弱电设备远距离供电探讨

Discussion on Long Distance Power Supply for ELV Equipment

针对离电源点较远的弱电设备取电较难、供电距离较长的问题,结合宽电压输入范围直流电源的实际电压输入需求、规范要求的电压降范围,在满足接地故障保护、短路保护等要求的前提下,进行计算和分析,提出远距离场所弱电设备低压供电距离的观点。

Given the problem that it is difficult to obtain power from ELV equipment far away from the power supply point and the long power supply distance,combined with the actual voltage input demand of DC power supply in the wide voltage input range,the range of voltage drop required by relevant codes,and under the premise of meeting the requirements for earth fault protection,short circuit protection,etc.,calculations and analyses are made to put forward the viewpoints on the distance of low-voltage power supply of ELV equipment in faraway places.