Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 11 replies
  • Subscribers 39 subscribers
  • Views 2142 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

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. 

Parents
  • 0

    That was the first thing out of the tool bag Andy! 
    The CO is relatively large but the current drawn through it is is largely due to LED lighting load which, incidentally, was installed as replacement for fluorescents and coincides with the buzzing. Total load is only around 30A per phase with intermittent increase to 50 odd when restaurant is going. Facility is a large indoor bowling arena. 
    A tear down would be a difficult operation as big pressure on the facility every day of the week. No signs of thermal problems.

Reply
  • 0

    That was the first thing out of the tool bag Andy! 
    The CO is relatively large but the current drawn through it is is largely due to LED lighting load which, incidentally, was installed as replacement for fluorescents and coincides with the buzzing. Total load is only around 30A per phase with intermittent increase to 50 odd when restaurant is going. Facility is a large indoor bowling arena. 
    A tear down would be a difficult operation as big pressure on the facility every day of the week. No signs of thermal problems.

Children
No Data

Community Rules & Guidelines