论文部分内容阅读
通信电源系统多级防护如图1所示。电源系统由LPZ0区进入室内LPZ1区采用多级防护,将过电压降到设备能承受的水平。1电源多级防护电源系统采用多级防护后,对雷电电磁脉冲进行逐级递减,使其传播到设备使用端的幅度,被限制在设备能承受的范围内。由于用电设备电压等级不尽相同,其最大持续电压也不一样,所以图1所示的多级防护示意图不是对所有设备都必须如此,根据实际使用情况可以删减。多级防护的原则是:前级的通流量设计较大(通信防雷一般设计指标最大通流量达到20kA即可),后级通流容量
Multi-level communication power system protection shown in Figure 1. Power system from the LPZ0 area into the indoor LPZ1 area with multi-level protection, the over-voltage dropped to the level of equipment can withstand. A multi-level power supply protection system using multi-level protection, the lightning electromagnetic pulse step by step, so that it spread to the use of the device end of the range, is limited to the range of equipment can withstand. As the voltage levels of electrical equipment vary, the maximum continuous voltage is not the same, so multi-level protection diagram shown in Figure 1 is not necessary for all devices, according to the actual usage can be reduced. The principle of multi-level protection is: pre-large-scale design of the larger flow (general lightning protection communication design indicators can reach 20kA), after the level of flow capacity