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  1. Replies
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    In the serious and capable 3D CAD area, don't...

    In the serious and capable 3D CAD area, don't ignore Alibre. It has been very usable, and has gotten a lot more capable just in the last few months. Full 3D Parametric design, like the rest.
    ...
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    People always say to get a profitable businessman...

    People always say to get a profitable businessman in who knows how to run things. Wrong.

    You need to get someone in from a non-profit corp, maybe, but not a profit-making business manager. ...
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    But the plant evolved that oil to DO just exactly...

    But the plant evolved that oil to DO just exactly what it does. In other words. it GOTCHA. Nothing to do with you except that you might otherwise damage the plant. Now you stay away.

    Clever....
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    If I understand you, you have a case where there...

    If I understand you, you have a case where there is an overload, but the VD keeps trying to run the motor.

    Yes, that mode exists.... in some VFDs.

    The VFD simply limits current to a safe...
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    Point being that if all the active wires that...

    Point being that if all the active wires that pass through the toroid have net current in them in the same direction through the toroid, then the toroid will have a magnetic field induced into it,...
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    The other problem with slowing down is also due...

    The other problem with slowing down is also due to the variac.

    When you adjust the variac for the speed you want, that is with minimum current (minimum torque, no load).

    When you apply a load...
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    ALL GFCIs have sensitivity problems. Q0 are...

    ALL GFCIs have sensitivity problems. Q0 are better than Homeline, does not mean they are perfect.

    Issues with machinery and GFCIs are usually due to trying to use a type A consumer GFCI that is...
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    An excellent point. And turning slowly, airflow...

    An excellent point. And turning slowly, airflow does not help much.
  9. Replies
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    The probability is that there is a machine or a...

    The probability is that there is a machine or a load of some sort out on those circuits. If it happens, when "off", to have a different capacitance to ground on each line, there is the imbalance. ...
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    'Ceptin it is NOT next to it. I figured it was,...

    'Ceptin it is NOT next to it. I figured it was, but look at the slots he states they are in.
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    I would not describe an immune system going into...

    I would not describe an immune system going into full-on "attack yourself" mode as being "the best" operating immune system. What you are describing is "the quickest operating and maximum response"...
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    More to the point, the referenced breaker is a...

    More to the point, the referenced breaker is a class-A (home-type) GFCI.

    If being used with machines, it may not need to be that sensitive even if it is required. There are ones that are designed...
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    I was hoping "idiot" miraculously did not apply...

    I was hoping "idiot" miraculously did not apply to you.

    Looks as if I was wrong.
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    Idiot... If the immune system did not have the...

    Idiot...

    If the immune system did not have the capability to respond to virtually any threat, there would not be a "native American" (so-called) left alive. They would have ALL died. So would...
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    It seems that several things affect this. A...

    It seems that several things affect this.

    A hyper-active immune system is one thing that kills you..... look up "cytokine storm"....

    Of course your immune system can do something, the...
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    The "Homeline" breakers have already been dissed...

    The "Homeline" breakers have already been dissed somewhere back near the start of the thread, and I could not agree more with DK about them being trash.

    And disconnecting the loads on those will...
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    Installation instruction sheet: ...

    Installation instruction sheet: https://download.schneider-electric.com/files?p_enDocType=Instruction+sheet&p_File_Name=48840-058-03.pdf&p_Doc_Ref=48840-058-03

    Do we know if the other circuits...
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    Well, that lets out the induction explanation. ...

    Well, that lets out the induction explanation.

    The most probable thing than is that the sudden drop in voltage when the RPC is started is the cause. It must cause a sudden unbalanced flow of...
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    And different pressure per unit area.

    And different pressure per unit area.
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    As I said, I have seen the induction into toroids...

    As I said, I have seen the induction into toroids before. Not as hard as it might seem.

    And we are not talking about the higher current, we are talking about a fairly HUGE surge current as the...
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    The current has to exist, though, to do the...

    The current has to exist, though, to do the classic current imbalance trip. That means it has to go to something and return somehow not on the hot or neutral. The classic GFCI has the hot and...
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    Since there is no load on the other two, and no...

    Since there is no load on the other two, and no load change on them from the RPC starting in any case, it seems that they have to be opening on the GFCI function.
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    Authoritarian? We got our own ignorant dictator...

    Authoritarian? We got our own ignorant dictator in training. Our own "Dear Leader". Apparently you have not noticed.

    And he is carrying his own agenda to an extreme, with a bunch of...
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    Homeline is not the good stuff. The dual...

    Homeline is not the good stuff.

    The dual breakers pop when you frown hard at them, I do not like them.

    Then also, there is a fair chance of counterfeits. If they are not genuine, Lord only...
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    Those issues are generally NOT an issue unless...

    Those issues are generally NOT an issue unless you misapply the scope. I like analog scopes, and meters. I recognize what they are good for and what they are not good for. Both analog and...
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