<p>已知对称负载三角形联结，线电流<img max-width="300" src="https://file.gaojiufeng.cn/learnAppQuestion/a8/2a/a82abfd1a3ecde0e8ba7d567bcd74b65.jpg" style="width: 100%;height: auto;"> ，试求: <img max-width="300" src="https://file.gaojiufeng.cn/learnAppQuestion/e6/8d/e68de696605ccc8800938330b3f968a2.jpg" style="width: 100%;height: auto;"></p>