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  1. armandh

    Increasing speed of 50hp motor

    yes but.... besides the no free lunch calculation, is there increased friction?
  2. armandh

    Induction motor in explosive atmosphere

    as a general rule change hastens the laws of unintended consequences. I am retired now but I will relate what happened just after I sold the business [printing related] the company switched from VOC to water solvent inks and lack of maintenance on the 240V single phase ink pump motor portable...
  3. armandh

    DC Relay & inductive loads

    like any dc inductive device the kick back on circuit opening is the problem. spike over voltage.... just what movs are designed for and they wont be polarity sensitive either. cheap. give em a try
  4. armandh

    Ground or Spare Unused Conductors in a Cable

    if you are writing rules spares in sensor wiring [ground only at the receiving end] spares in a cable carrying over X volts should be grounded low voltage control [ungrounded insulated and marked spare] set your rules to the needs
  5. armandh

    Single Phase Induction Motor & tripping GFCI

    it the tripping when turning off pesky triping when turning off from counter EMF kick back can be cured or vastly reduced with a few extra MOVs
  6. armandh

    proper fusing for big motor/small motor combination

    fuse appropriately to protect any wiring lighter than the mains
  7. armandh

    Softstarter on Pump2

    last one I had like that [early 1980s]the leads to the motor were disconected at the motor but not insulated from ground. trashed a controler that looked a lot like this one.
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