What motor specs are needed to convert IR T-30 to single phase?

by Chris
(Pittsburgh, PA)

I bought an IR T-30 with a bad motor. I need to convert it to single phase.


Here are the specs of the current motor:
Brand: Baldor
Cat #: 37F360X532
Frame: 254T
HP: 15
Volts: 200
Amps: 44.8
RPM: 1760
Hz: 60
PH: 3
Nom Eff: 87.5%
PF: 80%

What specs would the single-phase motor need for this compressor?

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May 27, 2015
T30 motor size
by: Bill

Thank you for your comments, Ray O.

B.

May 27, 2015
Mistake
by: AnonymousRay O

I mistakenly said 19 hp single phase motor. I meant to say 10 hp 230/1/60. And even at that, if it were mine and I wanted it to last, I would change out the drive pulley to a smaller size and take some load off the motor.

Most compressors are loaded about 10% into the service factor of the motor. Just to be able to claim as much as the other mfg lie about theirs.

Remember, the people rating and running compressors like that sell new equipment and do service work. So tear it up and we will sell you a new one or fix this one.

Better to protect yourself.

May 27, 2015
15 hp 1 ph
by: Ray O

You are going to have a big problem finding and getting a single phase 15 hp compressor to run. In 40 years of selling and working on recip type compressors I have never run across one. The amp draw is very hard to manage, and hard on all systems in the electric service. Do yourself a favor and get a 10 hp & 5 hp, two 7.5hp. Something managable. and never run the compressors to any higher pressure than you can live with. Higher pressure just wears out the equipment faster and causes all kinds of problems.

IR is a good brand if you stick with T30, Talk to a good electrician, 19 hp is max you should ever try with single phase.

May 12, 2015
Motor/Pump T30
by: Doug in s.d.ca

Might be good to get another 254T frame, too.

It's likely to draw 50 amps or more, so ideally you want to get an electrician to wire power for it, preferably one with experience in motor circuit design.

May 12, 2015
Compressor motor specs
by: Bill

Well, I'm not an electrician, but if I were looking for a single phase motor for this compressor, I would get a 15 HP, 230 Volt, 1760 RPM. I know they are out there 'cause I just found one on line.

I also suspect that you're going to need a major amperage breaker because of the inrush amp draw for a motor this big.

However, let's see if someone that knows electricity a lot better than I has a comment too, K?

Bill

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Ingersoll Rand T30 motor size

by Terry Slane
(Wildomar Ca,)

Ingersoll Rand T30

Ingersoll Rand T30

Hello Bill

My name is Terry and I recently acquired a T30 Ingersoll Rand two stage compressor that has a 7,5 HP Balder 3 phase electric motor 1725 RPM. My question is I would like to change the motor to a single phase 5HP motor, can you tell me if this will run my compressor ok?

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May 28, 2015
IR. 253
by: Ray O

The model 253 compressor is originally a 5hp. A good 5hp.
To get you to buy it IR would over speed it and call it a 7.5 or even 10hp. Only the uneducated would ever run that compressor that fast. To begin wit it just wears it out quicker, the heads, valves, inter cooler etc are not sized for this much capacity. I don't still have my books on T30 but I guess the rpm should be 500 - 600 rpm. They would run years like that.

Call the Ingersoll Rand customer center in Dallas. Ask to speak to the application engineer for T30. He can look up the right rpm and pulley size for you. With a little prodding.

This is not a 10hp compressor no matter what anybody tells you.

Keep the air pressure as low as you can live with. Use a magnetic starter. Change oil. It should serve you well.
And use a check valve before the tank. And have a provision to unload head pressure before restarting.

Apr 28, 2015
Motor size
by: Terry

Thanks for responding to my question, the pump is a Ingersoll Rand 30T MODEL 253. SERIAL NO, 553408. That is all the information that is on the pump. The compressor was removed from an auto shop in a school and seemed to work fine with the 7.5 motor. I would like to change it to a 5 hp motor though and am not sure if it will drive the pump? does anyone know where I can get the specs for this model?

Apr 27, 2015
Motor/Pump T30 / 2545
by: Doug in s.d.ca

The pump is a 2545?

The pump is supposed to run on 10-15 HP, so that motor is already a little small. The pump RPMs are supposed to be in the range 400-1050.

Can you run it with the existing motor?

Can you figure out the pump speed?

So, if you can get a motor pully that runs it at 400 or so, then it may work.

Good luck.

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IR Type 30 - we are not sure that the motor is turning correctly

by Brian
(Hicksville, ny)

we just bought a compressor with no fly wheel. We were able to get a new wheel but we are not sure that the motor is turning correctly. When looking at the motor does it turn clockwise or counter clockwise?

Regards Brian
________________________

Brian, is there no plate on the motor?

According to this "The direction the shaft rotates can be changed on most motors by switching the right wires, there is usually a diagram on the motor.

The direction of rotation is usually determined by viewing the motor from the shaft end and is designated as CW (clockwise) or CCW (counter-clockwise). Note: Some manufactures may have a different method of determining shaft rotation but will usually make a note of it." from www.sawdustmaking.com.

I have looked at all the specs for the IR 30 compressor I could find, and it does not indicate the motor rotation, to help you orient the rotation of the flywheel.

If no one else can post this info for you, visit the local IR sales location, and observe the new ones. That's what I would do.

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