Technical Support
AutoStartβ’ Technology
3 HP Autostart Rotary Phase Converter
Model: GP3ASL Β· Single Phase β Three Phase Β· 240V
$1,461.28
Free phone sizing Β· Ships within 5 days
NEMA 4 Enclosure
TEFC Cast-Iron Idler
Lifetime Warranty
Made in USA πΊπΈ
π Talk to an Engineer β 800-417-6568
Not sure this is the right size? Call us β we'll size it right the first time. No pressure.
AutoStart Active
40,000+
Units Shipped
4.9β
Customer Rating
Since 2003
Family-Owned
Lifetime
Warranty
U.S.A.
Hand-Assembled
What Makes AutoStart Different
Stops when you stop.
Starts when you start.
Every standard rotary converter spins 24/7 the moment you flip it on β burning power whether you're cutting or on lunch. AutoStart's onboard controller shuts the converter completely off when load drops, and fires it back up in under a second when you press cycle-start.
Zero Standby Draw
Converter is fully off β not idling, not spinning, not drawing a watt β between jobs. Standby draw: 0.
Patented
Sub-Second Restart
AutoStart fires in under 1 second when load returns. No button to press, no waiting β just press cycle-start on your machine.
Automatic
Industrial-Grade Build
NEMA 4 weather-resistant enclosure + TEFC cast-iron idler motor standard. Mount it in a barn, dust-filled shop, or outdoor pad.
Standard β Not Upgrade
Live Remote Monitoring
Real-time voltage, current, and temperature streaming to your phone. Fault alerts before they become failures.
Built-In
Multi-Layer Protection
Overvoltage, phase-loss, high-temperature, and overload protection built in. Shuts down safely, logs the fault, alerts you.
Fail-Safe
Pays for Itself
On a typical 8-hour shop day with a standard rotary, AutoStart pays back its price difference in roughly 2 years through power savings.
ROI ~2 Years
How It Works
Four states.
Full control.
AutoStart's onboard controller watches your machines and responds instantly. No timers, no manual switches.
1
Machine Idle β Converter Off
When no load is detected, AutoStart shuts the converter completely off. Zero draw, zero spin, zero cost.
2
You Press Cycle-Start
Your machine sends a start signal. AutoStart detects load and fires up the converter automatically.
3
Converter Up in <1 Second
Converter spins up and delivers clean, balanced three-phase power. You're cutting in under a second.
4
Walk Away β It Shuts Off
Load drops, timer counts down, converter powers off completely. Next morning it's ready the moment you hit start.
Power Draw β Typical Machining Day
Standard rotary: converter runs at full draw all day.
AutoStart: only draws power when you're actually cutting.
Specifications
Built to spec.
Every detail.
| Specification | Details |
|---|---|
| Model | GP3ASL |
| HP Rating | 3 HP |
| Input | 208β250V Β· 50/60 Hz Β· Single Phase |
| Output | 208β250V Β· 50/60 Hz Β· Three Phase |
| Enclosure | NEMA 4 β Weather-resistant, rated for outdoor/washdown environments |
| Idler Motor | TEFC Cast-Iron β Sealed bearings, totally enclosed fan-cooled |
| Voltage Balance | Within 3% leg-to-leg under load |
| AutoStart Control | Onboard patented controller β shuts off at idle, restarts in <1 second |
| Remote Monitoring | Web-based dashboard β live voltage, current, temperature Β· iOS & Android |
| Protection | Overvoltage Β· Phase-loss Β· High-temperature Β· Overload Β· Fail-safe shutdown |
| Warranty | Lifetime β Parts and labor. No expiration. No fine print. |
| Support | 1 year one-on-one phone support with the engineer who built it |
| Made In | Phoenix, AZ β USA πΊπΈ Hand-assembled, load-tested, serial-tracked |
| Compatible Machines | CNC Β· Lathe Β· Mill Β· Welder Β· Air Compressor Β· HVAC Β· Pump Β· Any 3-phase load |
π
Lifetime Warranty. Full Stop.
Every Phoenix converter ships with a lifetime warranty covering all parts and labor. No fine print, no time limits, no exceptions. If it fails, we fix it β or replace it. Call 800-417-6568 and talk to the engineer who built yours.
Ready to Order
Stop guessing.
Start knowing.
Call us, we'll verify sizing, answer every question, and get your unit shipped fast.
Family-owned since 2003 Β· 60+ years combined experience Β· You'll talk to the engineer who built it
Talk to a Phase Converter Engineer
π (800) 417-6568Free sizing help • Lifetime warranty • Made in USA • MonβFri 7AMβ5PM MST