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  1. B

    Speed change

    I am using Allen Bradley Powerflex 525 VFD's. What are your thought about maybe a harmonics problem?
  2. B

    Speed change

    Thanks to all who have answered. The vfd's overspeed but not by much.
  3. B

    Speed change

    There are 12 conveyors all running on vfd's. Turn six off and the other six increase in speed and yet the vfd setting has not changed. Why?

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