当故障导致供电系统与外电网断开后，此时供电系统因有功不平衡，将出现频率崩溃现象，导致大面积停电事故。
When disconnected with external power grid due to certain fault, it will result in frequency collapse, and even leads to large-scale blackout owing to the active power imbalance.
本文着重对工业供电系统电气设备的接地、接零及漏电保护的原理与安装方法等作了详尽的介绍，旨在确保用电安全，防止触电事故的发生。
This article goes into details on the principle and assemblage of earthing, zeroing and leakage prevention with the view of ensuring power supply safety and hindering electric shock accidents.
大量调研资料证明，越级跳闸事故（以下简称越跳）是我国煤矿高压供电系统目前普遍存在的严重问题。
Based on investigation of large amount of data, it is found that currently inadequate tripping failure of high tension power supply is a serious problem that exists universally in Chinese coal mine.
通过对唐山矿业分公司井下高压供电系统状况及事故的分析，找出影响高压供电的主要原因，提出预防井下高压供电事故的措施。
The failure of high voltage power supply equipment, especially the earthing failure of high voltage power transmission line, will bring great impact on the construction site.
通过对唐山矿业分公司井下高压供电系统状况及事故的分析，找出影响高压供电的主要原因，提出预防井下高压供电事故的措施。
The failure of high voltage power supply equipment, especially the earthing failure of high voltage power transmission line, will bring great impact on the construction site.
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