[RFI] electric fence interference

[wng@daimlerchrysler.com]

At last report, there are a number of 12V battery-operated fence chargers, 
that are not tied to 120Hz timing.  They are often installed with integral 
AC line-operated float chargers, but they continue to operate when the 
line goes down, and so they may have some remnants of 60/120Hz components 
in the noise signal.

Bill Gilmore, Electromagnetic Compatibility Engineer
Core EMC, Electrical/Electronic Engineering
Powertrain Component EMC / RWD, SRT & HEV Platform EMC
DaimlerChrysler Corporation
Auburn Hills, MI






"Mike Martin" <mike at rfiservices.com> 
Sent by: rfi-bounces at contesting.com
03/30/2005 12:58 PM

To
"'David Garnier'" <dgarnier at wi.rr.com>, <rfi at contesting.com>, "'dad'" 
<david.garnier at med.ge.com>
cc

Subject
Re: [RFI] electric fence interference






Electric fences typically pop at regular intervals as the supply is timed 
on
and off. This is normal. On a scope it would appear as a single spike per
120hz. If the cause is the fence wire touching something, even loosely
touching the post insulators, it will be represented by a pattern such as
llll  llll. This is showing the pattern for a width of 60hz. This problem,
like most power line sparking, would be gone during rain. The rain would
short the sparking gap.
If I can assist please call.

Mike Martin
RFI Services
Cell 240-508-3760
Office 301-855-5961
Nextel Direct 164*21*29180
Fax 410-741-5153
mike at rfiservices.com
 
Check out Our Web Site at rfiservices.com
 



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