Question
Download Solution PDFWhich of the following is true for the three-phase load shown in the figure?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept
- A three-phase load system is said to be a balanced load if the magnitudes of the phase currents are equal and the phase angles of the currents are 120° apart.
- Phase current is equal (IA = IB = IC), so no current flows through the neutral (IN = IA +IB + IC).
- If any one of the phase currents becomes zero, the three-phase load becomes an unbalanced load.
Explanation
In the given figure, the phase A is open circuited. So, IA = 0.
Thus the load is unbalanced and the current through the neutral is IN = IB + IC
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