> It seems to me that a primary step start is a much better way to go, if
> one
> is even needed. As long as the breaker don't trip and the diodes can
> handle
> the peak current.
But the series R between the rectifier and filter C should still keep
current limited in the event of a filter C short -- and hopefully, assist in
protecting the rectifier stack. That's something the step-start circuit
cannot protect after the initial "step" sequence.
My "take away" from this discussion is that a distributed surge suppression
approach may be best comprising of: 1) primary step-start to strictly limit
filter C in-rush current, 2) series R between the rectifier and filter C for
rectifier preservation during a C short; and 3) Series R close to the anode
for arc-fault protection of all HV cabling, inter-compartment HV connectors
and components ahead of the anode.
Regarding placement of series R between the rectifier and filter C on a gg
amplifier with a traditional elevated HV(-) return, I am still pondering
whether that R should be broken up in equal amounts of say 10-ohms each
between both HV terminals and the filter C. In other words, is there some
fault condition where a surge resistor placed in the HV(-) lead between the
rectifier and filter C that would assist in fault protection?
Paul, W9AC
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