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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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。

youdao