What is the ADD-A-PHASE® power converter?
It is a static converter capable of producing symmetrical three-phase currents from a single-phase source. The name ADD-A-PHASE implies that a phase is added to the already present single phase, accomplished by an autotransformer and a capacitor bank along with the motor’s impedance. Through this combination, a third phase is introduced whose relation to the other two comprises symmetrical three-phase. The motor can then operate as if it were connected to a three-phase power line.
Connection diagram for Static Phase Converter. NOTE: It is best. The single-phase neutral wire is not required for operation of the converter. Properly ground. Rotary Phase Converter. I need help with a good wiring diagram and also need. Living in Australia our single phase supply is 50 hertz 240v whilst 3 phase is.
What horsepower ratings are available with ADD-A-PHASE?
Standard types are available from HP1 through 100 HP. Units up to 150 HP have been constructed. Where high horsepower loads are to be operated, consult the power supplier to determine whether the single-phase line capacity is sufficient to carry the load.
What are typical applications?
ADD-A-PHASE has been successfully applied to operate motors on many different kinds of equipment. Some of the principle applications are pumps, fans, valve actuators, oil pump jacks, and piston type compressors.
What motor speeds can be satisfactorily operated with the standard ADD-A-PHASE, Type 2S?
Speeds of 3,600 RPM and 1,800 RPM can be operated from the standard units. For speeds below1,200 RPM, the ECONO-PHASE® Shifter may be a better choice, depending on the motor’s power factor.
Are special ADD-A-PHASE models available?
Yes. Consult the factory for details. Our engineers are always willing to work on problems arising from specialized applications.
Is ADD-A-PHASE available for 120 V operation?
No. 120 V input unit is not available.
Is ADD-A-PHASE available for 50 cycle, as well as 60 cycle?
Yes. The basic ADD-A-PHASE types are designed for 60 cycle, but 50 cycle units are available. Again, consult the factory for prices and delivery.
Is ADD-A-PHASE available for 480 V or 575 V operation?
Yes. The units for 480 V are catalogued, but the factory should be consulted for 575 V operation.
Can ADD-A-PHASE operate an air conditioner?
Yes. Most air conditioners can be operated with the Type 2SAC. Note that any additional three-phase motors, like evaporator fan motors, units require Type K-Duo for multiple-motor operation.
Can ADD-A-PHASE be applied to submersible pumps?
Yes. It is necessary to check the full load amp rating of the motor. If the FLA of the submersible’s motor is higher than a standard NEMA motor’s FLA of the equivalent horsepower, Type SUB should be used.
Can 480 V three-phase motors be operated from a 240 V single-phase line?
Because of voltage drop, wiring size, starter size, etc., it may be desirable to operate large motors, submersible pumps, etc., at 480 V when only 240 V single-phase is available; the Type “3” ADD-A-PHASE is designed for these applications. Other special voltages are also available such as 240 in/208 out. Consult the factory for pricing and specifics.
How does ADD-A-PHASE benefit the utility?
The ADD-A-PHASE draws close to unity power factor while the motor is starting and running, resulting in lower line current and lower losses in line voltage. The inrush current of the ADD-A-PHASE and three-phase motor is only 3 to 4 times the running current.
If you are reading this then it is most likely because you have acquired (or are thinking about getting) a piece of decommissioned industrial shop equipment that is powered by a 3 phase motor, but your shop only has single phase power. If you don't really understand what the difference between Three phase and single phase is then look here. You have probably heard that you can somehow hook up a 3 phase motor to single phase current to generate 3 phase power. This is possible, because an induction motor and an induction generator are basically the same things. The motor that you are using as a generator (rotary phase converter) is called an idler, and needs to have a 20-30% higher horsepower rating than the largest equipment motor that you will be using, and needs to be rated for 220-240 volts.
To make a simple rotary phase converter out of a 3 phase motor
It really is as simple as that as long as you understand the limitations of such a simple device.
All that being said, it will still work, and there are things that a determined diy (do-it-yourselfer) can do to make the system work better, such as using run capacitors between the L1-L3 and L2-L3 legs to even out the voltage balance. You should also use a Starting capacitor so that you don't have to manually spin the idler up when you start it. If you will only be using 3 phase power occasionally, and aren't concerned with the other limitations of this method then it may be just what you want to do.
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