What are the effects of re-closure shock?

What are the effects of re-closure shock? 
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Answer :

During re-closure, when fault is persisting a person might be subjected to the first shock which would not permanently injure him, but would upset and disturb him temporarily. Next, a single fast automatic re-closure could in a second shock initiated within less than 500 ms from the start of first. It is this second shock, occurring after a relatively short interval of time before the person has recovered, that might cause a serious accident. With manual re-closure the possibility of exposure to a second shock is reduced since the time interval may be substantially greater.  
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