We're presently expanding our embroidery and print business. The area we are running the business from only has 1 phase, but the machines (2 of them) we want to purchase run on 3 phase. These machines are fairly big and I was wondering if there are generators that would be powerful enough to run these machines. 3φ 200V~415V. Whats the rough cost of such generators. Thanks a million!!
2007-09-10 07:42:08 · 6 answers · asked by davideac 1 in Science & Mathematics ➔ Engineering
It would be cheaper (much cheaper) in the long run to get the power company to run 3-phase power to your building.
For roughly the cost of a generator plus the connections needed, you could have 3-phase power from the power company -- and not have to pay for fuel costs.
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2007-09-10 07:56:51 · answer #1 · answered by tlbs101 7 · 2⤊ 0⤋
"Fairly big" is not a very useful description of size. I believe that you can buy a generator on a truck that can power motors totaling more than 1000 horsepower (750kW). For something that large, it should easily cost less to get the utility to supply 3 phase.
If you need less than 50 Hp (37kW), a phase converter or two variable frequency drives (VFD) would probably be the best answer.
VFDs are designed for use with three phase motors. They are usually used to adjust the operating speed, but they can be used as a phase converter. VFDs rated 200V up to about 2 Hp (1500W) should be easily available for 1 phase input / 3 phase output. Larger 415V units can be found as 3 phase units connected to 1 phase and operated at less that their rated power.
Phase converters are available as rotating units like motor generator sets and electronic units like VFDs. Care must be taken when ordering one to make sure that it will be able to handle the starting currents of the connected motors.
2007-09-10 09:02:00 · answer #2 · answered by EE68PE 6 · 2⤊ 0⤋
If you bought your own generators, then you would need a way to power them -- either diesel or some type of wind power.
I agree with the guy who said that it might be cheaper and easier in the long run to simply ask the power company to extend their three-phase power lines into your business establishment.
2007-09-10 08:00:56 · answer #3 · answered by Randy G 7 · 0⤊ 0⤋
Rotary phase converters would be cheaper
for your application than generator sets.
They are available in a fairly wide range
of sizes.
If the loads you are adding are large, you
might have to budget for an increase in the
size of your utility service.
2007-09-10 07:58:57 · answer #4 · answered by Irv S 7 · 1⤊ 0⤋
You don't have 3 phase power available from a power company?
..
2007-09-10 07:49:58 · answer #5 · answered by muddypuppyuk 5 · 0⤊ 1⤋
what was the current, power or VA rating on them ?
2007-09-10 07:47:16 · answer #6 · answered by sweety_atspacecase0 4 · 0⤊ 0⤋