ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
250.104
by gfretwell. 02/16/19 01:08 PM
PurpleAir Recalls Power Supply Units
by Admin. 02/14/19 08:43 PM
Utility Company Programs
by katty81. 02/14/19 11:11 AM
AFDD's coming to the UK
by Trumpy. 02/14/19 12:29 AM
Delta Electronics Recalls Solar Inverters
by electech. 02/13/19 10:26 AM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 8 guests, and 14 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Locating Faults In Underground Cables #163749
05/16/07 09:18 AM
05/16/07 09:18 AM
B
BubbaJohn  Offline OP
New Member
Joined: Apr 2007
Posts: 3
South
What method [Or type of equipment] does your company use to "THUMP" your underground cables? We use a Cable Dynamicis/Baur for "Thumping and Radar"
Is there a newer technology for locating the fault in the conductor/cables?

Arc Flash PPE Clothing, LOTO & Insulated Tools
Re: Locating Faults In Underground Cables [Re: BubbaJohn] #164144
05/26/07 06:16 AM
05/26/07 06:16 AM
R
RODALCO  Offline
Member
Joined: Dec 2005
Posts: 857
Titirangi, Akld, New Zealand
We use a BAUA surge generator STA 1100 or thumper.
This method is used to locate faults within an armoured cable or for faults between phase to phase and phase to screen.
We use a Biddle stereo microphone, and magnetometer set for pinpointing the fault.
It pays, prior to thumping to mark out the cable route with a Radiodetection or other cable locator. especially in noisy areas.
Accuracy is within one meter of the fault.

For ground faults in single core cables we use the POPIE ( pool of potential in earth ) method.
This is basically a pulsing HV dc supply, which is short circuit proof.
A testcurrent of about 60 mA is enough to pinpoint the fault within 5 cm. (2 inches)
A balanced µA meter with two probes is used for the pinpointing.


The product of rotation, excitation and flux produces electricty.

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
sparky66wv
sparky66wv
West Virginia
Posts: 2,236
Joined: November 2000
Show All Member Profiles 
Top Posters(30 Days)
Admin 7
BigB 3
Popular Topics(Views)
253,209 Are you busy
189,866 Re: Forum
179,564 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.013s Queries: 15 (0.003s) Memory: 0.9440 MB (Peak: 1.0613 MB) Zlib enabled. Server Time: 2019-02-16 22:08:36 UTC