建筑物防雷引下线断接卡,通常作法均按全国通用电气装置标准图集《建筑物、构筑物防雷设施安装》(D562)进行。这种作法在多数地区是适用的,然而对高寒地区却有一定的问题,主要是冻害。例如,佳木斯极端最低温度为-41.1℃,冻土深度为-1.95米,雷暴日数33.1日/年。由于地处三江平 The lightning protection off-line break-cards for buildings are usually carried out according to the National General Electric Apparatus Standard Atlas “Installation of Buildings and Structures for Lightning Protection Facilities” (D562). This practice is applicable in most areas, but there are certain problems in the high-cold areas, mainly frozen damage. For example, the extreme minimum temperature of Jiamusi is -41.1°C, the depth of permafrost is -1.95 meters, and the number of thunderstorm days is 33.1 days/year. Due to its location in Sanjiangping