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  1. Replies
    17$$
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    489

    But the tiles are a ghastly colour! :p

    But the tiles are a ghastly colour!
    :p
  2. Replies
    20$$
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    431

    Puting the taps on the HV side, whether it's...

    Puting the taps on the HV side, whether it's primary or secondary, means they have to deal with lower current and can be rated accordingly.
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    34$$
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    506

    I don't know what Code G means but my calcs give...

    I don't know what Code G means but my calcs give about 1420A for the locked rotor current for a typical cage induction motor assuming 6xFLC. It could be more........but not likely to be much less.
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    10$$
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    361

    It's 20%.

    It's 20%.
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    8$$
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    224

    Welcome! Well, I'm from across the pond so it...

    Welcome!
    Well, I'm from across the pond so it may mean something different where you are at but I'm some of the excellent people on this forum can confirm or otherwise.
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    8$$
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    224

    Short circuit current rating.

    Short circuit current rating.
  7. Replies
    10$$
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    361

    I'm with you on that. The concern would be not...

    I'm with you on that.
    The concern would be not pulling in.
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    46$$
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    2,165

    I wouldn't demote him to that.

    I wouldn't demote him to that.
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    48$$
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    778

    Can't open it in Excel.............

    Can't open it in Excel.............
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    29$$
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    978

    Who do you think meant that and why?

    Who do you think meant that and why?
  11. Replies
    29$$
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    978

    I like your dry sense of humour...........

    I like your dry sense of humour...........
  12. Replies
    14$$
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    785

    Yes, I'm sure you're right. It isn't just across...

    Yes, I'm sure you're right. It isn't just across an ocean. The physical one that is.
  13. Or a promotional sales line.

    Or a promotional sales line.
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    29$$
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    978

    Indeed. Had it been, the resulting influx should...

    Indeed.
    Had it been, the resulting influx should not have been possible.
  15. Replies
    14$$
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    785

    No!!! I'm not from across the pond. YOU are!!...

    No!!! I'm not from across the pond. YOU are!!
    :p

    Male?
    I'll leave to my wife to vouch for that.

    But, slightly more seriously, you do have a valid point. Any sort of junk can be claimed on...
  16. Replies
    14$$
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    785

    Does photoshopped come to mind?

    Does photoshopped come to mind?
  17. Yes, that was also used in pumping stations....

    Yes, that was also used in pumping stations. Rotork Valves.
    It's an inefficient means of control with the pressure losses across the valve.
    That was one of the reasons to introduce VFDs - much...
  18. Yes. Constant pressure controllers. Constant...

    Yes. Constant pressure controllers. Constant pressure control scheme. But Constant pressure VFD???

    It's a system. The VFD is part of that system.

    You pose the question:
    "Can you use some other...
  19. They'd want them for the price of a piece of...

    They'd want them for the price of a piece of toast.
  20. Sorry to disagree, but yes you can. And we have....

    Sorry to disagree, but yes you can.
    And we have.

    My basic equations for step up choppers:

    11746

    We have used these on VSDs up to several MW.

    Specials of course.
  21. I wondered about that too. Not only that, it's...

    I wondered about that too. Not only that, it's VFD input current that's given. The rated output current is usually significantly higher than that. So more than twice the motor rating.
  22. Replies
    8$$
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    270

    At 208V and 216A you have about 78kVA.

    At 208V and 216A you have about 78kVA.
  23. Thank you Mr Digger. You made the point more...

    Thank you Mr Digger.
    You made the point more eloquently and succinctly than I.
  24. Well, we've been supplying VSD pump systems into...

    Well, we've been supplying VSD pump systems into the water industry for quite a few years. Most of these have been for water companies/authorities supplying potable water. Pumps in pumping stations...
  25. So, as I said, external to the actual drive. I...

    So, as I said, external to the actual drive.
    I think calling it a "Constant Pressure VFD" is a bit of misleading sales speak.
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