What problems do triplens pose for neutral bus ducts?
What will be an ideal response?
Triplen harmonic currents can also cause problems with neutral bus ducts and connecting lugs. A neutral bus is sized to carry the rated phase current. Since triplen harmonics can cause the neutral current to be higher than the phase current, it is possible for the neutral bus to become overloaded. Electrical panelboards and bus ducts are designed to carry currents that operate at 60 hertz. Harmonic currents produce magnetic fields that operate at higher frequencies. If these fields should become mechanically resonant with the panelboard or bus duct enclosures, the panelboards and bus ducts can vibrate and produce buzzing sounds at the harmonic frequency.
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What will be an ideal response?
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