Variable Frequency Drives & Digital Phase Converters


Three-Phase Active Front End Variable Frequency Drives

3LH4xxxR 350 - 450 HP

3LH Performance 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.

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 (LEGS08)


Models: 3LH4350R 3LH4400R 3LH4450R
General Power Specs      
Rated HP 350 HP 400 HP 450 HP
Rated Input Current 415A 478A 515A
Input Voltage 460/480V, single-phase
Rated Output Current 415A 478A 515A
Output Voltage 460/480V, three-phase
Other Specs      
Recommended Breaker Size N/A N/A N/A
Enclosure size (H x W x D) 64 x 73 x 28" 64 x 73 x 28" 64 x 73 x 28"
Shipping Weight 902 lbs 998 lbs 1,096 lbs
Shipping Type Freight Freight Freight


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