What size phase converter do I need for my equipment?

Match the converter HP rating to the largest single motor you need to run. If running multiple machines simultaneously, size for the largest motor plus 50% of the additional motors' combined HP. For CNC machines with high inrush currents, we recommend sizing the converter at 2x the spindle motor HP. Call (800) 417-6568 for free sizing help from our engineers.

Can I run multiple three-phase machines from one phase converter?

Yes. One of the biggest advantages of a rotary phase converter is the ability to run multiple three-phase machines simultaneously. Connect the converter output to a three-phase sub-panel and run individual circuits to each machine. Size the converter for the largest motor plus 50% of all other motors running at the same time.

What is the warranty on Phoenix Phase Converters?

Every Phoenix Phase Converter comes with a lifetime warranty covering the control panel and all panel-mounted components for the life of the original owner. The generator motor carries comprehensive warranty coverage as well. We also provide free lifetime technical support — call (800) 417-6568 anytime.

Can this phase converter be installed outdoors?

Yes. All Phoenix Phase Converters use sealed NEMA-rated enclosures suitable for indoor or outdoor installation. The NL series uses NEMA 3R enclosures and the PL series uses NEMA 4 enclosures rated for harsh outdoor environments including dust, water jets, and extreme temperatures. Many customers install them in barns, outdoor shops, and agricultural settings.

How do I install a rotary phase converter?

Installation is straightforward for a licensed electrician: (1) Mount the converter near your panel, (2) Install the specified breaker size, (3) Run appropriately sized wire to the T1 and T2 input terminals, (4) Connect three-phase output to your equipment or sub-panel, (5) Power on and verify balanced voltage. Each converter includes a detailed installation manual with wiring diagrams. Call (800) 417-6568 for free installation support.

What is the difference between NL and PL series phase converters?

The NL series features digital smart controls with automatic voltage regulation and NEMA 3R enclosures for standard indoor/outdoor use. The PL series adds a built-in LED power monitoring panel with real-time status indicators for power, phase balance, and fault conditions, plus a heavier-duty NEMA 4 enclosure rated for harsh environments. Both series offer the same power quality and lifetime warranty.

1 (800) 417-6568

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PHOENIX AUTOSTART™

20/40 HP Rotary Phase Converter - GP20/40NL Auto-Zoned Power Rotary Phase Converter

Name: 20/40 HP Rotary Phase Converter - GP20/40NL Auto-Zoned Power Rotary Phase Converter
Brand: Phoenix Phase Converters
SKU: GP20/40NL
Price: 5980.00 USD
Availability: InStock

★★★★★ 4.9/5 (250+ reviews)

$6,621.21$5,980.00Save $641.21

Idler Motor will arrive by freight truck, the panel will arrive by FedEx. If Ordered by 2PM

✓ Lifetime Warranty ✓ Free Shipping ✓ Made in USA ✓ 55+ Years

● IN STOCK — Ships within 2–3 business days

Horsepower 30 HP

Input Voltage 230V

Output Voltage 230V

Frame 286T

kVA 3

Why Phoenix Phase Converters?

⚡

AutoStart Technology

Automatically starts and stops with load demand — no manual intervention required. Saves energy and motor wear.

🏭

TEFC Cast Iron Motor

Totally Enclosed Fan Cooled cast iron idler motor built for demanding industrial environments with years of continuous service.

🛡️

NEMA 4 Enclosure

Indoor and outdoor rated (IP65 equivalent). Protects against dust, rain, and corrosive elements in any work environment.

🇺🇸

Lifetime Warranty

Full lifetime warranty on all components. 55+ years of manufacturing experience — built by Americans, for American industry.

Technical Specifications

Single Phase Input

Voltage Input	230V
Frequency	50/60 Hz
Min Fuse Size	50
Max Fuse Size	150
Max Circuit Breaker	150
Min Service Required	45 KVA
Min Wire Size	2 AWG

Three Phase Output

Voltage Output	230V
Max Output Amps	80
Max Resistive Amps	42
Voltage Balance	+/- 2%
Wire to Generator	3 AWG
Wire to Load	Based On Load
Enclosure	TEFC
Frame	286T
kVA	3
Kilowatts	21.4

What's Included

✓
1x Phoenix Rotary Phase Converter
Factory configured and tested for your application
✓
1x Control Panel (NEMA 4 Enclosure)
Weather-resistant, suitable for indoor and outdoor installation
✓
1x Idler Motor (TEFC Cast Iron)
Industrial-grade motor rated for continuous duty
✓
1x Wiring Diagram
Clear installation schematics for quick setup
✓
1x Owner's Manual
Complete operating instructions and troubleshooting guide

Product Datasheet

Datasheet

Phoenix Phase Converters

GP15NL

Frame

254T

kVA

13.01

Input

230V

Output

230V

Idler Wt

278.9 lbs

Single Phase Input Specifications

Input Voltage	Breaker Min (A)	Breaker Max (A)	Service kVA	Service Amps	Input Wire (AWG Cu)
230 VAC	30	80	13.01	60	4 AWG Cu

Three Phase Output Specifications

Output Voltage	Max Inductive (A)	Max Resistive (A)	Spindle Start (HP)	Comp. Start (HP)	Total Run (HP)	Idler Wire (AWG Cu)
230 VAC / 3Ø	42	22	7.5	6	15	6 AWG Cu

Application Load Sizing Guide (by HP by Load Type)

Easy (HP)	Medium (HP)	Hard (HP)	Very Hard (HP)	CNC Spindle (HP)	Resistive (A)	A/C (HP)
15	12	10	7.5	10	80	6

Load Type Definitions:
Easy: Pumps, fans, blowers, conveyors. | Medium: Lathes, mills, grinders, woodworking. | Hard: Compressors, saws, heavy machinery. | Very Hard: Large compressors, high-inertia loads. | CNC Spindle: CNC machine spindle motors with VFDs. | Resistive (A): Maximum resistive load in Amps. | A/C: Air conditioning / refrigeration (HP).

Standard Features — All NL Models

▸ TEFC (Totally Enclosed Fan Cooled) cast iron idler motor

▸ Motor load breaker compatible

▸ NEMA 4 (IP65) indoor/outdoor flanged enclosure

▸ Precision-balanced capacitor bank

▸ Digital voltage monitor — real-time phase display

▸ Gray White (RAL 7035) powder-coated enclosure

▸ CNC-rated precision voltage balancing (±2%)

▸ Wall mountable control panel

▸ Automatic restart on power restoration

▸ Lifetime warranty on all components

▸ Oversized distribution block and power components

Optional Certifications & Compliance

Certification	Description	Optional
UL 508A	Industrial Control Panel	✓ Available
CSA C22.2 No. 14-13	Industrial Electrical Equipment	✓ Available
TUV	European Safety Standard	✓ Available
CE	European Conformity	✓ Available