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Forum: Transformers, Phase Converters and VFD

Machine voltage issues, three phase via single phase power, and variable frequency drives discussion

  2. Help, What is this? Phase generator?

    Started by EarlF, 11-07-2019 02:57 PM
    3phase, generator, phase, run, single 8 Attachment(s)
    • Replies: 15
    • Views: 1,104
    DaveKamp
    11-17-2019, 10:45 PM Go to last post

  3. Mill Motor Runs on Line Power 3P/240VAC But Not on VFD - Why???

    Started by everettengr, 10-17-2019 02:34 PM
    3 Pages •
    1 2 3
    line, motor, power, runs, vfd 5 Attachment(s)
    • Replies: 57
    • Views: 3,829
    Hopefuldave
    11-16-2019, 06:08 AM Go to last post

  4. Found a lathe with a bum motor - motor replacement viability?

    Started by Pyrex, 10-29-2019 10:06 AM
    2 Pages •
    1 2
    found, lathe, motor, plant, power 5 Attachment(s)
    • Replies: 35
    • Views: 2,389
    dalmatiangirl61
    11-15-2019, 08:07 PM Go to last post

  5. Overload Sizing and FLA when using RPC

    Started by *D'B=6bk, 10-17-2019 02:33 PM
    2 Pages •
    1 2
    fitch, lathe, motor, overload, rcp 4 Attachment(s)
    • Replies: 25
    • Views: 1,782
    *D'B=6bk
    11-14-2019, 09:29 PM Go to last post

  6. Motor Contactor for Rotary Convertor/5 HP lathe

    Started by rhoward, 03-13-2016 01:38 AM
    contactor, lathe, motor, overload, phase 6 Attachment(s)
    • Replies: 13
    • Views: 3,907
    DDRUBY
    11-13-2019, 07:57 PM Go to last post

  7. harig 612 surface grinder vfd recomendation?

    Started by reddogforge, 11-08-2019 10:58 PM
    consideration, harig, machine, motor, vfd
    • Replies: 2
    • Views: 395
    reddogforge
    11-13-2019, 07:48 PM Go to last post

  8. Are VFD's bad for motors?

    Started by DennisCA, 11-05-2019 02:48 AM
    3 Pages •
    1 2 3
    motor, motors, run, vfd, vfds 1 Attachment(s)
    • Replies: 45
    • Views: 2,794
    JST
    11-12-2019, 12:42 AM Go to last post

  9. 460v 3phase for a VMC with 240v 1ph?

    Started by Agfrvf, 10-17-2019 01:15 PM
    20hp, 240v, 460v, motor, vmc
    • Replies: 12
    • Views: 1,192
    Agfrvf
    11-10-2019, 07:59 PM Go to last post

  10. 240 vac 3 phase bull dog box no power between the a and b phase.

    Started by toolfood, 11-08-2019 04:22 PM
    240vac, box, changed, phase, phases
    • Replies: 5
    • Views: 606
    thermite
    11-09-2019, 08:13 PM Go to last post

  12. 3 Phase Service Choice?

    Started by silencerman, 11-07-2019 03:31 PM
    delta, leg, service, shop, transformer
    • Replies: 3
    • Views: 573
    PTSCummins
    11-08-2019, 01:17 AM Go to last post

  13. Breaker/wire size for hard starting 3 phase motors

    Started by Fish On, 11-07-2019 02:06 PM
    amp, motor, phase, starting, wire
    • Replies: 5
    • Views: 430
    Fish On
    11-07-2019, 03:55 PM Go to last post

  14. Pro VFD guys, lets figure out this Yaskawa 626VM3

    Started by huleo, 12-28-2018 02:37 AM
    charge, drive, immediately, power, powered
    • Replies: 5
    • Views: 1,151
    harishmech10
    11-07-2019, 11:54 AM Go to last post

  15. RPC safe/acceptable imbalances?

    Started by rpseguin, 11-04-2019 02:57 PM
    leg, voltage, side, high, rpc
    • Replies: 4
    • Views: 558
    thermite
    11-07-2019, 05:04 AM Go to last post

