From: Dave Cole (DavidCole@tk7.net)
Date: Fri Jun 21 2002 - 11:27:58 PDT
The cheap phase converters you are talking about are termed Static phase converters and they simply start and run a 3 phase motor by shifting the phase of
the current via capacitors connected to the 3rd phase of the motor. While this works ok if the motor is lightly loaded, if the motor is fully loaded, the motor
windings will overheat and burn out. The only bulletproof way to run 3 phase motors on single phase power is to use a full rotary phase converter which can
supply true balance 3 phase power. I have put together a couple homebuilt rotary converters but they do not supply true balanced 3 phase power. That's
how I am able to run my 10 hp 3 phase compressor and my 5 hp 3 phase turret lathe from my residential service. To keep the maximum load on the
compressor at well less than 100% I simply reduced the maximum cutout pressure from 175 psi to about 140 psi.
Personally I think I would look for a source of cheap 3 phase generators or go with a true rotary phase converter. Don't waste your time with a static
converter on the ac system as the motor is sized very close to the load and will burn out with a static converter.
Good Luck!
Dave
>>>>>>>>>>>>>>>>>>>>>>
6/20/2002 5:59:53 PM, Jim & Pat Winne <jwinne@nettally.com> wrote:
>Hi Claude,
>
>You could buy a phase converter to operate them without converting
>them. MSC Industrial has these units in their catalog and if I remember
>correctly, they are only about $130 or so.
>
>good luck,
>Jim (KB4IVH)
>MVPA #17216
>
>
>At 08:59 AM 6/20/02 , Claude W. Vaughn wrote:
>>Does anyone have any info on the following (manuals, etc.):
>>
>>#1
>>AIR CONDITIONER
>>18,000 BTU/HR VERTICAL COMPACT
>>208 VOLT 3 PHASE 50/60 HZ
>>NSN 4120-01-216-1151
>>P/N TA13225E8000
>>MFG A.R.E. MFG. CO., INC. FSCM 57107
>>CONTRACT # DAAK01-85-D-B008
>>DATE 6/90
>>
>>#2
>>AIR CONDITIONER VERTICAL
>>COMPACT 18,000 BTU/HR
>>208 VOLT THREE PHASE 50/60 HERTZ
>>KECO MODEL F18T-2
>>NSN 4120-00-168-1781
>>P/N 97403 ASSY 13215E9850
>>KECO INDUSTRIES INC.
>>CONTRACT DAHC 26-79-C-0011
>>DATE 5/80
>>
>>Is there any way to convert these to single phase?
>>
>>I know KECO INDUSTRIES is still in business. All I find on a search for
>>A.R.E. MFG. seems to indicate a bankruptcy in 1992. Is A.R.E. Mfg still
>>in business (perhaps under another name)?
>>
>>
>>Also, I am still looking for a manual for the trailer. Manual
>>description is:
>>
>>TM 9-2330-362-14&P
>>
>>OPERATORS, ORGANIZATIONAL, (INCLUDING REPAIR PARTS AND SPECIAL TOOLS
>>LIST FOR SEMITRAILER, VAN: DATA CENTER, XM971 (NSN 2330-01-050-8810)
>>SEMITRAILER, VAN: DATA CENTER, XM971E1 (2330-01-136-7663) AND
>>SEMITRAILER, VAN: PETROLEUM CENTER, XM822E1 (2330-01-162-0642)
>>(REPRINTED W/BASIC INCL C1)
>>
>>
>>
>>Thanks,
>>
>>Claude.
>>
>>
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