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 cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by DanEE

  1. DanEE

    What makes an inline 6 engine more reliable than a V6 or V8 configuration?

    Thumbs up to MCM and TurboYoda.. One test of the strength of original designs especially the bottom end, block rigidity, choice of internals e.g forged crank, beefy rods, closed deck for which the 2JZ is a legend and also the Barra (after beefing up the valve train and head bolts) is the degree...
  2. DanEE

    Isoloated scope probes

    Gunnar, I haven't gotten around to buying one as yet, although I keep promising myself that I'll get around to it. Unfortunately I was bought up in the time where we cut off the earth pin, placed the oscilloscope onto a plastic milk crate and then were very careful about how we changed the...
  3. DanEE

    Automatic transfer to generator switch

    Best answered by narrowing down to specific make/model/application given the wide range of transfer switches available to meet specific needs with many being programmable for coordination with the overall power back up system design...
  4. DanEE

    Discussion on distortion PF correction.

    No first hand experience with this technology for PF correction, but this company and the owner is out of Pittsboro, North Carolina, USA just down to road from me. Looks interesting. https://3dfs.com/innovation It uses high speed DSP technology to analyze distortion in the power waveform and...
  5. DanEE

    Home UPS/Inverter calculation question

    Itsmoked, Regarding conversion methodology, ferro-resonant based UPS systems are a somewhat unique UPS design.. When it is online, it operates pretty much as a normal transformer, but with the addition of two additional windings (actually has more for powering control/electronics) on the...
  6. DanEE

    Home UPS/Inverter calculation question

    I've been running at home for years a slightly smaller unit than your requirement, a BEST FERRUPS 1.4kVA/1.0kW unit, factory configured for external batteries, 15amp internal charger option and cord and plug connection. This unit is spec'd to handle a 150% surge (no duration given) and 125% for...
  7. DanEE

    Not a Disaster (yet?...) , but interesting

    I've posted the two links below from the NC DOT traffic cams with the thought that many of you might enjoy watching this bridge being built. http://tims.ncdot.gov/tims/cameras/viewimage.ashx?id=BonnerBridgeSouth.jpg https://tims.ncdot.gov/tims/cameras/viewimage.ashx?id=BonnerBridgeHighRise.jpg...
  8. DanEE

    UPS - input rating vs output load

    Did the UPS installation documentation provided by the manufacturer not address this? My experience with fixed UPS installations and electrical code requirements are that the manufacturers installation documentation addresses requirements that may be unique to the design of a particular...
  9. DanEE

    High voltage equipment in battery-powerd cars

    Training material on alternative energy/hybrid vehicles has been made available to emergency responders for some time by many vehicle manufacturers. For example, here are NFPA's links to available Toyota documentation for first responders, made available pretty much from the beginning of...
  10. DanEE

    Generator operating frequencies.

    davebeach quiteThe phase angle variation produces a quasi-stable situation. The angle variations need to be accounted for but units with differing angles can all be treated as having the same frequency. As long as nothing goes unstable the frequency of the various units keep together even while...
  11. DanEE

    Generator operating frequencies.

    The requirements for making any connection to the commercial power grid in a "make before break" generator connection is a good example of the complexity toward connecting an islanded generator into a larger generating grid system. Power company technical requirements are quite stringent with...
  12. DanEE

    open circuit battery monitor

    Concur with ScottyUK above on a number of points.. 1. We used to do open circuit voltage only testing, which I agree was not particularly informative about the battery condition, only for those customers not willing to pay for periodic load testing which does give good results regarding battery...
  13. DanEE

    Problem with use of GPS or similar giving Police a wrong fix.

    It might be worth contacting the Emergency Operations Center Director responsible for the 911 call center covering your area as this is in part a call center/dispatcher protocol/training issue. I'm also a ham, with our ham club being affiliated with and meets in our local EOC facility. It ought...
  14. DanEE

    Train Derailment

    quote: On the old path Amtrak shared the rails with freight trains, so there were often highly unpredictable delays. ditto... I recently took the Via-Rail Canadian from Toronto across Canada to Vancouver. From what I saw and experienced, the amount of east bound rail freight originating from...
  15. DanEE

    On this day in 1975, the "Wreck of the Edmond Fitzgerald" occurred...

    Explored the lakes area spending some time at Saute Ste Marie then heading west, passing through as many lake side towns as practical and up the UP to Copper Harbor on a long 2013 road trip. Was up there on a recuiting trip to Michigan Tech in Houghton in the early '80s and wanted the see the...
See more

Part and Inventory Search

Back
Top