Technical Support
230V Single Phase to 3 Phase Converter
24 Products Found
NL
Industrial Grade Rotary Phase Converter
$645.15 – $33,827.06Phoenix Phase Converters build industrial rotary phase converters from 2 HP to 200 HP — converting single-phase power to true three-phase for CNC machines, pumps, compressors, and any industrial equipment....
3 HP Rotary Phase Converter - GP3NL
$749.00The GP3NL rotary phase converter converts single-phase 230V power to three-phase 230V — giving you 3 HP of continuous capacity to run small shop equipment. Ideal for home workshops and...
5 HP Rotary Phase Converter - GP5NL Single Phase to Three Phase Converter
$985.00The GP5NL rotary phase converter converts single-phase 230V power to three-phase 230V — giving you 5 HP of continuous capacity to power your shop equipment. Built for small machine shops...
7.5 HP Rotary Phase Converter - GP7NL Single Phase to Three Phase Converter
$1,590.00The 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...
GP10NL 10 HP Rotary Phase Converter – 230V Single to Three Phase
$1,955.0010 HP three-phase power from your existing 230V single-phase service. The GP10NL provides 10 HP of total running capacity and starts one motor up to 5 HP. Input / output:...
15 HP Rotary Phase Converter - GP15NL Single Phase to Three Phase
$2,543.00The GP15NL rotary phase converter converts single-phase 230V power to three-phase 230V — giving you 15 HP of continuous capacity to run serious industrial equipment. Built for shops and facilities...
20 HP Rotary Phase Converter - GP20NL Single Phase to Three Phase
$2,663.00The GP20NL rotary phase converter converts single-phase 230V power to three-phase 230V — giving you 20 HP of continuous capacity to run serious industrial equipment. Built for shops and facilities...
10/20 HP ROTARY PHASE CONVERTER - GP10/20NL Auto-Zoned Power Rotary Phase Converter
$3,240.00The GP10/20NL DualZone rotary phase converter pairs two 10 HP idler motors to deliver a full 40 HP of continuous three-phase power — with more combined core steel and copper...
25 HP Rotary Phase Converter - GP25NL Single Phase to Three Phase Converter
$3,709.00The GP25NL rotary phase converter converts single-phase 230V power to three-phase 230V — giving you 25 HP of continuous capacity to run serious industrial equipment. Built for shops and facilities...
30 HP Rotary Phase Converter - GP30NL Single Phase to Three Phase Converter
$4,480.00The GP30NL rotary phase converter converts single-phase 230V power to three-phase 230V — giving you 30 HP of continuous capacity to run serious industrial equipment. Built for shops and facilities...
40 HP Rotary Phase Converter - GP40NL - Single Phase to Three Phase Converter
$4,820.00The GP40NL rotary phase converter converts single-phase 230V power to three-phase 230V — giving you 40 HP of continuous capacity to run heavy industrial equipment. Built for machine shops, farms,...
15/30 HP ROTARY PHASE CONVERTER - GP15/30NL Auto-Zoned Power Rotary Phase Converter
$5,230.00The GP15/30NL DualZone rotary phase converter pairs two 15 HP idler motors to deliver a full 40 HP of continuous three-phase power — with more combined core steel and copper...
Free sizing help
Not sure which converter fits your equipment?
Read our complete phase converter guide — types, sizing, and applications explained.
Industrial-grade 230V single-phase to three-phase rotary phase converters, built in Phoenix, Arizona, and backed by a lifetime generator warranty. Available in 3 HP to 100 HP standard models plus 10–200 HP Auto-Zoned dual-power configurations. Every unit ships in 1–2 business days from one of our 12 U.S. warehouses.
Quick sizing rule
2×Standard loads: size the converter at twice the horsepower of your largest motor.
2.5×Hard-starting compressors, HVAC, and high-inertia loads: start at 2.5 times the largest motor HP or choose an NLA AutoLink model.
Built different
Why customers choose a Phoenix phase converter
NEMA 4 weatherproof enclosure standard
Not an upgrade. Rated for indoor or outdoor installation, dust and water resistant.
TEFC cast-iron idler motor standard
Totally enclosed, fan-cooled construction rated for continuous industrial duty.
Lifetime generator warranty
The generator (idler motor) is backed by our lifetime warranty.
Made in the USA
Assembled and tested in Phoenix, Arizona. Full documentation and wiring diagrams included.
Ships in 1–2 business days
Most in-stock systems ship from one of our 12 warehouses coast-to-coast.
50+ years of expertise
Talk to a live phase-conversion specialist, not a call center. Sizing help is free.
How it works
What a 230V rotary phase converter does
A 230V single-phase to three-phase rotary phase converter takes standard 230V (also called 220V or 240V) single-phase power from the utility and generates a true three-phase 230V output for industrial equipment. The rotary design uses an idler generator to produce a real third leg of AC power — not a synthetic or approximated waveform — so it runs motor loads at full rated horsepower, including hard-starting equipment like air compressors, CNC machines, milling machines, lathes, elevators, well pumps, and rooftop HVAC units.
Unlike a static phase converter (which only runs a three-phase motor at about two-thirds of its rated power and is limited to light-duty use) or a VFD (which is normally used for one motor and variable-speed control), a rotary phase converter can run multiple machines at once, handle inductive and resistive loads, and start heavy motors without derating.
