New Magstarter buzzing sewage pump

[JackOfAllTrades13]

A month ago, I replaced a 30 year old relay with a magstarter to add motor protection to the 1hp sewage pump in our sewage vault. Grangier guided me on the selection of the starter which match the relay specs. The pump is activated by a piggy back double float switch tied into the magstarter. I installed this and watched it work flawlessly through the first emptying cycle. This only needs to empty every two weeks or more. Today, I was in my yard and heard a very loud buzzing coming from the vault. When I inspected, I turned the power off via an inline double throw switch, then back on. No more buzzing... Could moisture or something else cause this to occur? I see the frost has recently melted off of the interior walls that the starter box is attached too... Any suggetions would be appreciated.

 

[rodm1]

I don't have a clear answer for you, but the one at work dues the same thing it's been in service for 5 years I think its 575v.

I think its normal but irritating!

 

[RPH]

Was the starter pulled in? If so, then a build up of garbage between the lamination ends causes it not to set fully. You can clean it out but most likely to return. So long as it doesn't hang up between open or closed don't worry about it. In the long run when it sounds like a train locomotive time to replace it.