SPD电压保护水平选择方法探讨

摘要

As per current technical specifications for protection against lightning, the withstand voltage level of equipment, the line length between the protected equipment and SPD, line shield, grounding, space shield and other factors relating to the selection of SPD voltage protection level are analyzed; the formulas for selection of SPD voltage protection level in different conditions are summarized.%根据现行防雷技术规范，分析与选择SPD电压保护水平值有关的设备耐压水平、被保护设备与SPD 之间的线路长度、线路屏蔽、接地情况、空间屏蔽情况等因素，总结出各种情况下选择SPD电压保护水平值的公式。