- 230V single-phase utility serviceTwo hot legs from the incoming panel (220V, 230V, or 240V nominal).
- Rotary converter and TEFC idlerThe idler generator spins up and creates a real third leg of AC power.
- 230V three-phase outputBalanced three-phase power goes to your industrial equipment.
Sizing
How to size a 230V phase converter
For most standard applications, size the converter at 2× the horsepower rating of your largest motor. That covers starting-current inrush and leaves headroom for additional loads on the same converter. For hard-starting equipment such as air compressors, HVAC compressors, and high-inertia loads, use 2.5× the largest motor's HP, or choose one of our NLA AutoLink models designed for those loads.
Not sure what you need? Use our phase converter sizing wizard, read the full sizing guide, or call 866-559-4250 — we've been sizing these for over 50 years.
2×
Standard loads
Lathes, mills, CNC equipment, pumps, and general shop equipment. Example: a 10 HP largest motor points to a 20 HP converter.
2.5×
Hard-starting loads
Air compressors, HVAC compressors, and high-inertia loads. Example: a 10 HP compressor points to a 25 HP converter or an NLA AutoLink model.
Total running load must remain within the converter's rated capacity. For final sizing, confirm motor nameplate information with Phoenix.
Choose by shop size
230V phase converter models and pricing
Our GP-NL series 230V rotary phase converters range from 3 HP (GP3NL, $749) to 100 HP (GP100NL, $13,034). Auto-Zoned dual-power units — designed to efficiently run either of two motor sizes on demand — range from 10/20 HP up to 100/200 HP.
Small shop
3–10 HPGP3NL, GP5NL, GP7NL, GP10NL
Lathes, mills, small compressors, and single-machine home shops. Starting at $749.
Mid-size shop
15–30 HPGP15NL, GP20NL, GP25NL, GP30NL
Machine shops running multiple tools, larger CNC machines, and mid-size compressors.
Industrial
40–100 HPGP40NL through GP100NL
Irrigation pumps, elevators, industrial HVAC, and large production equipment.
Auto-Zoned dual power
10/20–100/200 HPIdeal when you run either a small load or a large load. The converter automatically zones to the right power level, saving electricity and reducing wear. Models start at $3,240.
Compare
Rotary vs. static phase converter vs. VFD
| Capability | Rotary converter | Static converter | VFD |
|---|---|---|---|
| Runs multiple machines at once | Yes | No | Normally one motor |
| Full rated motor horsepower | Yes | No; typically about two-thirds | Yes, when properly selected |
| Hard-starting loads | Yes, when properly sized | Limited | Varies by application |
| Balanced three-phase power for a shop | Yes | No | Single-motor output |
| Variable-speed control | No | No | Yes |
Results vary by equipment, installation, and utility service. Call 866-559-4250 for a recommendation on your machines.
Applications
Common applications for a 230V rotary phase converter
CNC machinesHaas, Mazak, Bridgeport, Fadal, Hurco, and more
Lathes and metal turning equipmentEngine lathes, turret lathes, and turning centers
Air compressorsRotary screw and reciprocating compressors
Milling machines and shop toolsMills, drill presses, band saws, and general shop equipment
HVAC and refrigerationRooftop units and industrial air conditioning
Well pumps and irrigationSubmersible well pumps and irrigation systems
Elevators and residential liftsHydraulic and traction lift equipment
AgricultureGrain dryers and agricultural equipment
WeldingWelders and three-phase welding equipment
WoodworkingLarge planers, jointers, and wide-belt sanders
FAQ
Frequently asked questions about 230V phase converters
Will a 230V phase converter run my 220V or 240V equipment?
Yes. In North America, 220V, 230V, and 240V are the same nominal voltage — utility voltage varies slightly by region and time of day. A 230V rotary phase converter runs equipment labeled for any of these voltages without any modification.
How much does a 230V phase converter cost?
Our 230V rotary phase converters start at $749 for a 3 HP GP3NL and scale up to $13,034 for a 100 HP GP100NL. Auto-Zoned dual-power models start at $3,240. See individual product pages for current pricing and available discounts.
Do I need a 230V or a 480V phase converter?
If your single-phase utility service is 230V (typical for residential and light-commercial buildings), and your equipment runs on 230V three-phase, you need a 230V-to-230V converter — this collection. If your equipment runs on 460V or 480V three-phase, you need a 230V-to-460V phase converter with a step-up transformer.
How long does a rotary phase converter last?
A properly sized and installed Phoenix rotary phase converter routinely runs 20+ years. The generator (idler motor) is covered by our lifetime warranty — most competitors offer only 2–5 years.
Can I run multiple machines on one 230V phase converter?
Yes — that's one of the biggest advantages of a rotary phase converter over a VFD. Size the converter for 2× the largest motor's HP, and you can run additional smaller motors on the same converter as long as the total running load stays within the converter's rated capacity.
How fast can I get one?
All in-stock 230V rotary phase converters ship within 1–2 business days from our nearest warehouse. Freight delivery to your location typically takes 3–7 business days depending on location.
Do you offer sizing help?
Yes — free. Call 866-559-4250 and speak with a phase-conversion specialist. We've been sizing these for over 50 years, and we'll spec the right converter for your specific equipment, voltage, and installation.
Talk to a Phase Converter Engineer
📞 800-417-6568Free sizing help • Lifetime warranty • Made in USA • Mon–Fri 7AM–5PM MST