![https://c-mk.s3.ap-northeast-2.amazonaws.com/2023/06/1선-지락전류-유도-1024x645.jpeg](https://c-mk.s3.ap-northeast-2.amazonaws.com/2023/06/1선-지락전류-유도-1024x645.jpeg)
1️⃣단상으로 등가변환
![https://c-mk.s3.ap-northeast-2.amazonaws.com/2022/11/c_1선지락등가회로.jpeg](https://c-mk.s3.ap-northeast-2.amazonaws.com/2022/11/c_1선지락등가회로.jpeg)
2️⃣대칭전류
\[I_0=\frac{1}{3}(I_a+I_b+I_c)=\frac{1}{3}I_a\] \[I_1=\frac{1}{3}(I_a+aI_b+a^2I_c)=\frac{1}{3}I_a\] \[I_2=\frac{1}{3}(I_a+a^2I_b+aI_c)=\frac{1}{3}I_a\] \[I_0=I_1=I_2=\frac{1}{3}I_a…(식1)\]
3️⃣Va=V₀+V₁+V₂ 에 발전기실고 (식1) 을 대입하면
\[V_a=V_0+V_1+V_2=-Z_0I_0+E_a-Z_1I_1-Z_2I_2=0\] \[(Z_0+Z_1+Z_2)I_0=E_a\] \[I_0=\frac{E_a}{Z_0+Z_1+Z_2}\]
4️⃣지락전류
\[I_g=I_a=3I_0=\frac{3E_a}{Z_0+Z_1+Z_2}\]
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