Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. MacRae

    low revving generator for water wheel

    Check this place out. These guys brew their own power heads for renewable energy. Water wheel, windmill, etc. Suffice to say, a lot of low RPM stuff. Look through the posts. They are a very knowledgable bunch. http://www.fieldlines.com Ian Ian Rines Harris Corporation Palm Bay,FL
  2. MacRae

    Do Power Strips violate the NEC?

    mmdgatech, Your concern is well founded. Per the letter of the NEC these are considered temporary power taps. Thus, they are not allowed for a permanent intallation. Ian Rines Harris Corporation Palm Bay,FL
  3. MacRae

    wall outlet shapes

    I found some more info turns out it was used in quite a few countries in Europe at one time. Here is a quote from my friend Paul on another discussion forum that I visit often: "Thanks C-H. I hadn't realized that 127/220V 3phase was also used in Sweden, although I know it was...
  4. MacRae

    wall outlet shapes

    I can't remember exactly where offhand, I seem to recall the Belgium/Luxembourg area. Ian Rines Harris Corporation Palm Bay,FL
  5. MacRae

    wall outlet shapes

    "This sytem is being phased out, in favor of the standard 220/380 volt (technically 230/400V now) system with 220V hot to neutral." Sorry I meant to end that .....with 220V grounded neutral. Ian Rines Harris Corporation Palm Bay,FL
  6. MacRae

    wall outlet shapes

    "Quote: In Europe, both holes are equally dangerous. Really? Why? Most of Europe runs a phase/neutral/earth system to domestic and light commercial premises. The phase conductor is clearly dangerous, but the neutral is solidly bonded to earth either at the substation or service entrance (or...
  7. MacRae

    120/277 volt light fixture

    Submarines use 120V ungrounded delta. They do this for battle field relability. In case there is a single phase ground fault during an operation (ie battle)the system can still operate, just as a corner grounded delta. Ian Rines Harris Corporation Palm Bay,FL
  8. MacRae

    generator load

    " - thought all diesels were four stroke" Actually I think that the very ubiqutous GMC -71 series engines are 2 stroke. There are many 2 stroke diesels out there. They are not common in newer installations because, compared to modern 4 strokes, they burn very dirty. Ian Rines Harris...
  9. MacRae

    Under-Voltage Motor Operation

    I know that Beggar is not asking for solutions yet, as there may not be a problem from the voltage sag, but I had a thought. If the motors do end up having problems, could running them on a VFD help? I know that certain VFDs have allowable voltage input ranges that are different from thier...
  10. MacRae

    Does anybody have any input on Conditioning of klystrons?

    While I am not making a specific brand recomendation, try looking for a company called Keltec a division of Crane Aerospace in Ft Walton Beach FL. They supply us with some klystron HPAs that have to be exercised monthly. They have supplied us with documentation on how this is to be performed, so...
  11. MacRae

    AC vs DC Breakers

    Further explanation concerning AC being easier to interuupt than DC. DC switches and breakers must pull the contacts further apart when breaking the circuit. This is because DC does not pass through zero, full current will be flowing at any instantainious moment. Due to basic inductive...
  12. MacRae

    Getting our first generator

    Echo on the Liebert UPS systems. We have had good luck with them. We have a system at work that does not take lightly to any power interruptions at all. We are running a 100KVA Liebert UPS with a 300KVA CAT diesel genset. The generator does pick up the load fairly quickly, ie 30-45 sec. As for...
  13. MacRae

    Getting our first generator

    Quote: I call this the "water-heater-that-puts-out-waste-electricity". -LMAO I have never seen it put that way before. But, what a great analogy!;) Ian Rines Palm Bay Florida
  14. MacRae

    layman's question about power generation

    and another: http://users.pandora.be/worldstandards/electricity.htm
  15. MacRae

    layman's question about power generation

    Here is another source for this info: http://www.epanorama.net/links/wire_mains.html
  16. MacRae

    Touch lamp turning on by itself at night???

    These lamps typically use a floating gate FET circuit. Very high impedance input and extremely sensitive to electrostatic fields and RFI
  17. MacRae

    AC/AC Converter Design

    If you are going to hack it, do a web search on surplus units. There are many surplus traders dealing with them and the prices can be very reasonable.
  18. MacRae

    Diesel vs Gas Engines

    If I remember right the Olds diesel is NA
  19. MacRae

    Diesel vs Gas Engines

    I figured that too, but I just felt I'd mention it. ;)
  20. MacRae

    Selection of carburettor

    in the auto motive world I've been taught: (disp cu.in.)X (max rpm)/(3456) X (volumetric efficiency assume, about 80%)=(carb size in CFM)

Part and Inventory Search

Back
Top