Variable Frequency Drives & Digital Phase Converters

1LH SERIES 240 > 480V

Phase-Converting & Voltage-Doubling VFD


1LH Series VFD’s are the only product on the market with optional AuxPower™, a revolutionary solid state phase converter integrated in the cabinet with the VFD. 

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Phase Technologies has designed a groundbreaking VFD that provides full-featured speed control of the main pump and AuxPower™, an optional, independently controlled phase converter to power the entire center pivot system. Compared to a rotary phase converter, AuxPower™ provides superior voltage balance, greater efficiency and higher reliability. Reduce labor cost with one integrated panel that provides everything required for center pivot irrigation.

1LH Series drives have a unique active switching input module that does not produce high levels of harmonic distortion. These drives are IEEE 519 compliant with no additional harmonic filter required.  The active front end also provides the added benefit of power conditioning for the VFD and AuxPower™ outputs.  This allows the user to set the output voltage and control both the pump and pivot without concern for utility power fluctuations.

An optional Voltage doubling 1LH Series drive utilizes a single-phase active front end to boost the 208/240V input and generate 460V three-phase output. This innovative capability eliminates the cost of a transformer and provides significant cost reduction in submersible or long applications by reducing the size of down-hole motor cables.  Phase Technologies now manufactures optional sine filters at a fraction of industry cost to further reduce expenses associated with long lead installations.

Industries served: Wells Pumps, Irrigation Pumps, Motor Control

Standard Features
  • NEMA 3R Enclosure w/Insect Guards
  • Easy Perfect Pressure™ Setup
  • 2-Year Warranty
  • 122° F (50° C) Rated
  • Easy Field Serviceability
  • IEEE 519 Compliant


Optional Add-Ons
  • AuxPower™ 18A or 32A
  • MCCB & Service Rated Disconnect
  • Dv/dt Output Filter (Integrated)
  • Sine Wave output Filter (Integrated)
  • HOA & Speed Potentiometer
  • Strikesorb Surge Protection
  • 0 - 150 psi Transducer
  • Pad Mount Kit


Models: 1LH220R 1LH230R
General Power Specs    
Rated HP 20 HP 30 HP
Rated Input Current 97A 139A
Rated Input Current w/AuxPower™ C 149A 191A
Rated Input Current w/AuxPower™ X 201A 255A
Input Voltage 240V, single-phase
Rated Output Current 31A 46A
Output Voltage 480V, three-phase
Other Specs    
Recommended Breaker Size 150A 200A
Recommended Breaker Size w/AuxPower™ C 200A 250A
Recommended Breaker Size w/AuxPower™ X 250A 300A
Min Wire Size N/A N/A
Enclosure size (H x W x D) 52 x 16 x 18" 52 x 16 x 18"
Shipping Weight 162 lbs 168 lbs
Shipping Type Freight Freight