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High Voltage Filters
Hi everyone!
I am trying to find the best way to filter high frequencies and HV kikcbacks to
protect my x-formers (two units in parallel).
First I thought to use a system with two units of capacitors with one leg
grounded to RFG, and some chokes or Resistors, and of course a safety gap.
But I read somewhere that this design (one capacitor from each HV output to
RFgnd) was working only if my transformer was center tap and the core grounded,
and I don't understand why it is like that.
I don't know if my x-formers (they are not NST's) are center tap or not, and I
don't know if the core is grounded ( how do I check those two points)
But my idea was to ground the x-former case to the house ground (It cannot be
touch by sparks) and the bypass caps to RF grounds. For me, a cap has a very
low impedence -at- high frequencies, and RF parasits would be trapped in those
caps insted of going in the trannies windings... But obviously, this only works
for center tap transformer...
Can someone help me with this? what capacitance should I use for the bypass
caps?
I have a last question about the low voltage filter. Every low commercial
filter I have found is design to protect what you plug in from interferencies
from the house circuit (like a computer), but what we are trying to do here is
the opposite : protect the house circuit from interferencies. Are those devices
working both ways?
Thank you for your help
Sam