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  1. General Electrical Discussion
    VFD means variable frequency drive. VFD is used with an induction motor for speed control, process optimization, and energy saving. Before understanding the reason why V/f ratio is kept constant in vfd, we first understand the working of the induction motor. V/f control is also called V/Hz...
  2. PLCs, VFDs, Motors and Controls
    I am NOT good at VFD's. I have four (4) Siemens MicroMaster 440 VFD's in some airport hanger doors. They ALL are tripping on error code F0002 upon start-up (attempting to move the door either direction). The VFD locks out. We reset it 3 or 4 times. Then finally, upon another try, the VFD...
  3. Looking To Hire
    PLEASE APPLY HERE: Indeed Job Posting Or Linkedin Job Posting LEL Critical, a division of LEL International, is looking for an experienced Industrial Controls Electrician at our newly renovated (climate controlled) Spartanburg, SC facility. We are a small, fast-growing company that can offer...
  4. PLCs, VFDs, Motors and Controls
    This is a strange one... I have an 480VAC Eaton SVX VFD on a screw compressor motor. It has been seemingly showing very high amps while running and so I put a clamp on meter and it's actually only pulling 1/3 of what is showing as motor current on the VFD keypad. The kW reading on the keypad...
    vfd
  5. PLCs, VFDs, Motors and Controls
    Hey I got a costumer that had us replace a vfd, I guess he had some shitty weird brand vfd and it was working for years until one day it just stopped. So he bypassed it until he ended up buying a used powerflex 523 and I set it up and wired it up and it never gets up to 60hz. It gets up to...
  6. PLCs, VFDs, Motors and Controls
    Hey guys. I work at Campbell Soup as a maintenance technician. Today, one of the flume pumps was intermittent. It would cut off at random times but start back up on it’s own. We never did pinpoint the cause of it. But, we looked at the drive parameters and the HP was set to 5. The motor HP...
  7. PLCs, VFDs, Motors and Controls
    I have worked with people on installing and setting up VFDs, and I have had multiple people say "never run a VFD without a load connected to it or you will fry it". I had no reason to doubt them so that's what I went with, until now. I tried googling it to see why exactly it is bad, but I...
  8. Industrial Electrical Forum
    Ok so a building in the company im working for wants to use a new machine from out of the country. I'm in US. So We have 240v single phase there and the machine is 3.6kva, 220v, three phase, at 50Hz. So I was thinking of running wires from our neighboring building underground that has 3 phase...
  9. General Electrical Discussion
    Is it possible to run a 1 PH motor with a 3 PH Output VDF (1 PH Input)? I salvage motors and usually they are 1 PH, so speed control is a problem. If I take out the start capacitor and centrifugal switch, can I hook up a VFD? Or other possibilities I haven't mentioned? Thanks
  10. PLCs, VFDs, Motors and Controls
    I have the following equipment: HPS 20kVA drive isolation transformer with 600V YNd1 (-30°) secondary (TE3A0020BPM) Eaton PowerXL DG1 enclosed drive, 600V input, (DG1-35022FB-C21C) Weg W22 15kW motor The available connection voltages on the motor nameplate are as follows: 380 Δ / 660 Y...
  11. PLCs, VFDs, Motors and Controls
    Dear All, Could you please help me to locate the installation and user manual for VFD by AEG model Microveter D. Thanks a lot for the help Best Regards Razi
  12. PLCs, VFDs, Motors and Controls
    I work in a cannabis processing facility and want to be able to monitor amp draw on A/C motors on our primary packaging line. The motors are controlled by PowerFlex VFD's and Allen-Bradley PLC's. Is there an easy way to output the amp draw that the VFD reads from the motors to the PLC's so I...
  13. PLCs, VFDs, Motors and Controls
    Hi everyone, Just stumbled upon this forum today and it looks amazing. I have a question for a project that I'm on. There's currently a system with a VFD and a Motor but the client wants to isolate the Motor from the VFD for when maintenance personnel want to work on the motor and safely lock...
  14. PLCs, VFDs, Motors and Controls
    Operator calls and is unable to start his machine. Found: ABB Drive faulted with "Earth Leakage" Displayed. Motor was 100 HP, Jacket cooled. With Fluke 87 III Multi-meter I found a Slight reading to ground on one of the phases. (measured on Load side of VFD, Still connected) I disconnected the...
  15. Industrial Electrical Forum
    I work for a company installing MCCs, Switchgear, UPSs, and other electrical components into skids. These things are really heavy and there is no supports from above to use a chain pull. Is there an easier way to set these things than with prybars crowbars, and sledgehammers? I was thinking of...
  16. PLCs, VFDs, Motors and Controls
    Hi, I am an electrical engineer working on a current project with an older Cutler-Hammer AC Drive (Model Number: AFM1220B Serial Number: 22164K7). However, I have been struggling to find the wiring diagram online. Any chance that anybody can provide me with the wiring diagram or PDF for this...
  17. PLCs, VFDs, Motors and Controls
    So I under stand what a VFD is capable of, and I am aware of how it does most of what it does, but something that has bothered my for some time now is that I can't seem to understand HOW some of them can create a 3 phase load off of a single or "2 phase" line, can anyone give me an explanation...
  18. PLCs, VFDs, Motors and Controls
    I took a test for a plant electrician at an automated fruit packing plant. For the practical section I was supposed to connect a VFD to a motor. I can't recall if it was single or 3-phase. There were about 6 wires between the VFD and the motor where I was expecting 3 at most. I think the VFD was...
  19. PLCs, VFDs, Motors and Controls
    Hi everyone. I've got a question from an employer. Please give me some explaination. Thanks in advance. A motor 50kw controlled by v/f method. now F=50hz. If f=40hz. P=?
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