Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > (I) Unsymmetrical spacing configurations caus...
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(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 ________
(II) Unsymmetrical spacing causes the voltage induction in the communication lines.
The above problems can be eliminated by ________
- a)transposition
- b)three phase
- c)parallel lines
- d)All of the above
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
(I) Unsymmetrical spacing configurations cause the line interference.(...
Effect 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.
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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(I) Unsymmetrical spacing configurations cause the line interference.(...
Understanding Line Interference and Voltage Induction
Line interference and voltage induction are significant issues in power and communication lines, primarily arising from unsymmetrical spacing configurations.
1. Unsymmetrical Spacing Configurations
- Interference: When conductors are not symmetrically spaced, it leads to uneven electromagnetic fields, causing line interference. This can disrupt signal quality in communication lines.
- Voltage Induction: Unsymmetrical configurations can also induce unwanted voltages due to varying magnetic fields, leading to interference and reduced performance in electrical systems.
2. The Solution: Transposition
- What is Transposition?: Transposition involves periodically swapping the positions of conductors in a multi-conductor system. This technique ensures that each conductor experiences a balanced electromagnetic environment over time.
- Benefits:
- Equalizes Induction: By changing the relative positions of the conductors, transposition minimizes the effects of unsymmetrical spacing, thus reducing voltage induction.
- Mitigates Interference: It helps in balancing the line and reducing interference, leading to improved communication clarity and efficiency in power delivery.
3. Other Options Explained
- Three Phase: While three-phase systems are efficient for power distribution, they do not directly address the issues of unsymmetrical spacing.
- Parallel Lines: Maintaining parallel lines can help in certain contexts but does not inherently resolve the problem of voltage induction or interference caused by spacing.
Conclusion
To effectively eliminate the problems associated with unsymmetrical spacing configurations, transposition stands out as the most effective solution, ensuring balanced electromagnetic behavior in communication and power lines.
Line interference and voltage induction are significant issues in power and communication lines, primarily arising from unsymmetrical spacing configurations.
1. Unsymmetrical Spacing Configurations
- Interference: When conductors are not symmetrically spaced, it leads to uneven electromagnetic fields, causing line interference. This can disrupt signal quality in communication lines.
- Voltage Induction: Unsymmetrical configurations can also induce unwanted voltages due to varying magnetic fields, leading to interference and reduced performance in electrical systems.
2. The Solution: Transposition
- What is Transposition?: Transposition involves periodically swapping the positions of conductors in a multi-conductor system. This technique ensures that each conductor experiences a balanced electromagnetic environment over time.
- Benefits:
- Equalizes Induction: By changing the relative positions of the conductors, transposition minimizes the effects of unsymmetrical spacing, thus reducing voltage induction.
- Mitigates Interference: It helps in balancing the line and reducing interference, leading to improved communication clarity and efficiency in power delivery.
3. Other Options Explained
- Three Phase: While three-phase systems are efficient for power distribution, they do not directly address the issues of unsymmetrical spacing.
- Parallel Lines: Maintaining parallel lines can help in certain contexts but does not inherently resolve the problem of voltage induction or interference caused by spacing.
Conclusion
To effectively eliminate the problems associated with unsymmetrical spacing configurations, transposition stands out as the most effective solution, ensuring balanced electromagnetic behavior in communication and power lines.
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