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  1. fuzzydiode

    capacitors - RFI suppression

    This can be a very complex subject with that appears to have many contradictions because of the broad definition of "RFI" and many other not so obvious factors. But generally, capacitors can be viewed as the previous post explains. Their impedance is inversely proportional to the...
  2. fuzzydiode

    Use of VFD output side contacter for E-stop

    My personnel preference would be to use a single contactor upstream to supply the all inverters and simply kill the whole system in the event of emergency. Other parts do not have to continue to operate. However, I am being told that the motors may continue to move due to energy stored in DC...
  3. fuzzydiode

    Use of VFD output side contacter for E-stop

    I am looking at a system that consists of multiple VFD's each driving a single 1HP (or less) motor. I would like informed opinions regarding the need/tradeoff of providing a separate contactor in the output side for each VFD (between motor and VFD) versus a single MC on the input side...
  4. fuzzydiode

    Ruggedized 1HP VFD

    Hello, Is anyone aware of a manufacturer or line of small VFD's that would be rated to operate in more severe envirnomental conditions like temperatures down to -35C? Thanks RP
  5. fuzzydiode

    Recommendations for electric power system reference

    Hello, Any recommendations for books (practical reference) regarding electric power systems (ie distrubution, gensets, protection/codes/safety). I have been more on the secondary side of things and need to brush-up. Thanks
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