Variable Frequency Drives & Digital Phase Converters


Three-Phase Active Front End Variable Frequency Drives

3LHS4xxR 20 - 50 HP

3LHS Signature Series, VFD’s utilize active front end (AFE) technology to strictly comply with low harmonic standards, regenerate power back on the grid, and control unbalanced three phase without over sizing. 

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3LH 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 Aux Power 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 3LH Series drive utilizes a three-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 lead 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
  • 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: 3LHS420R 3LHS430R 3LHS440R 3LHS450R
General Power Specs        
Rated HP 20 HP 30 HP 40 HP 50 HP
Rated Input Current 31A 46A 61A 77A
Input Voltage 460/480V, single-phase
Rated Output Current 31A 46A 61A 77A
Output Voltage 460/480V, three-phase
Other Specs        
Recommended Breaker Size 80A 100A 100A 100A
Enclosure size (H x W x D) 23 x 51 x 16" 23 x 51 x 16" 23 x 51 x 16" 23 x 51 x 16"
Shipping Weight 163 lbs 166 lbs 170 lbs 174 lbs
Shipping Type Freight Freight Freight Freight


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