Question
Download Solution PDF(I) Unsymmetrical spacing configurations cause the line interference.
(II) Unsymmetrical spacing causes the voltage induction in the communication lines.
The above problems can be eliminated by ________
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFEffect of Unsymmetrical Spacing of 3ϕ Line Conductors:
- Due to unsymmetrical spacing, flux linkage with all three phases is different. Because of this, there will be an unequal voltage drop in all three phases. Thus the voltage at the receiving end will not be the same for the three phases.
- Due to unsymmetrical spacing, the magnetic field external to the conductor is not zero. Thereby causing the induced voltage in adjacent electric circuits, thus producing the interference in communication lines.
- Unsymmetrical spacing configurations cause line interference.
The above-mentioned problems can be eliminated by the transposition of the 3ϕ line.
Transposition is the periodic swapping of positions of the conductors of a transmission line, in order to reduce interference and voltage induction in the 3ϕ transmission line.
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