Help rebuild filter board

[jamorais]

Hello everyone.
I need your expert advice on what i think is a simple matter.
I believe i have a 3 phase mains filter board from an industrial rectifier.
The thing is very corroded and it seems it have been tampered with before.





Now this is what i came up with after tracing.


Makes sense?
Seems to be only some X2 caps and discharge resistors.
X2 between Ls and N are X2 0.47uF 275V
X2 between PE and L-N are X2 4.7nF 275V
Discharge resistors seem to be 10Mohm

What improvements do you think i could make, if any?

[jonpaul]

need schem of rectifier and load to comment.

Very high transient energy on 3 ph industrial mains bus due to inductive loads.

j

[jamorais]

Thank you jonpaul.
I wish i had the schematics for the rectifier.
I can tell you that these are rectifiers used for plating lines.
Their typical load on the output is around 12VDC - 800A (max 2000A), and about 400VAC - 25A in the input.

Hope it helps a little