Re: Here's my proposed power supply setup.

--- In CAD_CAM_EDM_DRO@y..., "JJ" <jj5412@e...> wrote:

> As far as fusing, you need a fuse on the primary (120v/230v) side. I
> believe for you this would be:
> 50 / 120 * 14 = 5.8, I would round up to 7, 8 or so. Oh yeah, must

be a

> 250v fuse.
>
> For the secondary (50v) side, you need a fuse right off the

secondary,

> before it goes into the rectifier, probably 15 or 20 amps. You

want a

> 250v fuse here too.
>
> As far as fusing the supply to each drive, have at it.

Just to add....

For the Primary and Secondary Fuses, they should be "Slow Blow".
The inital rush of current to charge the filter caps can be quite
high but for a very short duration.

And the Drive Fuse, I would think should be "Fast Blow"?

Also remember that the primary reason for a fuse is to protect
circuitry that preceeds the fuse. For Example the Primary Fuse
protects the wiring in the home between the Mains Circuit Breaker,
the outlet and your power supply cord, on/off switch, wiring, etc.

Remember those old round house fuses?
The ones you would remove, and there would always be a penny behind
it.
I've wondered what would be the amp rating of a 1946 Lincoln Cent.

Tom M.