Autotransformers with all windings in Y-connection result in a Peculiar Zero-Sequence impedance.
全星形自耦变压器结构特殊。造成零序阻抗的特殊性。
Low and even forward (backward) and zero sequence impedance improves the quality of power supply.
电缆具有较低且均匀的正(逆)序和零序工作阻抗，有利于改善供电品质。
In the meanwhile it is pointed out that the quantity change of the parallel line and zero-sequence impedance must be retested.
同时还指出平行线路条数变化，零序阻抗均需重新测试。
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