Discussion
A cable specimen measured on a Schering bridge gives a capacitance of 0.2 \( \mu \)F and a loss tangent of 0.005 at 50 Hz. Its dielectric loss on a 10 kV test is about
Answer: C
The loss is \( \omega C V^2 \tan\delta \), that is \( 314.2 \times 0.2 \times 10^{-6} \times 10^{8} \times 0.005 \), which comes to about 31 watts. Without the loss tangent the same product gives 6.3 kVAr, the reactive power the specimen draws, which is not dissipated at all.
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