Smart Phase™ Digital Rotary Phase Converters

Excellence in a box!  Smart-Phase™ is a highly engineered digital rotary converter with tight voltage balance control.   Best suited for ultra voltage sensitive machines, high performance machines and/or multiple loads running simultaneously.  Smart-Phase™ is the newest industry advancement in phase converter technology.   “AVR” is a 9 stage automatic voltage regulation.  Solid state switches are used to regulate the voltage and provide precision balancing across all three legs of power for your important equipment to run as efficient as possible.  If you run the best, run Smart-Phase™.

Ideal Applications: CNC Mills, CNC Lathes, motors controlled by a VFD or equipment loaded with electronics and critical voltage balance requirements.  Or if you just want great power.

Shop Smart Phase

Control Panel Features

  • Built-In Motor Starter with Start/Stop Switch
  • Digitally Controlled & Protected Start Circuit
  • Complete Phase Power Failure Protection
  • CNC Voltage Balancing
  • Power “ON” Indicator Light
  • Easy Installation
  • Distribution Block Connections
  • Power Factor Corrected
  • Made In the USA
  • Lifetime Warranties

Idler Motor Features

  • Custom Made Rotary Phase Converter Generators
  • Low Impedance/High Efficiency Design
  • ODP (Indoor) Standard, TEFC (Weatherproof) Available
  • Custom Copper Windings and Rotor
  • Made by ABB / Baldor Electric USA
  • Made in America
  • Sealed Bearings

Available Upgrades

  • Wireless Remote Starters
  • UL Listed Control Panels
  • NEMA 3R Enclosures
  • Plugs and Outlets
  • Automatic Controls
  • Power Time Delays

Smart-Phase Model Comparison Chart

All amperage in table reflect 208 to 250 volt usage
Pricing includes Rotary Phase Converter Control Panel and Generator Motor


Complete Details of Features

Standard Heavy-Duty and High-Low Double Horsepower Rated

NAPCco offers two different static phase converter models to choose from. Our Standard Heavy Duty (SPC) is a robust static phase converter and has your classic horsepower ranges. Our High-Low Double Horsepower Rated (HL) models are two (2) Standard Heavy-Duty Static Phase Converters built into one. The HL model has a high and low horsepower range setting. The setting is easily selected by a toggle switch on the front cover of the unit.

Runs most motors at two-thirds power

A static phase converter uses motor start capacitors to start a 3 phase motor on single phase power. These capacitors are disconnected once the motor reaches full RPM. The motor continues to run on the 2 single phase lines of power. Two-thirds of the motor windings are being energized, producing approximately two-thirds of the motors power.


Easily accessible wiring junction box

Top mount junction boxes are easily accessible, making wiring a snap and can be completed in minutes.

Universal mounting options

Our static phase converters include hanging brackets that allow for wall or machine mounting.

High Voltage Rated Start Capacitors (330V)

High voltage rated start capacitors can withstand higher surges of voltage without failure. The capacitors are also mounted with bleed resistors to help discharge heat and voltage in the capacitors. These resistors help extend the life of the components.

Digital / Electronic Motor Starting Relay

All NAPCco converters have a motor starting relay that is a digital/electronic phase converter. The patented differential voltage sensing circuit knows precisely when the motor is up to speed and when to disconnect the starting circuit. This is the same digital motor start relay used in our Pro Line Rotary Phase Converters. Additional built-in features include over-voltage protection and safety time out.

Single Phase Input Power Block

Robust Start Circuit

Heavy duty relays and contactors are used to tolerate the high amperage flow during start up. We use enlarged components because we want this unit to last as long as your machine does.

Made In the USA

  • Pro Line Rotary Phase Converters are proudly made in Wisconsin
  • Built by a UL 508A Panel Shop(Not every panel is UL listed)
  • Clean design makes for easy inspections
  • Din rail mounted components and twist and release capacitors

Please call us at 877-545-2926 or use our contact form …

if you have any questions about our products, features or sizing!