Alternator insulation Class
Alternator insulation Class
(OP)
An alternator specification calls for Class F insulation with Temp rise to Class B. The ambient Temp max is indicated as 54 Deg C.
Is it not enough if we specify the Insulation Class alone.What is the significance of specifying this detail "Temperature Rise"?
Thanks to clarify.
Is it not enough if we specify the Insulation Class alone.What is the significance of specifying this detail "Temperature Rise"?
Thanks to clarify.






RE: Alternator insulation Class
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Alternator insulation Class
A class B rise means a maximum winding temperature of 120 deg C, which is 80 deg C rise over an ambient of 40 deg C.
If the ambient is over 40 deg C, better to specify a class H (180 deg C) winding,
RE: Alternator insulation Class
www.generac.com/PublicPDFs/0166970SBY.pdf
Hope that helps
RE: Alternator insulation Class
RE: Alternator insulation Class
Came across it a couple of years ago prepping to do a class on generators for some of our sales people where I used to work. Only negative comment I got on the paper and it's info is who it came from.
Marathon and KATO both have some pretty good explanations as well, but this is about the nicest summary explanation I've found on the topic.
RE: Alternator insulation Class
RE: Alternator insulation Class
Of course, it is a MV set (Over 600 V), then you would get only class F machine.