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Re: NEON DATA


Jim,
The transformer that I have is a non power factor corrected one.
Barry

 ----------
|From: "tesla-at-poodle.pupman-dot-com"-at-PMDF-at-PAXMB1
|To: Benson Barry; "Tesla-list-subscribers-at-poodle.pupman-dot-com"-at-PMDF-at-PAXMB1
|Subject: Re: NEON DATA
|Date: Thursday, November 14, 1996 3:09AM
|
|<<File Attachment: 00000000.TXT>>
|From jim.fosse-at-bdt-dot-comWed Nov 13 23:12:13 1996
|Date: Wed, 13 Nov 1996 06:49:18 GMT
|From: Jim Fosse <jim.fosse-at-bdt-dot-com>
|To: tesla-at-pupman-dot-com
|Subject: Re: NEON DATA
|
|
|>Date: Mon, 11 Nov 1996 01:56:00 -0400 (EDT)
|>From: Benson_Barry%PAX5-at-mr.nawcad.navy.mil
|>To: tesla-at-poodle.pupman-dot-com
|>Subject: NEON DATA
|>
|>
|>Hi All,
|>I made a few measurements on a Jefferson 15,000 volt, 60 mA
|>neon sign transformer:
|>Secondary resistance of terminal 1(near ground lug)        :  3.375 Megohm
|>Secondary resistance of terminal 2(near 120V terminals):  4.2 Megohm
|>Inductance:  meter went beserk.  Couldn't get a reading!
|>
|Berry,
|    I smoked a Jefferson Electric 15kV 60mA neon 6 months ago and
|took it apart. There is a tertiary winding on top of the primary with
|an Aerovox 120-0708 P149F269 660VAC cap across it for power factor
|correction.  Guaranteed to make the LCR meter go berserk.
|
|[snip]
|>Then I used Howe's method (page 453 of Radiotron Designers Handbook
|>4'th edition) plotting C VS 1/Fsquared to find the self capacitance using
|>the x intercept formula x = (x1y2 - x2y1)/(y2 - y1) where
|
|thanks for the reference.
|
|
|>Can this be done this way?  If not please correct me!
|[snip]
|>The hot end of this capacitor was also connected to
|>a high voltage voltmeter with an input impedance of 1 Gigohm (Collmer
|>Semiconductor, Inc, "Digital H.V. meter" Model # CS5190A1) to act as a
|>peak reading DC voltmeter.  All high voltage DC measurements (HVDC)
|>were made this way.  AC measurements (HVAC) were made with a Hipotronics
|>high voltage probe (Model #: KVM-200D, part #: 45-125 (used the stack 
only))
|>with a maximum frequency of 1Khz, an impedance of 750 Megohm, and a
|>ratio of 2000 to 1.  The Hipotronics probe was connected to an 
oscilloscope.
|>The ground side of the probe was connected to the grounded case of the
|>transformer.  Measurements from the scope (1 Megohm, AC coupling)
|>were made with automatic cursor lines with direct digital readout.
|>
|Drool, envy.  Can I come over and play in your lab;);)
|
|
|I'll have to reformat the data to read it;( It's collumnization didn't
|make it across the internet.
|
|
|    jim
|