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DC generators

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wsknettl(at)centurytel.ne
Guest

Posted: Tue Aug 08, 2006 5:08 am Post subject: DC generators

Hello,

Can someone from yesteryear confirm that a Cessna with a 50 amp 

generator, 35 amp regulator and 35 amp main generator CB will not self 

destruct.



Thanks

Wes K

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Hopperdhh(at)aol.com
Guest

Posted: Tue Aug 08, 2006 9:06 am Post subject: DC generators

Wes,

  

 I guess I qualify.  It seems like the 50 amp generator should be very0 safe with a 35 amp regulator.

  

 Of course, this assumes that the regulator is adjusted right.  I would0 think that the 35 amp CB would trip is this is not the case.

  

 I could make wise cracks here, but I'll leave that for someone0 else!

  

 Dan Hopper

 Automotive Electrical Engineer, Ret.

  

  

 In a message dated 8/8/2006 9:12:19 A.M. Eastern Daylight Time,0 wsknettl(at)centurytel.net writes:

 -->0   AeroElectric-List message posted by: Wes K0   <wsknettl(at)centurytel.net>



Hello,

Can someone from yesteryear0   confirm that a Cessna with a 50 amp 

generator, 35 amp regulator and 35 amp0   main generator CB will not self 

destruct.



Thanks

Wes0 ========================== Use0 lities0 Day0   0                        0                       

  -->0 ==================================================              - NEW MATRONICS LIST WIKI -

_-=0 sp;0                        0 ->0 =========================p;0              - List Contribution Web Site0   0                        0 ==================================================



[/quote]

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nuckollsr(at)cox.net
Guest

Posted: Tue Aug 08, 2006 9:15 am Post subject: DC generators

At 08:04 AM 8/8/2006 -0500, you wrote:



 	  Quote: 	
		  



Hello,

Can someone from yesteryear confirm that a Cessna with a 50 amp generator, 

35 amp regulator and 35 amp main generator CB will not self destruct.


	


   The breaker seems undersized. There's no risk of "destruction" but

   a slight risk for nuisance tripping along with an inability to utilize

   the generator's full output capability due to the overly protective

   regulator.



   But if the present setup has been working "okay", there's probably

   no pressing reason to mess with it.



   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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brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Tue Aug 08, 2006 9:44 am Post subject: DC generators

On Aug 8, 2006, at 9:04 AM, Wes K wrote:



 	  Quote: 	
		   

 <wsknettl(at)centurytel.net>



 Hello,

 Can someone from yesteryear confirm that a Cessna with a 50 amp  

 generator, 35 amp regulator and 35 amp main generator CB will not  

 self destruct.


	


It will not self destruct. The over-current relay in the regulator  

will open at 35A and reduce the field current, reducing output. All  

you will see is the generator switch from constant voltage to  

constant current and the bus voltage will then drop.



The breaker sounds a bit undersized to me. You might get nuisance  

trips but if it is working, who am I to fight with success.



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

wsknettl(at)centurytel.ne
Guest

Posted: Wed Aug 09, 2006 6:31 am Post subject: DC Generators

Hello,

Thanks for the quick replies. I assumed as much but wanted to be sure I 

wasn't overlooking anything. In this case someone in the past installed 

the wrong generator. I was sure the 35 amp generator would not work with 

50 amp periphials safely but was not 100 percent sure on the 50 amp 

generator with 35 amp peripheals.



Thanks agian,

Wes K

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