WANTED: 50hp Phase Converters - - - Tax Deductible - - EAGLE SCOUT Gov't Service Project

No they are *not*! In fact they put them in in the 80's (well after I left the region).

In the midwest, if you hear a CD siren you'd better find a place to hide your sorry ass. There is a tornado right on it! They only fire 'em up if it's on the ground and confirmed, so you'd better know what to do before you hear it.

Reply to
keith
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place your head firmly between your knees, and kiss your ass good-bye."

Cheers! Rich

Reply to
Rich Grise

Hi, Thanks again for your replies. I am afraid that I am a little confused on how we can use anything less than a 25hp phase converter. I am no expert here, so I am just trying to understand it myself. Just simply from browsing the internet, and eBay, it appears to me that the specialist I called was correct in the fact that it needed to be a very large phase converter. The sirens have a RLA of 89amps, and a mandatory government safety, has to exist regulation of the phase converter being able to produce 100amps.

So I am looking for a phase converter to produce 100amps.

A chart I found at the following link states that the phase converter must be at least a 25hp motor in order to generate 100amps.

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So accounting this chart, can I use a smaller motor, like a 7.5hp motor, and still generate 100amps?

Also, I am getting ready to write a press release in order to gain some media attention and community support for my project. I have been persuing over the last several months trying to get APS involved, and my efforts so far have been in vain. The only returned call from APS out of many many messages, 6 or 7, possibly more that I have left for APS was simply to say I had the wrong person, which new person, many phone messages later, still won't return my calls. So the press release has many functions. A: Simply to inform the public of my project. B: To see if someone who reads it knows where there is an unused surplus phase converter at an old farm or machine shop or something, and C: To show everyone, specifically at this point APS that I am serious, and see if a newspaper article might help them jump on the project a little bit quicker. So I know the technical details of how to circulate a press release, etc., thanks to my wonderful Eagle Scout Advisor, but I am just curious on if anyone has any suggestions on what to say or how to phrase it besides the base explanation of my project. Should we leave it at simply that, an explanation of the project? Or should we try and draw public support and donations? Any suggestions would be greatly appreciated.

Thank you everyone for your time in this matter. Jkeagle13 (at) aol (dot) com

Reply to
jkeagle13

I read in sci.electronics.design that snipped-for-privacy@aol.com wrote (in ) about 'WANTED:

50hp Phase Converters - - - Tax Deductible - - EAGLE SCOUT Gov't Service Project', on Sun, 2 Jan 2005:

Something doesn't make sense. Your motors total 13 HP, which is 13 x 746 watts = 9698 W, say 10 kW. This implies a *single phase* 220 V current of 44 A. To start the motors you will need a current larger than that.

100 A would be a generous allowance for starting if you were using single phase, but in the three-phase system, the current per phase is not 44 A but 44/sqrt(3) = 25.4 A, so 50 A per phase would be a generous allowance.

I think you need more technical advice *locally*, to see why you are being given inconsistent specifications.

Reply to
John Woodgate

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