From: Sparktron01@comcast.net
To: teslalist@twfpowerelectronics.com (Terry   Fritz)
Subject: TCBOR Guide to CSN Parameter List
Date: Sat, 25 Jun 2005 04:12:43 +0000
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X-UIDL: ]GA"!S;`"!@PJ"!;JY!!

Terry

I will try to provide information from this commentary, based on final "best operating result" parameters of CSN machine.  Since Tesla modified the configuration of this machine significantly on a nearly daily basis, getting
the "optimum" configuration will probably be a task best left for the modelling
tool rather then our conjecture   O :^/   Factual information for power limits I will attempt to provide...

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With Antonio's brand new TRSSTC engine, we can do Tesla's Colorado Springs 
coil now!!! ;-))

However, I don't have Richard Hull's analysis of that coil, and I have no 
idea what the numbers are.  If anyone would happen to know any of the 
following it would sure help?
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Here is CSN Guide based info on CSN Machine configuration 12/17-31/1899
during photographic sessions.

* Cprimary = < 0.153uF, (0.304uF each side) --"Tesla Equidrive" topology >
* Rprimary = < My guess, size as 7 - # 1/0 cables, allow 170 feet total length
                     actual primary L = 162 feet + 10 feet hookup >
* Lprimary = < 56uH single turn >
* Lsecondary = < 9.5mH, 2 x #10 bifilar wound, 17 Turns>
                         1. Lowest 14 T 2-5/8" separation
                         2. Next     2 T = 4" separation
                         3. Last (corona turn) = 22-1/2" above 2.
 * Coupling =     < 0.54 to 0.6, depending on configuration >
* Rsecondary =  < Base on either 1-#6 or 2-#10 AWG cables
* Csecondary =  < IDK, base on OD of 49.25', with winding spacings as above>
(*) Transmission Line = ~ 21' long, ~ 3' mean above ground plane. 
                                     size is unknown, probably #10 or #6.
* Ltertiary =        < 18mH; 8' OD x 8'-3" tall, 98 turns>
* Rtertiary =       < Base on 1-#6 cable >
* Ctertiary =      < Calculate based on 8' OD x 8'-3" tall.  Lowest winding of
                            tertiary is 4'-6" above floor (ground plane) >  
(*) Cload  = 1 or 2 30" Dia. Aluminum Spheres.
* VCprimary Initial Value =  22,500V or 45,000V <See Note 1>
* BPS =  up to 4200 (!!!)


Power Limit (watts) =  40-50kW< See Note 2>

General Notes:
(1)   Westinghouse Transformer had a nameplate rating of 50kVA.
        Primary was 120 x 240 (split design very similar to today's NEMA
        standard).  Secondary was tapped at 30, 40, 50kV.  Due to Cp 
        explosive bottle failures, Tesla had transformer HV windings modified
        to "multiple arc" (i.e. paralleled) configuration of 15, 20, 25kV nominal.
        Nominal loaded voltage measured was 22.5kV, which matches nicely
        to 50/2kV no load nameplate.  Transformer was oil immersed, single
        phase.  Input power was 1kVAC, 133Hz nominal.  Note line frequency
        back then WAS NOT as tightly regulated as it is today; values Tesla
        measured varied from 125 - 138Hz.  1kVAC was fed through (3)
        paralleled 1kVAC to 120x240 transformers and lightning arrestors.
        Output from Lightning arrestors was fed into primary of Westinghouse
        Transformer.  There was a current limiting inductive choke / reactor
        on 1kVAC  primary side of building feed transformers. 

        Interior lighting, office heat provided by 120x240 transformers.

(2)   As of July 25, 1899 entry, 1kVAC fuses blew at a power draw of ~ 20HP
       (~15kW).  There is evidence during September/October timeframe during
       roof modifications, that 1kVAC feeder damage was sustained.
       The feeder may have been upgraded to larger wires at that time.
       Comments in CSN suggest generator capacity for CS was "1500 lamps"
       where each lamp ~40W (60kW max input??).  If you figure i^2r losses
       "maybe 40-50kW" was available to his lab, at night for "very" short bursts
       of power.  This conjecture is supported by methods used during 
       photographic sessions.

(3)  Power to machine was controlled by a double pole manually operated
      knife blade power switch <Safety disconnect on marginal steroids>!!!
      Can you image the issues the safety folks would have, manually opening
      and closing a 1kVAC switch with NO ARC CHUTES, and the operator fully
      expsed in the event of a switch weld or explosion?  Alex Tajnsek has
      a similar knife blade switch (in excellent condition), only 600V at 1200A!!!
      We will use as a HV (240V primary side) isolation switch, with extra pole
       used to  light a green lamp (safe) or red lamp (hot) in closed position.

Hope this info is helpful, if you need more detailed info, I now know where my
copy of CSN and RH's book is...  :^P

Best Regards
Dave Sharpe, TCBOR/HEAS
Chesterfield, VA. USA