Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
Looking at some lathes and mills on auction
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="SidecarFlip" data-source="post: 725559" data-attributes="member: 39764"><p>Adding to Shortgrass's post (I'm no 'lectrician by any means as a disclaimer...) but, 3 phase motors are most Wye wound. That means the T3 leg (the one you don't have with 220/1, is stackable.</p><p> </p><p>It simplest terms, size your rotary convertor (I happen to have a Gerhardt-Werner btw) for the median horsepowr requirement you have, say a lathe with a 3 horsepower motor, keep in mind the inrush amperage is 3 times running amperage, so size the convertor for 9 horsepower to be safe.</p><p> </p><p>I run the GH on the Servo-shift and the CNC machining center because I want to insure I don't smoke the electronics.</p><p> </p><p>Leg all the 3 phase motors on one circuit and start and idle a couple notors before starting the bigger ones. The T3 windings on the idling motors will exite and provide starting amperage for the big motor to start.</p><p> </p><p>If the machine is frequency drive (my LeBlond Servo Shift is), it's imprative that the T3 leg is pure sine wave 60hz power or you'll fry the frequency drive.</p><p> </p><p>Also keep in mind that 3phase motors running on artificially excited (static conversion) single phase, produce less than nameplate rated power and more residual heat.</p><p> </p><p>BTW, I wired my shop myself, 400 incoming amps and I live to tell about it.....<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p> </p><p>Never put both hands in a breaker box at one time, make sure the mains are pulled when fiddling around and be sure to discharge any capacitors (all motors of size have start capacitors that can kill you, right now and most motors don't have dropping resistors across the capacitors.</p></blockquote><p></p>
[QUOTE="SidecarFlip, post: 725559, member: 39764"] Adding to Shortgrass's post (I'm no 'lectrician by any means as a disclaimer...) but, 3 phase motors are most Wye wound. That means the T3 leg (the one you don't have with 220/1, is stackable. It simplest terms, size your rotary convertor (I happen to have a Gerhardt-Werner btw) for the median horsepowr requirement you have, say a lathe with a 3 horsepower motor, keep in mind the inrush amperage is 3 times running amperage, so size the convertor for 9 horsepower to be safe. I run the GH on the Servo-shift and the CNC machining center because I want to insure I don't smoke the electronics. Leg all the 3 phase motors on one circuit and start and idle a couple notors before starting the bigger ones. The T3 windings on the idling motors will exite and provide starting amperage for the big motor to start. If the machine is frequency drive (my LeBlond Servo Shift is), it's imprative that the T3 leg is pure sine wave 60hz power or you'll fry the frequency drive. Also keep in mind that 3phase motors running on artificially excited (static conversion) single phase, produce less than nameplate rated power and more residual heat. BTW, I wired my shop myself, 400 incoming amps and I live to tell about it.....:) Never put both hands in a breaker box at one time, make sure the mains are pulled when fiddling around and be sure to discharge any capacitors (all motors of size have start capacitors that can kill you, right now and most motors don't have dropping resistors across the capacitors. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
Looking at some lathes and mills on auction
Top