Rectangular Wire Enamel

Hi
1- In enameling processes, what is the best base coat enamel for large copper flat wires size (especially 12*2.8 mm)?

For this size, we presently use the enamel: PVF+ Epoxy and we face to BDV (During production we have no BDV. but after a few days later it shows.)

2- What enamel is good for CTC cables?

Thanks

The enamel you would use would be determined by your customers needs and the materiasl your enamel supplier can provide.

this is what one company says:
Insulation of the Individual Conductor
The enameled wire can be selected in accordance with the thermal requirements of the transformers: •
Polyvinylacetal enameled rectangular copper wire, class 120 at IEC317-18.1990. GB/T7095.2-1995

•
Hard polyvinylacetal enameled rectangular copper wire, class 120 according to ETS3001 supplied by Essex

•
Bonded polyvinylacetal enameled rectangular copper wire, class 120 according to ETS3003 supplied by Essex.

•
Hard and bonded polyvinylacetal enameled rectangular copper wire, class 120 according to ETS3001 and ETS3003 supplied by Essex

•
Polyesterimide enameled rectangular copper wire, class 180 at IEC317-28（1990） GB/T7095.4-1995