The insulating material should have the following properties. The material must have high mechanical strength so that it carries the tension and weight of the conductors. They must have high dielectric strength. The material is highly resistive for preventing the flow of leakage current from the conductor to earth.
Which is the main property of insulating material?
What is the property of insulating materials? Explanation: Conductors, allow the flow of current through the material . Insulators are the opposite of conductors. The material doesn’t allow the flow of current through them.
Which of the following is the property of the insulator?
Insulators have very high resistivity . For example, insulators like glass have a resistivity value as high as 10 12 Ωm. The resistance of the insulator is considerably reduced in the presence of moisture and when there is an increase in temperature. Property 3: Insulators have large dielectric strength.
What is the main function of insulating material?
The most important function of the insulating material is to insulate voltage-carrying conductors against one another as well as against earth . But, in addition, they must fre- quently perform mechanical functions and must be in a position to withstand certain thermal and chemical stresses.
What are the different properties of a insulating material?
Thermal properties
The insulating materials used must be stable within the allowable temperatures. Some of the thermal properties checked for certain insulating materials are melting point, flash point, volatility, thermal conductivity, thermal expansion and heat resistance .
What are the applications of insulator?
- It prevents the passing of high-voltage in an electric circuit.
- It helps in reducing the cost of energy.
- It helps in saving the environment by controlling the emission of pollutants.
- It improves process performances.
- It protects from electric shock or electrocution.
What are examples of insulating materials?
- Fiberglass.
- Mineral wool.
- Cellulose.
- Natural fibers.
- Polystyrene.
- Polyisocyanurate.
- Polyurethane.
- Vermiculite and perlite.
What are the 3 characteristics of an insulator?
Properties of insulators
It has large resistance and specific resistance. Large di-electric strength. Resisting high temperature.
What are the types of insulators?
- Pin-type insulators. These insulators are used for the transmission and distribution of electric power at voltages up to 33 kV. ...
- Line post insulators. ...
- Suspension insulators. ...
- Strain insulators. ...
- Shackle insulators. ...
- Post insulators. ...
- Cap and pin insulators. ...
- Stay insulators.
What makes something an insulator?
Insulators are materials whose atoms have tightly bound electrons . These electrons are not free to roam around and be shared by neighboring atoms. Some common insulator materials are glass, plastic, rubber, air, and wood.
What is the importance of insulation?
Insulation will help you keep the desired temperature in your house all year round , protecting it against cold in winter and excess heat in summer. Insulation is also useful to reduce noise pollution. A well-insulated house is very energy efficient and will need very little additional heating and cooling.
Why do we need insulating materials?
We use insulators to keep our homes warm in winter and cool in summer . This helps to conserve energy and electricity.
What is insulation resistance?
An insulation resistance (IR) test measures the total resistance between any two points separated by electrical insulation . The test, therefore, determines how effective the dielectric (insulation) is in resisting the flow of electrical current.
How many classes of insulating materials are there?
7 insulating material classes are : Y, A, E, B, F, H and C. They are classified depending upon the maximum limit of temperature withstand capacity.
What are 4 examples of insulators?
Examples of insulators include plastics, Styrofoam, paper, rubber, glass and dry air .
What are 5 insulators?
- glass.
- rubber.
- oil.
- asphalt.
- fiberglass.
- porcelain.
- ceramic.
- quartz.
