There is a current sound from the high-voltage busbar
Busbars carry significant amounts of current with harmonics at relatively high frequencies. However that can create electromagnetic noise and interfere with the performance of nearby devices. Traditional bus bar current measurement techniques use closed loop current modules to accurately measure and control current. The audible noise emitted from high voltage lines or busbar line is caused by the discharge. The busbar current (Ib) is the total current flowing through a busbar, which can be calculated using the following formula: Ib = Σ (Ii) where Ib is the busbar current, Ii is the individual current flowing through each branch circuit connected to the busbar.
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