ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
VDE 0100 to introduce AFCIs
by sparky. 01/19/18 08:03 PM
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
FPE in Germany
by HotLine1. 01/17/18 07:07 PM
Fujifilm Recalls Power Adapter Wall Plugs
by Admin. 01/16/18 07:04 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 16 guests, and 13 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: 856
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
HCE727
HCE727
Delaware County, PA, USA
Posts: 186
Joined: November 2005
Show All Member Profiles 
Top Posters(30 Days)
Admin 20
sparky 15
Potseal 15
Popular Topics(Views)
243,566 Are you busy
180,366 Re: Forum
170,844 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.019s Queries: 15 (0.003s) Memory: 0.9438 MB (Peak: 1.0607 MB) Zlib enabled. Server Time: 2018-01-20 18:54:55 UTC