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Type: Posts; User: templdl

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  1. Replies
    8$$
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    402

    I'm intrigued that the are attempts to address...

    I'm intrigued that the are attempts to address the OP question by having no knowledge of the relay being referred to. It's like shooting at shadows with no additional input from the OP.
  2. Thread: contradiction

    by templdl
    Replies
    6$$
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    459

    Precisely my point.

    Precisely my point.
  3. Thread: contradiction

    by templdl
    Replies
    6$$
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    459

    Oh well. Even if the home owner were to ID the...

    Oh well. Even if the home owner were to ID the breaker I noticed that the inductions did indicate as to how the average home owner even knows how to check to see if the a beaker is "operable" or not.
  4. Replies
    8$$
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    402

    Interesting. Wouldn't you specify if the relay...

    Interesting. Wouldn't you specify if the relay had an AC or DC coil as both coils assemblies are different. With an AC coil the coils resistasns may be one thing but with an actual AC current applied...
  5. Replies
    17$$
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    523

    Thanks, yes, buck boost, and bucking the voltage...

    Thanks, yes, buck boost, and bucking the voltage but they opted to continue replacing the motors. Instead of paying for the cost of the transformer they chose to play Russian roulette as to when the...
  6. Replies
    31$$
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    792

    I appreciate that you pointed out the field...

    I appreciate that you pointed out the field experiences that you used in energizing a transformer. I have addressed countless complaints where the installer misinterpreted the tripping of a PRI. OCPD...
  7. Replies
    17$$
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    523

    I know a place that did this inadvertently with ...

    I know a place that did this inadvertently with belt drive pizza oven. They bought used 208v units and the unknowingly applied them at 240 and wondered why then needed to replace the motor once a...
  8. Replies
    31$$
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    792

    I provided my input on a previous post based upon...

    I provided my input on a previous post based upon my experience as a breaker applications engineeo determiner as well as a DTDT csales and applications engineer for a major electrical equipment...
  9. Replies
    6$$
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    337

    I apologize as it certainly appears as my Nexus...

    I apologize as it certainly appears as my Nexus did me in again as this response is for another subject.
  10. Replies
    37$$
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    1,427

    The way that I look at it is that power in watts...

    The way that I look at it is that power in watts is the work that is Bering done. To do the same amount of work using various voltatsges the amount of current require to do that work will vary. ...
  11. Replies
    6$$
    Views
    337

    I provided my input on a previous post based upon...

    I provided my input on a previous post based upon my experience as a breaker applications engineeo determiner as well as a DTDT csales and applications engineer for a major electrical equipment...
  12. Replies
    31$$
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    792

    Basically yes. But, if the core is already...

    Basically yes. But, if the core is already magnetized and the transformer is deenergized and reenergized again it may be less. But to what degree? A good guess.
  13. Replies
    31$$
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    792

    You may have missed the point that I made in my...

    You may have missed the point that I made in my previous post.
    A common 100a breaker will have a mag trip of 10x 100 or 100a +-20%. It is common for them to be calibrated on the high side or up to...
  14. Replies
    31$$
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    792

    Inrush is dependent upon the KVA where lower KVAs...

    Inrush is dependent upon the KVA where lower KVAs will have a greater inrush, higher efficiencies will result in higher a higher inrush, a lower temperature rise will increase the inrush as well as...
  15. Replies
    23$$
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    781

    Try this link, it looks as if they stock these:...

    Try this link, it looks as if they stock these:...
  16. I will assume that it is a 480v 3ph3w delta where...

    I will assume that it is a 480v 3ph3w delta where the transformer overload protection is provided by the PRI OCPD.
    Then I would agree that the secondary instantaneous only breaker would be...
  17. You have included a lot of stuff but provided no...

    You have included a lot of stuff but provided no information about the nameplate rating of the transformer such as the primary and specifically the secondary voltage and if you the has been an...
  18. Replies
    4$$
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    363

    What raises a red big flag to me is that you even...

    What raises a red big flag to me is that you even have a 150kva Y-Y 480/277-208/120 transformer. Is this what the nameplate shows?
  19. Also, would there be a possibility that a smaller...

    Also, would there be a possibility that a smaller conduit could be used with copper conductor since the wire size would be smaller with a given ampacity?
  20. Thread: DC arcs

    by templdl
    Replies
    7$$
    Views
    394

    What is your DC source?

    What is your DC source?
  21. Comparing apples to oranges. This is the way...

    Comparing apples to oranges.
    This is the way that I have looked at it:
    I may assume that what you may be referring to as short circuit current is the "available short circuit current."
    Then the...
  22. Replies
    12$$
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    429

    There must be a reason for asking the quest of...

    There must be a reason for asking the quest of which none was given. Is this a theoretical question or can the OP give an example of an existing product?
  23. Replies
    6$$
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    341

    Ditto. A good description. This was common with...

    Ditto. A good description. This was common with the Westinghouse system. This would be similar to the need to terminate an unused 75ohm TV cable line using a 75ohm resistor to absorb the signal...
  24. Replies
    15$$
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    744

    Please site the code reference. Also, should a...

    Please site the code reference. Also, should a coordination study be done, yes it is possible to find that there may be a reduction in the available fault current. BUT, just anybody can't magically...
  25. Replies
    15$$
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    744

    You must refer to the manufacturer of the panels...

    You must refer to the manufacturer of the panels for series ratings.
    What the manufacture must do to achieve series ratings is to actually test the items is series. If not specifically listed as...
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