RE: Masuring Current Spikes on Pole Transformer Primary sidee

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Mccauley, Daniel H by way of Terry Fritz <teslalist-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>



 > BTW, my storage scope is a TEK 2430, not the "A" version. If
 > you think the
 > 2430A has a bit of a learning curve, you ought to try the
 > 2430! Layer after
 > of hidden menu screens to configure the storage options, etc.
 > At least the
 > 2430A's I've used had an "autoset" feature that would allow a
 > one-button
 > setup as long as any input signal was present.
 >
 > Regards,
 > Scott Hanson

Yeah, I'm not really familiar with the 2430 oscilloscope.  I've seen 2430M
oscilloscope, but I'm not sure what
the difference is between that scope and a 2430A either.

The Captain







 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Monday, April 07, 2003 11:44 AM
 > Subject: RE: Measuring Current Spikes on Pole Transformer Primary side
 >
 >
 >  > Original poster: "Mccauley, Daniel H by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>
 >  >
 >  >
 >  > The test set-up is extremely simple.  All you need is an
 > oscilloscope and
 > a
 >  > Pearson current monitor.  Simply put the primary (240VAC
 > side of pole
 >  > transformer) and monitor with oscilloscope.  Use a storage scope to
 > capture
 >  > these high current transients.  You could also repeatedly
 > capture the
 >  > transient spikes on a regular oscilloscope if you trigger
 > it properly, and
 >  > with lots of luck!  If you don't have a storage oscilloscope, the
 > Tektronix
 >  > 2430A digital oscilloscopes work well although have a bit
 > of a small
 >  > learning curve.  I have (3) 2430A oscilloscopes if you are
 > interested in
 >  > purchasing one.  $500.00 each in excellent condition (no
 > probes or manuals
 >  > though)  They are left over from my business.
 >  >
 >  > The Captain
 >  >
 >  >
 >  >
 >  > "Unless you use a scope across the input to see the "peak"
 > power levels
 >  > ...... "
 >  >
 >  > Dr. R -
 >  >
 >  > Can you describe the EXACT test setup that was used to
 > enable you to see
 > the
 >  > 40-50 KVA spikes? What instrumentation was used, how was
 > it connected, and
 >  > what steps were taken to ensure that the test setup was
 > not picking up RFI
 >  > or EMI from the operating Tesla coil?
 >  >
 >  > Regards,
 >  > Scott Hanson
 >  >
 >  >
 >  >
 >  >   > Original poster: "Dr. Resonance by way of Terry Fritz
 >  > <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>
 >  >   >
 >  >   >
 >  >   > If you are using a pole xmfr with external reactor you
 > need to realize
 >  > that
 >  >   > the pole xmfr, on very short pulsed cycles, will draw
 > as much as 50
 > kVA
 >  > for
 >  >   > very short current spikes.  These are not evident
 > unless you use a
 >  > storage
 >  >   > scope connected across the primary side.  The short
 > high power spikes
 >  > occur
 >  >   > just as the reactor tries to saturate.  A standard 10
 > kva pole xmfr
 > may
 >  >   > operate at short pulses of 40-50 kVA when used with a standard
 >  > non-saturable
 >  >   > reactor design.
 >  >
 >  > (snip)
 >  >   >
 >  >   >  > Dr. Resonance
 >  >   >
 >  >
 >  >
 >
 >