Question
Download Solution PDFThe power of a n-phase unbalanced circuit can be measured by using a minimum of _________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFAccording to Blondel’s theorem:
- When a system contains ‘N’ number of phases & ‘N+1’ wires, then ‘N’ number of watt-meters is required to calculate the total power of the system.
- When a system contains ‘N’ number of phases & ‘N’ wires, then ‘N-1’ number of watt-meters is required to calculate the total power of the system.
- In a 3-phase balanced and unbalanced star-connected system, two watt-meters are sufficient to measure the total power.
- But if a 3-phase star connected system is balanced then only one wattmeter is sufficient to measure the total power.
Last updated on Jul 1, 2025
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