the system is 3 phase 4 wire. one leg is 208 V against the
neutral. The high leg powers 3 5 HP air compressors and four
one horse power balancer. In the summer the AC is connected also. I am drawing about 5 to 7 KW on each 120/240 volt
leg. Why should I get 15-12 and 7 % harmonics 0n the
Any help is appreciated.
PS: air compressors, balancer and A/C are three phase.
The ground is OK