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In a delta-connected system, the currents IR = IB = IY =?(a) IPh(b) 2IPh(c) 3IPh(d) 4IPhI got this question by my college professor while I was bunking the class.This question is from Voltage, Current and Power in a Delta Connected System in chapter Polyphase Circuits of Network Theory

Answer»

The correct option is (a) IPh

To elaborate: In a delta-connected system, the currents IR = IB = IY = IPh. Since the system is balanced, the SUM of the THREE VOLTAGES ROUND the closed mesh is zero; consequently no current can flow around the mesh when the terminals are open.



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