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  1. Replies
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    81

    Breaker size on a "general branch circuit", that...

    Breaker size on a "general branch circuit", that supplies several machines, is the size to protect the wire gauge used. it applies to most any circuit, with a few exceptions.

    Most motors are...
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    1,243

    The replacement interval on the caps is no doubt...

    The replacement interval on the caps is no doubt because they are being "worked hard".... in other words they are being hit with a lot of "ripple current",

    "Ripple current" is just the current...
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    1,634

    I already had the parts, w/o enclosure, including...

    I already had the parts, w/o enclosure, including the motor.

    Then I found a used good old RPC for cheap. Bought it, and wired it in, and it has been working ever since. I still have the parts,...
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    I've known that boat since I was little. I...

    I've known that boat since I was little.

    I used to see it regularly, steam calliope and all when it came upriver to St Paul as the Avalon. I am pretty sure the calliope was on it prior to...
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    225

    Need 30" or so straightedge

    It's now time to acquire a straightedge in the 30" area. I do not mind one that needs a toufhup, or even some more serious scraping back to good, but I am not interested in doing one from a milled...
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    Agree with 9100. The only issue with the...

    Agree with 9100.

    The only issue with the replacement rectifiers is tha they may not give the same non-linearity, and part of the scale may be "off". It is possible that if you can find some...
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    1,243

    Go for it. I do not mean to discourage you, as...

    Go for it.

    I do not mean to discourage you, as long as you work safe, as there are rather high voltages inside.

    The big problem is that there are programmed devices in the unit, and I very much...
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    1,043

    Most VFDs will convert to RPM using a factor. ...

    Most VFDs will convert to RPM using a factor. So, if you use the same drive system at all speeds (hard to do), you can get a correct reading.

    If you do not mind a bit of electronic fiddling, you...
  9. The input power factor on a VFD is lousy at low...

    The input power factor on a VFD is lousy at low load.

    As the load is increased, the power factor improves. It improves MORE if the capacitors in the VFD are relatively small, just barely enough. ...
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    I have found that trying to repair a complex...

    I have found that trying to repair a complex device that you have no service data for is usually a money and time sink that does not result in a trustworthy operating unit.

    I am not saying it...
  11. By the time you get done with all the details,...

    By the time you get done with all the details, single to 3 phase usually ends up between 2x and 2.5x the current for 3 phase. So 2.5A at 230 3 phase converts out to between 5 and say 6.5A at 230V...
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    Per test suggested in post 5, ATT is giving 2mbps...

    Per test suggested in post 5, ATT is giving 2mbps down and 1.3 mbps up.

    Yes it is slower than it has been.

    I do NOT use the ATT wireless, I have a local Cisco wireless router.
  13. Are there any more wires under the ones we see? ...

    Are there any more wires under the ones we see?

    Single voltage 230V motors are less likely to be reversible than 120/240, just because of the typical way they are set up as tp the start...
  14. You must have a small "Terry angle" or similar. ...

    You must have a small "Terry angle" or similar.

    #40 being smaller than the 10-32, it seems you will need to make a holder, or else attach a sleeve which is threaded (if the size difference is...
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    OK. The situation is that 415V and 240V are...

    OK. The situation is that 415V and 240V are essentially the same thing... in a way.

    Your 3 phase is 3 legs of 240V to neutral. The 415V is between hot legs. For single phase, the powerco just...
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    2,514

    This would be best as a new thread.. Please....

    This would be best as a new thread..

    Please. start a new thread with the question. You can copy the quote into the new thread if you wish.
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    t might if power was off at the device. If...

    t might if power was off at the device.

    If you just hit the breaker while power switch is still on, and it resets, starting the motor, then yeah, that suggests no ground fault.

    As for...
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    Yes, my reference to "low" is due to there being...

    Yes, my reference to "low" is due to there being designs that will draw more. A lot of motors are made in the 5 to 6x FLA range. But there are some that are considerably higher. Point being that...
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    As far as GD&T, I have found it hard to do...

    As far as GD&T, I have found it hard to do sometimes, and also I have found that if you do it as correctly as you can, you find that others either do not, or that they have "their own version of...
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    I have always done without the grid. If the...

    I have always done without the grid. If the grid is small enough to be of use for a dimension, then it is hard to use, it is too fine, and requires a lot of zooming in and out.. So I just do...
  21. Replies
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    Both the trasformer AND the solid state soft...

    Both the trasformer AND the solid state soft starters I referenced were for single phase motors, 3 and 5 HP air conditioning pumps. They worked fine, and the transformer type really did a good job...
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    Have done this for A/C compressors. ...

    Have done this for A/C compressors. Autotransformer voltage reduction. That DOES reduce current two ways. It lowers the voltage, AND it reduces the line current by the autotransformer turns...
  23. Well, you have a process, but I am surprised,...

    Well, you have a process, but I am surprised, almost shocked that the purple cleaner did not touch it. Some special oil?

    That stuff always cleans things for me. But it is not a "wipe-on/wipe...
  24. Thread: Bernard Pliers

    by JST
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    it is pretty ancient... Since then I recalled...

    it is pretty ancient...

    Since then I recalled that the real fisherman's poiers had some extra grooves and recesses in the jaws to hold the hook shank, crimp on split lead sinkers, etc. Not all...
  25. Normally, the motor, if switch is set to reverse...

    Normally, the motor, if switch is set to reverse position when running, wiould not do anything different, because the start winding is not connected. Shorting the centrifugal switch, and connecting...
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