hp 6030a damaged capacitors?

[Fiorenzo]

I bought an hp6030a power supply (0-200volt 0-17amp).
It was set for 120volt line voltage input and someone converted It to 220 voltage mistakingly.
The internal switch has been set to 240volts input but there was also a cable near the smoothing capacitors that was left to 120volt option... you can move it to a 240volt tap.
I think that this cable puts the capacitors in a series configuration to double the maximum voltage rating that is 200v as stamped on them.

So, do you know how this power supply works? Do you think that the capacitors bank could have been damaged?

Thank you.

[Fiorenzo]

attached is the schematic where is possible to see the 220volt and 120volt tap

[Fiorenzo]

also S1 switch was left to 120volt instead of 220volt.
see attached schematic

[Fiorenzo]

actually i think the configuration is of a bridge rectifier voltage doubler....
the 120volt tap doesn't put the capacitors in parallel but instead let the circuit to double the input voltage
now i wonder what damages could have been happened to the power supply....m

[Performa01]

I think you're on the right track. The capacitors should be fine and the switch S1 is only an inrush current limiter which protects the mains fuse and the rectifier at best. If both of them are still alive, then its incorrect setting quite obviously didn't do any harm.

[Fiorenzo]

so, i have checked all the capacitors with a cheap ebay ers meter.

the values I read are almost similar 1800uF 0,13ohm ers at 50hz 0,6%vloss.

Is this ok or should I read a lower ers for these special purpose capacitors? (1800uF 200volt low ers caps.)

thank you