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    What I was trying to point out is that with NEMA...

    What I was trying to point out is that with NEMA motor starters, they are simple to choose and apply and they work. They will take a lot of abuse and keep on trucking.

    Not so with IEC starters.
    ...
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    If you don't like it you don't have to read it. ...

    If you don't like it you don't have to read it. Time has a way of smoothing all bumps in the road.

    Tom
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    Just to spread a little sunshine on the...

    Just to spread a little sunshine on the differences between mechanical and solid state switches.

    For years in the USA the industrial standard for starters and contactors was NEMA. I don't have...
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    Could you post sketch of your circuit? Tom

    Could you post sketch of your circuit?

    Tom
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    Many years ago I looked at vacuum contactors for...

    Many years ago I looked at vacuum contactors for use as a size 5 starter. For motor applications they have many disadvantages. Current chopping, short mechanical life, expensive, maintenance,...
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    If the need for interlocking is to prevent a...

    If the need for interlocking is to prevent a short circuit as in reversing starters, and if that is what failed, then replace the failed unit with a like unit. Forget the SSR as the contactor is...
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    Your welcome. Tom

    Your welcome.

    Tom
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    Is this with one set of windings or a full set or...

    Is this with one set of windings or a full set or what?

    Tom
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    TravisR100 is the test you just posted one or a...

    TravisR100 is the test you just posted one or a full set of windings? Any other modifications?

    Tom
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    ripperj ^^^^You know that from experience? One...

    ripperj
    ^^^^You know that from experience? One set of windings will provide the needed magnetizing force. The machine will not have as much power but it should run fine on light loads.

    Tom
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    One test is worth a 1000 opinions. Tom

    One test is worth a 1000 opinions.

    Tom
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    Just touching all bases. Running the two...

    Just touching all bases. Running the two individual sets of winding is interesting.

    Tom
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    JST please read and comment.

    Is it possible that you have connected one of the phase windings backward so that the flux from it bucks the forward flux?

    For low voltage, one set of windings has the wye connection permanently...
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    At $750 or so its cheaper just to take it to a...

    At $750 or so its cheaper just to take it to a motor shop and let them test it.

    Tom
  15. This is not about a scrap yard, but HGR has...

    This is not about a scrap yard, but HGR has inventory at good prices. Nice thing is that what they have is in reasonable good condition.

    Tom
  16. Since there is nothing to heat the drawbar...

    Since there is nothing to heat the drawbar itself, the heating must be coming from something else. Its inside a hollow spindle that has bearings attached. When you checked the drawbar did you check...
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    When you get down to the milliohm range,...

    When you get down to the milliohm range, measurement technique becomes very important. I ran into that when measuring OL relay heaters. I suspect a shorted turn would be found much more reliably by...
  18. I would go with Newall, I have one on my lathe. ...

    I would go with Newall, I have one on my lathe. They are immune to contamination and are great for cross slides where you need the extra precision.

    Tom
  19. I'd say the price is good to excellent. However,...

    I'd say the price is good to excellent. However, a turret lathe is a special lathe used to make lots of the same thing over and over. Not a good general purpose lathe. Not sure if you can thread...
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    What caused the bright flash and expensive smoke?...

    What caused the bright flash and expensive smoke? What is your system voltage? What is the interlocking for, if it is to disconnect the power system from the RPC, then be aware that SSRs are not...
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    The odds of finding a problem the way you are...

    The odds of finding a problem the way you are approaching the motor is small. As far as windings are concerned, about the only ways I know of to test them is hipot to ground and to each other and...
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    Jancollc,+5! Tom

    Jancollc,+5!

    Tom
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    Love your punctuation.....not! Tom

    Love your punctuation.....not!

    Tom
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    Nitrogen has been discussed in the past here,...

    Nitrogen has been discussed in the past here, with cautions about undesirable reactions to the nitrogen. Another problem is that unless you have a vacuum furnace, the refractory is saturated with...
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    Most mold shops I am familiar with send their...

    Most mold shops I am familiar with send their molds out for polishing.

    Tom
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