Aren't these often auto-transformers which provide no isolation between input and output?
> -----Original Message----- > From: Jon Elson [mailto:[email protected]] > Sent: Saturday, June 13, 2015 10:53 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Suitable transformers = hens teeth > > > There are, however, "step down" transformers. These usually have split > primary and secondary windings, so you can configure them for 240 or 480 V > on the primary, and 240 or 120 on the secondary. If you can tolerate running > it at half voltage, set primary for 240 V and supply 120, and then you can get 60 > V AC out of the secondary. Or, get 120 V CT on the secondary and run through > a 2-diode full-wave rectifier to get about 84 V DC with a capacitor input filter. > You can find these in the multi-KVA size. Often machine tool vultures and > industrial surplus places have PILES of them. > > Jon > > ---------------------------------------------------------------------------- -- > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
