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Table 41.1 Assumed Touch Voltage

Former Community Member
Former Community Member
I am a bit confused by this. Why do the disconnection times in Table 41.1 appear to be based on a touch voltage of 100 volts rather than a touch voltage of 125 volts?


For example, 110% of 230=  253 volts. Assuming L and PE are of the same size and material, indirect contact touch voltage is 126.5 volts. Would 0.33 seconds not appear more realistic?  


From IEC 61200-413


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  • mapj1:

    A very similar curve is in the older editions too. However the pinhole breakdown mechanism is thermal, and takes a some tens of milliseconds to occur


    That fits well with the experience, starting as a tingle for a noticeable time, and ending with a trip.  You're more daring in your sharing (of the standard's figure!) - it's certainly better than my written description.

     


Reply
  • mapj1:

    A very similar curve is in the older editions too. However the pinhole breakdown mechanism is thermal, and takes a some tens of milliseconds to occur


    That fits well with the experience, starting as a tingle for a noticeable time, and ending with a trip.  You're more daring in your sharing (of the standard's figure!) - it's certainly better than my written description.

     


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