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Emissivity
09-15-2014, 04:53 PM (This post was last modified: 09-15-2014 05:00 PM by live2wheel700.)
Post: #1
Emissivity
How can one determine the emissivity of an object without being able to place a known value on it (33 tape) or without touching it?
This question mostly pertains to electrical connections that are outdoors with line voltages from 7.2 kv to 230 kv.
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09-16-2014, 03:17 AM
Post: #2
RE: Emissivity
(09-15-2014 04:53 PM)live2wheel700 Wrote:  How can one determine the emissivity of an object without being able to place a known value on it (33 tape) or without touching it?
This question mostly pertains to electrical connections that are outdoors with line voltages from 7.2 kv to 230 kv.

Ahh yes, you have spotted the issue with sticking tape onto live electrical components. The tendency is not to do this, unless you are particularly intellectually challenged.


You have to have a similar object in similar condition that is offline and measure it, then you have to apply the emissivity for the sample to the live component. It will not be exactly the same but it will be close enough, and it is the best that you can achieve. Eventually you will become very good at guessing the emissivity of your own components from experience and the appearance of the object.


Hope this helps
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09-18-2014, 09:20 PM
Post: #3
RE: Emissivity
Real good idea. I did not think of doing that .
Thank You
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