In theory you are right unless your phase converter has built-in disconnects. ? My PP when powered off opens disconnects for T1, T2 and T3 and thus no power is present on any of the legs. ? Different converters might or might not have build-in disconnects.
David Best
toggle quoted message
Show quoted text
On Feb 18, 2020, at 11:30 AM, Shawn Kammerer via Groups.Io < shawnkammerer@...> wrote:
Sorry to confuse. I¡¯m just suggesting a simple visual confirmation for people with power drive or digi?drive. If you¡¯re wired up correctly, your panel will?light up with your converter turned off. If not, then the manufactured 3rd leg is being sent to the panel. So when I wire up a new plug, I plug it in and confirm my panel is only being supplied by the two pass-through legs, instead of the hot leg. I don¡¯t try to run anything with the converter off though, just a simple confirmation that the power drive panel?isn¡¯t connected to the manufactured leg.? On Tuesday, February 18, 2020, 11:01 AM, Airtight: Clamps by Air Compression <airtightclamps@...> wrote: Shawn not sure I understand what your explaining , I am just not recommending single phasing the motor. With your own manufactured 3 phase power the NEC 408 Mark references is the way to go . From the power Co At my shop it makes no difference.? Designing and building for 47 years On Feb 18, 2020, at 12:48 PM, Shawn Kammerer via Groups.Io <shawnkammerer@...> wrote:
?
Mac, I don¡¯t think I¡¯m sending any power to the 3 phase?motors though. The panels don¡¯t take the manufactured leg, which is why it¡¯s so important to get the wiring right, and I¡¯m just making sure I¡¯ve got the right wires going to the right terminals on the plug.?If I were to try and fire up the saw motor with the converter off, that would be a different story. But I¡¯m even less of an electrician than you. I¡¯m probably screwing something up, but what we don¡¯t know can¡¯t hurt us, right? On Tuesday, February 18, 2020, 10:32 AM, mac campshure via Groups.Io <mac512002@...> wrote: Shawn, Sending two legs of power to a 3 phase motor is never a good idea.? The term is singlephasing. But I am not an electrician just a hack or copy cat. Mac,,, Designing and building for 47 years On Feb 18, 2020, at 11:51 AM, Shawn Kammerer via Groups.Io <shawnkammerer@...> wrote:
?
I¡¯ve got an American Rotary ADX20, and the manufactured leg is definitely hotter than the other two legs. My understanding is that the manufactured leg is only used to fire up the main motors, and doesn¡¯t send any added power to the power drive panels. So the way I tripple-check when wiring up a new plug is plug in the machine and see if the panels and controls work with the converter off. If it does, then it¡¯s being fed by the two pass-through legs, not the manufactured leg. But I would be very surprised if the panel would burn out that fast from just raising the blade height once, even if it was getting extra voltage by being wired incorrectly.?
-Shawn On Tuesday, February 18, 2020, 9:34 AM, Airtight: Clamps by Air Compression <airtightclamps@...> wrote: As way say around here stuff happens . ok I will wake you tomorrow with spring flowers from your beautiful gardens Mac,, Designing and building for 47 years ?
CORRECTION.
Mac rousted me up this morning about wire colors and electrical connections to phase converters. ?I have documentation from Felder that suggests the brown wire should always be on the phase converter manufactured leg, Mac had contradictory information. ??I started to wonder if dementia was finally setting in. ? So I called Felder service in Delaware.?
Apparently Felder had been inconsistent over the years in connecting the AC cable to the control panel electronics within the machine. ?As such, it appears that some minds changed a decade ago about which color wire is connected to the control circuits of the machine. ? According to the service tech, the brown wire is supposed to be kept OFF the manufactured leg from the phase converter. ? I¡¯ve revised the write-up I posted previously and the corrected version is attached. ? Sorry for any confusion.
Phase converter outputs could be connected as follows if using plugs and sockets for 3-phase connections to the machine: ?T1 output connects to L1 on the receptacle, T2 connects to L2, T3 connects to L3. ?The brown wire belongs on L2, the black and grey wires on L1 and L3. ?The black and grey wires should be reversed if the motors are running backwards.
Sorry for all the confusion.
David Best
Oh no prob. I haven¡¯t touched it since I made this initial posting. I just hope my first fub up didn¡¯t destroy the control panel/power drive.
<Felder Electrical Cord Connections.pdf>
|
David P. Best