What kind of avr?
Are you talking about the voltage regulator furnished with the generator?
If so, what make, size, engine, voltage? 60 hz?
Or are you referring to the AVRs that are commonly used on line power? (say for a computer)
there are several types of these:
ferro-resonant transformer...
I think Hacksaw has summed it up:
Unless the customer required that it be built using certain components or wiring practice, you are OK unless you did something really poorly, or unsafe.
(looks do count a little bit!)
I had some trouble with a senior engineer when I first started about the...
I left out some info here:
Longevity and reliabilty aren't too critical for this app. (I guess they couldn't be for something running at 300% it's intermittent rating!)
I may have a few precedents:
The "Low Rider" jumping cars are barred from using hydraulic accumulators, so they...
Hey, I think Ramconsult has raised some really interesting issues:
I think that the paralleled/infinite bus/isolated question is interesting due to the effect that a heavy lagging 500KVA+ load from a DOL start 75 hp motor might have on an isolated 2MVA genset.
I especially agree with...
I'm sorry, I neglected to credit ScottyUK for recognizing the specific case of the fan re start torque requirements:
"In the specific case of a fan, the torque required is low and the motor will probably start with the transformer you suggest"
If you driving the relay with a non-electronic switch (i.e another relay or a toggle switch) the auto environment is so full of spikes that it might be ok to omit the diode.
It IS good practice to supress, and a small, cheap "no polarity" way to do it is a "ZNR" disc ...
Aquarius is certainly correct about the starting current drawn by a motor being independent of the load.
ScottyUK did answer it in his first line of the very first post:
"Suggest you identify the minimum voltage you can accept at the motor terminals for a successful start, then calculate...
Wow, what a lengthy thread!
I think that some of the respondents are not recognizing that a fan load is the easiest of all loads to start (NEARLY zero starting torque).
Contrary to some posts, I'd have to say that the transformer could be sized based on the continous rating and that the...
I'm hoping to use a 12vdc@150amp rated intermittent-duty series winch motor on 36vdc @150a for 5 or 10 seconds.
(The motor looks a lot like a starter motor for an automobile)
I think it's designed to run at about 2500 rpm @12v w/ rated load, but I'm looking for 7500rpm w/rated load.
I don't...
