Question about Ingersoll Air Tools & Compressors

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I purchaed a used T30 2475N7.5 with a three phase motor. Converted it to single phase. It acts like it is starting under a high load and kicks either the breaker or re-set every time there it pressu

The first thing we checked was the check valve at the tank. It was bad so we replaced it. Then we found that the line from the high comp. cylinder to the tank was staying pressurized upon shut-down. The low compression cylinder can be heard bleeding off through the pressure switch. We put a pin hole in the small plug on the side of the check valve at the tank and that bleeds off that line as shut down. It will struggle for 4 or 5 seconds on start-up, trying to get up to running speed but always kicks the breaker or re-set before it gets up to running speed (3600 RPM). The only way it will start up and get up to running speed without kicking the breaker or re-set is if I let all the air out of the tank. I don't know if this unit has a starting overload feature. It is serial number 30T 790498.

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  • 33 Answers

It sounds like the pressure switch needs replacing as this unloads the machine from the check valve up to the heads if pressure present when trying to restart it will cause it to trip when machine stops should get air leaking from under pressure switch for 1-2 seconds then it will stop

Posted on Oct 16, 2014

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Posted on Jan 02, 2017

dltatsjc
  • 54 Answers

SOURCE: compressor stops then leaks down to low setting

That little copper line is an unloading line, to bleed compressed air out of the compressor head so that the motor can more easily start the compressor. Pressor switch should be threadded into top of air tank, and the unloading valve is built into the side of the switch. When the tank reaches the high pressure setting the switch disconnects power to the motor and opens the unloading valve at the same time. The unloading valve should be connected to the compressor discharge line through a check valve with an unloading valve port upstream of the check valve. These valves are usually threaded into the top of the air tank as well. Sounds to me like your valve was leaking and someone bypassed it.

Posted on Sep 14, 2009

  • 3600 Answers

SOURCE: 2 hp 120 v motor on compressor. motor will not start under load

bleeder valve is bad or dirty drain air unplug machine pull the back up plate control plate and make it shinny with emmeory cloth then clen it and try again, if it still does the same thing your going to nedd to replace unloader valve.

Posted on Apr 14, 2010

  • 1383 Answers

SOURCE: single cylinder/oil free 5.5hp 30gal

If the unloader is not working properly the motor cannot overcome the head pressure. Two things to check. Make sure tank check valve is not leaking. Easy test. With pressure in tank, unplug the compressor from outlet and remove discharge hose at tank and listen for leak or spray soapy water. If leaking replace valve or try to clean debris from valve seat. If not leaking then problem is most likely at pressure switch unloader valve. Follow 1/4 inch hose from checkvalve at tank to connection at pressure switch. When pressure switch reaches cutoff pressure the switch opens the contacts and moves small tang against valve stem to release air from discharge hose. Check for proper function and repair as needed. Good luck.

Posted on Aug 19, 2010

al_kupchella
  • 843 Answers

SOURCE: I have an Ingersoll Rand

When the compressor comes up to pressure and kicks off, you should normally hear a gasp of air escaping. That gasp is the release of pressure from the compressor itself - not the tank, and it is supposed to get released so that the compressor can restart without being preloaded with compressed air. My guess is that the gasp is not happening. It is probably some debris or a gummy mechanism. The mechanism is supposed to be triggered by the same mechanism that shuts off the motor.

Posted on Aug 30, 2010

mrhappyface
  • 205 Answers

SOURCE: hello i have a large

You have a bad check valve

Posted on Jul 08, 2011

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2 Answers

Hi!3-phase motor wires brn/blue/blk no open cct.P.c.b there are no components burnt out or blown.I removed interlock switch and will buy new one and try again.Belt ok.Pump solenoid valve ok .


Check for a motor start capacitor that is defective. This can happen without external symptoms. Highly unlikely Hotpoint washer has 3-phase motor. Most household loads are single-phase. In North American residences, three-phase power might feed a multiple-unit apartment block, but the household loads are connected only as single phase. In lower-density areas, only a single phase might be used for distribution. Some large European appliances may be powered by three-phase power, such as electric stoves and clothes dryers. Three wires could be for different speed ranges or one could be frame ground.

