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capacitor durability

 
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kenryan



Joined: 20 Oct 2009
Posts: 275

PostPosted: Thu Jan 11, 2018 12:40 pm    Post subject: capacitor durability Reply with quote

So yesterday I received my shiny new 33000 micro farad capacitor, for use with my Silent Hektik regulator. Within five minutes, I had managed to drop it from a height of three feet onto my hardwood floor. The floor is fine, but I wonder about the capacitor. How likely is it that it was damaged? How would such damage show up?

Ken


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wrmaxwell(at)bigpond.com
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PostPosted: Thu Jan 11, 2018 2:49 pm    Post subject: capacitor durability Reply with quote

Extremely unlikely to be damaged Ken, provided of course tthat the terminals weren't broken off.

Bill

On 12/01/2018 7:38 AM, Ken Ryan wrote:

Quote:
So yesterday I received my shiny new 33000 micro farad capacitor, for use with my Silent Hektik regulator. Within five minutes, I had managed to drop it from a height of three feet onto my hardwood floor. The floor is fine, but I wonder about the capacitor. How likely is it that it was damaged? How would such damage show up?

Ken



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kenryan



Joined: 20 Oct 2009
Posts: 275

PostPosted: Fri Jan 12, 2018 8:23 am    Post subject: capacitor durability Reply with quote

The terminals are fine. How would one know that a capacitor was not working properly in a (for example) Rotax installation? I know some guys don't even use the capacitor.

On Thu, Jan 11, 2018 at 1:18 PM, Bill Maxwell <wrmaxwell(at)bigpond.com (wrmaxwell(at)bigpond.com)> wrote:
Quote:

Extremely unlikely to be damaged Ken, provided of course tthat the terminals weren't broken off.

Bill

On 12/01/2018 7:38 AM, Ken Ryan wrote:

Quote:
So yesterday I received my shiny new 33000 micro farad capacitor, for use with my Silent Hektik regulator. Within five minutes, I had managed to drop it from a height of three feet onto my hardwood floor. The floor is fine, but I wonder about the capacitor. How likely is it that it was damaged? How would such damage show up?

Ken





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nuckolls.bob(at)aeroelect
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PostPosted: Fri Jan 12, 2018 10:05 am    Post subject: capacitor durability Reply with quote

At 02:38 PM 1/11/2018, you wrote:
Quote:
So yesterday I received my shiny new 33000 micro farad capacitor, for use with my Silent Hektik regulator. Within five minutes, I had managed to drop it from a height of three feet onto my hardwood floor. The floor is fine, but I wonder about the capacitor. How likely is it that it was damaged? How would such damage show up?

If the case is not dented, the cap is probably
just fine. Even if it IS dented, risk to functionality
is low. Failure would show up as excessive leakage
precipitating a venting event. Generally nothing spectacular.


Bob . . .


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kenryan



Joined: 20 Oct 2009
Posts: 275

PostPosted: Fri Jan 12, 2018 10:13 am    Post subject: capacitor durability Reply with quote

Thanks. I will pretend nothing happened.
On Jan 12, 2018 09:09, "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:
Quote:
At 02:38 PM 1/11/2018, you wrote:
Quote:
So yesterday I received my shiny new 33000 micro farad capacitor, for use with my Silent Hektik regulator. Within five minutes, I had managed to drop it from a height of three feet onto my hardwood floor. The floor is fine, but I wonder about the capacitor. How likely is it that it was damaged? How would such damage show up?

  If the case is not dented, the cap is probably
  just fine. Even if it IS dented, risk to functionality
  is low. Failure would show up as excessive leakage
  precipitating a venting event. Generally nothing spectacular.


  Bob . . .


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wrmaxwell(at)bigpond.com
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PostPosted: Fri Jan 12, 2018 1:41 pm    Post subject: capacitor durability Reply with quote

It can be tested both for its capacitance and for ESR, for both which you would need the appropriate instrument. Hardly worth investing in these if your only use is on this application. If you know a friendly amateur radio operator, he or she should be able to do that for you, or know of somebody who has the test instruments.
A simple test would be to put it across a battery and let it charge up, then remove it and measure the voltage stored in the capacitor. Should be close to the battery's voltage. Mind you don't touch both terminals though, as it is capable of dumping its charge quickly into your body, a trick I recall being often employed in high school physics classes.

A capacitor is a relatively simple device. In this application, it sits across the DC supply from the alternator and regulator, where it smooths out any remaining AC spikes that might otherwise show up as noise in your radio or otherwise interfere with the proper operation of your avionics. 

On 13/01/2018 3:22 AM, Ken Ryan wrote:

Quote:
The terminals are fine. How would one know that a capacitor was not working properly in a (for example) Rotax installation? I know some guys don't even use the capacitor.

On Thu, Jan 11, 2018 at 1:18 PM, Bill Maxwell <wrmaxwell(at)bigpond.com (wrmaxwell(at)bigpond.com)> wrote:
Quote:

Extremely unlikely to be damaged Ken, provided of course tthat the terminals weren't broken off.

Bill

On 12/01/2018 7:38 AM, Ken Ryan wrote:

Quote:
So yesterday I received my shiny new 33000 micro farad capacitor, for use with my Silent Hektik regulator. Within five minutes, I had managed to drop it from a height of three feet onto my hardwood floor. The floor is fine, but I wonder about the capacitor. How likely is it that it was damaged? How would such damage show up?

Ken








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kenryan



Joined: 20 Oct 2009
Posts: 275

PostPosted: Fri Jan 12, 2018 2:30 pm    Post subject: capacitor durability Reply with quote

Thx Bill!

Sent from my Android. Sorry Steve.
On Jan 12, 2018 12:45, "Bill Maxwell" <wrmaxwell(at)bigpond.com (wrmaxwell(at)bigpond.com)> wrote:
Quote:

It can be tested both for its capacitance and for ESR, for both which you would need the appropriate instrument. Hardly worth investing in these if your only use is on this application. If you know a friendly amateur radio operator, he or she should be able to do that for you, or know of somebody who has the test instruments.
A simple test would be to put it across a battery and let it charge up, then remove it and measure the voltage stored in the capacitor. Should be close to the battery's voltage. Mind you don't touch both terminals though, as it is capable of dumping its charge quickly into your body, a trick I recall being often employed in high school physics classes.

A capacitor is a relatively simple device. In this application, it sits across the DC supply from the alternator and regulator, where it smooths out any remaining AC spikes that might otherwise show up as noise in your radio or otherwise interfere with the proper operation of your avionics. 

On 13/01/2018 3:22 AM, Ken Ryan wrote:

Quote:
The terminals are fine. How would one know that a capacitor was not working properly in a (for example) Rotax installation? I know some guys don't even use the capacitor.

On Thu, Jan 11, 2018 at 1:18 PM, Bill Maxwell <wrmaxwell(at)bigpond.com (wrmaxwell(at)bigpond.com)> wrote:
Quote:

Extremely unlikely to be damaged Ken, provided of course tthat the terminals weren't broken off.

Bill

On 12/01/2018 7:38 AM, Ken Ryan wrote:

Quote:
So yesterday I received my shiny new 33000 micro farad capacitor, for use with my Silent Hektik regulator. Within five minutes, I had managed to drop it from a height of three feet onto my hardwood floor. The floor is fine, but I wonder about the capacitor. How likely is it that it was damaged? How would such damage show up?

Ken










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