  16. On dressing contacts

    Started by 9100, 11-04-2019 08:41 PM
    contactor, contacts, filed, left, making
    • Replies: 18
    • Views: 1,038
    thermite
    11-06-2019, 08:58 PM Go to last post

  17. Replacing the FWD/REV switch in my 1988 Hafco lathe: Wiring ..... HELP!

    Started by OzzyGreg, 11-04-2019 01:28 AM
    diagrams, fwd/rev, lathe, switch, wiring 12 Attachment(s)
    • Replies: 6
    • Views: 535
    PTSCummins
    11-05-2019, 11:35 PM Go to last post

  18. Adding VFD to Webb/Whacheon/Mori Seiki?

    Started by rpseguin, 11-04-2019 02:43 PM
    vfd, spindle, adding, motor, webb/whacheon/mori
    • Replies: 5
    • Views: 464
    mksj
    11-04-2019, 07:58 PM Go to last post

  19. Likely component fault on Powerflex 4 VFD?

    Started by gadget73, 04-20-2017 09:48 AM
    fault, fix, powerflex, time, vfd
    • Replies: 11
    • Views: 13,731
    Jraef
    11-04-2019, 06:50 PM Go to last post

  22. Grounding of a single phase dry transformer used in reverse

    Started by tomjelly, 10-29-2019 12:21 PM
    ground, jumper, single, supply, transformer 3 Attachment(s)
    • Replies: 18
    • Views: 1,307
    JST
    11-03-2019, 11:36 PM Go to last post

  23. RPC Wiring question

    Started by alienturtle, 05-15-2019 01:02 PM
    ground, line, neutral, phase, rpc 1 Attachment(s)
    • Replies: 6
    • Views: 1,056
    JST
    11-02-2019, 02:43 PM Go to last post

  24. VFD wired to mill circuitry

    Started by hahnpv, 11-01-2019 05:18 PM
    mill, reason, separate, starter, vfd
    • Replies: 3
    • Views: 496
    mksj
    11-01-2019, 08:04 PM Go to last post

  25. Rotary Phase Converter Questions

    Started by Kevin T, 09-20-2019 07:00 PM
    2 Pages •
    1 2
    american, lathe, phase, power, rpc 7 Attachment(s)
    • Replies: 32
    • Views: 1,962
    jim rozen
    11-01-2019, 04:26 PM Go to last post

  26. VFD vs RPC for compressor

    Started by PTSCummins, 10-28-2019 10:47 AM
    compressor, phase, rpc, shop, vfd 1 Attachment(s)
    • Replies: 13
    • Views: 956
    PTSCummins
    10-31-2019, 09:15 PM Go to last post

  27. CNC grade converter

    Started by Bob-J-H, 10-28-2019 05:54 PM
    cnc, compared, converter, grade, regular
    • Replies: 5
    • Views: 684
    Gundraw
    10-31-2019, 06:39 PM Go to last post

  28. Is an inverter duty electric motor suitable for a rotary phase converter?

    Started by Goerger, 10-30-2019 10:11 AM
    duty, good, inverter, motor, phase
    • Replies: 12
    • Views: 790
    thermite
    10-31-2019, 10:16 AM Go to last post

  29. Unknown 3PH converter panel, please help, newbie setup

    Started by tkunz, 10-16-2019 12:30 PM
    3ph, motor, panel, picture, terminals 2 Attachment(s)
    • Replies: 6
    • Views: 790
    tkunz
    10-29-2019, 01:54 PM Go to last post

  31. Phaseconverterusa.com

    Started by Dpelkowski, 10-22-2019 09:30 PM
    message, order, response, update, yesterday
    • Replies: 5
    • Views: 843
    Joe Miranda
    10-29-2019, 11:07 AM Go to last post

