>> Classification of winding insulation <

I have read through two international standards relative to the captioned subject. There are some differences even though they both are called the same classes. EN 60 355-1 IEC 85 Class Temp rise Actual temp A 75 degC

Re: Classification of winding insulation

I might be able to shed some light on some of it. The temperature rise is probably specified as being measured by the change in resistance method. The change of resistance method will average the internal temperatures and allows for a 5C hot spot. Hence, A 75 C rise, taken by the change of res

Classification of winding insulation

I have read through two international standards relative to the captioned subject. There are some differences even though they both are called the same classes. EN 60 355-1 IEC 85 Class Temp rise Actual temp A 75 degC