I am bench testing my servo system and put together a dc power supply for it.
When I apply power, the transformer hums and the rectifier pops shortly thereafter.
I have not hooked up the servo drive or motor yet.
The transformer is hooked up to output 60 volts. The rectifier is rated 1000v 50a. I put a 200 ohm resistor in the transformer output for testing purposes .
It works ok with just the smallest capacitor ,100v dc 1000mfd. When I hook up any of the others, 200vdc 1000 mfd and the big one 450 vdc 1500 mfd, the resistor gets very hot even with no load on the power supply. (The fuse is removed)
Electronics is not my area of expertize, so I have been working slowly and carefully to avoid damaging anything expensive.
All the grounds are connected to the bar on the left side including the dc negative wire. The ground bar is connected to the ground wire outside the service panel in my basement.
I have four more rectifiers coming by mail order from Hong Kong plus I picked up a couple of eight amp units at Radio Shack to use until I find out what I am doing wrong!