Re: Surge / Ground / Lightning

In alt.engineering.electrical bud-- <remove.budnews@[EMAIL PROTECTED]
> wrote:
| phil-news-nospam@[EMAIL PROTECTED]
 wrote:
|> In alt.tv.tech.hdtv bud-- <remove.budnews@[EMAIL PROTECTED]
> wrote:
|> 
|> | Previously you said Martzloff "flubbed the experiment".
|> 
|> I remember that.  You were telling me about some information he had
|> obtained from some experiment.
|>  
|> | Now you agree with Martzloff that branch circuit must be 200m for 
|> | transmission line behavior with 1.2 microsecond rise time.
|> 
|> That's not a result of an experiment.
| 
| "*From this first test*, we can draw the conclusion (predictable, but 
| too often not recognized in qualitative discussions of reflections in 
| wiring systems) that it is not appropriate to apply classical 
| transmission line concepts to wiring systems if ..."
| 
| As usual, you don?t know what was written.

What what kind of surge did Martzloff use to carry out that test?


|>  I'm not so sure the exact distance
|> is 200m for that exact rise time.  But that is a subjective thing.
| 
| Quit equivocating. Where is your cite. Like for nanosecond risetimes.

Observation.


|> | You say that doesn't apply because surges are faster. Martzloff uses
1.2 
|> | us because that is a standard rise time for surges produced by
lightning 
|> | as defined in IEEE standards.
|> 
|> Martzloff did not say that was a defined standard in the statement you
|> quoted.  He just used it as an example to come up with the 200m figure.
| 
| He used it because 1.2/50 (voltage) is an IEEE standard. The 8us from 
| w_?s engineer is another standard (8/20 current).

The standard for what?  The typical surge?


|> | w_' professional engineer source says 8 micoseconds with most of the 
|> | spectrum under 100kHz.
|> 
|> Even with 1 nanosecond rise time, most of the energy will be present in
|> the spectrum below 100 kHz.  That means nothing when the surge is
strong
|> enough to have energy above some frequency that is relevant to the
whole
|> system involved that can do damage.  That frequency might be 100 Mhz
for
|> some thing, and 1 GHz for other things.
| 
| Still missing ? your source. Nanosecond risetime. 100MHz spectrum.

Observation.  Of course this is a concept you cannot understand.


|> | You still have *no sources that sup****t your belief* that risetimes
are 
|> | far faster.
|> 
|> I have experience and observation for that.  I need no more.
| 
| Lots of people have experience and observation with flying saucers.
| 
| The rest of us want a source.

The only flying saucers I have seen are the ones I've tossed.

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