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ASTM Selected Technical Papers
Symposium on Temperature Stability of Electrical Insulating Materials
By
K. N. Mathes
K. N. Mathes
1
General Electric Co.
,
Schenectady, N. Y., Chairman of Symposium Committee
.
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ISBN-10:
0-8031-6531-5
ISBN:
978-0-8031-6531-1
No. of Pages:
142
Publisher:
ASTM International
Publication date:
1954

For many years, insulating materials have been divided into several temperature classes based to a large extent on a broad definition of their composition, that is, organic, inorganic, combinations of organic and inorganic, etc. Service experience over many years has served generally to confirm the classifications and to establish the suggested temperature limits for each class. However, during the years the classes and the temperatures associated with them have in some cases become too restrictive in view of the rapid development of new insulating materials. It has therefore become increasingly apparent that insulating technology can no longer wait for the confirmation of heat stability by service experience alone. Test methods must be developed and accepted which also can serve as guides in this respect. This first ASTM Symposium on Temperature Stability of Electrical Insulating Materials is an important part of such effort. The papers, of course, represent only the opinion and experiences of the individual authors except where otherwise stated. Work is in progress to develop generally accepted standards for determining the thermal stability of insulating materials.

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