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How do you test a circuit breaker?

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r.r.hall(at)cox.net
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Posted: Tue Dec 01, 2009 4:52 pm Post subject: How do you test a circuit breaker?

I recently came into possession of a variety of used Klixon circuit breakers from 5A to 80A. Is there any way to test them other than just on passes current and off doesn't? I would like to make sure they are actually protecting the circuit before I use them in an application.



Any suggestions?



Rodney Hall

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nuckolls.bob(at)aeroelect
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Posted: Tue Dec 01, 2009 5:19 pm Post subject: How do you test a circuit breaker?

At 06:49 PM 12/1/2009, you wrote:

 	  Quote: 	
		  



I recently came into possession of a variety of used Klixon circuit 

breakers from 5A to 80A. Is there any way to test them other than 

just on passes current and off doesn't? I would like to make sure 

they are actually protecting the circuit before I use them in an application.



Any suggestions?


	


   You can test them for gross function by simply hooking them

   across a battery using a length of wire, say 10 ft total

   of 12AWG or even 10AWG wire. If they open, they're "functional".



   These critters are exceedingly robust in their design. . .



http://aeroelectric.com/Pictures/Breakers/Klixon_1.jpg

http://aeroelectric.com/Pictures/Breakers/Klixon_2.jpg

http://aeroelectric.com/Pictures/Breakers/Klixon_3.jpg



   and not prone to "drifting" in terms of calibration.

   Even so, if any one "drifted" up 50% it would not

   represent a hazard. If it "drifted" down by 50% the

   worst thing that happens is that you get some nuisance

   trips and the breaker gets replaced.



   Chances that you're going to test these and find a

   bad one is very small.

        Bob . . .

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