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
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
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...
"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
"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...
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
" - 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...
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...
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...
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...
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...
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