Page 6 of 6 FirstFirst ... 23456
Results 76 to 79 of 79

Thread: Phase convertors?

  1. #76
    Join Date
    Mar 2014
    Iowa USA
    Quote Originally Posted by Jerome Stanek View Post
    The old carnys used to pull start their motors with a rope I used to work for a printing company and we printed a bunch of hints and facts for doing stuff to get by.
    Yes I was holding off commenting, a 3 phase motor for a RPC can be rope started in place of a single phase pony motor. Once the 3 phase motor is started and running on single phase it generates the 3d phase itself.

    As a electrician who worked on industrial for many years and then crossed over to HVAC/R I build my own phase convertor as I had access to lots of used Run caps and start caps and used a potential or voltage relay to start the motor and then drop out the start cap. Generally speaking to make a RPC it needs to be larger than the run load motor by at least 1/3.
    Last edited by Bill George; 03-08-2022 at 2:24 PM.
    Retired Guy- Central Iowa. , Cloudray Galvo Fiber , WorkBee 1000x750 CNC Router - Mach4 - Windows 10

  2. #77
    Join Date
    Jan 2016
    Port au Port, NL, Canada
    Just like Bradley's friend, I made my own 25 years ago. Using an old 10hp 220v 750 rpm 3ph motor connected to a small add-on 3ph panel with a manual switch, starting it each morning with a pull cord. I use it every day for all my 3ph equipment with no problems at all, my Altendorf F45 saw and Maho MH600P milling machine work flawlessly.
    Although today I'd use a 15hp Lenze VFD feeding a 3ph sub panel connecting all equipment.

  3. #78
    Join Date
    May 2008
    I have currently wired my phase convertor in conduit from the PC box to a 4 pin outlet, with a cord going to the machine.

    There is a 50A socket in the wall for charging a car. There is a dryer pigtail into the PC box (I put that in at my last shop) to be able to disconnect.

    I wonder if this will pass code.... but am about to find out. Anybody want to chime in on proper code for wiring a phase convertor?

  4. #79
    Join Date
    Jul 2008
    Courtenay BC Canada
    I have a 20hp Phase perfect. I would recommend one only if you are going to run more than one machine with it.

    Mine is a PP-20. Its wired to a 100 amp 230V single phase breaker. The PP creates about 56 - 58 amps of 230V PH-3 which runs to a Siemens Load centre panel. Meaning there is no main breaker, just a panel full of breakers.

    Basically I walk in and snap the 100 amp breaker, wait 8 seconds and the contractor on the Phase Perfect "clunks ".. It makes a whistling sound and all the machines come to life.

    The 3 phases panel feeds a Table saw, Planer, Jointer, Wide Belt, Edge sander, Shaper, Mortiser and edge bander. The advantage to this system is .. For example, I just took delivery of a new shaper. Its 3 phase. I install an appropriate breaker, run a cable. ( usually Tec ) and the three phase machine is operable. The same Phase converter supplies all the machines.

    The PP will run more than one machine at a time. I assume it would likely run 3 or 4 machines, I've never tried it as I usually work alone.

    Mine is now about 14 years old. I bought it new and its been really good. The downside is that its expensive. The upside is everything else. Its one of those cry once things.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts