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.

3 HP Autostart Rotary Phase Converter GP3ASL

PHOENIX AUTOSTART™

Convertidor de fase rotativo de arranque automático de 3 HP - GP3ASL

Name: Convertidor de fase rotativo de arranque automático de 3 HP - GP3ASL
Brand: Phoenix Phase Converters
SKU: GP3ASL
Price: 1461.28 USD
Availability: InStock

★★★★★ 4.9/5 (250+ reviews)

$1,461.28

CLICK HERE FOR HELP WITH SIZING THE RIGHT CONVERTER Rated for any environment, indoor/outdoor. Designed to work for voltage-sensitive equipment. INPUT: 208-250V - 50/60 hz Single Phase OUTPUT 208-250V - 50/60 hz Three Phase Download the manual below for, Dimensions, Size, Weight, Spec Sheet, and Wiring Diagram Includes Manual Start and Stop with a built-in contactor, and a Voltage Meter Display Load detection to automatically start when it detects a load and the factory setting to turn off in 20 mins when no more load is detected. Our Patented design will turn the phase converter on and off by itself, or manually keep it on. this is perfect for unmanned locations, air compressors, air conditioners, irrigation systems, pumps, or simply for the convenience! DOWNLOAD MANUAL FLAT-RATE $120.00 in the US 48 states. Expedited Shipping FAST SHIPPING!! Idler Motor will arrive by freight truck, the panel will arrive by FedEx If Ordered by 2PM

✓ Lifetime Warranty ✓ Made in USA ✓ 55+ Years

● IN STOCK — Ships within 2–3 business days

Horsepower 3 HP

Input Voltage 230V

Output Voltage 230V

Frame 182T

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	10
Max Fuse Size	25
Max Circuit Breaker	25
Min Service Required	5 KVA
Min Wire Size	10 AWG

Three Phase Output

Voltage Output	230V
Max Output Amps	11
Max Resistive Amps	5
Voltage Balance	+/- 2%
Wire to Generator	10 AWG
Wire to Load	Based On Load
Enclosure	TEFC
Frame	182T
kVA	3
Kilowatts	2.2

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

GP3NL

Frame

182T

kVA

3.5

Input

230V

Output

230V

Idler Wt

78 lbs

Single Phase Input Specifications

Input Voltage	Breaker Min (A)	Breaker Max (A)	Service kVA	Service Amps	Input Wire (AWG Cu)
230 VAC	25	50	3.5	18	14 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	8.4	4.5	1.5	1	3	14 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)
3	2	1.5	1	1.5	18	1

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