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  1. Delta vs Wye, Voltage / Frequency selection

    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...
  2. [User Manual] for AEG VFD model: Microverter D

    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
  3. Remote monitoring amp draw of a motor using VFD and PLC

    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...
  4. Motor Disconnect before VFD or between VFD and Motor?

    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...
  5. Motor Megs out Bad, Then Runs?

    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...
  6. Moving MCCs, Switchgear, UPSs, Etc.

    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...
  7. Cutler-Hammer AC Drive help!

    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...
  8. A curiosity I can't seem to find an answer for

    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...
  9. AB Power Flex Many Output Wires?

    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...
  10. interview question. Help!!!

    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=?
  11. Lenze AC Tech inquiry

    PLCs, VFDs, Motors and Controls
    Hello everyone, I'd like to know what people with experience on the matter think of the Lenze AC Tech VFDs. I live in a place where there is not much offer on these kind of devices and this brand seems to be gaining much presence in the market. Where does Lenze AC Tech stand compared to bigger...
  12. VFD to Motor Connectors

    PLCs, VFDs, Motors and Controls
    Hi there, I am running a wire from my 1HP VFD to my 1/2 HP motor. I have decided to just run 12/3 BX instead of the braided cable because there are no other sensitive loads around. It's a short run. 10ft so I am not worried about noise. But my question is, the peckerhead on the motor has a KO...
  13. VFD Wire Size Question

    NEC Code Forum
    Hi all: I just received two Yaskawa P1000 configured VFDs, with input rating of 460V, 207A, 3ph. The drives came with 400A disconnects and 500A fuses installed. My question is this, if the NEC requires conductors to be sized not less than 125% of rated input current, why does this have...
  14. Analog output as frequency reference for a second drive

    PLCs, VFDs, Motors and Controls
    Can the analog output from a Yaskawa A1000 VFD be used as input signal for a V1000 VFD? The manuals mention that only meter devices must be used.
  15. VFD Motor selection

    PLCs, VFDs, Motors and Controls
    Hello guys, I have a somewhat offbeat question: What would be the maximum power and torque output by using a 5.5 kW VFD and a 2.2 kW induction motor combination. This will be an intermittent duty system with duty cycle of from 10 to 60 minutes.
  16. DC Bus Overvoltage Problem

    PLCs, VFDs, Motors and Controls
    I have a 5.5kW motor & VFD combo. The VFD and motor can take voltages from 400 to 500V, 3-phase. My voltage is 470, 471, 472 phase to phase. Right after I apply power to the combo unit I get the DC bus overvoltage fault. I'm not able to enable the drive because it faults right away. I check...
  17. Chopper operation sound

    PLCs, VFDs, Motors and Controls
    This is my first time here, I have less experience with VFD Choppers. Do these normally make noise while in DB action ? I found a few choppers making sound while doing chopping. Why does this occur ?
  18. Load Sharing problem

    PLCs, VFDs, Motors and Controls
    Hello all, I'm a newbie in this area. I have a problem when performing load share with the VFD. Load share succeeded when the VFD frequency input to the motor is positive. Output torque on each motor is positive. When the input is negative, the load share failed because the slave motor torque...
  19. sizing service for water well

    Services and Service Equipment
    I have a 125hp 277/480 submersible pump i need to build service for.I am confused on sizing fuse size and conductors from service to vfd that will be controlling pump; 156 fla x 175 % = 273 for fuse size? what would the wire size be from service to vfd would it be rated for 300 amp 350 mcm?
  20. feeder, O/C sizing

    General Electrical Discussion
    Greetings, Question about the CEC regarding VFD's. Im doing a sand blasting project. I have the following loads .77A 120Vac single phase gear motor, controlled across the line. .7A dc motor controlled by a 120Vac KB penta DC drive 100W powersupply for PLC,PLC in/out modules, and 3 input...