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Two case studies on energy and protection level coordination of an SPD system

机译:SPD系统能量和保护级别协调的两个案例研究

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摘要

There are various factors that may be responsible for allowing lightning related equipment damage. If lightning protection measures have not previously been implemented, it is possible to lessen the damage by installing Surge Protective Devices (SPD's). However, it is a problem when lightning damage has occurred in spite of the fact that lightning protection measures have been taken. In such cases, the damage may have happened because (1) the energy handling capabilities of the SPD's were not coordinated properly, (2) the SPD was not selected on the basis of its effectiveness for the particular equipment to be protected, and/or (3) the grounding conductor connected to the SPD was too long. It has been confirmed that lightning related damage to equipment can be caused by the lack of sufficient current withstand capability of the SPD or by insufficient protection coordination between SPD's and the equipment to be protected. We introduce actual cases of lightning protection measures.
机译:造成雷击相关设备损坏的因素可能多种多样。如果以前没有采取防雷措施,则可以通过安装电涌保护器(SPD)来减轻损坏。但是,尽管已经采取了防雷措施,但是仍然发生雷电损坏是一个问题。在这种情况下,可能会发生损坏,原因是:(1)SPD的能量处理能力未得到适当协调;(2)SPD的选择没有根据其对特定受保护设备的有效性而定,和/或(3)连接到SPD的接地导体过长。已经证实,由于SPD的电流耐受能力不足或SPD与要保护的设备之间的保护配合不足,可能导致与雷击有关的设备损坏。我们介绍防雷措施的实际案例。

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