(at)gmail.com>
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Bob . . .
---------------------------------------------------------
< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >
---------------------------------------------------------
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don.honabach(at)pcperfect
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| Posted: Fri Jul 07, 2006 10:26 am Post subject: Battery Contactor - HOT... |
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Thanks Everyone - Much appreciated.
Don
Do not archive
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