geofhowe
New User
- Location
- San Diego, CA
Bad buzzing from the main facility transformer!!!
Long story short...
I am troubleshooting this. My maintenance supervisor brings a shop vac over, vacuums the transformer off and around the inside of the enclosure (power on).
Buzzing gone. Extra heat gone. Clean that old transformer!
I work in a 30+ year old facility. Our main transformer located inside the wall starting BUZZing loudly this morning and seemed to be producing extra heat. I know the difference between healthy hum (low bassy, solid sound) and a problem sounding buzz (sharp, mechanical). What was it?
I took a piece a plastic hose, held it to my ear and poked around. Definitely the middle coil area more at the top.
Hoping it is not plate delamination - this is annoying but not a show stopper. Must check load balance and then leakage, right?
Loads are pretty close. I started planning a no-load test for the weekend (a very big deal). With no output, I will check for balanced leakage current on each primary. Should be within 5-10%. What about the heat?
Decades of engineering experience...learned something NEW!
Long story short...
I am troubleshooting this. My maintenance supervisor brings a shop vac over, vacuums the transformer off and around the inside of the enclosure (power on).
Buzzing gone. Extra heat gone. Clean that old transformer!
I work in a 30+ year old facility. Our main transformer located inside the wall starting BUZZing loudly this morning and seemed to be producing extra heat. I know the difference between healthy hum (low bassy, solid sound) and a problem sounding buzz (sharp, mechanical). What was it?
I took a piece a plastic hose, held it to my ear and poked around. Definitely the middle coil area more at the top.
Hoping it is not plate delamination - this is annoying but not a show stopper. Must check load balance and then leakage, right?
Loads are pretty close. I started planning a no-load test for the weekend (a very big deal). With no output, I will check for balanced leakage current on each primary. Should be within 5-10%. What about the heat?
Decades of engineering experience...learned something NEW!
