Question
Download Solution PDFWhich one of the following materials belongs to class B insulation
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFClassification of Insulation according to Temperature:
|
Class Y (90°C) |
Cotton, silk, paper, cellulose, wood, etc |
|
Class A (105°C) |
The material of class Y is impregnated with natural resin, cellulose ester, insulating oil, etc. Laminated wool, the varnished paper also examples of class A insulation. |
|
Class E (120°C) |
Synthetic resin enamels, cotton and paper laminated with formaldehyde bonding, etc. |
|
Class B (130°C) |
Mica, glass, fiber, asbestos with suitable bonding substance, build-up mica, glass, fiber, and asbestos lamination. |
|
Class F (155°C) |
The material of Class B with bonding material of higher thermal stability. |
|
Class H (180°C) |
Glass, fiber, asbestos, mica with silicon resin. |
|
Class C (above 180°C) |
Mica, ceramic, glass, quartz without binders or with silicon resin of higher thermal stability. |
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