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Depending on who does the work it could be less expensive than getting a different air conditioner. The compressor will also need a capacitor and some rewiring. The old unit could have a 3 phase blower motor also which could run the price up even more. Although the changes can be made, the warranty at best will probably be a one year warranty and a new unit could have a 5-10 year warranty.

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15y ago
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15y ago

Probably. 5 hp. is 5 hp., regardless of the phases that drive it. But for practical implementation, you will see following problems: 1] Single phase motor will demand for neutral connection. 2] As entire current for 5HP load will be now on single phase, your conductor will be loaded 1.732 times its rated load ( for 3 phase motor design) Hence it may call for increase in conductor cross section. 3] As entire 5 HP load will be now on single phase, your loading will be unbalanced. Single phase equivalent motor will be of slightly bigger dimension hence mounting arrangement will have to be suitably modified.

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13y ago

If the compressor currently has a 3-phase motor connected to a 3-phase service, then, unless there is also a single phase branch circuit outlet available at the same location, which already has the right sizes of breakers and wiring to suit the motor's power requirement, it is not a simple matter to change the motor to a single phase type having the correct power output and motor controls.

If there is no existing single-phase outlet that is suitable then:

  • either a new single phase service would have to be installed to suit the single phase motor which is being asked about to be used as a possible replacement

    or

  • it would be necessary to change the circuit breakers, wiring and outlet connections of the present 3-phase service to have the correct parts to make a single phase service that would suit the single phase motor which is being asked about to be used as a possible replacement.

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

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12y ago

If you are referring to an air compressor motor then yes. A single phase and three phase motor can be interchanged. They have to have the same horsepower though because the compressor manufacturer has calculated the needed HP to turn the compressor over. You may need to rewire for the single phase motor unless the single phase voltage is the same as what the three phase voltage was. If this is the case just use two legs of the three phase voltage supply. The overload protection will have to be changed to reflect the higher current used by the single phase motor.

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11y ago

If the manufacturer originally matched the compressor motor to the compressor's compressing unit, then that is the size of the motor that it should be replaced with. Under sizing a motor on a specific piece of equipment adds extra stress to the motor's windings which will shorten the motors life.

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10y ago

No, a transformer will not change a single phase system to a three phase system.

Three-phase power is derived from the generating source. Transformers provide for power distribution and isolation, not phase alteration.

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14y ago

Yes as long as the voltages are the same. Two legs of a three phase system can be referred to as single phase.

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11y ago

You cannot run a three-phase motor on single phase. It won't start.

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10y ago

No, a single phase generator can not be used to operate a three phase air conditioner.

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Q: Can a single phase generator run a 3 phase air conditioner?
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Related questions

Does single phase power damage air conditioners?

If the air conditioner is designed for three phase, then it will not run, and could be damaged, by single phase power. Otherwise, no.


Is air conditioner works on 1 phase and how it works on 3 phase also?

If an air condition is single phase, then it can only be connected to a single phase source. Since any two legs of a three phase source are considered single phase, there is no conflict, except to note that the individual phases of the three phase source match the voltage requirement of the air conditioner.


What phase are residential air conditioner units?

Most standard residential service is single phase. Therefore, I would say most all residential A/C units are single phase.


How does RV air conditioner work?

An RV air conditioner works much like an air conditioner in any vehicle. It has a compressor and a condenser that operate in concert to cool the air. In an RV, the air conditioner runs off of a generator when the engine is off.


What capacity generator is needed to start a 5 ton Air Conditioner?

35kva


Will a 1000 watt generator run a 5000 btu air conditioner?

yes


Can a 2000 watt run a camper air conditioner?

Not really. A 2000W generator will give you about 10 amps. Your normal RV air conditioner will draw 12-15.


Can a 120V generator run a camper's air conditioner?

Well all generators with a few exceptions produce 120 volts. What will determine if a generator will run your air conditioner is the number of watts the generator will put out. You need to learn the wattage needed by the air conditioner and also learn the max watts put out by the generator you have (Assuming you have one already) it the generator produces more watts that needed by the AC unit you are good to go. Not on the other hand if the generator you have dose not produce enough watts or you do not have one then it is a matter of buying a generator with the wattage required by the AC unit in your camper. Now if you are going to buy one I would also determine what else you would like to run from the generator (in addition to the air conditioner. Figure out the watts need by these items add them together with the watts needed by the AC unit. Then buy a generator big enough for your needs.


Where is the air conditioner drain?

You have to ask your dealer. In a Chrysler Voyager 97 it is placed beneath the generator.


What phase of phase motor would I need to fix my air conditioning unit?

Contact your local HVAC service and repair man Bring Air Conditioner to a Specialist. Do not attempt to open or repair the air conditioner your self, harmful chemicals can be released if not properly serviced.


What happens to your air conditioner if you lose one 110 volt phase?

If it is a 240 volt conditioner it will stop. If it is a 120 volt conditioner it will stop if it is on the leg that has been lost.


How different is the horsepower used by an air conditioner unit if it runs on either single phase or three phase ac?

There is no difference in horsepower. The manufacturer builds the air conditioner. Engineers calculate and tell the manufacturer how much power is going to be required to make it operate. Smaller units will probably use lower voltage with lower horsepower to operate efficiently. The bigger the unit will take higher horsepower to operate. There comes a point when single phase, low voltage use will not work due to the unavailability of high horsepower, low voltage motors. At this point three phase systems are used with higher voltages to operate the motors. Examples of a 10 HP motor at different voltages. Single phase - 115 volts 100 amps, 230 volts 50 amps. Three phase same HP - 200 volts 32.2, 230 volts 28, 460 volts 14 and 575 volts 11 amps. As you can see if the air conditioner needs a 10 HP motor at single phase 115 volts, a feeder supply of 100 amps would be needed. This compared to the same air conditioner using a three phase 575 volt system which draws 11 amps.