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Type: Posts; User: templdl

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  1. Replies
    10$$
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    347

    These are my thoughts also that fist come to mind.

    These are my thoughts also that fist come to mind.
  2. Replies
    12$$
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    374

    As I recall while working as a sales and engineer...

    As I recall while working as a sales and engineer for a transformer manufacture you could design said transformer as a boost but there ended up to be very little cost advantage as one would expect to...
  3. Would you agree that a neutral is a load,...

    Would you agree that a neutral is a load, current, carrying conductor where a grounding conductor is not nor intended to be. The simple idea that an EGC is capable of carryng load current is a...
  4. I believe that you will find that the device is...

    I believe that you will find that the device is UL 489 listed device. As such I must meet the testing requirements of a UL489 listed device.
  5. Replies
    12$$
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    374

    Yes, the problem is stepping up about 100v which...

    Yes, the problem is stepping up about 100v which is not practical to do with as boost transformer configuration. You may as well use a two winding isolation transformer.
  6. Replies
    6$$
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    328

    Thanks. Something that I was never aware of...

    Thanks. Something that I was never aware of especially by Ford himself.
  7. A 1200a frame with an 800a NIT unit or a...

    A 1200a frame with an 800a NIT unit or a nonadjustable trip unit? It is obvious that you can't change the rating of the other quipment. Is there an issue with feeding a 1200a rated piece of equipment...
  8. Wouldn't one consider a breaker that is...

    Wouldn't one consider a breaker that is classified as having a NIT or non interchangeable trip unit and not adjustable? As such it would require a qualified person to change the trip unit rating.
  9. I would have not problem with this product. Did...

    I would have not problem with this product. Did you not see the UL label prominetly displayed on it? NOT!!
  10. Replies
    1$$
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    224

    Use an aircore reactor.

    Use an aircore reactor.
  11. [QUOTE=Besoeker;1595501] It will be about...

    It will be about inrush when the OCPD is tripped as the transformer is energized. If so how is it addressed?
  12. [QUOTE=Besoeker;1595450]One other point that I...

    [QUOTE=Besoeker;1595450]One other point that I add, and forgive if it has already been covered.
    If the transformer is designed for 480V primary and 208V secondary on load (and most are in my...
  13. Replies
    17$$
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    432

    Is it "over current protection" or "short circuit...

    Is it "over current protection" or "short circuit protection?"
    The primary device I think would be intended to take the transformers of line should either of the transformers fail. As such the only...
  14. I've been in the industry since 1982 and worked...

    I've been in the industry since 1982 and worked for a DTDT manufacturer for 3 years. There is no derasting required in any of my application notes.
    However you will note that the OP does not include...
  15. Replies
    15$$
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    668

    Common faults are line to ground which is picked...

    Common faults are line to ground which is picked up by the 30ma gf element. The AFCI has been designed to detect undesirable in line arcing in a circuit as well as line to nuetral arcing all of which...
  16. Replies
    4$$
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    176

    Remember that the MCP is a reverse UR component...

    Remember that the MCP is a reverse UR component listed device with no "stand alone ratings." It must be used wthe a combination motor starter. MCPs start at 3a continuous, then 7a, 15, 30, 50, 70,...
  17. Replies
    14$$
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    701

    I know that the challenger business was with...

    I know that the challenger business was with Westinghouse for some time where the challenger breakers were nambranded as I recall matter of fact I think the load center was a Bryant 'BR'. Even though...
  18. Replies
    15$$
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    668

    I only wish that this happened 15 years ago while...

    I only wish that this happened 15 years ago while I was a sales and applications engineer for C-H. I knew the AFCI design engineers at that time personally and was privileged to be a BETA test sight....
  19. Replies
    35$$
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    1,365

    LRA? Plan on 7x the FLA for NEMA design B but you...

    LRA? Plan on 7x the FLA for NEMA design B but you also must consider inrush which may be 13x but that often varies because of the motor design where energy efficient motors could be quite high.
  20. Thread: 800 hp motor

    by templdl
    Replies
    4$$
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    249

    Think about it, what would the FLA be at 480v....

    Think about it, what would the FLA be at 480v. Would it be practical. Even the windings of the motor we would be impractical to wind at best because of the huge wire gauge that would be required....
  21. Replies
    17$$
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    847

    I think this is what my thoughts were, that is...

    I think this is what my thoughts were, that is the ratings of the OCPD and pphase to ground voltages. With a 3ph system where you may have 240v to neutral available since the neutral is commonly...
  22. Replies
    29$$
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    1,413

    Out may not have seen the damage that can be done...

    Out may not have seen the damage that can be done to MCCBs when the weight of the cable on the lugs is sufficient enough to break the breaker molding. Lashing cable can reduce the flexing as a...
  23. Replies
    29$$
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    1,413

    Also, one can't overlook the weight of the...

    Also, one can't overlook the weight of the conductors themselves and the stress that it often places on the terminals which may not be able to support the weight.
  24. Replies
    11$$
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    614

    Is this a question based on curiosity of a real...

    Is this a question based on curiosity of a real application?
    If it is for an actual application it would be appropriate to provide the rating of the transformer in question.
    You could be referring...
  25. Replies
    7$$
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    492

    If the OP was more specific his question could...

    If the OP was more specific his question could have been answered with one reply. But it is a lot mor fun to guess what his application.
    As I implied it is possible to specify an...
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