Q3: A) A single-core lead sheathed cable is graded by using three dielectrics of relative permittivity 5, 4 and 3 respectively. The conductor diameter is 2 cm and overall diameter is 8 cm. If the three dielectrics are worked at the same maximum stress of 40 kV/cm, find the safe working voltage of the cable. What will be the value of safe working voltage for an ungraded cable, assuming the same conductor and overall diameter and the maximum dielectric stress? B) State the main disadvantages of Low Power Factor in distribution system.

Q3: A) A single-core lead sheathed cable is graded by using three dielectrics of relative permittivity 5, 4 and 3 respectively. The conductor diameter is 2 cm and overall diameter is 8 cm. If the three dielectrics are worked at the same maximum stress of 40 kV/cm, find the safe working voltage of the cable. What will be the value of safe working voltage for an ungraded cable, assuming the same conductor and overall diameter and the maximum dielectric stress? B) State the main disadvantages of Low Power Factor in distribution system.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.17P: Determine the GMR of each of the unconventional stranded conductors shown in Figure 4.30. All...

See similar textbooks

Similar questions

33 kv single core cable has a radius of conductor of 0.6 cm. The insulation martial has two layers. The thickness of the first and second layers are 0.8 cm and 0.4 cm respectively. The relative permittivity of the first and second layers are 4 and 3 respectively. Find 3- The minimum electric stress of the second layer. 4- The minimum electric stress of the first layer.
If the cross sectional area of a conductor is doubled, then the resistance of the conductor remains the same. becomes half of the initial value. becomes double the initial value. becomes four times the initial value.
Single core cable design for 25 kV. The radius of conductor is 0.5 cm. The insulation material consists of two layers. The thickness of each layer is 2 cm. The voltage of first and second layers are 20 kV, 5 kV respectively. The maximum Electric stress of the cable is
A 33 kV single core cable has a conductor diameter of 1 cm and a sheath of inside diameter 4 cm. Find the maximum and minimum stress in the insulation.
INSULATORS A string of suspension consists of four (4) units. The Voltage between each pin and earth is 0.14 of the Self-Capacitance of the unit. The Voltage between the Line Conductor and earth is 135 KV. Find the Voltage distribution across each unit. Draw the diagram.
Single core cable design for 25 kV. The radius of conductor is 0.5 cm. The insulation material consists of two layers. The thickness of each layer is 2 cm. The voltage of first and second layers are 20 kV, 5 kV respectively. The minimum Electric stress of the cable is
33 kv single core cable has a radius of conductor of 0.6 cm. The insulation martial has two layers. The thickness of the first and second layers are 0.8 cm and 0.4 cm respectively. The relative permittivity of the first and second layers are 4 and 3 respectively. Find 1- The minimum electric stress of the cable. 2- The maximum electric stress of the second layer. 3- The minimum electric stress of the second layer. 4- The minimum electric stress of the first layer. 1 Add file
Consider a three-core, three-phase, 50 Hz, 11 kV cable whose conductors are denoted as R, Y and B in the figure. The inter-phase capacitance (C₁) between each pair of conductors is 0.2 µF and the capacitance between each line conductor and the sheath is 0.4 µF. The per-phase charging current is C₂ HE C₁ ,C₁ Outer Sheath
Answer the following quastion * 150 kv single core cable has a radius of cable of 5cm. The insulation martial has two layers. The relative permittivity of the first and second layers are 6 and 3 respectively. If the minimum electric stress of the first and second layers are 30 kv/cm and 20 kv/cm respectively. Find the maximum electric stress of the first layer
A string of suspension consists of four (4) units. The Voltage between each pin and earth is 0.05 of the Self-Capacitance of the unit. The Voltage between the Line Conductor and earth is 90 KV. Find the Voltage distribution across each unit. Draw the diagram.
Each conductor of a 3-0 overhead line is suspended from a cross arm of a steel tower by a string of 4 suspension insulators. The voltage across the third 33 kV. The shunt capacitance between each insulator and the earth is 1/8th of the capacitance of the insulator itself. Find the voltage across string and string efficiency. D-128 Lod Fa
PROBLEM SOLVING NO. 2: A string of suspension consists of four (4) units. The Voltage between each pin and earth is 0.08 of the Self-Capacitance of the unit. The Voltage between the Line Conductor and earth is 110 KV. Find the Voltage distribution across each unit. Draw the diagram.