Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Single or One Wattmeter method can only be us...
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Single or One Wattmeter method can only be used for
- a)Balanced three-phase load
- b)Unbalanced two-phase load
- c)Balanced one-phase load
- d)Unbalanced one-phase load
Correct answer is option 'A'. Can you explain this answer?
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Single or One Wattmeter method can only be used fora)Balanced three-ph...
Single or one wattmeter method is used for only balanced three phase loads. It is best method for the measurement of 3 phase reactive power compared to 2 wattmeter method since error can be minimized.
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Single or One Wattmeter method can only be used fora)Balanced three-ph...
Single or One Wattmeter Method for Power Measurement
The Single or One Wattmeter method is used to measure the power of a three-phase circuit. This method is based on the concept that the sum of the powers in the three phases of a balanced three-phase load is zero.
This method is applicable only to a balanced three-phase load. In a balanced three-phase load, all three phases have the same impedance and the same current. As a result, the voltage across each phase is the same, and the power in each phase is the same.
Advantages of Single or One Wattmeter Method
- It requires only one wattmeter, which makes it a cost-effective method of power measurement.
- It is easy to use and does not require complex calculations.
Disadvantages of Single or One Wattmeter Method
- It cannot be used for unbalanced three-phase loads.
- It cannot be used for single-phase loads.
Conclusion
The Single or One Wattmeter method is a simple and cost-effective method of measuring the power of a balanced three-phase load. However, it has limitations and cannot be used for unbalanced three-phase loads or single-phase loads.
The Single or One Wattmeter method is used to measure the power of a three-phase circuit. This method is based on the concept that the sum of the powers in the three phases of a balanced three-phase load is zero.
This method is applicable only to a balanced three-phase load. In a balanced three-phase load, all three phases have the same impedance and the same current. As a result, the voltage across each phase is the same, and the power in each phase is the same.
Advantages of Single or One Wattmeter Method
- It requires only one wattmeter, which makes it a cost-effective method of power measurement.
- It is easy to use and does not require complex calculations.
Disadvantages of Single or One Wattmeter Method
- It cannot be used for unbalanced three-phase loads.
- It cannot be used for single-phase loads.
Conclusion
The Single or One Wattmeter method is a simple and cost-effective method of measuring the power of a balanced three-phase load. However, it has limitations and cannot be used for unbalanced three-phase loads or single-phase loads.
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Single or One Wattmeter method can only be used fora)Balanced three-phase loadb)Unbalanced two-phase loadc)Balanced one-phase loadd)Unbalanced one-phase loadCorrect answer is option 'A'. Can you explain this answer?
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