it has direction performance
The invention can judge if there has single-phase high-resistance grounding failure in the electric line, it has direction performance, and uses the mother line voltage as interference resisting accordance, it has a high protection sensitivity and reliability.
基于1个网页-相关网页
it has direction performance
它有方向性能
以上为机器翻译结果，长、整句建议使用 人工翻译 。