earthed neutral system 接地中线系统 ; 中性点接地系统 earthed distribution system 接地配电系统 solidly earthed neutral system 中性点直接接地系统 ..
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此类继电器能够增加系统安全性，并对三相交流接地电阻或接地配电系统进行可靠的低级接地故障检测。
They provide system security and immediate reliable low level ground fault detection on three-phase AC resistance grounded or grounded electrical distribution systems.
现对低压配电系统接地和接零保护进行简要论述。
The paper discusses the low-voltage distribution system earthing and the neutral protection.
指出石化企业低压配电系统接地故障保护存在问题及其危害性，并做实例分析，提出了解决措施。
The problems existing in grounding protection of low voltage distribution system in petrochemical enterprise are pointed out together with their harmfulness.
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