Re: [CAD_CAM_EDM_DRO] Re: SS Relays

mrpootoo wrote:

>Ah! I ran into this problem and couldn't figure out what was going on
>for the life of me.
>
>What type of relay do you use for switching DC?
>
>

There are solid state relays for DC use. Crydom, Omron, etc. make
these. If you want a mechanical contact relay, those are available, too.
The problem with DC is there is no zero crossing to allow the arc to
break. Some DC contactors have magnets to bend the arc in a loop,
others use insulating barriers that pass between the opening contacts.
And, of course, if space permits, they just open the contacts wider.

Jon