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Switchgear Harmonic Vibration

Switchgear Harmonic Vibration

Switchgear Harmonic Vibration

(OP)
A large free standing 400 amp Cutler Hammer/Westinghouse disconnect switch violently vibrates when the SCR controlled lighting it feeds for a movie set is turned on.

The noise is so loud they have had to stop filming.


Are there any quick low cost solutions to this problem?


Thanks for any help.

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