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.
1 Answer
Here are the insulating materials typically used for each of the given applications:
- Reason: Mica and ceramic are good insulators with high thermal resistance, which makes them ideal for handling the high heat produced by the heating element. They also have high dielectric strength, which is essential to prevent electrical hazards.
- Reason: For coils, enamel is commonly used as an insulating material because it can withstand high temperatures and has excellent dielectric properties. PVC is also used in many low-voltage applications due to its durability and ease of application.
- Reason: Transformer bushings typically use porcelain or high-strength polymer materials. These materials offer excellent insulation properties and can withstand high voltage and environmental conditions, ensuring the safe passage of electrical conductors through the transformer tank.
- Reason: Porcelain insulators have been traditionally used, but now polymer composites are becoming more popular. Both materials can resist weathering, high voltage, and mechanical stress while keeping the transmission lines electrically isolated from the supporting pole.
Each of these materials is chosen based on their insulating properties, heat resistance, dielectric strength, and ability to withstand environmental conditions.
- Insulation between heating element and base plate of electric iron:
- Reason: Mica and ceramic are good insulators with high thermal resistance, which makes them ideal for handling the high heat produced by the heating element. They also have high dielectric strength, which is essential to prevent electrical hazards.
- Insulation used over copper or aluminium conductors used for making coils:
- Reason: For coils, enamel is commonly used as an insulating material because it can withstand high temperatures and has excellent dielectric properties. PVC is also used in many low-voltage applications due to its durability and ease of application.
- Transformer bushings:
- Reason: Transformer bushings typically use porcelain or high-strength polymer materials. These materials offer excellent insulation properties and can withstand high voltage and environmental conditions, ensuring the safe passage of electrical conductors through the transformer tank.
- Insulation between transmission line and pole:
- Reason: Porcelain insulators have been traditionally used, but now polymer composites are becoming more popular. Both materials can resist weathering, high voltage, and mechanical stress while keeping the transmission lines electrically isolated from the supporting pole.
Each of these materials is chosen based on their insulating properties, heat resistance, dielectric strength, and ability to withstand environmental conditions.