Hello, Thankyou in advance for helping me.
I often find interest in the valued discussions here.
I would like some advice

What is the total harmonic distortion acceptable on a 4-wire three phase installation

My measurements are
Phase 1 - 3.8%
Phase 2 - 4.1%
Phase 3 - 5.5%

Neutral - 96.8% [not a typo]

If this is not correct - how do I fix it

Currently measuring a relatively balanced load around 85 to 100 amps per phase

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