GTE Sylvania electronic Systems Group - Western Division out of Mtn View, CA
did a Phase I Report entitled:
Power Line Alarm Transmission Systems
Phase I Report
Power Line System Characterization
by Dr. Donald L Hardison, K M Duvall
Contract Number 35623
27 June 1973
This document describes work performed by GTE Sylvania Incorporated
under contract tot he Aerospace Corporation by the Law Enforcement
Assistance Administration of the Department of Justice. The work described
is a power wiring system characterization sample study carried out on two
single-unit single family residences, one multi-unit single family
residence, and one multi-story office building. Because of the restricted
statistical nature of this data base, no universally applicable conclusions
may be drawn concerning residential wiring.
This report is full of charts, graphs, variations in grounding, test setups,
etc. Very well documented effort.
In 1975 in an effort to design an inexpensive computer control/monitor
system utilizing the AC mains, I characterized AC mains in several buildings
in the Campbell, CA area which matched this report's conclusions fairly
closely. [Unfortunately, the report was not available 'til after the work
was done!]
Good luck.
If you can't find it, stop by and I'll loan it to you to make a copy. <g>
- Robert -
-----Original Message-----
From: r...@itsqs.com <r...@itsqs.com>
To: m...@california.com <m...@california.com>
List-Post: emc-pstc@listserv.ieee.org
Date: Tuesday, November 16, 1999 5:10 AM
Subject: RE: 60 Hz Power Line Impedance
>Can you provide or specify the government document to which you refer? I am
>trying to locate a source of information for 'typical' mains.
>
>Thanks in advance.
>
>Bob Martin, PE, NCE
>
>Sr. Technical Manager
>Intertek Testing Services
>(978)263-2662
>fax(978)263-7086
>r...@itsqs.com
>
>The opinions expressed are my own and not necessarily those of my
>employer.
>
>
>-----Original Message-----
>From: Robert Macy [mailto:m...@california.com]
>Sent: Monday, November 15, 1999 6:56 PM
>To: Price, Ed; 'Robert Johnson'
>Cc: emc-p...@ieee.org
>Subject: Re: 60 Hz Power Line Impedance
>
>
>
>For our building we used a 1500W glowing (resistive impedance load) heater.
>Measure before, then turn on measure after and calculate the impedance.
>Also measure adjacent branches to get a feel for how much impedance was in
>the branch and how much was at the transformer and drop.
>
>This is more accurate than one would expect since about 10% of the power
>gets dissipated in your wiring.
>
> - Robert -
>
>PS If you're after the "average impedance" for AC mains up to 2MHz,
>somewhere around here I have a 1 inch thick government report where they
>paid to characterize single family homes, multiple dwellings, and small
>businessess. It shows not just the characteristic impedances, but also
>expected attenuation. In otherwords, tells what a local area network guy
>needs to know to design his system. By the way, the best range for
>communications is between 100KHz and 400KHz centering at 200KHz. But be
>careful, all the wireless intercoms use that 200KHz band.
>
>
>-----Original Message-----
>From: Price, Ed <ed.pr...@cubic.com>
>To: 'Robert Johnson' <robe...@ma.ultranet.com>
>Cc: 'emc-p...@ieee.org' <emc-p...@ieee.org>
>Date: Monday, November 15, 1999 2:14 PM
>Subject: RE: 60 Hz Power Line Impedance
>
>
>>
>>Robert:
>>
>>This is where I started to have a problem. Voc is easy, but Isc is more of
>a
>>breaker response test. Someone must have an interesting procedure for
>>powerline impedance testing, maybe defining some time limit.
>>
>>Ed
>>
>>
>>
>>> -----Original Message-----
>>> From: Robert Johnson [SMTP:robe...@ma.ultranet.com]
>>> Sent: Monday, November 15, 1999 8:10 AM
>>> To: "Price,"@ma.ultranet.com
>>> Cc: 'emc-p...@ieee.org'
>>> Subject: Re: 60 Hz Power Line Impedance
>>>
>>>
>>> Can't you just measure the open circuit voltage and the short circuit
>>> current?
>>>
>>> "Price, Ed" wrote:
>>>
>>> > As to measuring the AC power source impedance, well, time to go home
>>> now!
>>> >
>>> > Regards,
>>> > Ed
>>>
>>>
>>:-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-
)
>>Ed Price
>>ed.pr...@cubic.com
>>Electromagnetic Compatibility Lab
>>Cubic Defense Systems
>>San Diego, CA. USA
>>619-505-2780 (Voice)
>>619-505-1502 (Fax)
>>Military & Avionics EMC Services Is Our Specialty
>>Shake-Bake-Shock - Metrology - Reliability Analysis
>>:-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-
)
>>
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