Question

A 132 KV, 50 HZ, 3 phase, 3 core metal sheathed cable gave the following resutls in testing for capacitance:
(a) capacitance between shorted conductors and sheath is 0.8 micro farad.
(b) capacitance between two conductors shorted with sheath and the third conductor is 0.6 micro farad.

Draw the test arrangment in each case and determine:
(i) the capacitance between any two conductors.
(ii) the conductor self capacitance and the capacitance between any two shorted conductors and the third conductor.
(iii) the charging current and charging power for a power factor of 0.25 .
(iv) the power loss and loss angle.

Answer 1