I have a craftman 30 gallon compressor, and when it's turned on sounds like a 3 phase motor lossing a leg. It humms and won't spin, however it draws over the current limit (15amps). I checked the windings and seems to be ok. Please Help. Mod. # of compressor is 919.167311 motor is 115 single phase (of course) at 3450 rpm 56z frame

Did you change the 3 phase motor out with a single phase motor? A 3 phase motor cannot be made to run on single phase.

Hi robles212
To convert your T-30 to single phase you will have to do one of two things.
1. Change the motor to a single phase motor
2. Buy and install a "Phase Converter" to convert 3 phase to single phase
Please rate me
Bud

You can wire any heater with elements to single phase because all heaters are single phase. It will require a larger feed because your amp draw is going to go up doing away with the third leg. You split the heaters up from 3 phase to 2 legs amp draw is going to go up 30 percent or so.

According to the information you provided your looking at a 10 HP motor at three phase. Do you have three phase at your location? If not I would look into getting a single phase compressor. If you do want to get it going I would notify your local IR dealer so they can get you the right Model number, RPM, Pulley and Motor Frame Size to match your unit.

Please read below....Jim...if this helped you please send me a positive response...Thanks!


Ingersoll-Rand Type-30 Electric-Driven Two Stage Horizontal Air Compressor - 120 Gallon - Fully Packaged IR 2545E10VFP

• Designed for heavy shop or industrial use, Ingersoll-Rand Two-Stage electric air compressors provide the quality and performance that are ideal for most applications and users, including: automotive service and body shops; fleet maintenance; machine shops; production and manufacturing lines; construction; wood working shops; dry cleaners; car washes; maintenance/repair shops and farms.
• Durable cast-iron, two-stage design offers extended pump life for years of trouble-free service 175 PSI maximum operating pressure
• 100% continuous duty for tough applications
• Automatic start/stop control/pressure switch operation
• Includes motor starter, oil sight glass (10-15 HP only), manual drain and ASME tank
• 10HP, 3 Phase 200, 230 or 460 Volts
• 120 gal, horizontal tank
• 35 ACFM @ 175 PSI

When you google home made 3 phase converters, you will find many ways to make use of 220v single phase instead, however you are limited as to the hp that the motor will produce. If you spin the motor first then apply 220v, the motor will continue to turn at much reduced hp. You need full power to turn a type 30 pump depending on pulley combination/ setup. Best to return the unit and get one that will run on 220v single phase. It will most likely consume more power to do the same work however it would cost a great deal to install 3 phase. Most likely not even available at all. Many years ago, I worked at Sears and happened to see an electrician coming down from roof access of building. He told me that sears had a 3 phase generator being turned by a 220v single phase motor to run an air conditioning unit. He said that it worked quite well. Does not sound cost effective.

Trt this link IngSoll.

One dealer for your model compressor is Northern. They are very good at replacement parts. If you do not have 3 phase power, you could shop around for 5 to 7 hp 220 v motor making sure that the motor mount will align with your plate. Pully size depends on dia. of pulley on the pump. Most pumps turn between 550 min to 1100 rpm depending on the power available and cfm requirements. Most motors turn at 1725 rpm so for example if your compressor has a 14 in. pulley then you motor will need a 5 in. pulley to turn it about 620 rpm. The larger the pulley at the motor the higher cfm produced but more amps used. Motor speed x pulley dia. divided by compressor pulley dia. To obtain more efficiency and highest cfm you will need 3 phase. Good place to see motors and two piece pulley combnations is www.grainger.com. Good luck

Make sure you are plugged direct. No extension cords

amp draw will be 6.9 amps per leg cutout switch will be rated for 30 amp locked rotor per leg fan runs 5 amp draw continuous here is the web page it's pdf format. Liberty A/C Unit (FH245AUA00 - 480V 3 Phase http://www.rvii.com/bspdf/20x20x38.pdf.

You will need a rotary converter for this, or a single phase motor. A three phase motor absolutely cannot be made to run on single phase otherwise.