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Anonymous Poster

underground fault detection

08/14/2008 11:03 PM

- What is the best method/instrument for underground fault detection

- is there a good web site explaining the most popular methods

- Is there a set of calculation or rule of thumb to use for the voltage and current magnitude on a thumping method. Let us say the voltage is 15 kv rated on 3 phase 13.8kv system, cable length 5,000m.

- what is the best method to detect the fault on open neutral, and also for low voltage 600, 208, 3 phase underground cable fault

- is there different methods to be used for cables with uninsulated grounding cables
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: underground fault detection

08/15/2008 3:18 AM

<...What is the best method/instrument for underground fault detection...>

Mk.1 eyeball. Look for a huge crater. The fault is there somewhere.

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V.I.Abraham
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Safety - ESD - New Member India - Member - New Member Engineering Fields - Energy Engineering - New Member

Join Date: May 2007
Location: Pune , India
Posts: 875
Good Answers: 42
#2

Re: underground fault detection

08/15/2008 10:51 AM

The best and fast method of locating Under ground cable fault is to trace the fault with the help of a cable fault locater. I am using an APLAB make ( Manufactured by M/S APLAB India Pune) cable fault detector and the instrument pinpoints the fault location. I am fully satisfied with their instruments. Visit the following link to see the various models manufactured by them.

http://www.aplab.com/cfl/cfl02.htm
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noshorts
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Join Date: Jun 2008
Location: Olive Branch, Ms. USA
Posts: 124
#3

Re: underground fault detection

08/18/2008 5:44 PM

A thumper works best for underground electrical cables. Communications faults can be precisely located with a TDR (time domain reflectometer)

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