A single core cable has insulation resistance of 100 MΩ/km. The insulation resistance for 5 km length is
Consider the following statements:
1. The insulation resistance of the cable will increase if the length of cable is increased.
2. For the same overall diameter of cable, the grading of cable will increase the safe working voltage.
3. The normal operating temperature of PVC cable is 70°C.
4. The thermal resistance of soil increases as the moisture content of soil increases.
Which of the following statement is/are correct?
The material for armouring on cable is usually
Consider the following properties regarding insulation for cables: 1) A low specific resistance 2) High temperature withstand 3) High dielectric strength Which of the above properties of insulation are correct while using cables?
If the loss angle of a cable is δ then the power factor is given by:
What is the advantage of cable transmission?
The electrostatic stress in a cable is
The dielectric loss in the insulation of a lossy underground cable, due to leakage current is (using standard notations)
A concentric cable has a conductor diameter of 1 cm and an insulation thickness of 1.5 cm. When the cable is subjected to a test pressure of 33 kV, the maximum field strength will be nearly