How does power supply company locate a fault?
on 23/01/2018, Brian Gaff supposed :
Underground cables are the most difficult of course as there is no way to
find where the break is unless there is a tell tale crater in the ground
nearby of course!
Actually there is - They can send a pulse down a cable then measure the
time for the pulse to be reflected. Time = distance to fault.
It is commonly used on telephone cables too.
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