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.
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.
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。
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