Pro-Line Rotary Phase Converters

CNC Rotary Balanced, by design!  PRO-LINE exceeds industry performance standards; powering sensitive modern CNC and traditional three-phase equipment. North America’s Pro-Line rotary phase converters for sale go further with efficient removable back plates, built-in motor starter, digital start protection, soft start, and full three-line break; all with simple installation. Reliability is important and supported by a 10-year warranty. In true North American form, we design Pro-Line rotary phase converters to work; every day, for a very long time.

Do right by your equipment and feed it the balanced power Pro-Line is engineered to offer.

Best Applications: Mills, Lathes, Dough Mixers, Table saws, typical motors, resistive and inductive loads.  Join the NAPCES family and get back to work.

Open PL-10 Control Panel

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
  • Soft Start 

Available Upgrades

  • UL Listed Control Panels
  • Wireless Remote Starter
  • Wired Remote Switches
  • 480 Volt Control Panels
  • Floor Mounting Kits
  • Automatic Controls
  • Power Time Delays
  • Plugs and Outlets

Pro-Line Model Comparison Chart

All amperage in table reflect 208 to 250 volt usage
Pricing includes “Rotary Phase Converter Control Panel” and “Idler Generator
Please contact us by phone (877.545.2926) or email ([email protected]) if you have any questions

Quick Sizing Chart for Pro-Line Rotary Phase Converters 

Phase Converter Model Motor Loads (Horsepower) CNC, Resistive & Inductive Loads Phase Converter Model
Easy Med Hard Very Hard Total Amps Total kVA Total kW Spindle HP
 PL-3 2.5 2 1.5 1 4 1.6 1.1 1.5 PL-3
 PL-5 3 3 2 1.5 7 2.9 1.7 2.5 PL-5
 PL-7 5 5 3 2.5 11 4.5 2.2 3 PL-7
 PL-10 7.5 6 5 3 15 6 3.7 5 PL-10
 PL-15 10 7.5 6 5 20 8 5.6 7.5 PL-15
 PL-20 15 12 10 7.5 25 11 7.7 10 PL-20
 PL-25 20 15 12 10 30 13 9.5 12 PL-25
 PL-30 25 20 15 10 37 15 11.8 15 PL-30
 PL-40 30 25 20 15 50 21 15.5 20 PL-40
 PL-50 40 30 25 20 61 25 21.5 25 PL-50
 PL-60 50 40 30 25 72 30 26.5 30 PL-60
 PL-80 60 50 40 30 100 41 29.6 40 PL-80
PL-100 75 60 50 40 122 50 37.3 50 PL-100

Videos about Installation and using the Sizing Tables

Rotary Phase Converter Installation Video

30 Second Video on “How to size a Rotary Phase Converter”

Complete Details of Features


Built-In Motor Starter with Start/Stop Switch

• Self-contained built-in magnetic 3-phase motor starter
• Money saving feature because every rotary phase converter needs a starting mechanism
• Start/Stop switch ideally located on the front of the rotary phase converter control panel for easy access and where it should be

Digitally Controlled & Protected Start Circuit

• The latest in solid state technology
• Patented Differential Voltage Sensing
• Safety Timer – times out to eliminate capacitor failure
• Our Pro Line Rotary Phase Converters are the only phase converters where this technology is available


Complete Phase Power Failure Protection

• Built in protection protects the rotary phase converter and your equipment in the event of a power loss
• During a black out, the Pro-Line Rotary Phase Converter shuts down all 3 legs of power
• Some brands only shut down the generated leg and can cause single phasing when power resumes

CNC Voltage Balancing

• CNC Voltage Balancing allows you to run even the most sensitive machines
• Voltage balanced phase-to-phase to within 5% or better
• These Pro Line Rotary Phase Converters for sale offer the largest voltage balanced range on the market

Run Capacitors

Power “ON” Indicator Light

• Shops are a noisy place. This bright light on the front panel lets you know your Pro Line Rotary Phase Converter is up and running.

Easy Installation

• Removable back plate design makes the rotary phase converter control panel enclosure light and easy to install
• Terminal block connections make wiring a snap
• Knockout placements on on the bottom and right side allows easy wiring access

PL-10 Open Control Pnael

Power Distribution/Terminal Connection

• Simply strip, place and tighten wires
• Generously over-sized power distribution blocks make wiring a Pro Line Rotary Phase Converter a snap

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

Made in the USA
Generator motor

Custom made Generators by ABB/Baldor USA

• Purpose built with Soft Start for low inrush starting
• Custom copper windings and rotor
• ISR magnetic Windings – Immune to Voltage Spikes

Low Impedance/High Efficiency Generator Design
• Designed to allow for the maximum current and voltage balance
• Low resistance produces high efficiency
• Built to run cool and quiet

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

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