  32. very old motor wiring

    Started by jordanirvin, 10-27-2019 02:53 PM
    motor, repulsion, single phase, wire diagram, wiring 6 Attachment(s)
    • Replies: 5
    • Views: 554
    jim rozen
    10-29-2019, 08:16 AM Go to last post

  33. Run caps as starting caps for rotary phase converter ???

    Started by Lock 45, 10-27-2019 03:18 PM
    2 Pages •
    1 2
    bank, caps, phase, run, wire
    • Replies: 20
    • Views: 1,118
    thermite
    10-29-2019, 05:09 AM Go to last post

  34. VFD teco 7300 blown capacitor

    Started by Roscoepcoltrane, 10-24-2019 04:25 PM
    blown, capacitor, ground, terminals, vfd
    • Replies: 7
    • Views: 1,142
    mmurray70
    10-28-2019, 05:50 PM Go to last post

  35. Where to Source RPC Idler Motor

    Started by Grenade, 10-27-2019 12:10 AM
    deal, idler, motor, motors, rpc
    • Replies: 9
    • Views: 856
    thermite
    10-28-2019, 01:27 AM Go to last post

  36. Larger CNC lathe on phase converter?

    Started by mmurray70, 10-27-2019 04:15 PM
    larger, lathe, machine, phase, setup
    • Replies: 2
    • Views: 412
    mmurray70
    10-27-2019, 07:28 PM Go to last post

  37. Run a welder off a Phase Perfect Converter?

    Started by baran3, 10-05-2019 07:22 PM
    converter, perfect, phase, unit, welder
    • Replies: 12
    • Views: 1,663
    thermite
    10-27-2019, 09:30 AM Go to last post

  38. VFD as a 3 phase source

    Started by Larry on Lake Superior, 10-22-2019 11:09 PM
    catalog, lathe, motor, speed, stock
    • Replies: 11
    • Views: 904
    thermite
    10-24-2019, 04:48 PM Go to last post

  39. Mechanical ways to do a T branch circuit?

    Started by rons, 10-18-2019 04:33 PM
    2 Pages •
    1 2
    box, branch, screw, twist, ways 2 Attachment(s)
    • Replies: 35
    • Views: 2,240
    jim rozen
    10-23-2019, 02:18 PM Go to last post

  40. Question on VFD vs RPC

    Started by rbahr, 10-13-2019 01:00 AM
    5hp, motor, rpc, start, vfd
    • Replies: 12
    • Views: 1,228
    rons
    10-22-2019, 09:48 PM Go to last post

  41. VFD Bus capacitor reforming Docs

    Started by mike_kilroy, 01-09-2017 02:46 PM
    couple, docs, share, thought, vfds
    • Replies: 6
    • Views: 2,295
    rons
    10-21-2019, 11:43 AM Go to last post

  42. Help with Wiring Rotary Phase Converter

    Started by Cephalon, 10-11-2019 04:46 PM
    black, blue, motor, note, wires 1 Attachment(s)
    • Replies: 5
    • Views: 803
    PocoLoco
    10-20-2019, 01:20 AM Go to last post

  43. how can I tell the design voltage of an unlabeled 3 phase motor?

    Started by tomjelly, 09-20-2019 05:16 PM
    2 Pages •
    1 2
    machinery, motor, phase, starter, transformer
    • Replies: 20
    • Views: 2,071
    Strostkovy
    10-20-2019, 01:02 AM Go to last post

  44. Isolation Transformer Wiring Help Needed

    Started by Machinery_E, 10-17-2019 11:49 PM
    input, isolation, power, transformer, wiring 4 Attachment(s)
    • Replies: 3
    • Views: 528
    rpseguin
    10-19-2019, 12:04 AM Go to last post

  45. Wiring home shop for 3-phase power. Would love all the input I could get

    Started by DIYShopTools, 10-12-2019 01:04 AM
    2 Pages •
    1 2
    240v, 3-phase, lathe, power, shop 5 Attachment(s)
    • Replies: 25
    • Views: 2,611
    MushCreek
    10-18-2019, 04:43 AM Go to last post

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