Electrical Engineering XYZ MCQs
Which of following is a disadvantage of phase modifiers:
- It requires more maintenance
- It consumes both active and reactive power
- Initial cost of synchronous phase modifier is high
- All of these
Correct answer: 4. All of these
Explanation: Phase modifiers, particularly synchronous phase modifiers, are devices used in power systems to control the phase angle between voltage and current. While they offer certain advantages, they also come with disadvantages. Let’s break down each option:
- It requires more maintenance:
- This is a potential disadvantage. Maintenance is a factor to consider in the operation of any electrical device, and phase modifiers are no exception. Regular maintenance may be required to ensure their proper functioning.
- It consumes both active and reactive power:
- This is another potential disadvantage. Ideally, power system components should not consume more power than necessary. If a phase modifier consumes both active (real) and reactive power, it can affect the overall efficiency of the power system.
- Initial cost of synchronous phase modifier is high:
- This is a known disadvantage. The initial cost of synchronous phase modifiers can be relatively high. The investment required for installing these devices may be a significant factor in decision-making, especially when compared to other alternatives.