试论我国煤矿井下低压供电保护系统的技术改造

Technical up-grading of the current lowvoltage power supply protection system in China's coal mines

在井下供电系统中,低压供电线路及各种低压电器设备又占据了整个井下供电线路与电器设备中的大部分,而且它们又深入到采区与掘进工作面,工况特别恶劣,易发生各种电气事故,因此提高井下低压供电的质量,完善低压供电的保护系统是保证整个井下供电的可靠性,防止电气安全事故发生的关键。 1.

Detailed analysis is made on the current situation of the low voltage power supply protection system in China's coal mines. On the basis of general requirements for the low-voltage power supply protection system and experiences of advanced coal producing countries, the author holds that electronic protective system for low-voltage power supply must be adopted in China's underground coal mines. Actually, tremendous achievements in this field have already been obtained since 1949.