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Transformer - current limiting?
First of all, I would like to apologize for the previous message. It
really didn't serve much purpose, as the pupman server was online the next
time I checked. And, to answer my own question, I will be using the new
transformer, from inside the potential transformer. Now for my question -
Does it need current limiting?
FYI, the transformer can be described as follows:
It's dimensions are 8 1/2" wide, 7 1/2" tall, 8 1/2" long
It has one large HV terminal, with insulator. It then has three smaller
terminals - Two are input, the third is the second HV terminal.
Primary : Secondary ratio is 35 : 1
The entire unit (meaning the entire 250,000 volt step-down transformer) is
rated at 150W.
Primary is rated 5 KV max.
I have done the following experiments, and more -
#1) No limiting - It drew a huge flaming arc in the air, and didn't blow a
fuse. - the output wire got a bit hot.
#2) Same as above, but with a 150 W, 100 ohm resistor across HV(r1). Vr1 =
150v/100 ohm = I = 1.5 amp
#3) A MOT primary in series with Vin (the MOT HV shorted) - It drew another
flame, smaller than the first.
#4) The same as #3, only with the 150W, 100 ohm resistor across the HV(r1).
Vr1 = 50 v / 100 ohm = I = .5 amp
#5) I tried measuring the output current w/out r1 with my DMM, 20A range.
Nothing happened, I must have blown it's fuse.
All of the above were done with ~120 vac in (Vin), and the transformer
itself stayed stone-cold.
Based on the above information Is the following statement O.K.?
The transformer does not need current limiting, so I will have a 5000 volt
1.5 amp source for my TC.
Will I actually be getting 1.5 amps without limiting, or did the 100 ohm
resistor limit the current some other way? Will the rating be different
with a TC, where the tank circuit has little (or no) resistance?
Thank You,
-Andy Cleary