Lyght Transfer Switch humming

[tonycamacho]

I have a Lyght LPT 50CA transfer switch that does the automatic
switching between Shorepower and the generator. When hooked up to CG electrical it makes a constant hum or buzz noise which at times can be very noticable. When I run the generator the noise is extremely loud. I have already checked mounting for vibrations and connections. The switch has only about 10 hours of genertor running on it, it looks new. The noise dissappears if I put pressure on the center of the relay plunger. I suspect that I will have to replace this transfer switch. Has anyone ever experienced this problem and what was the fix?

Thanks

Tony

[noneck]

So the coil is humming, I know of no fix for that...it looks like a nice transfer switch. When I installed one in mine it was only a 120vac/30a unit (smaller) but my intention was to energize just my entertainment center outlet.

[tonycamacho]

At times a very irritating hum which turns to a squeaking buzz when the generator is on.
Any inputs on a quieter transfer switch. We use similar systems aboard the yachts I skipper and never seem to have this noise. Thanks for the feedback.

Tony

[Tom S.]

Can you name the tune?



(Sorry - I couldn't resist!)

[noneck]

Sorry, Tony...I know very little about these in regards to noise generated by coil in the active state. Mine has not made any noticeable noise but is a different brand and only 30amp...but they do make a 50amp...
http://www.iotaengineering.com/its30r.htm