Re: [CAD_CAM_EDM_DRO] Power supply softstarts

Graham,
I'd put a 40 to 80 ohm, 50 to 100 watt power resistor in series with
your transformer primary, and short it out after about a one second
delay with a turn on delay timing relay. Only two components, and
could probably do it for less than $10.00 in eBay parts.
Dave

>
>What is the "best" way to produce a soft start on the primary of my
>powersupply. Should I just use a contactor, timer and power
>resister to provide a current limited supply to the transformer on
>power up?
>
>