. A single core concentric cable 6 km long has a capacitance of 0.22 ut per...
A 33 kV power cable 7 km long has a capacitance of 0.32 uF/km and a conductance associated with its insulation of 5 LS /km. If the cable is operating at rated voltage at a frequency of 50 Hz, calculate: (a) The value of tand associated with the cable (b) The power dissipated in the cable insulation
The capacitance per unit length of a very long coaxial cable, made of two concentric cylinders, is 50 pF/m. What is the radius of the outer cylinder if the radius of the inner one is 1.0 mm? (k = 1/4??0 = 8.99 � 109 N ? m2/C2) Answer 0.50 mm 3.0 mm 4.0 mm 2.0 mm 1.0 mm
The use of superconductors has been proposed for power transmission lines. A single coaxial cable (see figure below) could carry a power of 1.00 x 103 MW (the output of a large power plant) at 200 kV, DC, over a distance of 1.00 x 103 km without loss. An ?nner wre o radius a 1.00 cm made rom the superconductor Nb3Sn, carries he currentl n ne direction. A surrounding superconducting C linder of radi uso 0 8cm ould a mite...