I want to build a HV DC power supply for a tube amp ( 1.2 kV at about 500 mA). I intend to make it light using multiple voltage multiplier stages and no transformer... Having no transformer I am facing the following problem. If I use a schematic like this one:
And I consider the case of the power supply to be the ground it is very important how I connect the plug and which wire is the phase and witch one is the neutral because I could end up with the phase connected to the case.
Another method could be using a pair of Switching Relays that work at 220 V and automatically connect the phase and neutral to the desired position and create something similar with this schematic:
The problem with the second approach is that using modern household circuit breakers (like RCCB circuit breaker), the solution does not work.
Can you please advise me how to do this?