50 HP Rotary Phase Converters
Compare every 50 HP phase converter Phoenix manufactures — rotary, AutoStart, AutoLink, digital static, and transformer packages — built in the USA with a lifetime warranty. Free sizing help from real engineers at (800) 417-6568.
Compare every 50 HP rotary phase converter we sell — standard, premium, NH/PH high-voltage, AutoStart, AutoLink, transformer packages, and our DualZone 25/50 HP auto-staged model. 50 HP is for heavy industrial loads, large CNC mills, and multi-machine production shops.
Compare All 50 HP Models
Phoenix offers 12 different 50 HP solutions. Choose by what you're powering and your incoming voltage:
| Model | Type | Best For | Voltage | Price |
|---|---|---|---|---|
| GP50NL | Rotary (entry tier) | Standard shop loads | 230V → 230V | $6,785.00 |
| GP50NH | Rotary (460V→460V) | You already have 460V single-phase | 460V → 460V | $7,648.33 |
| GP50PL | Rotary (premium) | CNC, sensitive electronics | 230V → 230V | $7,680.00 |
| GP50PH | Rotary (premium) | CNC, sensitive electronics | 230V → 230V | $8,292.87 |
| GP25/50NL | Rotary (entry tier) | Standard shop loads | 230V → 230V | $8,980.00 |
| GPX50L | Rotary | General industrial | 230V → 230V | $10,199.88 |
| GP50ASL | Rotary w/ AutoStart | Hands-free remote start | 230V → 230V | $10,342.47 |
| GPX50ASL | Rotary w/ AutoStart | Hands-free remote start | 230V → 230V | $10,595.20 |
| Paquete de transformador/convertidor de fa... | Rotary | General industrial | 230V → 230V | $10,969.64 |
| GP50PLT | Rotary (premium) | CNC, sensitive electronics | 230V → 230V | $11,395.10 |
| GP50NLTA | Rotary + AutoLink (NL) | Need 460V output, NL series | 230V → 460V | $12,072.12 |
| GP50PLTA | Rotary + AutoLink (PL) | Need 460V output, premium build | 230V → 460V | $13,095.75 |
Which 50 HP Phase Converter Should I Buy?
Most shop and CNC owners want the GP50NL (50 HP rotary, 230V→230V). It's our best-selling model in this size — true balanced three-phase power for any single largest motor up to 50 HP, plus running multiple smaller machines off the same converter.
Step up to PL series if you have CNC machines, welders, or anything with sensitive electronics — tighter voltage balance for precision loads.
Choose NLT or PLT (Transformer Package) if your equipment needs 460V three-phase but you only have 230V single-phase service. The transformer is built into the package — one purchase, factory-matched.
Pick the GP50NH only if you already have 460V single-phase incoming service. This is rare — most buildings have 230V.
The Digital Static (RD850) is the cheapest option, but only powers about 2/3 of motor rated load and only one motor at a time. Don't use for CNC, welders, or anything sensitive — get the rotary instead.
AutoStart (ASL) adds remote/automatic start — useful if your converter is in a separate building or you want push-button operation.
Not sure? Call (800) 417-6568 with your motor nameplate info or use our free sizing wizard.
All 50 HP Models In Stock
Need Help Sizing Your 50 HP Converter?
Our engineers will match the right model to your motor and application. Free, no pressure.
Call (800) 417-6568Frequently Asked Questions: 50 HP Phase Converters
What can a 50 HP rotary phase converter run?
A 50 HP rotary phase converter is sized to run any single three-phase motor up to 50 HP, or multiple smaller motors as long as the largest is no more than 50 HP. For CNC machines or motors with high inrush, we recommend matching the converter to roughly 2× the spindle motor HP.
What's the difference between a 50 HP rotary and a VFD?
A rotary phase converter produces true balanced three-phase sine wave power and runs multiple machines off one unit through a sub-panel — same as utility three-phase. A VFD only powers one motor at a time, varies its speed, and produces non-sinusoidal output that can damage CNC controllers or sensitive electronics. For multi-machine shops or CNC, the rotary is the right choice.
What size single-phase service do I need for 50 HP?
A 50 HP Phoenix rotary draws roughly 250–350 amps continuous on the single-phase side at 230V. You should have at least a 60-amp single-phase circuit available. Call us with your panel info if you're not sure — sizing the input correctly is critical.
Do I need a transformer with my 50 HP converter?
Only if your equipment requires 460V three-phase and you have 230V single-phase incoming. In that case, choose the GP50NLT or GP50PLT Transformer Package — it includes a properly matched 3 KVA WYE autotransformer pre-wired with the rotary. If your equipment is 230V three-phase (most common), no transformer is needed.
What's included with my 50 HP converter?
Every Phoenix rotary ships fully assembled with the idler/generator, control panel, and operations manual. Cast-iron frame, totally enclosed fan-cooled (TEFC) motor, corrosion-resistant hardware, stainless steel connection plate. You provide single-phase incoming wire, sized to local code, and any output sub-panel.
How fast does it ship?
Most 50 HP units ship in 1–3 business days from our Arizona factory. Expedited shipping available — call to coordinate.