loud noisy humm in transfer switch
My transfer switch has had a loud humm to it since new--in fact was replaced under warranty once to no avail. Unfortunately it sits near our bed, so it's bothersome at night. my RV tech says I cou...
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dougrainer wrote:Mandalay Parr wrote:
Think I would go with a different brand. BTW, the transfer switch relay should only be energized when on generator.
Maybe it's wired wrong. Mine is quiet.
Some transfer switches engage when on either source. BUT, the hum can be caused by dirty 120 input current that is not steady at 60 Hz cycles. The tell on the OP is he had it replaced and had the same hum. That points to an external cause. Doug
As Doug stated, some transfer switches are energized on either source. However, 120 is the voltage not current and although you may see some frequency drift with your onboard the generator, you will NEVER see it on the grid.
What you are hearing is the 60 cycle hum cause by the magnetic field making the enclosure and/or coils vibrate. If the vibration is within the core of the coil you may not be able to do much except to ensure it is mounted securely. If it is the enclosure, try tightening all mounting screws including the cover or installing a shock mount (ie: rubber) between the enclosure and the mounting surface.
Lou
05 Travel Supreme Envoy
