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  1. CelsoSC

    Harmonics in 250kW VFD

    Hello, Can you provide a diagram of all the equipment that is connected to the same incoming line? Is there a bank of capacitors? A resonant circuit with capacitance and inductance may generate a significant amount of circulating current near to the resonant frequency. It's usual to size a...
  2. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    The CUVC board part number is 6SE7090-0XX84-0AB0. Old Firmware was V3.23. New firmware for both CUVC boards is now V3.33. There was a hotfix in Firmware version 3.31, but I am unable to find any information about it.
  3. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Hello, Finally, I can close this topic. It turned out that it was a firmware issue on the CUVC board. The motor started and operated normally after replacing the board with a spare and uploading the parameter set. I found that the firmware versions on the old and new boards were different when...
  4. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Hello Kflan, Thank you for the detail, I overlooked it. I tested with 400V delta at 103Hz setting and it worked! Current with no load is higher at 80A to 95A. Would like to know how to set up the correct Motor magnetization current?
  5. CelsoSC

    Can VFD be set for 3 different speeds with 3 different time & load cycles in a full duty cycle?

    If multi-step speed selection on a VFD is not enough to select fixed speed settings for the motor and you need to define special conditions for each speed step, then a VFD with Parameter Sets can be used. Where each set can be configured as a different motor, up to four different sets, some...
  6. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Yesterday, before the old motor was delivered, I made a factory reset on the VFD. Connected in star a 30 kW,4 pole motor to do some tests on the VFD, and the motor worked normally. I checked all firing pulses of the IGBTs, and gate charge and discharge times were fine too. Today I hooked up the...
  7. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Hello, today I can an update that the motor was tested fine. It was tested under full load on a test stand and performed OK. Well, VFD it is. Wish me luck.
  8. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Hello edison123, Motor was taken out of the compressor and now is on his way to the workshop. Hope to have some news soon.
  9. CelsoSC

    Schneider ATS48 Soft Starter Remote Start/Stop via Modbus

    Hello Histor, Still didn't answer my questions. Can you confirm that you have successfully established a modbus connection with the ATS48? Are you receiving 16#xx21 value when reading ETA (W458) register when Starter shows "nLP"?
  10. CelsoSC

    Causes for high vibrations in all 3 axes at both bearings in 2 pole, 3000 RPM, 50 Hz motor

    Hello, Sorry for the silly question, what is Motor DE / NDE? Is it Drive End and Non Drive End ? And what hardware/software setup is used for the Motor Vibration Analysis?
  11. CelsoSC

    Schneider ATS48 Soft Starter Remote Start/Stop via Modbus

    Are you receiving/reading ETA (W458) = 16#xx21?
  12. CelsoSC

    Schneider ATS48 Soft Starter Remote Start/Stop via Modbus

    Hello Histor, Can you confirm that you have successfully established a modbus connection with the ATS48? Do you have the ATS48 Modbus Protocol manual ? https://www.se.com/us/en/download/document/VVDED302023/ Do you have created a state machine to go throw the DRIVECOM state chart like on Page 21?
  13. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    On a side note, I am an electronic engineer and am always curious. And since I fixed the VFD, I have to give some warranty. Blowing up components because of overcurrent will get very expensive on this particular VFD. I prefer to spend some time trying to understand what is happening. I'm not an...
  14. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Hello edison123, Without opening the motor is there a trick to discover the phase starts/ends of the winding? On transformes, especially encapsulated, I use a sine wave on the primary and feed the signal to one channel of an oscilloscope and check phases of the other winding with another...
  15. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Hello iop95, This VFD is used on an Atlas Copco GA180 VSD compressor, VFD and motor setting was matched at factory and no modification where made to the parameters of the VFD. P101 Mot Rtd Volts = 400 P107 Motor Rtd Freq = 76 P115 Calc MotModel = 0 P318 Boost Mode = 1 Volt...
  16. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Hello edison123, You are right, it's 2255 RPM. Nameplate is hard to read. There is no motor terminal board, 12 high flexible yellow wires are coming directly from inside of the motor. Cable marking U1 U1 U2 U2 V1 V1 V2 V2 W1 W1 W2 W2.
  17. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Hello electricpete, Uncoupled I can ramp up the motor from 0 to 3000 rpm (100Hz), with high vibrations and current spikes at about 1000 rpm (30-34Hz). On ramp-down VFD always trips over-current (310A) at 1000 rpm.
  18. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Still no luck with this motor could run it only at 10-12Hz, hitting the current limit at about 130A output of the VFD I could get. Motor is a Siemens 1LA6 316-4AA91-Z Δ400V 76Hz 181kW PF0.87 FLA 310A 2665rpm Connection of the motor on the output of the VFD is U1W2 , V1U2 and W1V2. I would...
  19. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Hello iop95, The start and stop are controlled by the Atlas Copco Elektronikon Mark IV Controller. This compressor has a Siemens 6SE7033-7EG60 VFD, and I don't know this model well. I will have to dig a little more into the manual. I used to service the Micromaster 440 models on Atlas Copco...
  20. CelsoSC

    High vibration @1000rpm of a 180kW Ac Motor

    Hello iop95, P100 is V/Hz P340 is 2,5kHz

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