"Brian Gaff" wrote in message
m
I got the impression he wanted to short the ht out to
make it safe though. Another thing to ask is is the load
inductive? When I could see Ive welded many a rely like
this!
I guess for the crobar effect one could use a
semiconductor, and maybe one the other way around so to
speak to do the soft rise in voltage. Its a highish
current, but not impossible.

Legacy crowbar - fire a thyratron.