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The relation between IL and IPh is in a delta connected system is?

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The relation between IL and IPh is in a delta connected system is?

(a) IL = IPh

(b) IL = √3 IPh

(c) IL = 3 IPh

(d) IL = 3√3IPh

I got this question in examination.

The origin of the question is Voltage, Current and Power in a Delta Connected System topic in chapter Polyphase Circuits of Network Theory

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Right answer is (b) IL = √3 IPh

The explanation is: The relation between IL and IPh is in a delta connected system is IL = √3 IPh. The arrows placed alongside the voltages of the three phases indicate that the terminals are positive during their positive half cycles.

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