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Old Sep 4th 2017, 04:09 AM   #1
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Compass not show fault on a high-voltage line

Hello,
I have a question:

Why does the compass not show fault on a high-voltage line even though it is surrounded by a magnetic field?
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Old Sep 4th 2017, 06:32 AM   #2
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I think your question is too vague.

What sort of fault are you describing?
Are you trying to detect the difference between a clear line and a faulty line?
or
Are you trying to detect the position along a faulty line at which the fault occurs?
or ...
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Old Sep 4th 2017, 07:37 AM   #3
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Why the compass does not show a fault in an electric power transmission even though it is being surrounded by a magnetic field?

Good now?
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Old Sep 4th 2017, 06:47 PM   #4
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Originally Posted by stevenking10 View Post
Why the compass does not show a fault in an electric power transmission even though it is being surrounded by a magnetic field?

Good now?

What does "not show fault" mean? Around a power line the direction of the magnetic field is changing with a frequency of 60 Hz. Since a compass needle can't respond to changes in direction that quickly it points in the direction of the average which is aligned with the earth's magnetic field.
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