[RE-wrenches] X-240 Buzz

[Foxfire Energy]

Not positive, but I’d suspect resonant frequencies.. might be simple as using flat washers under the mounting screws.. maybe try adding an inductive load to skew the power factor.. gobs of information online.. good luck. db

Sent from my iPhone

> On Jan 31, 2022, at 10:34 AM, drake.chamberlin at redwoodalliance.org wrote:
> 
> 
> An Outback X-240 auto transformer on a VFX3648 buzzes loudly with a load of 400 W. The sound diminishes and finally stops with higher loads.
> 
> The load was an electric, oil filled space heater.
> 
> Has anyone seen this before?
> 
> Thank you,
> 
> Drake
> 
> Drake Chamberlin
> Athens Electric LLC
> Ohio Electrical Contractor’s License 44810
> CO Master Electrician’s License 4526
> NABCEP Certified PV Installation Professional
> 
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