The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the power in the Y phase.(a) 1000(b) 2000(c) 3000(d) 4000The question was asked by my school principal while I was bunking the class.My enquiry is from Three-Phase Unbalanced Circuits topic in division Polyphase Circuits of Network Theory

The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10�

1.	The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the power in the Y phase.(a) 1000(b) 2000(c) 3000(d) 4000The question was asked by my school principal while I was bunking the class.My enquiry is from Three-Phase Unbalanced Circuits topic in division Polyphase Circuits of Network Theory
Answer» RIGHT option is (b) 2000 The explanation is: The term power is DEFINED as the product of square of CURRENT and the impedance. So the power in the Y phase = 10^2 x 20 = 2000W.

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