Variable Frequency Drives & Digital Phase Converters


Phase-Converting Variable Frequency Drives

1LH4xxR 60 - 125 HP

1LH Performance 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: Pivot Irrigation, Wells Pumps

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: 1LH460R 1LH475R 1LH4100R 1LH4125R
General Power Specs       (not IEEE 519)
Rated HP 60 HP 75 HP 100 HP 4125 HP
Rated Input Current 143A 170A 226A 170A
Input Current w/AuxPower™ C 169A 196A 252A N/A
Input Current w/AuxPower™ X 195A 222A N/A N/A
Input Voltage 460/480V, single-phase
Rated Output Current 91A 107A 142A 172A
Output Voltage 460/480V, three-phase
Other Specs        
Recommended Breaker Size 200A 250A 300A 400A
Breaker Size w/AuxPower™ C 250A 250A 400A N/A
Breaker Size w/AuxPower™ X 250A 400A 400A N/A
Enclosure size (H x W x D) 60 x 66 x 23" 60 x 66 x 23" 60 x 66 x 23" 60 x 66 x 23"
Shipping Weight 502 lbs 547 lbs 594 lbs 652 lbs
Shipping Type Freight Freight Freight Freight