The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the line current I1.

The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the line current I1.

(a) (-51.96-j10) A

(b) (-51.96+j10) A

(c) (51.96+j10) A

(d) (51.96+j10) A

The question was asked by my college professor while I was bunking the class.

This intriguing question comes from Three-Phase Unbalanced Circuits topic in section Polyphase Circuits of Network Theory

1 Answer

The three impedances Z1 = 20∠30⁰Ω, Z2 = 40∠60⁰Ω, Z3 = 10∠-90⁰Ω are delta-connected to a 400V, 3 – Ø system. Find the line current I1.

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