
المشاركة الأصلية كتبت بواسطة Shaltoot
When you run on diesel generators supply we expect excess flow of triplen harmonics in the neutral cable (triplen harmonics are 3rd, 9th, .. order etc) this is due to two three features of your case
1- Your load is harmonic generator lighting loads
2- Small Gensets produce harmonics depending on their design
3- Generator source impedance is usually in the range of 18% which is almost three times the impedance of similar size transformer
all the above contributed to your problem
after you have switched to utility supply (as I understood from your message) the problem disappeared because of the reasons I mentioned above.
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