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Types of insulating materials
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State failure phenomena observed in insulating material. State four reasons for failure of gaseous and solid dielectric materials.
Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
State the type of insulating materials under Class Y and Class B.
State properties of insulating materials.
Explain the mechanical properties of insulating materials.