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In a star connected system, the phasors VRN, VYN are ____ apart.

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In a star connected system, the phasors VRN, VYN are ____ apart.

(a) 15⁰

(b) 30⁰

(c) 45⁰

(d) 60⁰

The question was posed to me at a job interview.

This intriguing question originated from Voltage, Current and Power in a Star Connected System in division Polyphase Circuits of Network Theory

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Correct option is (d) 60⁰

The best explanation: In a star connected system, the phasors VRN, VYN are separated by θ = 60⁰. To subtract VYN from VRN, we reverse the phase VYN and find its phasor sum with VRN.

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