| 剩余电流式电气火灾监控探测器 |
| 添加时间：2017/5/22 10:44:13 浏览次数： |
| 一、剩余电流式电气火灾监控探测器的基本原理与使用要求 The basic principle and usage requirements of the electric fire monitoring detector for the residual current electric current 将配电线路的相线L（或三相LA、LB、LC）和零线N 同时穿过剩余电流互感器，在没有漏电的情况下它们的电流矢量和（即“剩余电流”residual current ）为0。当发生漏电时电流矢量和不为零，互感器将检测到的电流变换后（1000：1、2000：1、10000：1等不同变比）送至剩余电流式电气火灾监控探测器，探测器根据检测到的电流与设定的报警门限（监控设备设置或探测器自身设置）进行比较，当达到设定门限时，探测器发出报警信号。 Will L distribution circuit of phase line (or three-phase LA, LB, LC) and zero line N through the residual current transformer at the same time, in the absence of leakage of their current vector and (i.e., "residual current" residual current) is 0. When leakage happened, current vector, and is not zero, the transformer will be detected after the current transformation (1000:1, 2000:1, 10000:1) than that in different variable to the residual current electrical fire monitoring detector, detector according to the detected current and set the alarm threshold (set) monitoring equipment set or detector itself, when reached setting threshold, the alarm signal of the detector sounded. 特别强调的是：所谓“漏电”，是指相线或零线通过非预期负载（例如绝缘破损受潮）对大地连接产生电流。 In particular, the so-called "leakage" refers to the current of the connection between a phase line or a zero line through a non-anticipated load (for example, insulation damage). 在安装剩余电流互感器时，用户（负载）侧（穿过剩余电流互感器后）的线路必须是独立的，不能与保护区域以外的其他线路“共零”或有任何电气连接。 When installing a residual current transformer, the user (load) side (through the remaining after the current transformer) line must be independent, not protected area and other line "total zero" or any electrical connections. 线路的相线和零线必须同时穿过互感器，而保护地线（ PE ）不能穿过。 The phase line and the line of the line must pass through the transformer at the same time, and the protected land line (PE) cannot pass through. 零（N 或PEN ）线不允许重复接地。 The zero (N or PEN) line is not allowed to repeat ground. 剩余电流互感器安装在配电线路上的正确方式见图1 The correct way the residual current transformer is installed on the distribution line is shown in figure 1 若剩余电流互感器监测的线路没有发生漏电，探测器/ 监控设备显示电流为用电负载正常的漏电流（一般的用电设备，如灯、家用电器，每个0. 5mA） If the rest of the circuit of current transformer monitoring leakage does not occur, the probe/display current of power load monitoring equipment normal leakage current (general electric equipment, such as lamp, household appliances, each 0. 5 ma) |
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