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  1. gornea

    Can you explain why an Edwards vacuum pump won't run on 60 Hz?

    Hi, Thanks a lot for all the tips! I experimented a little bit and finally managed to make it work with 277 V at 60 Hz. I used the neutral to phase of a 480 V line. The pump is running very smoothly and reaches an ultimate vacuum of about 15 mtorr with the motor pulling 2.4 A. The temperature...
  2. gornea

    Can you explain why an Edwards vacuum pump won't run on 60 Hz?

    Thanks a lot for so many useful answers! Yes the transformers are three-phase "600V to 208V" but the voltages are only 200V/115V (measured with a multimeter). Maybe the 600 V that's coming in is not really 600 V, that I couldn't measure. I moved a rather large setup from Switzerland to Canada, I...
  3. gornea

    Can you explain why an Edwards vacuum pump won't run on 60 Hz?

    Hi, I'm really curious to understand the following problem. I brought a vacuum pump from Switzerland to Canada. Originally the pump was obviously not designed to run in Canada. Also, the pump is pretty old but used to work flawlessly in Switzerland. I attached a picture with the few labels...

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