what is the technical/application difference between Polyester Dogbone and Epoxy Dogbone

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#1 21679664 04 May 2018 13:43

sanjay jandial sanjay jandial

Anonymous

Post #1
21679664 04 May 2018 13:43

what is the technical/application difference between Polyester Dogbone and Epoxy Dogbone ?
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#2 21679665 05 May 2018 12:28

David Ashton David Ashton

Anonymous

Post #2
21679665 05 May 2018 12:28

Sanjay when I first saw this I thought it was a joke, but a bit of googling revealed that a dogbone is an insulating member used to separate wires in a (high power) transformer. Is this what you're referring to? If so I have learned something, but it is so far outside my usual areas of (supposed) expertise that I cannot give you any sort of answer as to which is better. Maybe some of our power experts can do so?
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#3 21679666 05 May 2018 12:40

sanjay jandial sanjay jandial

Anonymous

Post #3
21679666 05 May 2018 12:40

Yes. Dogbones are used between 2 layers of windings in power transformers for separation and insulation. However i do not know the technical & application difference between Polyester Dogbone and Epoxy Dogbone. Yesterday somebody told me that Polyester Dogbone is suitable upto 100 degree Temp Rise only Class B. While Epoxy Dogbone is is suitable upto 100 degree Temp Rise only Class F. But i have not seen any technical writeup supporting the same
#4 21679667 07 May 2018 12:09

Kevin Angelo Ma Kevin Angelo Ma

Anonymous

Post #4
21679667 07 May 2018 12:09

Epoxy as well as Polyester is used for a variety of purposes ranging from electrical insulation in transformers, switchgears etc. to general applications where non-corrosive and electrical insulation material is needed.
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