VFD in the news?
VFD in the news?
(OP)
VFD run amuck?
http://video.msnbc.msn.com/nbc-news/50389900#50389...
http://video.msnbc.msn.com/nbc-news/50389900#50389...
Keith Cress
kcress - http://www.flaminsystems.com





RE: VFD in the news?
That's my story and I'm sticking to it. GRIN
Bill
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"Why not the best?"
Jimmy Carter
RE: VFD in the news?
Keith Cress
kcress - http://www.flaminsystems.com
RE: VFD in the news?
"Will work for salami"
RE: VFD in the news?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: VFD in the news?
Keith Cress
kcress - http://www.flaminsystems.com
RE: VFD in the news?
My remote internet connection (hotel in La$ Vega$) is too slow now to be able to watch this again, but IIRC at the end doesn't it resume running in the correct direction? How is that going to happen with a blown fuse?
"Will work for salami"
RE: VFD in the news?
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: VFD in the news?
I like the efficiency, that way I can get to my business right away with no further distractions. I'm here to help negotiate a huge MV drives and a huge LV Motor Control Center project for a power plant. Hoover dam no longer can cut the mustard for supplying the flashing lights and signs now I guess.
"Will work for salami"
RE: VFD in the news?
Don't confuse LV for Low Voltage.
I don't think the escalator starts going the right direction. It just looks that way because the camera is riding on the down escalator. When the crazy one stops it looks like it's moving forward.
Keith Cress
kcress - http://www.flaminsystems.com
RE: VFD in the news?
I have modified my gaming theory and I now know how to get all the way to the tables without lose it all before getting there. What happens at the table is quite another thing.
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: VFD in the news?
I can see how a fault on that sort of system might allow it to do an undemanded reverse.
A.
RE: VFD in the news?
I was involved in a failed experiment a few years ago with an aftermarket escalator control mfr on a project like that where we used a laser scanner looking for feet aproaching the escalator to only turn it on when someone came near. The failure was, when people saw that the escalator was not moving, or perceived that it moved unexpectedly as they aproached, they would not get on it! They tried putting up signs explaining it, nobody read them. Getting on an escalator has become so habituated for us that we don't think about it much, so anything out of the ordinary looks like a red flag. It will take a long tome for that to be accepted.
"Will work for salami"
RE: VFD in the news?
And wow.. Some of those peoples faces seemed like their world was going to end that second.. Its just an escalator people.. There is no "HOT LAVA" at the bottom.
RE: VFD in the news?
It's sad to see people just kind of freak out instead of acting in some logical manner.
Keith Cress
kcress - http://www.flaminsystems.com
RE: VFD in the news?
A.
RE: VFD in the news?
It was a simple odd elevator 3 phase motor without a phase reversal relay.
Tried to start, blew a phase then started in the wrong direction ending up below the ground floor.
No harm done.