Apr 08, 2015 | Hotpoint Washing Machines

1 Answer

Have a 3 phase compressor model vr5-8 want to know if it can be converted to single phase 230 volt and how


A 3phase motor cannot be rewired to run on single phase power. You need a phase converter. A 3-phase motor will only run on 3-phase power, and a phase converter will convert single phase power to 3 phase. Just google phase converter. There are two basic types, electronic and rotary. The rotary type are more powerful and efficient, but lot's more expensive than the electronic ones. Your only other option is to replace the motor with a single phase motor. Good luck.

May 17, 2011 | Garden

2 Answers

Taking my P660 out out a building with 3 phase power and into one with only single phase. Converter says motor will run on 2/3 power. Good or bad idea????


Good!

MOTOR:

21?2 H.P., Hobart designed, high torque ball bearing,

ventilated within mixer enclosure. Single-phase is

capacitor-start, induction-run type.


Three-phase is

polyphase squirrel cage, induction-run type.


Single Phase 208V 20.0 Amps

240V 17.0 Amps


Three Phase 208-240V 8.6 Amps

Nov 26, 2010 | Hobart P660 Stand Mixer

1 Answer

How can i get single phase power from my 3 phase generator


I have not wire this myself
Wiki says under heading of single-phase:
http://en.wikipedia.org/wiki/Three-phase_electric_power
Single-phase loads may be connected to a three-phase system in two ways. A load may be connected across two of the three phase conductors or a load can be connected from a live phase conductor to the system neutral. Single-phase loads should be distributed evenly between the phases of the three-phase system for efficient use of the supply transformer and supply conductors. Where the line-to-neutral voltage is a standard utilization voltage (for example in a 230 V/400 V system), individual single-phase utility customers or loads may each be connected to a different phase of the supply. Where the line-to-neutral voltage is not a common utilization voltage, for example in a 347/600 V system, single-phase loads must be supplied by individual step-down transformers.

So it sounds like you take 2 legs of the 3-phase.
or
Take one leg of the 3-phase and connect to neutral ... neutral could be a ground rod.

I would put a meter on that circuit before hooking up my power saw.

Nov 17, 2010 | Electrical Supplies

1 Answer

I have a 3 phase electrical motor for my air compressor, How would i connect this from the air compressor pressure switch and towards the electrical source 120V? (for low volt)


If the electrical 120 volt source is single phase, the only way to run this motor is with a single phase to three phase converter. Best to sell the three phase motor and obtain a similar horsepower 120 volt single-phase capacitor-start motor (1750 RPM) for the compressor. You would also require a 3-phase pressure switch for use with the 3-phase motor. Hope this helps!

Nov 05, 2010 | Garden

1 Answer

Have a 3 phase 7.5 HP IR compressor,want to put a 7.5 HP single phase motor on it,how do I wire the starter switch


You will use two of the original three wires. Not knowing if you have a motor starter and how it is wired makes it impossible to give you details.

BE AWARE that a 7.5 HP single phase motor is going to draw a massive starting surge compared to a three phase motor. I assume this is on a 240 volt system as it would NOT be practical to use a motor that size on a 120 volt system.

Expect to require around a 30 to 50 amp single phase feed to the motor.

Dec 20, 2009 | Air Tools & Compressors

1 Answer

I have a 220 440 electric motor on my 4 post 3 ton car lift which ran on 3 phase, how can i run this motor from a single phase supply, regards dave


You need to either change the motor to a single phase or check into a single to three phase converter...I would do which ever is cheaper myself. You could go single phase, but the cost of operation would be higher depending on the duty cycle.

This link may help: http://www.phaseconverter.com/starting-load.html

HTH
Mike..

Nov 20, 2009 | Plumbing

1 Answer

Need to convert 3 phase Hobart dishwasher to single phase


It will not be inexpensive to convert your dishmachine over to three phase. With everything that you will need to replace, depending on the model if converyor or not it may run close to what it costs to have 3phase run to the building that you plan to move into.

Jun 08, 2009 | Dishwashers

2 Answers

Converting from three phase to single phase


Do you want to convert 3 phase to single phase?What voltage do you currently have (220v 3phase)?

May 07, 2009 | Kitchen Appliances - Others

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