The GP7NL rotary phase converter converts single-phase 230V power to three-phase 230V — giving you 7.5 HP of continuous capacity to run your shop equipment. Built for small machine shops and fabrication businesses that need reliable single phase to three phase conversion without voltage drop or motor strain.
| Model | GP7NL |
| Total Running HP | 7.5 HP |
| Largest Starting Motor | 3 HP |
| Service Size | 15 KVA (40A) |
| Breaker Size | 15 MIN – 40 MAX |
| Single Phase Wire Size | 6 AWG (under 50 ft) |
| Idler Motor Wire Size | 8 AWG |
| Idler Motor | 158 lbs — 10" × 10" × 15" |
| Electrical Panel | 21 lbs — 16" × 16" × 6" |
NL Model Wiring Diagram — single-phase 230V in, three-phase 230V out
📦 What's Included
- ✅ 7.5 HP Idler Motor (TEFC, continuous duty)
- ✅ Pre-wired Electrical Control Panel
- ✅ AutoLink Start System (soft-start built in)
- ✅ Complete Installation Manual & Wiring Diagrams
- ✅ Lifetime Warranty — motor & panel
Simple, Labeled Installation
Every terminal is clearly marked — T1 and T2 for your single-phase 230V input. No guessing, no electrician headaches. Connect your single-phase supply and you're running three-phase power.
Why the GP7NL Phase Converter
Clean, balanced three-phase power from your single-phase supply. Won't damage sensitive equipment or trip breakers under load.
One phase converter powers your entire shop — up to 7.5 HP of simultaneous three-phase load across all your equipment.
Thermal and magnetic protection safeguards your equipment. AutoLink start system prevents inrush damage on startup.
Continuous duty rated. TEFC motor handles 24/7 operation in demanding environments — dust, heat, and vibration.
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 7.5 HP Phase Converters
This rotary phase converter is commonly used to power three-phase equipment in machine shops, fabrication businesses, and workshops running on single-phase utility service.
🎥 See It In Action
Inside the Build — Engineering & Performance
NL Model — 9 Wire Motor Connection (230V)
TEFC vs ODP — Which Motor Is Right?
Phoenix Phase Converters — Full Overview
Talk to an engineer — we'll size the right phase converter for your exact setup
GP7NL Technical Documentation
Complete specs, wiring diagrams, and installation instructions for this phase converter
The GP7NL is a 7.5 HP rotary phase converter designed and manufactured by Phoenix Phase Converters in Phoenix, Arizona. This single phase to three phase converter provides reliable three-phase power from a standard 230V single-phase service, eliminating the need for expensive utility upgrades. Whether you're converting single phase to three phase for a machine shop, welding station, or woodworking facility, the GP7NL delivers clean, balanced output.
Not sure which phase converter size you need? Our engineers can help you calculate the right HP rating based on your equipment list, starting loads, and how many machines run simultaneously. Call us at (800) 417-6568 or use the product datasheet above to compare the GP7NL specifications to your requirements.
Helpful guides
Not sure which HP size fits your application? Our knowledge hub covers everything:
- How to size a rotary phase converter — step-by-step sizing guide with common scenarios
- Phase converter FAQ — quick answers to the most common questions
- Rotary vs static comparison — see why rotary is usually the right choice
