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Buzzing change over

lyledunn

A fairly loud buzzing noise has recently appeared in a 200A changeover switch. Everything checked for tightness. Assumption is that it is one of the coils but I am unsure if this is an issue of concern. 

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    It sems to have at least one contactor, it may be worn pole faces, in industry when too noisy, we used to dismantle and file the mating surfaces as flat as possible till replaced; if left, there will be an increase in heat at the coil with eventual burnout.

    Jaymack  

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  • 0

    It sems to have at least one contactor, it may be worn pole faces, in industry when too noisy, we used to dismantle and file the mating surfaces as flat as possible till replaced; if left, there will be an increase in heat at the coil with eventual burnout.

    Jaymack  

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