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RPCs use the same components that exist in electric motors. We have taken the best features, and worked with factory engineers to redesign these components for exclusive use in rotary phase converters. Standard motors can be used with capacitors to start rotation, but they are not as efficient, and won’t handle electrical stresses as well. We have redesigned the rotor, laminations, and winding density in our units for the maximum benefit, as a rotary phase converter. It is also important how the capacitors are used and wired in the system. These items make us unique.

We always recommend the use of an industrial, rather than residential electrical contractor, because they typically have more experience with electric motors. The process of connecting RPCs is not difficult, but definitely requires an above average knowledge of electricity and wiring systems.

Pennies an hour. Because we use more copper and iron in our designs, we tend to be more efficient than other units. It is good to know that any RPC is in its most efficient state when it is under or close to full load. An RPC that is running and not delivering current to a load will cost more to run, than a “working” unit. The cost of running a converter with a 3 phase motor will cost no more than running a single phase motor.

Rotary Phase Converters are amperage producing devices. As such, sizing requires simply knowing how many total continuous running amps and starting amps you will need. From there, it will be important to review our Convert-A-Phase Load Calculation Questionnaire and Data Entry Form. It provides enough information so that a misapplication can be avoided. Frequently, RPCs are rated in horsepower. Using HP makes sizing simple, but a bit more dangerous. It glosses over potential hazards in tough or unique applications.

Electric utilities generate three phase power through transformers. Typically the voltage is balanced within plus or minus 5%. RPCs are rotary motor generators that induce a third single leg. In many single phase environments two lines are available; each with 115 volts to ground or 230 volts between lines. RPCs provide the needed third line of 115 volts, at particular amperage, based on the size of the unit, and the single phase amperage available. Because the third leg is manipulated through the use of capacitors, it will typically be higher than the utility company’s 230 volts between lines. This higher voltage drops to a more normal level when the RPC is driving a customer’s machinery. Be sure to check volts and amps when machinery is under full load.

Cost, ease of startup, less maintenance, size, noise, dealing with old gasoline. Call us for the many other reasons.

Sometimes in units over 50 amps, officials get curious. We have not heard of mandatory reporting unless you need to increase the size of your single phase service.