Here, the soft start is wired up. Paralleled 25 ohm, 50 watt resistors used. Since there is a total of 125 uf for the filter cap assy, the step start has to be done very carefully, with the requisite delay...typ 5-10 seconds. 12.5 ohms is used because if say 25 ohms used....the B+ will come up to almost max, but won't reach max, since the magnetizing current on the paralleled plate xfmr's primary's will still flow through any step start resistor...creating a V drop across the step start resistor assy....so you never get the full 240 vac applied to the xfmr's primary. Once shunted, you end up with a secondary surge. To minimize the secondary surge, a lower value is used for the step start resistor assy. Regardless of value, when T=0, you always end up with the full 240 vac dropped across the resistor assy.
Paralleled 4 ga teflon wire used. Mercury contactors used. I found a pair of 250 amp supercon connectors, cheap, on ebay, so notified Scott asap....and he snagged em. These go on the power cable ......and plugged into the mating (existing jacks) on the back of the HV supply. This supply gets a bit more complex, since the pair of identical 7.5 kva (5300 Vac) plate xfmr's will reside in a separate cabinet. The HV supply is getting there.....albeit slowly, due to time constraints.
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