a) A surge of 15 V magnitude travels along a cable towards its juncti…

Question

a) A surge of 15 V magnitude travels along a cable towards its junction with an overhead line. The inductance and capacitance of a cable and overhead line are respectively $0.3\text{ mH}$, $0.4\text{ }\mu\text{F}$ and $1.5\text{ mH}$, $0.012\text{ }\mu\text{F}$ per km. Find the voltage rise at the junction due to the surge.

b) Explain the variation of current and voltage on an overhead line when one end of the line is

i) Short circuited, and

ii) Open-circuited and at the other end a source of constant e.m.f. V is switched in.

Related pages

• Line-to-Line Fault — topic
• Power System-II syllabus