DUO ADD-A-PHASE®

Because of the design, the ADD-A-PHASE® is not limited to just one motor. The ADD-A-PHASE® can be suited to accommodate as many as 5 or 6 motors. An example where multiple 3-phase motors would need to be operated would be on an HVAC unit. These units normally consist of compressors, condensers, indoor & outdoor fan motors which could all be 3-phase and need the ability to cycle on & off as needed. The advantage herein lies over a rotary phase converter. With each motor on a separate section of the multiple-motor ADD-A-PHASE®, sharing the same common autotransformer, the full load of the converter will only be used when the HVAC unit requires it. With a rotary converter, the base unit must continually run whether all motors are operating or just one.

The DUO ADD-A-PHASE® is a 2 sectioned ADD-A-PHASE® which offers the same efficiency and reliability of the standard ADD-A-PHASE®, with the convenience of one enclosure. It is ideal for applications where a pair of motors in close proximity are periodically operated. In fact, the power factor is actually higher than that of 3-phase motors operated on 3-phase lines. These features make the DUO ADD-A-PHASE® ideal for Duplex Lift Stations, Water Booster Stations, Fuel Pumps, etc.

The main advantage of using a multiple motor ADD-A-PHASE® compared to a rotary converter is the redundancy the ADD-A-PHASE® provides. If something were to go wrong with a rotary converter, the entire load side of the converter would be down as well. With a multiple motor ADD-A-PHASE®, if a capacitor should happen to fail in one of the sections, the other sections can continue to operate, therefore allowing other motors to operate. This is ideal for Lift Station & Booster Station applications. Click on how to Maximize Duplex Lift Station Reliability to read more.

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