近几年,有不少煤矿把载频检测原理应用到作127伏煤电钻供电系统的短路保护上。它采用一个几十千周的振荡信号,把它长期载入三相电网,对127伏三相电钻电缆相间的绝缘状况进行连续监视,一旦相间绝缘损坏,它就立即发出信号,由执行环节动作,切断电源,达到短路保护的目的。我厂最近投入批量生产的BZ80—2.5Z In recent years, many coal mines have applied the principle of carrier frequency detection to the short-circuit protection of power supply systems for 127 volt coal drills. It uses a few tens of thousands of weeks of oscillation signal, long-term load it to the three-phase power network, 127-volt three-phase drill cable insulation status of continuous monitoring, once the phase insulation damage, it immediately issued a signal from the implementation of the action , Cut off the power, to achieve the purpose of short-circuit protection. I plant recently put into mass production BZ80-2.5Z