The GPX40L Digital rotary phase converter delivers 40 HP of precision three-phase power from your single-phase 230V service. Unlike standard rotary converters, the GPX40L uses digital voltage regulation to maintain tighter voltage balance across all three legs — critical for production shops with CNC machining centers, lathes, and precision equipment. Clean power, no voltage sag, no guesswork.
| Model | GPX40L |
| Series | GPX Digital |
| Total Running HP | 40 HP |
| Largest Starting Motor | 20 HP |
| Digital Voltage Regulation | Yes — active balancing |
| Input Voltage | 230V Single-Phase |
| Output Voltage | 230V Three-Phase (balanced) |
| Service Size | 50 kVA (200A) |
| Breaker Size | 80–200 |
| Single Phase Wire Size | 1/0 AWG (under 50 ft) |
| Idler Motor Wire Size | 3 AWG |
| Idler Motor | 539 lbs — 324T NEMA Frame |
| Electrical Panel | 51 lbs — 20" × 12" × 8" |
GPX Digital Series Wiring Diagram — single-phase 230V in, digitally balanced three-phase 230V out
📦 What's Included
- ✅ 40 HP TEFC Idler Motor (continuous duty, cast iron frame)
- ✅ Pre-wired Digital Control Panel with Voltage Regulation
- ✅ Digital Power Grid System (active voltage balancing)
- ✅ AutoLink Soft-Start System (built in)
- ✅ Voltage Display Panel
- ✅ Complete Installation Manual & Wiring Diagrams
- ✅ Lifetime Warranty — motor & panel
Why the GPX40L Digital Phase Converter
Active digital balancing keeps all three voltage legs within tight tolerance. Essential for CNC machines, VFDs, and sensitive electronics that demand clean power.
Tighter voltage balance than standard rotary converters. The digital system compensates in real time — your equipment sees utility-grade three-phase power.
One converter powers your entire shop — up to 40 HP of simultaneous three-phase load with digitally balanced output across every machine.
Thermal and magnetic protection with AutoLink soft-start. The digital controller monitors voltage and current continuously to protect your investment.
Continuous duty rated. TEFC motor handles 24/7 operation in demanding environments — dust, heat, and vibration won't slow it down.
Built-in voltage readout lets you monitor all three legs at a glance. Verify balanced output without pulling out a multimeter.
IP65 Weatherproof Control Panel
Every panel is rated IP65 — fully sealed against dust and water jets. Install indoors or outdoors with confidence, even in harsh shop environments.
Heavy-Duty TEFC Idler Motor
Totally Enclosed Fan Cooled motor with cast iron frame, precision-balanced rotor, and sealed bearings. Built for decades of continuous industrial service.
🏗️ Common Applications for 40 HP Digital Phase Converters
The GPX40L Digital phase converter is the preferred choice for equipment that requires tight voltage balance — CNC machines, VFDs, precision tools, and sensitive electronics that can fault or produce poor results on unbalanced power.
GPX40L Technical Documentation
Complete specs, wiring diagrams, and installation instructions for this digital phase converter
Talk to an engineer — we'll help you choose between standard and digital phase conversion
The GPX40L is a 40 HP digital rotary phase converter designed and manufactured by Phoenix Phase Converters in Phoenix, Arizona. The GPX Digital series features active digital voltage regulation that maintains tighter voltage balance across all three phases compared to standard rotary converters. This makes the GPX40L the preferred choice for CNC machines, VMCs, EDM equipment, and other precision tools that require clean, balanced three-phase power to operate correctly.
Digital phase converters from Phoenix Phase Converters combine the reliability of a heavy-duty rotary converter with the precision of digital voltage control. The result is utility-grade three-phase power from your single-phase 230V service — without the $10,000+ cost of running three-phase lines from the utility company.
Not sure whether you need a standard or digital phase converter? Our engineers can evaluate your equipment requirements and recommend the right solution. Call us at (800) 417-6568 for a free consultation.
🏆 Why the PL (Premium Line) Series
The GP30PL is our heavy-duty industrial-grade rotary phase converter. Built for continuous-duty commercial and industrial applications where the equipment runs 8+ hours a day, every day.
Premium construction: larger idler motor mass than the NL series at the same HP rating, oversized capacitor bank, upgraded contactors, and heavier gauge internal wiring — all designed for decades of reliable service in commercial machine shops, CNC facilities, wood shops, and metal fabrication.
🛡️ Warranty & Support
Lifetime warranty on idler motor and control panel. If any component is defective within the warranty period, Phoenix Phase Converters will repair or replace it at our discretion, at no cost to you.
Return policy: Sealed, unopened packages are eligible for return within 90 days of purchase. Contact us before returning.
Dedicated engineering support: Every order is assigned to a Phoenix representative. Call (800) 417-6568 before, during, or after installation for sizing questions, wiring help, or troubleshooting.
Helpful guides
Deciding between series? Our knowledge hub covers the trade-offs:
- NL vs PL — which series is right for you? — how to choose between the standard and premium line
- How to size a rotary phase converter — step-by-step sizing for continuous-duty loads
- Phase converter FAQ — quick answers to the most common questions
- Rotary vs static comparison — see why rotary is the right choice for premium applications
