Increasingly busy issues can be operated in order by high-speed computer, automatic equipment and communication system. But the working voltages of these sensitive electronic equipments continuously decrease. The quantities and scales are constantly expanding. The possibility for being struck by overvoltage, especially lightning, is greatly increased. The equipment damage caused by lightning strike has accounted for a large proportion of hardware maintenance.
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With the accelerating pace of financial electronic construction, electronic devices are widely used in the operating system of financial networks. These high-precision electronic computing devices are enriched with a large number of CMOS semiconductor integrated modules that are hardly resistant to overvoltage and current, and are not guaranteed to operate safely in the event of a lightning strike in a particular space.
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