漏电火灾报警系统中的“漏电”解释实际上已与我们传统理解的大不一样，在相关规范中准确地说应该称之为“剩余电流”，剩余电流比漏电电流含义更广，它包含了电器式线路缘损伤流入大地的故障接地电流、对地电容电流、谐波分量电流及电器设备和线路正常运行时对地的泄露电流，因带电导体间相与相间及相与N线间的短路应靠保护电器切断电源，当故障电流值小于过电流保护装置的动作电流值的电弧短路确难以切断电源，电气火灾的有关报道中接地故障电弧引起的火灾多于带电导体间（相与相、相与N线）的短路，因此，对于接地故障无论是金属性的还是电弧性的短路都能利用剩余电流保护装置切断电源发出报警信号以利预知灾前隐患，及时采取措施消除隐患，避免火灾的发生。“漏电火灾报警系统”作为一种新生的先进保护措施已经得到了消防部门、施工图审查中心和消防工程设计工人员的重视，作为一种预报警系统，其优于火灾自动报警系统及消防联动系统的地方是可以提前报警并采取应急手段，将用户损失尽量减少到最低限度，因此在工程设计中应严格按照规范要求设置“漏电火灾报警系统”。
In fact, the interpretation of "leakage" in leakage fire alarm system is quite different from our traditional understanding. It should be accurately called "residual current" in relevant specifications. The meaning of residual current is broader than that of leakage current. It includes fault grounding current, capacitance current to ground, harmonic component current and normal electrical equipment and lines. The leakage current to the ground during operation should be cut off by the protective apparatus because of the short circuit between the phase and phase of the live conductor and between the phase and the N-wire. When the fault current value is less than the action current value of the over-current protection device, it is really difficult to cut off the power supply. In the related reports of electric fire, the fire caused by the ground fault arc is more than that caused by the short circuit www.diandongmenz.cnwww.fenshaoluu.cnwww.fusheguan.com.cnwww.zhujianchang.cnbetween the live conductor (phase and phase, phase and N-wire). Therefore, the residual current protection device www.zhutongjian.cnwww.zhutiejian.net.cncan be used to cut off the power supply and send out alarm signals for grounding fault, whether metal or arc short circuit, in order to predict the hidden danger before the disaster, and take timely measures to eliminate the hidden danger, so as to avoid the occurrence of fire. As a new advanced protection measure, "Leakage Fire Alarm System" has been paid attention to by fire department, construction drawing examination center and fire engineering design workers. As a forecasting and alarming system, it is better than automatic fire alarm system and fire fighting linkage system in that it can alarm in advance and take emergency measures to minimize user losses. In engineering design, the "leakage fire alarm system" should be set up strictly in accordance with the specifications.