VFD mitigate harmonics?

[petersonra]

Same term used for two totally different things. When talking about fall of potential testing on a breaker you are measuring the voltage drop under load from the line side to the load side of the breaker. The result is typically millivolts. The biggest indicator of a problem is where the readings of voltage drop are substantially different between phases of the same device.

Usually there is a simple fix. Just cycle the breaker on and off a few times. The wiping of the contacts is usually all it takes.

 

[ptonsparky]

Usually there is a simple fix. Just cycle the breaker on and off a few times. The wiping of the contacts is usually all it takes.

Sometimes helps until a replacement is obtained.

 

[petersonra]

Sometimes helps until a replacement is obtained.

Why would you replace it if the problem no longer exists?

 

[ptonsparky]

Why would you replace it if the problem no longer exists?

YMMV.
We were usually called after it was too late . Cycling helped but most of the time the VD was still comparatively out of whack. Time for new.

Talking about normally balanced load.