AJJewsbury:
During faults singles can be thrown violently apart due to the large currents and the resulting magnetic fields interacting. I wonder if it might be possible for the harsh switching of the current by the arcing fault to set up some small sympathetic vibrations between the singles within the trunking along the circuit length - which might then become audible at some point where the packing allowed a little movement and the cable happened to be close enough to the trunking wall for the sound not to be absorbed by the other cables.
- Andy.
Hi Andy,
Yes, maybe the location of the noise was the first place outside of the DB where there was a bit of slack and the cables could vibrate about a bit. I suppose this could have been repeated at other points along its route, but it would have been heard closest to where the fault was being switched from. Luckily none of the loads suffered any damage.
AJJewsbury:
During faults singles can be thrown violently apart due to the large currents and the resulting magnetic fields interacting. I wonder if it might be possible for the harsh switching of the current by the arcing fault to set up some small sympathetic vibrations between the singles within the trunking along the circuit length - which might then become audible at some point where the packing allowed a little movement and the cable happened to be close enough to the trunking wall for the sound not to be absorbed by the other cables.
- Andy.
Hi Andy,
Yes, maybe the location of the noise was the first place outside of the DB where there was a bit of slack and the cables could vibrate about a bit. I suppose this could have been repeated at other points along its route, but it would have been heard closest to where the fault was being switched from. Luckily none of the loads suffered any damage.
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