Construction Cranes EM Induction

AI Thread Summary
Construction cranes can experience induced currents from distant antennas due to their design, which allows them to act like long antennas resonating at specific frequencies. This phenomenon occurs when electromagnetic fields from antennas reradiate and induce small currents in the crane's structure. The currents can be influenced by various factors, including the frequency of the signals and the proximity of the antennas. While the currents induced in cranes are typically small, they can still pose safety concerns. Further research and studies are needed to establish baselines and better understand this phenomenon.
SafetyConsult
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Can anyone explain why cranes in construction sometimes experience induced currents from antennas radiating from distances of up to several Kilometers.

I have looked into the phenomenon several times, and have not been able to find a study or baselines to follow. I have a basic understanding of how it happens (antenna theory and reradiation), but not a solid proof. Can anyone point me on the right direction.
 
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SafetyConsult said:
Can anyone explain why cranes in construction sometimes experience induced currents from antennas radiating from distances of up to several Kilometers.

I have looked into the phenomenon several times, and have not been able to find a study or baselines to follow. I have a basic understanding of how it happens (antenna theory and reradiation), but not a solid proof. Can anyone point me on the right direction.

What does it mean to "experience induced currents" ?
A crane could be thought as a long antenna resonating at certain frequencies, but the currents are indeed really small.

Even my body now is experiencing some induced currents due to 50Hz currents circulating in the cables.
 
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