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High 3rd harmonic on the neutral

MS01
Afternoon,

I was wondering if anyone has nay experiences of having issues with high 3rd harmonic currents on the neutral on high-rised residential schemes? I appreciate  non-linear single phase loads will impact the 3rd harmonic and even on a balanced system harmonics are an issue but we are measuring it at 300% but I can’t think why this may be the case on a residential building.

Does anyone have any ideas?



M
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  • 0
    Is it correct that the effect of the harmonic is to shift part of the neutral current out of sync so it’s returning with the neutral current of another phase adding to the overall neutral current from where they are combined in a three phase distribution board busbar?


    Andy Betteridge
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  • 0
    Is it correct that the effect of the harmonic is to shift part of the neutral current out of sync so it’s returning with the neutral current of another phase adding to the overall neutral current from where they are combined in a three phase distribution board busbar?


    Andy Betteridge
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