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Type: Posts; User: templdl

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  1. Replies
    4$$
    Views
    108

    If you exersize the breaker that resistance will...

    If you exersize the breaker that resistance will change as the breaker contacts actually rub together as the close.
    Also, why are you even trying to measure contact resistance anyway? It is not a...
  2. Replies
    14$$
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    489

    I've been in this business since 1982 and get...

    I've been in this business since 1982 and get very concerned when I'm being asked to hand someone a loaded gun. I'd rather you be mad about not receiving an answer that you wanted to hear than my...
  3. Replies
    14$$
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    489

    If we tackle this what would your exposure be...

    If we tackle this what would your exposure be regarding liability for safety? Would you be liable should an accident occur because of a control issue when altering the OEM wiring scheme?
    When one...
  4. Replies
    14$$
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    489

    I'd love to help you out but I'm not familiar...

    I'd love to help you out but I'm not familiar with the schematic symbols that you have included in your diagrams. What I was looking for was a complete control wiring diagram on on sheet of paper...
  5. Replies
    17$$
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    359

    This is imperative!!! A common spooled real of...

    This is imperative!!! A common spooled real of wire has no ability to dicipate heat and will over heat creating a hazard. My son was ASN example of that when he plugged in my heat gun without fully...
  6. You appear to be asking a leading question,...

    You appear to be asking a leading question, installing an old style product in a new panel. Is the old style breaker used or new old stock. If used I doubt very much if it has gone through factory...
  7. Has the OP considered reading the name plate on...

    Has the OP considered reading the name plate on the panel as to what breakers are allowed to be installed in the panel with out violating iyts UL listing?
  8. Replies
    14$$
    Views
    489

    This is a " wild guess" being that your...

    This is a " wild guess" being that your description is very vasgue at best and includes no wiring diagram of the control scheme that you are referring to.
    The run control buttons are commonly...
  9. Replies
    11$$
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    497

    What are the negatives of simply getting a 1ph...

    What are the negatives of simply getting a 1ph 240-120/240 panel? You have a newly derived system where you can ground the neutral of the 120/240 for the new panel.
  10. Replies
    47$$
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    1,172

    I left out that the 80degC transformer has the...

    I left out that the 80degC transformer has the ability to carry 130%? of its NP rating w/o reduction of life expectancy. These are at an anticipated 30degC ambient.
  11. Replies
    47$$
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    1,172

    Regarding the subject of transformer overload...

    Regarding the subject of transformer overload capacity, Per ANSI standards basically a distribution transformer wil deliver 200% NP load for 1/2 hr, 150% for 1hr, and 125% for 4hr w/o damage provided...
  12. What is the actual nameplate of the transformer,...

    What is the actual nameplate of the transformer, HV side and LV side, as well as any HV taps? What is the kva of the trasformer? What are the HV vconnections such as H1 and H2 and the LV connections...
  13. Replies
    47$$
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    1,172

    The point of the second post of mine was to point...

    The point of the second post of mine was to point out that it is possible to exceed to NP rating of the transformer without damaging it. Other than a violation of art 110 the more important issue...
  14. Replies
    47$$
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    1,172

    Let's start with the transformer FLA at its...

    Let's start with the transformer FLA at its nameplate rating. The transformer's ration is based upon a 40cdegC ambient plus the temperature rise of 150, 115, or 80degC+ 30deg is required for hot spot...
  15. Replies
    14$$
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    817

    Then a simple shut trip would work. The next...

    Then a simple shut trip would work. The next issue is if the panels have main breakers as they may be large enough to specify a ST as an option.
    But, I may assume that you are looking for the...
  16. Replies
    14$$
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    817

    Do they have to be turned on again remotely?

    Do they have to be turned on again remotely?
  17. Replies
    31$$
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    1,212

    Are you sure it's not a Y system where they often...

    Are you sure it's not a Y system where they often just brought out the 3 lines and EGC only? As such it may be misunderstood as being a delta because of not having a neutral. With a delta it is often...
  18. Thread: Ground Fault

    by templdl
    Replies
    4$$
    Views
    302

    Another post that asked an ambiguous question. As...

    Another post that asked an ambiguous question. As one of the previous respondents said what is the voltage? But, the OP has also no defined what his definition of GF is. As an example what is the GF...
  19. Replies
    29$$
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    934

    Also remember that a transformer is not a voltage...

    Also remember that a transformer is not a voltage regulator. The secondary voltage is dependent upon what the voltage is at the primary at any given point in time.
  20. Replies
    29$$
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    934

    Yes, you we could nbe able to come close to 400v...

    Yes, you we could nbe able to come close to 400v with a 380v secondary by using the -(2) or (4) 2-1/2% FCBN taps that are most likely available on the 480v primary which you could use to raise the...
  21. Replies
    10$$
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    652

    All said please don't overlook the application of...

    All said please don't overlook the application of NEC art. 240.6(B)Adjustable trip breakers.
  22. Thread: Main breaker

    by templdl
    Replies
    8$$
    Views
    504

    Here are my thoughts: I am understanding that...

    Here are my thoughts:
    I am understanding that your reading have been taken from the load side. If so check the voltage from the line side to the load side of each pole. You shoukd read basically...
  23. Replies
    4$$
    Views
    265

    How did you come up with 120/208 which I would...

    How did you come up with 120/208 which I would 'assume' would be be 1ph3w which would be feed from a 3ph 480d - 208y/120 step down transformer? Now this is only a guess as you weren't clear on this....
  24. Replies
    17$$
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    683

    As long as branch circuit protection is provided...

    As long as branch circuit protection is provided first then you may consider additional protection as supplimentery protection as I understand it. Look up reference to supplimentery protection in the...
  25. Replies
    7$$
    Views
    304

    Yes, machine tool transformers are designed for...

    Yes, machine tool transformers are designed for such loads as the secondary winding ratio is compensated to allow for this type of load unlike the common GP transformer. If I can recall I believe...
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