Why does a fluorescent light ballast call?
Now new fluorescent lamp USES electronic ballast, generally will not sing, the old ballast fluorescent lamp or in electronic ballast for fluorescent lamp more energy saving and save electricity.
Repair method is to remove the ballast, dust removal after soaking in the heat insulating paint, varnish after soaking out to dry. But the said simple, ordinary people is not this condition. Usually it is sound too big change a directly.
But with longer duration of use, silicon steel sheet will be loose slowly (appearance often watch out), if the current job at this moment, through the outside in the coil is 50 hz alternating current, magnetic field changes can cause vibration their silicon steel sheet.
If is old-fashioned fluorescent ballasts, its core is made of pieces of silicon steel sheet pile together, after drying. Soak insulating paint baking varnish firmly stick to the silicon steel sheet, at work, there is no sound.
