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Why are we going to lightning protection with three class(二)

 Why are we going to lightning protection with three class(二)

Three lightning is because energy transmission lines will need to bleed, gradual induction LEMP ( lightning electromagnetic pulse radiation ), for the builing with Information systems,three lightning is lower cost, more fully protect choice.

Since the energy of lightning is very great, bleed through classification method, the lightning energy gradually vent into the earth . Tremendous energy of the first stage may be for a direct lightning strike lightning current discharge , or when the power transmission lines will be conducted subject to direct lightning discharge may occur for a direct lightning strike possible, must be carried out of the lightning protection CLASS-I .Enormous energy lightning discharge conduction were likely to have a direct lightning strike possible, must be carried out the lightning protection  CLASS-I 's . 

The second level is for the pre- SPD residual voltage and lightning protection zone sensing device , the larger the lightning energy absorption occurs for the first stage , there will be a part of the equipment or the third stage in terms of surge arrester is still quite enormous energy will be transmitted over the need for further absorption of the second stage of surge protector . Meanwhile, after the first stage of the transmission line will be  induced lightning electromagnetic pulse radiation LEMP, when the line is long enough ( over 15 meters ) lightning energy becomes large enough to require a second level SPD further on the implementation of the lightning discharge energy .

Similarly, after the second stage of the transmission line will be lightning induced lightning electromagnetic pulse radiation LEMP, when the line is long enough lightning 's energy becomes large enough , the third stage is through the second LEMP lightning arrester residual energy level of protection.
    
Thus, the third stage lightning distance transmission lines to the end device should not be more than 10 meters , in order to avoid damage to equipment caused by LEMP .

For more information on surge protective device  , please pay attention to our official website:www.fatech-surge-protection.com.
                                                                                                                                                                                                       
 FATECH ELECTRONIC LTD.
NOV.29,2014                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                                                                                      

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